SAN) 6. (.-44 HARVARD UNIVERSITY Library of the Museum of Comparative Zoology Revision of the balanomorph barnacles; including a catalog of the species MU8. COMP. ZOOL... r-IBRARY NOV 221977 HARVARD UNIVKRSiTY William A. Newman and Arnold Ross MEMOIR 9 San Diego Society of Natural History 1976 Revision of the balanomorph barnacles; including a catalog of the species William A. Newman and Arnold Ross Scripps Institution of Oceanography and San Diego Natural History Museum MEMOIR 9 San Diego Society of Natural History 1976 SAN DIEGO SOCIETY OF NATURAL HISTORY MEMOIRS MEMOIR 9, pages 1 - 108 Issued March 31, 1976 Frontispiece. Chionelasmus darwini (Pilsbry)*, one of the most generalized or primitive living balanomorphans, is known from two isolated insular situations where it inhabits relatively deep water (approx. 450m|. The first specimens were taken near the turn of the century by the U. S. Fisheries Steamer Albatross off Kauai Island, Hawaii, and then a couple of decades later by a cable ship off Rodriguez Island, southwestern Indian Ocean. While additional specimens have been taken near the original locaUties, there are no reports of any having been found between these two extremes. Chionelasmus therefore qualifies as a refugial form, but not a usual one since it is both insular and in relatively deep water, well out of the mainstream of balanomorph evolution. ♦(RA^ Te Vega Sta. 23-95, Sept. 4, 1971, S. of Molokai I., Hawaii - specimens courtesy of Dr. D. P. Abbott, Hopkins Marine Station, Stanford University.) PUBLISHED WITH FINANCIAL AID FROM THE W. W. WHITNEY PUBLICATIONS ENDOWMENT CONTENTS Introduction 9 How to use this work 9 Acknowledgments 10 Historical 10 Origin of the Balanomorpha 14 Monophyletic 14 Polyphyletic 15 Evolution and diversification 17 Chthamaloidea 17 Balanomorphoidea 20 Balanoidea 22 Morphology 24 Composition and definitions of suprageneric taxa 36 Order Balanomorpha 36 Superfamily Chthamaloidea 36 Family Catophragmidae 36 Family Chthamalidae 36 Superfamily Balanomorphoidea 36 Family Coronulidae 37 Family Bathylasmatidae 37 Family Tetraclitidae 37 Superfamily Balanoidea 38 Family Archaeobalanidae 38 Family Pyrgomatidae 38 Family Balanidae 39 Catalog of species 40 Superfamily Chthamaloidea 40 Family Catophragmidae 40 Family Chthamahdae 40 Subfamily Pachylasminae 40 Subfamily Euraphiinae 40 Subfamily Chthamalinae 41 Superfamily Balanomorphoidea 43 Family Coronuhdae 43 Subfamily Chelonibiinae 43 Subfamily Emersoniinae 44 Subfamily Platylepadinae 44 Subfamily Coronulinae 44 Family Bathylasmatidae 45 Subfamily Bathylasmatinae 45 Subfamily Hexelasminae 46 Family TetracUtidae 46 Subfamily Austrobalaninae 46 Subfamily TetracHtellinae 46 Subfamily TetracUtinae 47 Superfamily Balanoidea 49 Family Archaeobalanidae 49 Subfamily Archaeobalaninae 49 Subfamily Semibalaninae 55 Family PjTgomatidae 56 Subfamily Pyrgomatinae 56 Subfamily Ceratoconchinae 58 Subfamily Bosciinae 59 Family Balanidae 59 Incertae sedis 69 Literature Cited 71 Bibliographic Supplement 100 Index 103 INTRODUCTION The Cirripedia constitutes a diverse and abundant subclass of crustaceans, and repre- sentatives are found in virtually all marine environments. There are four orders, the Asco- thoracica, Rhizocephala, Acrothoracica and Thoracica. The Thoracica contains the true barnacles and these are distributed between three living suborders; the stalked barnacles or Lepadomorpha, the asymmetrical sessile bar- nacles or Verrucomorpha, and the sessile acorn barnacles or Balanomorpha. These appear in the Silurian, the middle Cretaceous, and the late Cretaceous, respectively. The Balanomorpha en- compasses the greatest diversity of free-living and symbiotic forms, and as Darwin (1851a:5) noted, the present epoch may go down in the fossil record as the "Age of Barnacles" (Fig. 17). The basic classification of the Thoracica was formulated by Darwin (1854b), and his system was expanded and somewhat revised by Pilsbry (1907a;1916). Pilsbry's classification formed the basis for that in the Treatise on Invertebrate Paleontology (Newman et al, 1969). Although the Treatise provides diagnoses of taxa to the generic level, it does not enumerate the species contained in each genus, nor does it provide a guide to the hterature concerning them. The present study fills these needs for the Balanomorpha. It also constitutes the first major revision of higher taxa in more than half a century. The Balanomorpha may not be an entirely natural assemblage, but rather a grouping of phylogenetically parallel lineages not readily derivable from one another nor from a common balanomorph ancestor. The possibility of at least a diphyletic origin was suggested by Withers (1924:2). Thus, in preparing this revision we were alert to the possibility that the Balano- morpha might be separable into two or three suborders. However, in the final analysis it be- came clear that such a proposal was indefens- ible or premature. Therefore, the Balanomorpha in the broad sense has been retained. Yet three major lineages can be recognized, and we con- sider them to constitute superfamilies: Chthama- loidea, Balanomorphoidea and Balanoidea. In addition, one new family and numerous sub- families are also proposed here, and many of the 65 genera contained in the Balanomorpha are redistributed within this modified systematic framework (Fig. 1). Much of what has been done here might be interpreted by the casual observer as simply "splitting" and "rank-raising." Indeed, Hyman (1959:697) voiced concern over systematic prac- tices in recent years: "Any acute observer can- not fail to notice the disease prevalent in zoological systematics today of raising rank of groups and of assigning high ranks to groups that differ only in minor characters." Neverthe- less, in the present study new lines of evidence indicate previously unrecognized affinities, and it seems to us that the classification must be altered and expanded to accommodate them. Initially, classification of thoracicans de- pended on surficial morphology of the shell, and it is only in recent years that thin sec- tions have revealed remarkable internal struc- tures that have drastically altered our under- standing of the affinities among the Balanomorpha. Likewise, comparative studies of trophi and chaetotaxis, or of such structures as the base of the intromittant organ, have greatly improved and broadened our understanding of interrelationships between higher and lower taxa. In addition, numerous collections by both individuals and expeditions, from the deep sea, from coastal waters, and especially from tropical seas where the greatest diversity is found, have provided new materials that have compelled us to alter our concepts and rearrange existing groupings in order to continue to develop a natural system. If our system is accepted, the practical inconvenience and annoyance will really be quite temporary. HOW TO USE THIS WORK The specialist will probably have httle dif- ficulty in using this work, but some explana- tions seem appropriate. It is divided into three parts: evolution, systematics and catalog of species. We have attempted to arrange the genera and higher taxa phylogenetically. How- ever, for simplicity, ease, and (or) lack of knowledge, species are listed alphabetically under their respective genera or species groups in the catalog. The index is the entree to species. The first page number given after each species leads to that species in the catalog. For genera and higher categories, and for some species, the index leads into the systematic and evolutionary sections as well. Species names in the index are given without generic indication unless they have been used in more than one genus. In such cases the generic names used in this work are given. 10 Diagnoses of suprageneric taxa, and for a single new genus (Notobalanus), are provided in the systematic section. Diagnoses for estab- lished genera can be found in the Treatise on Invertebrate Paleontology (1969); original sources for subsequently described genera are cited herein. The general arrangement of the catalog fol- lows that of the preceding evolutionary and systematic sections. The original author, date and page are cited for each species and, where appropriate, a citation of the most compre- hensive synonomy, which may not necessarily be the most recent. This is followed by a relatively complete list of references through 1973, but including many through 1975; many of the non-systematic papers are briefly anno- tated. Finally, general distributional and some- times bathymetric and stratigraphic data are included, but needless to say, distribution of the majority of the species is very poorly known. Following the body of the catalog there is a list of species incertae sedis. ACKNOWLEDGMENTS The primary data base for this work was, quite naturally, the hterature, and we have cited virtually all that was available to us. Much of the contemporary literature was made available as reprints by authors and others, and we thank them for their generosity. A large portion, however, came from various university and museum libraries, over many years, through direct borrowing and interhbrary loans. Librarians involved are too numerous to mention individually, but we thank them, known and unknown to us, for their services. As with many data bases, sources extend well beyond pubhshed works, and we are much indebted to numerous cirripedologists for vol- uminous oral and written communications. There have been so many we hesitate to mention them by name, for fear of not including all. But we must acknowledge Huzio Utinomi of the Seto Marine Biological Laboratory; Alan J. Southward of The Laboratory, Plymouth; EUza- beth C. Pope of the Australian Museum; and Victor A. ZuUo, University of North Carolina at Wilmington. Data were also extracted from the vast collections of the Scripps Institution of Oceanog- raphy and the San Diego Natural History Museum, and from materials made available on loan by curators of collections in other insti- tutions. In particular, we would Uke to thank Thomas E. Bowman of the National Museum of Natural History; Torben Wolff of the Zoologi- cal Museum, Copenhagen; Jan Stock of the Zoological Museum, Amsterdam; L. B. Holthuis of the Rijkmuseum, Leiden; J. P. Harding of the British Museum (Natural History); WiUiam K. Emerson of the American Museum of Natural History; and J. Wyatt Durham of the Paleon- tology Department, University of California, Berkeley. We have also garnered knowledge and experience from innumerable specimens sent to our laboratories for identification by ecologists from all over the world. Development of the catalog has passed through the hands of several assistants. It be- gan many years ago as a compilation of references to species of immediate interest in contemporary literature, and was subsequently expanded to include all primary hterature on all species by Mrs. Carol Platt-Kourtz, who carried it forward for five years as a sideline to her regular work. Mrs. Cecelia Ross spent nearly a year of intensive work on it, and finally Ms. Gayle Kidder aided substantially in bringing it to its present state. We thank these young ladies for their concerted efforts and ask their forgiveness for the moments when attention to detail became excessively tedious. This revision is for the most part a by- product of our work on the systematics of the Cirripedia. Support, in part, was provided by several grants from the National Science Foun- dation (to W.A.N. : GB-4973X through BMS575- 17149), and these are gratefully acknowledged. HISTORICAL Classification of the thoracican Cirripedia, beginning in good part with the work of Leach (1817, 1818, 1825) and Gray (1825), was placed on a firm foundation by Darwin (1851-1854). Darwin's three basic divisions, the Lepadidae, Verrucidae and Balanidae, are the principal ones recognized today (Pilsbry, 1907a, 1916; Kriiger, 1940; Withers, 1953; Newman et al, 1969). Progress in the classification of the Thoracica, from Leach (1817-1825) to that being proposed, is given in Figure 1. Gruvel's (1903b) classification is omitted. Suprageneric taxa are indicated only under the Balanomorpha. The Lepadomorpha (= Lepadidae sensu Darwin) contains the most primitive Thoracica, members of which are inferred to have arisen from a free-hving stem near the Ascothoracica (see Newman et al, 1969; Newman, 1974:437). While the unity of the Lepadomorpha has never been questioned, the relationships of the scalpeUi- 11 Leach 1825 Ord Campylosomata^ Ord Acamptosomala Fam Clisiadae Fam. Balamdae ■^^-- — Fam, Coronuladae Gray 1825 -Fam Analifidae "^Fam PolUcipedidae - Fam Balamdae - Fam Pyrgomatidae - Fam Coronubdae Darwin 1854 Ord Thoracica y Fam Lepadidae''^^ Fam Verrucidae ^ Fam Balamdae -^ Subfam Chlhamalm. Subfam Balanmaf Present Subor Lepadomorpha Subor Brachy lepadomorpha rSubor Verrucomorpha /// Pilsbry 1907-16 /X/sybor Balannmorpha Subor Lepadomorpha // Subor Verrucomorpha y'v"^ Subor Batanomorpha Fam Chthamahdae Balamdae bfam Chelonibiinae Subfam Coronu Subfam Balanmae /Fam I Fam Fam Chthamahdae Subfam Catophragminae Subfam. Pachylasmmae Subfam Chthamahnae Fam Bathylasmatid Fam Tetrachtidae Fam Balamdae Subfam Chelonibi Subfam CoronuUn Subfam Fmersoniinae- Subfam Balaninai Subfam- f'yrgomatinae Proposed for Balanomorpha Subor Balanomorpha Pilsbry 1916 Superfam Chthamaloidea Darwin 1854 Fam CaLopfiragmidae Utinomi 1968 Fam Chthamahdae s s Subfam Pachylasmtnae Utinomi 1968 Subfam Euraptumae nov. Subfam. Chthamahnae s s Superfam Balanomorphoidea nov Fam Coronubdae Leach 1817 Subfam Chelombunae Pilsbry 1916 Subfam Emersonimae Ross 1967 Subfam Platylepadinae nov. Subfam Coronuhnae s s Fam Bathylasmatidae Newman & Ross 1971 Subfam Bathylasmatmae s.s Subfam Hexelasminae nov. F"am Tetrachtidae Gruvel 1903 Subfam Austrobalamriae nov Subfam TetracUtethnae nov Subfam Tetracbtmae s s. Superfam Balanoidea Leach 1817 Fam Archaeobalanidae nov .Subfam Archaeobalaninae s s Subfam Semibalaninae nov Fam Pyrgomatidae Gray 1825 Subfam Pyrgomatinae s.s. Subfam Ceratoconchinae nov. Subfam Bosciinae nov. Fam. Balamdae s.s. Figure 1. History of the classification leading to that proposed for the Balanomorpha. form and lepadiform groups remain obscure. However, problems that arise in this regard have no direct bearing when considering the origins of the Balanomorpha, because it is generally agreed that one looks to the scalpelli- form or pollicipoid barnacles for the antecedents of the sessile barnacles (Darwin, 1854b; Withers, 1953; Broch, 1924; Newman et al, 1969; Newman and Ross, 1971). Darwin's (1854b) classification of the Thoracica reflects the view that the sessile barnacles (Verrucidae and Balanidae) evolved from the Lepadomorpha as independent lineages. The Verrucomorpha was recognized by Darwin (1854b:495) as sharing a number of character- istics with the Lepadomorpha and the Chtha- mahdae among the Balanomorpha. However, the sum of the characters he enumerated favor a lepadomorph rather than a balanomorph an- cestry for them. Withers (1914:945) considered Prouerruca from the upper Cretaceous to "con- stitute, in fact, the 'missing link' between the pedunculate Cirripedes of the family Polhcipedi- dae [= Scalpellidae] and the sessile asymmetri- cal Cirripedes of the family Verrucidae." The two lateral plates of one side seen in Prouerruca, and Eouerruca but missing in Verruca, are homologous with those of the presumed an- cestor of the Balanomorpha as well as the Verrucomorpha. Thus, what these early verrucids indicate is that the lepadomorph ancestors of both suborders were comparable (Fig. 2). The next sessile suborder, the extinct Brachylepadomorpha, was unknown to Darwin. It was instituted by Withers (1923:37) to ac- commodate Brachylepas, which Woodward (1901: 150) previously considered a pedunculate bar- nacle. Withers (1953) subsequently discovered that Pycnolepas Withers (1914) was not only a sessile barnacle, but also that it was inter- mediate in structure between stalked barnacles and Brachylepas (Fig. 2). He stated that, while the Brachylepadomorpha "includes the commonest and most widespread of the Cre- taceous symmetrical sessile cirripedes. . . ." they "do not appear to be in the direct line of descent of the Balanomorpha, as already pointed out by Pilsbry. They apparently repre- sent an independently developed sessile type, which, except for the reduced number of capitu- lar valves, probably resembled the ancestor of the Recent primitive Balanomorpha (Catophrag- mus)" (Withers, 1953:344; see Fig. 2). Gruvel's (1903b) classification of the Balano- morpha departed radically from Darwin's scheme, but it was rejected by Pilsbry (1907a, 1916) and subsequent workers as in good part un- natural. Pilsbry (1907a, 1916) elevated Darwin's famihes to suborders, primarily to allow for an expanded classification at subfamihal levels. Darwin's Balanidae thus became the Balano- morpha, containing two families, the Chthamah- dae and Balanidae. He further divided the Balanidae into the Balaninae, Chelonibiinae, and Coronuhnae, all primarily on the basis of shell characters. Numerous subgenera, in good part based on characters Darwin (1854b) used in formu- lating sections, have been proposed, particularly by Pilsbry (1916) and Hoek (1907), especially 12 Ir i Ic PoUicipoid Lepadomorpha Figure 2. Monophyletic origin of the Balanomorpha and inferred relationships: The principal divisions (superfamilies) of the Balanomorpha are directly related to and stem from a pedunculate stock allied but distinct from that which gave rise to the Verrucomorpha and Brachylepadomorpha. Radiations and relationships of the superfamilies are illustrated in figures 4, 5 and 6. (see text for discussion.) 13 in the Balaninae. Yet, in the years since Pilsbry (1916), few alterations have been made in the basic classification of the Balanomorpha. Nilsson- Cantell (1921) resurrected GruveFs (1903b) Tetra- clitinae (in part) as a subfamily of the Balani- dae, and fostered the Stellatus- and HembeU- groups of Chthamalus, suggested by Pilsbry (1916). Ross (1968) subsequently elevated the Tetraclitinae to familial level; Utinomi (1968) divided the Chthamalidae into three subfamilies; Ross (in Ross and Newman, 1967) created the subfamily Emersoniinae for an extinct form allied to the turtle barnacles; Newman and Ross (1971) proposed the family Bathylasmatidae for a group of relatively primitive deep water balanoids; and Ross and Newman (1973) resurrected Gray's (1825) Pyrgomatidae (in part), a name available for a group of coral barnacles designated Creusiinae by Baluk and Radwanski (1967b: 468). Despite these advances the broad aspects of the classification have remained the same. As it stands, it fails to portray many actual or inferential relationships and this has necessitated the present revision. Although appUcation of the biological species concept spread in systematic studies of other groups, the Darwinian tradition of numerous varieties (subspecies) in the cirripeds has con- tinued to prevail, especially in the Stellatus- group of Chthamalus, Tetraclita s.s., the Balanus amphitrite group, the subgenus Megabalanus, and the coral barnacles. Students of the balanomorphs will find some unfamiliar features in what we propose and these may be quite disconcerting without back- ground information. Darwin's work on the Cirri- pedia had a profound two-fold effect. On one hand, he established the basic classification and brought order to a chaotic and wide spread literature. On the other hand, he arranged the higher taxa in such a manner as to bias virtually all subsequent phylogenetic studies. While Hoek (1913) and Pilsbry (1916) expanded upon the basic framework, they retained the Darwinian order in their monographs in which the morphologically primitive forms, the chtha- malids and coronuhnids, appeared at the end and the more highly evolved forms such as Megabalanus, appeared at the beginning. The first break in tradition came with Gruvel (1905a), and in a more acceptable manner, with the work of Nilsson-Cantell (1921), Kriiger (1940), and Withers (1953), where the various groups were, with the exception of the turtle and whale barnacles, placed in a more or less acceptable phylogenetic sequence. The present study is a further attempt to order the balanomorphs as naturally as possible, down to and including the subgeneric level. In doing so, some marked departures from pre- vious classifications have been made. This may not prove upsetting to new students of the Balanomorpha, but the "old Hne" may find it difficult to accept the turtle and whale barnacles as groups having relatively primitive origins, and to find the tetraclitids closer to them than to the balanids. It may also prove disconcerting to find that most free-living acorn barnacles cannot be readily assigned to either Chthamalus, Balanus or Tetraclita. But it must hkewise have been upsetting to earUer students of the group when certain workers decided that most barnacles were not Lepas as Linneaus had established. The changes proposed herein reflect a sharpen- ing of resolving power over the past decade or so, a sharpening made possible through the efforts of many students of this remarkable and fascinating group of animals. Beginning on page 25 we illustrate various features and relationships of the shells and ap- pendages of the balanomorphs. These were orig- inally prepared to aid us in our understanding of the diversity of morphologies involved, and it is hoped that they will be useful to the reader. 14 ORIGIN OF THE BALANOMORPHA MONOPHYLETIC Until recently the Balanomorpha consisted of the Balanidae and Chthamalidae. Darwin (1854a:152, 176) and subsequent authors, con- sidered the Chthamahdae the more primitive and directly derivable from scalpelliform bar- nacles. The criteria for this judgment cover both homologies of hard parts and morphology of appendages, especially in the most primitive or generalized chthamalid, Catophragmus (Catomer- us). The fossil record supports this interpreta- tion, because Catophragmus appears in the late Cretaceous. Representatives of the Balanidae do not appear until the early Eocene. In the chthamalid Pachylasma, while the body and appendages are wholly chthamaloid, the shell wall and to some extend the opercu- lum are in certain respects balanoid in appear- ance. Darwin (1854b:475) stated that when he first examined the shell of Pachylasma he "did not doubt that it was . . . Balanus." But when he examined the animal's body, he found the characteristics preeminently chthamaloid, and concluded that (1854b:477) "Pachylasma would be the point of contact [of the Chthamalidae] with the Balaninae, . . . [for] when the shell alone ... is examined, it is hardly possible to separate this genus [Pachylasma] from Balanus. " Unfortunately, the fossil record does not lend support to this view because Pachylasma first appears in the Miocene, well after the appear- ance of Balanus. Nonetheless, the implication exists; the Balanidae may have come from the Chthamahdae via Pachylasma. Subsequent work on the origin of the Balani- dae seemed to make a chthamahd ancestry more plausible. Hoek (1883, 1913) described a number of deep-water species that appeared by shell characters to belong to Balanus, but the nature of the soft parts, particularly the structure of the labrum and the third cirrus, was atypical, and while he considered them balanids, he pro- posed the genus Hexelasma for them. Pilsbry (1916) reviewed the status of this genus and concluded that the species in Hexelasma be- longed instead to the Chthamalidae, close to Pachylasma, and this assignment was followed by Kruger (1940), Withers (1953), Zullo (1963a), and Utinomi (1968). Zullo (1963c:190) oversimpli- fied this picture with his sweeping statement that "the Balanidae . . . differ materially from the Pachylasma group [including Hexelasma] only in the structure of the labrum . . . and that they were derived from the Pachylasma group stock." Despite this oversimphfication it would seem at this point that there would be relatively little difficulty in deriving balanids from chthamahds, for the shell of Pachylasma and soft parts of Hexelasma would appear, superficially, to bridge the gap. Taking this simplistic view at face value, a model for a monophyletic diversification of the Balanomorpha would be as follows (Fig. 2). The Chthamalidae, containing the most primitive members of the suborder, gave rise to the re- mainder of the Balanomorpha. Fundamentally, chthamahd hard parts consist of deeply articu- lated opercular valves, a wall of eight solid plates (three pairs of laterals overlapping the unpaired carina and rostrum), and several whorls of small imbricate plates, comparable to the peduncular plates of certain scalpeUids, surround the region where the wall contacts the sub- stratum. The basis is membranous. A large bullate, lepadomorphan-Uke labrum surrounding the mouth parts has mandibular palps situated on its lateral margins. The scalpellid-Uke man- dible, composed of several incisor-hke teeth and a spinous rather than molariform inferior angle, is simple. The first and second cirri are modified to assist in the transfer of food captured by the posterior four pairs to the mouth parts; that is they have been modified to serve as maxiUi- peds. The cirri, armed with simple setae and lack- ing speciaUzed spines are hke those of the Le- padomorpha. The penis, originating between the last pair of cirri below the anus and flanked by a pair of multiarticulate caudal rami or appen- dages (the furca), lacks a basidorsal point. All these features are found in the most generaUzed members of the extant Chthamaloidea, Catophrag- mus sensu lato, fossil forms of which are the old- est balanomorphs known (late Cretaceous). Diversification of the chthamahds included the appearance of a number of Uneages in all of which the whorls of imbricate plates were lost, the number of wall plates was reduced from eight to six, and in some cases four, and the caudal appendages inevitably disappeared (Fig. 4). The reduction of wall plates from eight to six was accomphshed in two different ways — most commonly the carinolaterals drop out, thereby retaining the arrangement where the rostrum as well as the carina remain over- lapped; and less commonly, the rostrolaterals fuse with the rostrum forming a compound plate that overlaps the adjacent laterals. The latter 15 arrangement is the same as that seen in higher non-chthamalid Balanomorpha and is presumed to herald them. The chthamalid bullate labrum, inherited from the Lepadomorpha, gave way to the thick but non-bullate condition, with concomi- tant changes in the nature of the mandibles to the more advanced balanid type. The third cirri became intermediate in structure between the second and fourth rather than more closely resembling the fourth, and the opercular valves became complexly but not deeply articulated; all features seen in Hexelasma and related genera (Bathylasmatidae). Further advances included a flattened labrum that became cleft, aiding in the removal of food from the cirri. Concomitant with this, the third pair of cirri completed the transformation to maxiUipeds. Apparently at this point the sohd- waUed Balanidae and Tetraclitidae appeared and diverged from the ancestral Bathylasmatidae (Figs. 2, 4 and 5). Both went on to develop distinctly different complex wall tj^es, variously armed cirri, and in the balanids, a penis with a basidorsal point. POLYPHYLETIC As palatable as the monophyletic scheme may be, Zullo (1963c:190) noted that there were conflicting views regarding affinities within the Balanomorpha and that it is possible that the balanomorphs are polyphyletic. Withers (1924:2) stated that he was "not at all convinced that the Chthamalidae and Balanidae . . . are so nearly related as is supposed," but he did not pursue the subject in subsequent writings (through 1953). Recently, Utinomi (1968:33), expressed a similar view, suggesting that the two families were independently derived from lepado- morph ancestors, but unfortunately he did not elaborate further on the matter. We became involved in the problem of the unity of the Balanomorpha when working on a revision of Hexelasma (Newman and Ross, 1971). In this re- gard, Bage (1938:10) had already pointed out that, "from the examination of the soft parts of the animal it is apparent that the reference of the genus [Hexelasma] to the Balanidae or Sessile Cirripedia Pedunculate Cirripedia Figure 3. Polyphyletic origin of sessile cirripeds: It is weU documented that extinct Brachylepadomorpha and the Verruco- morpha (Jurassic to middle Miocene, and middle Cretaceous to Holocene, respectively) evolved from pedunculate ancestors be- fore the appearance of the Balanomorpha (Cretaceous to Holocene). The Balanomorpha also descended from pedunculates rather than from earlier sessile groups (see fig. 2 for fundamental structural differences). Thus, sessiUty evolved three times. However, there have been suggestions in the literature that two or more of the principal divisions of the Balanomorpha also may have had separate pedunculate ancestors, as illustrated here. If this were so, sessihty within the Thoracic would have evolved four or five times (see text for discussion). 16 Chthamalidae, discussed by Hoek (1913) and Pilsbry (1916), remains unsettled." In our study (Newman and Ross, 1971:143) it became clear that Hexelasma and its allies stand distinctly apart from the chthamaloids and balanoids and that it was impossible to supply facts supporting the long standing view that it is from the chthamaloids, through Pachylasma and Hexe- lasma, that the balanoid barnacles have descend- ed. Therefore, we instituted the Bathylasmatidae, to accommodate several genera, including Hexelasma, because the group could not be properly assigned to either the Chthamalidae or the Balanidae, and suggested that antecedents of the bathylasmatids may well be found among the scalpellid Lepadomorpha rather than the Balanomorpha. However, in the aforegoing, the balanoid rather than chthamaloid affinities of the Bathy- lasmatidae were emphasized, and while the Tetra- clitidae was recognized as a distinct family, it was placed rather closer to the Balanidae than the Chthamalidae, with the "elminoids" standing in a somewhat intermediate and ques- tionable position (Newman and Ross, 1971:143). Ross (1970:9) provided the solution to the last problem by demonstrating that at least two species referred to Elminius by previous authors were in fact tetraclitids rather than balanids. Hence the difficulties posed by the elminoids evaporated and the four famiUes of the Balano- morpha became more sharply defined. The gulf between chthamaloids and balanoids is particularly great. The tetrachtids and bathy- lasmatids are envisaged here as more closely related to one another than to either the chthamaloids or the balanoids. Although the tetraclitids and bathylasmatids are separable, there is presently no reason to believe that the former have not evolved from the latter, and it is to this complex rather than the balanoids that we infer the coronulines and chelonibiines are most closely related. Thus, it remains pos- sible that the Balanomorpha is triphyletic; an artificial assemblage of three independently evolved sessile types (Fig. 3). If this were the case, sessility was achieved five times in the Thoracica: once in the Verrucomorpha, once in the Brachylepadomorpha, and three times in the Balanomorpha — all from comparable, but lepado- morph ancestors. Nonetheless, for the aforemen- tioned reasons, the Balanomorpha is retained here, even though it may not be a natural grouping. As a partial solution to this problem we propose that the families recognized here be distributed between three superfamiUes, the Chthamaloidea, the Balanomorphoidea, and the Balanoidea. Should polyphyly be documented in the future, one or more of these would of neces- sity become suborders. 17 EVOLUTION AND DIVERSIFICATION CHTHAMALOIDEA Darwin (1854b:486) commented that "... Catophragmus forms, in a very remark- able manner, the transitional link [between the Chthamalidae and the Lepadidae], for it is impossible not to be struck with the resemblance of its shell with the capitulum of Pollicipes. In Pollicipes, at least in certain species, the scuta and terga are articulated together — the carina, rostrum, and three pairs of latera, mak- ing altogether eight inner valves, are consider- ably larger than those in the outer whorls — the arrangement of the latter, their manner of growth and union, — all are as in Catophrag- mus. If we, in imagination, unite some of the characters found in the different species of Pollicipes, and then make the peduncle so short (and it sometimes is very short in P. mitella) that the valves of the capitulum should touch the surface of attachment, it would be impos- sible to point out a single external character by which the two genera . . . could be dis- tinguished." As Withers (1928b) noted, Pilsbry (1916) suggested an even nearer hkeness with the more speciaUzed Sciliaelepas, and this model was adopted by Newman et al (1969:R269, fig. 90). Darwin further noted that the trophi of chthamaloids are similar to those of lepado- morphs. The labrum is thick and bullate, and this is basically a lepadomorphan character. The tridentoid mandibles and the multiarticulate caudal appendages of the primitive chthamaloids are typical of the pollicipoid lepadomorphans, and it is the sum of these arthropodal struc- tures that separate the chthamaloids from other Balanomorpha. The first and second cirri are modified for cleaning the posterior net-forming pairs of particulate matter and transferring it to the mouth. In lepadomorphs, generally but one pair of cirri is so modified, but pollicipoids have modifications of the second and even the third pairs (Darwin, 1851b:313). Finally, the base of the penis is simple, without basidorsal point, as in all thoracicans except the Balanoidea. In general, the trophi and chaetotaxis are most con- servative throughout the lower chthamaloids and readily distinguish the entire stock from the re- mainder of the Balanomorpha. The facies simi- larity with pollicipoids is indeed most striking. Virtually nothing more could be asked for in a generalized ancestor for the higher Chthamaloi- dea than Catophragmus and Catomerus — all the essential parts are there. All that needs to be done is to modify the form, by loss or fusion of shell parts and loss or specialization of appendages and trophic structures, in or- der to produce the diversity of taxa presently observed within the superfamily (Fig. 4). Relationships between genera have been noted by various authors. Pilsbry (1916:291) took a somewhat Gruvellian approach, and arrayed them in phylogenetic order, primarily according to number of wall plates. He also divided the most species-rich genus, Chthamalus, into two groups based on the nature of the mandible. These were refined and named informally by Nilsson-Cantell (1921) as the quadridentoid Stellatus-group and the tridentoid Hembeh-group. Zullo (1963c) observed that the more gen- eralized tridentoid mandible of the Hembeli- group was the type common to more primitive chthamaloids and, coupled with differences in mode of shell reduction, proposed that the Chthamalidae be divided into three groups: the quadridentoid Chthamalus, Chamaesipho, and Octomeris, and tridentoid Catophragmus, Chionelasmus, and Euraphia, and the tridentoid Pachylasma. The Pachylasma-group included Hexelasma (Zullo, 1963a). This is essentially Pilsbry's (1916:291) classification. Pope (1965), in a most scholarly review, pointed out some problems with the tri- and quadridentoid aspects of the division and this will be returned to shortly. Although Utinomi (1968:36) avoided dealing with the problems that arise when using the mandibles as a key taxonomic character, he formally designated subfamilial divisions for what were essentially the Pilsbry-ZuUo group- ings: the Catophragminae (Catophragmus, Cato- merus, and Chionelasmus), the Chthamahnae (Chthamalus, Chamaesipho, and Octomeris), and the Pachylasminae (Pachylasma, Hexelasma, and Tessarelasma). To the Catophragminae one must add the late Cretaceous Pachydiadema Withers (1935); to the Chthamahnae, the Recent Tetrachthamalus Newman (1967) and Jehlius Ross (1971); and from the Pachylasminae, or rather from the Chthamaloidea in general, re- move Hexelasma and Tessarelasma (see Newman and Ross, 1971:142). We are otherwise in ac- cord with Utinomi 's groupings, but not as coordinate taxa (Fig. 4). The Catophragmidae comprises an ancient and generalized stock; there is a significant gap between it and the remaining subfamihes. The differences, aside from the supplementary 18 Catophragmidae CHTHAMALOIDEA Figure 4. Radiation of the Chthamaloidea: It seems unlikely that Chionelasmus and Pachytasma (the only deep-sea members of the superfamily) evolved from intertidal catophragmids {Catophragmus and Catomeris) whose trophi and anterior cirri are much more specialized. By default then, the extinct Pachydiadema becomes a more hkely candidate. It also seems unlikely, for the same reasons, that Octomeris gave rise to Pachytasma, or vice versa since the opercular valves of Pachylasma are already advanced. Finally, while it seems unlikely that Chionelasmus gave rise to six-plated euraphiines, the possibility cannot presently be ruled out. If higher balanomorphans arose from chthamaloids, workers since and including Darwin (1854b) consider that it would have been via a pachylasmine ancestor (see text for further discussion). 19 whorls of plates in the Catophragmidae, are the extremely primitive nature of the primary wall plates and the opercular valves. Even in Chionelasmus. where the supplementary plates have been reduced to but a single whorl, and the primary wall plates from eight to six, the primitive pollicipoid facies is retained. The jump from Catophragmidae to Chtha- malidae is wholly in "modernization" of the wall, the arthropodal structures remain essen- tially the same in the primitive Euraphiinae and Pachylasminae, as do the number of pri- mary wall plates. Whether catophragmines gave rise to these two subfamilies independently, or the apparently more generalized shallow water euraphian Octomeris gave rise to the deep-water Pachylasminae, cannot be resolved at this time. Although the arthropodal structures seem to be similar, it is evident by shell characteristics that the euraphiines and pachylasmines are not closely related. Zullo (1963c:190) emphasized that further advances in shell arrangement differ in the two groups. Consequently, it is clear that the pachylasmines attained a six-plated condi- tion by development of a compound rostrum, and the euraphiines by loss of the carino- laterals. The transition from Euraphiinae to Chthama- linae is clearly by way of Euraphia, and con- sists primarily of the first and only significant change in the trophic apparatus. This change, the development of the so-called quadridentoid mandible of Pilsbry and others, is probably an adaptation, along with the specialized setae (grapples or cards) on the anterior cirri, to life in the high intertidal, as suggested by Pope (1965:965). The important feature of the quadridentoid mandible is probably not so much that there are four teeth, or that the second and third teeth are commonly bifid, but that the inferior portion rather than forming an angle support- ing a group or tuft of spines, is drawn out into a relatively long straight comb. Neverthe- less, Pope (1965:27) questioned the taxonomic value of this character. For example, she stated that the finding of "large individuals of certain AustraUan species (Chthamalus antennatus: 49) in which normally 4-toothed species have devel- oped only 3 teeth, or conversely, of 3-toothed species [Euraphia withersi: 43) with 4 teeth, is going to make the drawing of distinctions between Zullo's generic groups somewhat difficult." While there are difficulties in placing a few species in one or the other of these two groups, they are minor, and Pope herself explains most of them away. There is some variation in the number of teeth in E. withersi, and Pope (1965:43) pointed out that the majority of specimens will be found to have three teeth, and under any circumstance, the inferior angle is pectinated, not combed. Thus there would appear to be no real difficulty here. And with regard to C. attennatus, Pope (1965:49) stated, "Some- times mandibles of the right and left sides may vary and while the left one may have a s^e//af US-pattern for its lower tip, the right may have a "hembeli" one. However, in indi- viduals with somewhat hembeli-\\\ie jaws, the small, fourth double tooth can be seen, thus enabhng the real affinities of C. antennatus with Chthamalus to be recognized." Pope (1965:58) goes on and provides further evidence that alleviates her own objection to the recognition of Euraphia as separate from Chthamalus. In C. malayensis "juveniles, or during regeneration in certain individuals, the lower tip of the mandible is reminiscent of the Hembeli pattern." She then (1965:59) notes that mandibles regenerating after having been dam- aged take on a euraphian form, and further- more, that it seems as though juveniles and regenerating C. antennatus have to pass through a euraphian stage during the development of their much toothed and highly complex man- dibles. The juvenile situation is clearly onto- genetic; it is indeed an ancestral euraphian reminiscence, as suggested by Pope, and that a regenerating Umb would have to repeat the process is not surprising. Therefore, the dis- tinction between mandibles in the two groups recognized by Pilsbry and used informally by Nilsson-Cantell seem not only to be useful taxonomically, but they aid in elucidating the evolution of higher chthamaHds. A combed stellatoid mandible is seen elsewhere only in some Tetraclitidae, which also develop specialized cirral setae and occur high in the intertidal (Ross, 1970). Despite the great age of the Chthamaloidea, the group has been relatively conservative, undergoing little diversification with regard to both structure and habitat. None (with the pos- sible exception of certain Pachylasma on crinoids) has formed an obligate symbiotic association. The catophragmoid facies, first appearing in rocks of late Cretaceous age, was apparently an adapta- tion to high energy conditions along the shore and must have been abundant and widely distrib- uted in the past. Extant species have restricted distributions in the austral region and the tropi- cal Americas. The most advanced catophragmid, Chionelas- mus, and the relatively generalized chthamalid Pachylasma are presently the only deep-water 20 members of the entire superfamily — all others are intertidal. Where Euraphia and Chthamalus occur together the former and more generalized occupies the higher reaches of the intertidal, the highest of all balanomorphs (Pope, 1965; Southward, 1964b). Littoral and shallow water habitats that would otherwise appear suitable for chthamaloids are occupied, presumably through competitive exclusion and other bio- logical interactions, by higher balanomorphoids and by balanoids. BALANOMORPHOIDEA The Balanomorphoidea, proposed here, en- compasses the Coronulidae, Bathylasmatidae and Tetraclitidae (Figs. 1 and 5). Taken together one finds a suite of fundamentally primitive or generalized characters, including 8 wall plates, membranous basis, generalized opercular plates, no basidorsal point on the penis, and a labrum and cirrus III of intermediate form. Until recently the Tetraclitidae occupied an uncomfortable position as a subfamily of the Balanidae (Ross, 1968, 1970), whereas certain species of the Bathylasmatidae had been placed at one time in the Balanidae and at another in the Chthamalidae before being recognized as constituting a distinct family (Newman and Ross, 1971). The suite of characters that unites the Tetraclitidae and Bathylasmatidae under the Balanomorphoidea is the same as that which prevents their being satisfactorily assigned to either the Chthamalidae or Balanidae. The same holds true for the coronulid Chelonibia. But in addition it has 8 wall plates, a con- dition that previously complicated understanding the evolution of Balanidae. Our proposed re- assignment of the coronulids to this super- family not only removes this difficulty, but also allows for further insights into the funda- mental organization and evolution of the balanomorphoids. The intermediate position of Hexelasma s.l. and related genera between Chthamalidae and Balanidae, appeared ideal in arguments for derivation of the latter (ZuUo, 1963c: 190). How- ever, it was shown (Bage, 1938; Newman and Ross, 1971:148) that the nature of the soft parts are not altogether intermediate, but rather possess many unique characteristics. Also, argu- ments requiring bathylasmatids as intermediate between chthamaloids and balanoids neglected the apparent eight rather than six-plated origin of the latter. Such arguments side-stepped what was considered a living representative of an early balanid, Chelonibia. At the same time. the bathylasmatids could not be considered directly derivable from chthamalids, and be- cause of Chelonibia they did not appear to be appropriate ancestors for the balanids. The obvious conclusion was that they must have had a separate origin, and probably then from a comparable pollicipoid lepadomorphan stock (Newman and Ross, 1971). The preparation of this revision afforded us the opportunity to take a fresh look at the matter. We found that the apparent, obstacle raised by Chelonibia was actually not a problem at all. As stated previously, and as will be given diagnostic documentation in the system- atic account to follow, Chelonibia and its aUies have hitherto been incorrectly placed among the Balanidae, and this has stifled our thinking on the matter. Once freed of this constraint the whole picture becomes simplified and emi- nently clearer. Chelonibia and other coronuhds appropriately fall in the Balanomorphoidea. Because of their extreme specialization as obligatory commensals of marine reptiles and mammals (Ross and Newman, 1967), what is known of the Coronuhdae, beyond Chelonibia, tells us nothing about the evolution of the higher Balanomorphoidea. It is the Bathylas- matidae that provides us with the data base from which further inferences can be drawn. The Bathylasmatidae form a natural group and we propose that it be divided into the subfamilies Bathylasmatinae and Hexelasminae (Fig. 5). Opercular valves are generalized in the former, and form a vertically oriented cone. In the latter, the opercular valves are more balanoid, and the plane of the scuta lies almost horizontal, across the orifice of the shell. Within the family, Hexelasma stands in an intermediate position between Bathylasma and Aaptolasma. However, it is more closely related to the latter and together they form the Hexelasminae. Many features in Aaptolasma herald the Tetraclitidae. The comparable form of the man- dible and labrum, the tendency for the third cirri to be antenniform, comparable opercular valves, and the peculiarity of the wall plates in being permeated by longitudinal chitin-filled tubes, are all characteristics that draw them together. In the original diagnosis of Aaptolasma, only a small number of differences could be assembled to distinguish the genus from Tetra- clita s. 1., but at that time no six-plated tetraclitids were known. However, it subse- quently became clear that Balanus (Austro- balanus) imperator Darwin was not just closer to Tetraclita than to Balanus, as Darwin (1854b:290) had recognized, but that it was a tetraclitid 21 BALANOMORPHOIDEA Figure 5. Radiation of the Balanomorphoidea: The CoronuUdae are specialized obligate commensals of large crustaceans, some fish, sea turtles and snakes, and marine mammals. The Tetraclitidae are, on the other hand, specialized for an intertidal existence. These two families apparently did not give rise to higher forms. If the Balanoidea arose from the Balanomorphoidea, as proposed here, it probably would have been via the hexelasmines, species of which are presently confined to the shelf (see text for further discussion). 22 (Ross, 1971:266). Thus a distinction based on the number of wall plates, between Hexelas- minae and Tetraclitidae, fails. What remains is that the tetraclitids have radii (at least fundamentally), cirri II and III commonly are armed with bipectinate and other complex setae, and the labrum is wholly non-bullate; all ad- vances above the more generalized bathylasma- tid plan. In Aaptolasma, the solid wall is permeated by strips of chitin in much the same manner as in certain tetraclitids (e.g. Epopella). All other tetraclitids have tubiferous walls whose charac- teristics provide the distinguishing features of the subfamilies. There is a marked correlation between ad- vances in specialization of appendages, shell wall, and bathymetry. The most generalized forms in the Bathylasmatidae occur at the great- est depths; in fact Tetrachaelasma, a close relative of Bathylasma, is the deepest known balanomorphan (2,300 m). Members of the Hexelasminae occur on the shelf between ap- proximately 100 and 1,000 m. All members of the Tetrachtidae on the other hand, hke most Chthamaloidea, are intertidal or restricted to very shallow water. The hiatus between the low intertidal and 100 m or so is exploited by the Balanoidea. The Balanomorphoidea (ex- cept Tesseropora sp. on Heliopora, and the coronulids), hke the Chthamaloidea, do not form obligate commensal relationships as do many members or groups of the Balanoidea. BALANOIDEA It has been tacitly assumed that the Bal- anidae s. I. had an eight-plated ancestry, as did the chthamalids (cf. Newman et al, 1969). Darwin (1854b) pointed out the tripartite ros- trum of the chthamahd Pachylasma, and of the presumed balanid Chelonibia. Runnstrom (1925) reported that the rostrum in Balanus balanoides formed ontogenetically by fusion of the rostro- laterals, and this has been interpreted as a re- duction in the tripartite origin of the balanid rostrum. However, subsequent workers have failed to confirm this finding in this or any other balanid, much less a balanomorph. Direct evidence of a tripartite rostrum is found in Pachylasma and in Chelonibia, but as already discussed, these genera fall near the stem of the Chthamaloidea and Balano- morphoidea, respectively, and are not directly involved in the origin of the Balanoidea. It follows then, that there is no evidence for a tripartite rostrum (eight-platedness) in the stem of the Balanoidea. Nonetheless, it is appropriate that we review arguments to the contrary. Zullo (1963c: 190), following Darwin and Pils- bry suggested that the balanoids stemmed from the "Pachylasma-group." While not specifying which genera the group contained, he included Bathylasma ( = Hexelasma, in part), and pos- sibly Bathybalanus, as did Pilsbry (1916:291, 328). At the time, inclusion of these two genera previously unknown to Darwin, made acceptance of the group as the stem from which the balanoids could have arisen more palatable, for not only did they have the proper type of rostrum but also the appendages were con- sidered to range from somewhat chthamaloid in Bathylasma to somewhat more balanoid in Bathybalanus. The labrum in Bathylasma, while not bullate as in chthamaloids, is relatively thick and lacks a deep median incision. Also, the third cirri are somewhat intermediate between the second and fourth pairs. The situation in Bathybalanus was thought to be comparable, although more balanoid. However, we have shown that Bathybalanus is in all respects a true balanid and that Bathylasma, while not a balanoid, is not a chthamaloid either (Newman and Ross, 1971:142). Furthermore, the Pachylasma-Bathylasma-Bathybalanus-Balanus s.l. transition from the chthamaloids to the balanoids by-passed Chelonibia, previously con- sidered the only eight-plated balanoid. The problem of Chelonibia was removed in the pre- ceding section of this paper, where it was shown that Chelonibia and its alhes were primitive balanomorphoids rather than balanoids. We are left then with the prospect that the principal balanoid groups descended from balano- morphoidans rather than chthamaloids. Early balanoids had a solid wall, as borne out by both fossil and ontogenetic evidence. The evolution of higher balanoids has in good part centered around the development of a com- plex wall, an evolutionary advance not achieved to any comparable degree in the chthamaloids (Darwin, 1854b), but paralleled in many re- spects in the higher balanomorphoids. At this point it is not difficult to envisage the Bal- anoidea as having descended from hexelasmine- Uke balanomorphoid ancestors, since the trends are already beginning there: comparably con- structed wall of six plates, labrum thin and broadly notched, third cirri somewhat modified as maxillipeds, and balanoid opercular parts. We include three families in the Balanoidea. The solid-walled forms, those included in Semibalanus, and those having irregular wall tubes of the non-balaninae type, such as found in Archaeobalanus, differ so markedly in wall 23 Archaeobalanidae BALANOIDEA Figure 6. Radiation of the Balanoidea: A few of the more generalized balanoids, such as Bathybaianus. are found in deep water. But most free-living forms occur in relatively shallow water, and in the intertidal (Semibalaninae and Balanidae) where upper limits tend to set the lower limits of the chthamahd zone. Archaeobalanines, on the other hand, are usually subtidal and many have formed obligate commensual relationships (i.e. Conopea on gorgonians, Acasta on sponges, Hexacreusia, etc, on scleractiniansl. It is from the archaeobalanines that the Pyrgomatidae, occurring on scleractinians (one exception, on sponges), are inferred to have been derived, Hkely polyphyleticaUy (see text for discussion). 24 structure from the Balanidae s.s., that we relegated them to two separate families — the Archaeobalanidae (including the Archaeo- balaninae and Semibalaninae) and the Pyrgo- matidae (including the Pyrgomatinae s.s., Bosciinae and Ceratoconchinae). Thus arranged, the archaeobalanids, which first appear in the Eocene, are envisaged as having stemmed from six-plated hexelasmine bathylasmatids or bal- anomorphoids. The Archaeobalanidae fall into two subfam- ilies, the more diverse Archaeobalaninae and the strictly intertidal Semibalaninae. The Archaeo- balanus-like forms with tubiferous walls have undergone the most marked diversification of any of the balanomorphs. They are well repre- sented in the intertidal even though the higher reaches have been left to the tetraclitid balano- morphoids and most chthamaloids. The semi- balanines which may have an Actinobalanus ancestry, apparently did not give rise to any higher taxa. Two families stem from the Archaeobala- ninae. They are fundamentally the solid-walled Pyrgomatidae and the tubiferous-walled Balani- dae. The Pyrgomatidae encompasses the coral barnacles and, while the monophyletic origin of the group is in question (Withers, 1929a; Ross and Newman, 1973; Newman and Ladd, 1974), the consensus is that some, particularly those contained in the principal subfamily, the Pyrgo- matinae, and possibly the Bosciinae, have descended from Armatobalanus (Zullo, 1969b, 1967:127; Ross and Newman, 1973). The Cerato- conchinae apparently had a different and ap- parently non-armatobalanid origin (Newman and Ladd, 1974). The Balanidae, as envisaged here, may have stemmed from an irregularly tubiferous-walled ancestor having a calcareous basis such as Archaeobalanus. In the Balanidae the principal evolutionary advance was the establishment of a regular tubiferous wall in conjunction with an in- tricate dovetailing between the marginal portion of the internal ribs of the wall and the margins of the basis, thereby enabling an individual to continue to grow diametrically while maintaining a strong mechanical interlock with the sub- stratum (Newman et al, 1967). Perfection of this system, including delayed apphcation of an inner lamina to the internal ribs of the wall, produced the unique tubiferous structure dis- tinguishing balanids from all other Balano- morpha. Tubiferous walls occur in other Bal- anomorpha (Pyrgomatidae, Semibalaninae, and Archaeobalaninae among the Balanoidea, and the Coronulidae and Tetraclitidae among the Balanomorphoidea (Darwin, 1854b; Newman et al, 1967; Ross and Newman, 1967; Ross and Newman, 1973), but differences in ontogeny and the nature of the resultant structures indicate separate origins. The Balanidae is the most diverse family, and Pilsbry (1916:78 et seq.) began to group species of Balanus s.s., informally, into eight "series." However, he did not follow through with the matter in his monograph, and today only the "Series of B. amphitrite" is commonly referred to in the literature. We have at- tempted to follow Pilsbry s lead, and have ar- ranged the species of Balanus in six more or less natural groups. While some of these are readily recognizable by a number of characters, others have been assigned on the basis of un- defined facies similarities. Thus, while some of the groups may eventually become genera or subgenera, such a proposal at the present would be premature. Those species that we could not readily assign to one group or another are placed incertae sedis, at the end of the catalogue. A considerable part of the diversification of the Balanoidea has come about through establishment of obhgate symbiotic relationships verging on, but in only one case becoming wholly parasitic (Hoekia on the coral Hydno- phora, Ross and Newman, 1969). If the present epoch goes down in the fossil record as the "Age of Barnacles," as suggested by Darwin (1851a:5), it will in good part be due to the remains of symbiotic as well as free-living forms. MORPHOLOGY The figures appearing on the following ten pages illustrate various features of the shell and appendages of balanomorphans. The figures are arranged sequentially, beginning with the shell and ending with the appendages. In those figures where comparisons are made, the arrangement is essentially phylogenetic. 1 25 Thoracic limbs Tergum Lateral Carinolateral Anterior cirri Posterior cirri Carina Penis Anus Tergal depressor muscles Branchia (right) Mantle cavity- Oral cone Scutum Lateral Scutoral adductor muscle Rostral sinus Rostrum Prosoma Aperture to maxillary gland Female genital aperture Oviduct Rostral depressor muscles Ovaries / Lateral depressor muscles \ Ovaries Mantle cavity lining Membranous basis A. B. C. Posterior net-forming cirri Anterior cirri (maxillipeds; Tergum Scutum Tergoscatal flaps Opercular aperture Orifice of shell wall Carina Carinolateral Lateral Figure 7. Model of Semibalanus balanoides (L.): A and B, viewed from left side; C, viewed from rostral end (frontal aspect). In A, the left carinolateral and lateral wall plates as well as the left tergum and scutum have been removed revealing the in- terior of the mantle cavity containing the body of the animal as it resides when withdrawn. B, as A, but with the missing parts replaced and the cirri extended. The posterior three pairs of cirri (in Balanoidea and some Balanomorphoidea) form the cirral net while the anterior three pairs act primarily as maxillipeds. In C, it can be observed how the cirral net is formed and how the anterior cirri are positioned to aid in transferring food from it to the oral cone. Photographs courtesy of the American Museum of Natural History. 26 max' Figure 8. Principal anatomical relationships: A. A balanomorph montage*, viewed from the right side, with right cirri extended from aperture formed between the occludent margins of the opercular valves, primarily the scuta. The six cirri are always biramous. The posterior three form the right half of the plankton-capturing cirral net, while the anterior three are reduced and otherwise modified, primarily as "maxiUipeds," for removal of food from the cirral net (cf. Figs. 14-161. Cirri are extended by circulatory hydrostatic pres- sure and withdrawn by retractor muscles. B. The tentorial operculum, composed of paried terga and scuta, attaches along its basal margin to the lower margin of the sheath and is operated by three principal pairs of longitudinal depressor muscles, a transverse adductor between the scuta, and circulatory hydrostatic pressure. C. and D. Exploded operculum illustrating scuta and terga respectively, (am, insertion of adductor muscle; rd, insertion of rostral depressor; Id, of lateral depressor; td, of tergal lateral depressor). E. Body torn free from its attachment in the operculum and surrounding mantle (carapace), exposing the adductor muscle (a), the oral cone or labrum surrounding mouthparts (6), the pedicles and proximal portions of the right cirri, the penis (c) originating between the sixth cirri and resting for the most part between the pedicles of the adjacent pairs, and the right caudal appendage or ramus of the caudal furca (d). F. Oral cone enlarged, illustrating arrangement of trophi, from left to right: Labrum (/) with mandibular palps (p) attached to each side, followed by mandibles (m) and first and second maxillae (max', max"). G. Basal region of a balanid penis illustrating gross form of the pedicel (a) and basidorsal point or horn (6). *A fully bullate labrum and caudal appendages are characteristics of lower chthamalids. while much reduced third cirri and a penis with a basidorsal point are characteristics of balanitis (see subsequent illustrations). A pair of outgrowths of the interior mantle lining extends into the mantle cavity in which the body of the barnacle resides. These, termed branchiae, are variable in structure between taxa, but their taxonomic value is yet to be determined. They have been little used in systematic studies and consideration of them has not been included here. 27 Figure 9. The balanomorph wall; modifications of basic plan and nature of the basis: A. Wall of six solid plates; basis on left (not indicated) membranous, on right calcareous. In the latter, the basal margin of the wall may form some minor denticles, the older portions of which may appear as riblets on the interior of the wall, but the denticles form neither complex interdigitation with the basis nor anything other than very simple interlaminate figures in cross-sections of the wall (cf. Fig. 12A, B). B. As above, but with a "false basis" which may not, as in Euraphia intertexta, include the central portion of the membranous basis. C. Longitudinal sections of wall. Left, false basis, formed by successive layers of secondary calcification, in which fusion to the wall precludes further growth. Right, true basis indicating suture where marginal growth increments can occur. Var- iously thickened apical portions of wall (sheath) support the opercular valves. The sheath is ordinarily solid and its basal margin may become dependent (right). When a dependent sheath contacts ribs on the interior of the wall a type of tubiferous wall if formed, but the sheath does not constitute a true inner lamina (some coronulids and pyrgomatids). D. Tubiferous wall, in this case accompanied by a tubiferous basis. Well developed, uniformly deployed basal denticles form complex interdigitation with the basis which in turn is firmly cemented to the substratum. When, with growth, the inner por- tions of the denticles become secondarily fused, forming an inner lamina, the type of tubiferous wall seen here appears (Balanidae). If the denticles are simple, the interlaminate figures will be simple; if they have subsidiary lateral cusps, the interlaminate figures will be complex (cf. Fig. 12H, I). E. Longitudinal sections of wall. Left, a form with solid wall and basis where growth has been precluded by secondary calcification (false basis, as in some species of Euraphia). Right, a situation where transverse septa have developed in the tubiferous wall and basis, and where the cavity formed by the dependent sheath has become secondarily filled and/or cancellated. Aforegoing structural developments can occur in various combinations. 28 •^^^ Figure 10. The balanomorph wall; modifications of the basic plan. Fundamentally balanomorphs grow diametrically, increasing in height and basal width by depositing new shell around the basal parietal margins, and the size of the aperture is increased by additions to the lateral parietal margins to varying degrees (Darwin. 1854b). When lateral increments are negligible or ab- sent, the aperture is often enlarged by corrosion, as in Tetraclita. Other variations in the fundamental plan are illustrated here. A-C. Alterations in growth in gregarious species due to crowding. A. Pattern in forms such as Semibatanus balanoides and Balanus glandula (without or with carcareous bases respectively) where normally conical forms become columnar through elongation of the parietes. B. Alternative response to crowding, as seen in species of Megabalanus and members of the concavus group of Balanus. where elongation is primarily accompHshed by the formation of a cup-shaped basis. The basis may be permeated by one or numerous rows of tubes. C. Situation in some species producing a cup-shaped basis, such as some species of the concavus group and in Balanus laevis (illustrated), where the extensive cavity formed by elongation of the basis becomes secondarily transversely septate (cancellate or cystose). D. Growth in symbiotic forms, such as Acasta imbedded in sponges and Conopea (illustrated) occurring on gorgonians, in which a cup-shaped basis is formed. In the former it apparently assists in maintaining the apertural end of the barnacle at the surface of the growing sponge and (or) in enlarging the body chamber without forcing the wall above the surface of the sponge. In the latter, it elevates the barnacle well above the general surface of the gorgonian, the "keel" of its boat-shaped basis attaching firmly to the gorgonian axial skeleton. E-G. Coral barnacles keep pace with the surface of the coral, generally by elongation of the basis. E. As seen in species of Armatobalanus and Boscia, where elongation of the basis is not extensive and growth of the wall elevates the barnacle above the surface of the coral. F and G, where elongation is extensive and the wall plates grow so as to remain more or less flush with the coral surface, as in Eoceratoconcha and most members of Ceratoconchinae and Pyrgomatinae. In Eoceratoconcha and an early species of Ceratoconcha, the chamber formed by the basis is canceUate (F). while in most members of the Pyrgomatidae it is open (G). 29 radius Figure 11. The balanomorph wall; parts and relationships of plates (schematic): A. Exploded eight-plated wall viewed from the right side. The plates are named, from left to right, the rostrum (R), paired rostrolaterals, laterals and carinolaterals (RL, L and CL respectively! and the carina (C). The central triangular portion of each plate is termed the paries (pi. parietes). The basal margin (blackened portion) contacts the substratum. Contacting surfaces between adjacent plates are stippled, and the portion seen from the exterior is termed the ala (pi. alae). The parietal margin overlapping an ala may develop a lateral portion which fills the space between it and the adjacent paries. This structure is termed a radius (pi. radii). Parietes can be sohd or permeated by longitudinal tubes; radii (except in Megabalanus and some Tetraclitidae) and alae are always solid. It can be observed that the rostrum and carina have alae, the rostro- laterals have radii on both margins while the laterals and carinolaterals have alae on their rostral and radii on their carinal margins. B. An articulated eight-plated wall (as in lower Catophragmidae and Chthamalidae). C. Eight-plated wall in which the rostrolaterals have become inseparably but discernibly fused to the rostrum forming a "compound rostrum" (as in some species of Pachylasma and in Chelonibia). A true rostrum has alae and is overlapped by adjacent plates, while a compound rostrum has radii and overlaps adjacent plates. D. Compound rostrum where fusion demarcations are no longer discernible. May consist of fused rostrolaterals and rostrum, or fused rostrolaterals alone (see text for discussion of divergent views). 30 I \ ^-'^ t, yl^ Conopea galeata B Solidobalanus hesperius laevidomus Semibalanus cariosus Balanus glandula Megabalanus californicus Megabalanus californicus Figure 12. Wall structure in some Balanoidea. See caption on page 35. 31 D Octomeris sulcata A Catomerus polymerus B Chionelasmus danvini C Pachylasma scutistriatum E Euraphia hembeli F Euraphia aestuarii G Chthamalus fragilis H Bathylasma corolliforme I Aaptolasma americanum J Austrobalanus imperator K Tetraclitella divisa L Tetraclita rufotincta M Armatobalanus nefrens N Balanus niveus O Megabalanus psittacus P Nobia grandis Figure 13. Opercular plates of the Balanomorpha. See caption on page 35. 32 A Chionelasmus darwini '"'X^.^J^ B Euraphia intertexta C Tetrachthamalus oblitteratus D Chionelasmus darwini E Euraphia intertexta F Tetrachthamalus oblitteratus Figure 14. Trophi and cirri of the Chthamaloidea. See caption on page 35. 33 A Chelonibia patula B Bathylasma corolliforme C Aaptolasma leptoderma D Epopella breviscutum E Chelonibia patula \y ^11 iiix-'v VI F Bathylasma corolliforme / G Aaptolasma leptoderma H Epopella breviscutum III I Tesseropora pacifica Figure 15. Trophi and cirri of Balanomorphoidea. See caption on page 35. 34 A Solidobalanus pentacrini B Balanus amphitrite C Balanus laevis D Hoekia monticulariae G Megabalanus psittacus Armatobalanus terebratus / J Armatobalanus allium Figure 16. Trophi and cirri of Balanoidea. See caption on page 35. K Balanus nubilus 35 Figure 12. Wall structure in some Balanoidea. AH, transverse thin sections: I, photograph of basal margin. Increments resulting in vertical growth of the shell are due to deposition of new sheU along the basal margin of the plates. In primitive forms lacking a calcareous basis (most Chthamaloidea and the lower Balanomorphoidea and Balanoidea) transverse sections reveal little complexity in gross structure. With the advent of a calcareous basis there is an opportunity for a complex suture to form, interlocking the wall to the substratum through the basis. In solid wall forms the interlocking is generally accomplished by a regular array of simple denticles, the development of which is that of planar mineraUzed entities along centers of calcifi- cation, and these are visible as simple interlaminate figures in the older portion of the shell (A and B). If subsidiary denticles are produced perpendicular to the main denticle (as in I), the interlaminate figures wiU be arborescent (in solid walled forms as in C: in tubiferous walled forms as in E, G and HI. Some species without calcareous bases have tubiferous walls, and transverse sections commonly appear as in D. Some basically tubiferous walled species with calcareous bases have given up denticle formation and have all but completely filled irregularly formed tubes (F). Figure 13. Opercular plates of the Balanomorpha: A-G, Chthamaloidea; H-L, Balanomorphoidea; M-P, Balanoidea (all right terga and scuta, viewed from within). In the chthamaloids, terga tend to be triangular in outline (without spur, except in higher forms hke Chthamalus fragilis |G| where a rudimentary spur is developed), scuta never develop a strong adductor ridge, and the terga and scuta of each side tend to be deeply articulated especially in shallow-water forms (A and D-G). The situation in the balanomorphoids is somewhat intermediate between that seen in the chthamaloids and lower balanoids; a tergal spur is variously developed, an adductor ridge becomes prominent in higher forms (J-L) and the plates of shallow water forms are less deeply articulated. (In the first two superfamilies the tergum is never beaked and a spur furrow, where developed, is always open.) Lower balanoids tend to resemble higher balanomorphoids except that the adductor ridge is not particularly strong and the insertions of the scutal depressor muscles are simple. Closiu-e of the spur furrow (a result of the shaft of the spur becoming virtually internal), occasionally accompanied by production of a beak (O). apparently develops independently in various lines (within Semibalaninae, members of the Balanus concavus group, and Megabatanus). Partial or complete fusion of terga and scuta of each side occurs in all three superfamilies, but marked alterations in general form occur primarily in the coral sym- bionts (Pyrgomatinae, P). The whale-turtle symbionts (coronuUds) have reduced the opercular plates, and in Xenobalanus they have been lost completely. Figure 14. Trophi and cirri of the Chthamaloidea: A and D, Chionelasmus darwini; B and E, Euraphia intertexta: C and F, Tetrachthamalus oblitteratus. Trophi of lower chthamaloids are similar to those polUcipoid scalpellids — labra are buUate with crests variously concave but without a median notch (A and B); the mandibular teeth may have spinous superior margins (B); and the cutting edges of the first maxillae are usually stepwise or notched. In Chthamalinae (C) the mandibular teeth are never spinose, the second and third teeth are frequently bifid, a fourth bifid tooth is developed and the inferior portion is drawn out into a straight comb with the inferior angle supporting but a few sptnules, and the cutting edge of the first maxillae tends to be straight and slightly notched. The third cirri in general tend to resemble the fourth more than the second (E and F) but in Chionelasmus (D) even the second are more similar to the posterior ones. SpeciaHzed setae, ranging from bipectinate (E) to pinnate (F) are generally found on the second cirri. Posterior rami of the third cirri may be antenniform (F). apparently seasonally in intertidal forms. The caudal appendages or furca, a pair of uniramous appendages attached near the bases of the sixth cirri, and commonly found in lepadomorphans, are known in a few chthamaloids (D). Figure 15. Trophi and cirri of Balanomorphoidea; A and E, Chelonibia patula; B and F, Bathylasma corolliforme: C and G, Aaptotasma leptoderma: D and H, Epopella breviscutum; I, Tesseropora pacifica. Labra of balanomorphoids are similar to those of chthamaloids in being thick (although not bullate) and with variously concave crests (although there is a tendency to form a shallow notch). In Chelonibia (A) the labrum is distinctly notched and multidenticulate, in a manner reminiscent of Balanus amphitrite (Fig. 16 B). Mandibles of lower forms (A-C), in generally having four major teeth and pectinate inferior angles, are similar to lower balanoids (Fig. 16, A|. In higher tetrachtines (D) the inferior portion becomes combUke, much as in higher chthamaloids (Fig. 14, C), apparently an adaptation to life in the high intertidal. The first maxillae are essentially balanoid. The third cirri resemble the fourth more than the second (E-G), as in chthamaloids, or one or both rami are antenniform or bear specialized serrate setae (F, H and I). Figure 16. Trophi and cirri of Balanoidea. A and E, Solidobalanus (Bathybalanus) pentacrini; B, Balanus amphitrite amphi- trite; C and F, Balanus laevis; D, Hoekia monticulariae; G, Megabalanus psittacus; H, Balanus amphitrite inexpectatus; I, Armatobalanus (Armatobalanus) terebratus. Acasta conica and Acasta nitida respectively; J, Armatobakmus allium, K, Balanus nubilus. Labra of balanoids are generally thin and deeply incised; mandibles tend to have molariform rather than pectinated or combed inferior portions; first maxillae are undistinguished (B and C). In primitive species (A), the labrum has but a shallow notch and the mandible, in having an incisiform inferior portion, resembles that of the lower balanomorphoids. Marked de- partures from this facies are seen in commensal forms such as the wholly parasitic coral barnacle, Hoekia (D). The third cirrus always more closely resembles the second than the fourth, even in primitive species (E), and its rami are never antenniform. Rather, it is the anterior ramus of the first cirrus that takes on antenniform characteristics in some higher forms (F and K). Anterior cirri become variously thickened and in species without markedly speciahzed setae or spines, the anterior margin of the articles may become markedly protuberant (G). Complex setae, as seen in many chthamaloids and higher balanomorphoids, are not found in balanoids. Conversely, the so-called furcate (H) and multifurcate types found in certain species of the group of Balanus amphitrite (Henry, 1973) have not been observed in the first two superfamilies. On the other hand, compUcated arrays of spines commonly develop in balanoids (I and J), in free living forms, but especially in commensals of sponges and corals where they may be used to clear the aperture and prevent overgrowth by the host. 36 COMPOSITION AND DEFINITIONS OF SUPRAGENERIC TAXA An abbreviated definition is given for all suprageneric taxa. Where appropriate, the type genus and related genera are indicated. For each genus, the author, date and page, and the number of fossil and extant species included are given. BALANOMORPHA Pilsbry (1916: 14) Thoracic cirripeds lacking peduncle; bilater- ally symmetrical shell composed of carina, rostrum, and one to three pairs of lateral com- partmental plates that may be variously fused or totally concrescent; opercular valves paired when present, with members of each pair separate, articulated or concrescent; hermaphro- ditic (a few species of Archaeobalaninae have complemental males). CHTHAMALOIDEA Darwin (1854b: 446) n. status Wall composed of rostrum and one to three pairs of laterals; rarely supplemented with one or more whorls of imbricating plates around basal margin; rostrum rarely compound; parietes solid; radii solid; internally wall lacks uniform ribs; articulation of opercular valves generally deep, articulating pairs occasionally secondarily cemented or calcified together; basis commonly membranous, when calcareous, solid, and not forming complex interdigitations with wall; labrum bullate; crest nearly straight or shallowly concave, but without medial incision; mandible tri- or quadridentoid, with teeth usually simple; inferior angle finely pectinate or coarsely serrate; cirrus III resembling IV more than II; cirrus II frequently with specialized terminal setae; cirri lacking specialized hooks and spines; anterior ramus of cirrus III occasionally antenniform; penis without basidorsal point; caudal appendages when present multiarticulate. CHTHAMALIDAE Darwin (1854b: 446) Wall of 8, 6, or 4 plates; lacking basal whorl of supplementary plates; mandible tridentoid or quadridentoid. PACHYLASMINAE Utinomi (1968a: 36) Wall of 8, 6, or 4 plates; wall sutures finely denticulate; rostrum compound or with weakly developed alae; scutum higher than wide: basis commonly calcareous; mandible tridentoid; commonly with caudal appendages. Genus: Pachylasma Darwin (1854b: 475), type genus, 9 spp. EURAPHIINAE n. subfam. (Group of C. hembeli. Nilsson-Cantell, 1921: 275) Wall of 8 or 6 plates; sutures often coarsely serrate; rostrum with well developed alae; scutum higher than wide; basis commonly calcareous; mandible tridentoid; generally lacking caudal appendages. Genera: Euraphia Conrad (1837: 261), type genus, 10 spp.; Octomeris Sowerby (1825: 326), 3 spp. CHTHAMALINAE Darwin (1854b: 446) (Group of C. stellatus, Nilsson-Cantell. 1921: 275) Wall of 6 or 4 plates; sutures usually finely denticulate; rostrum with well developed alae or rarely compound; scutum wider than high; basis membranous; mandible quadridentoid; teeth two through four commonly with subsidiary cusps; generally lacking caudal appendages. Genera: Chthamalus Ranzani (1817: 276), type genus, 24 spp.; Jehlius Ross (1971b: 269), 1 sp.; Tetrachthamalus Newman (1967a: 425), 1 sp.; Chamaesipho Darwin (1854b: 470), 3 spp. CATOPHRAGMIDAE Utinomi (1968a: 36) n. status Wall of 8 or 6 plates; having one or more basal whorls of supplementary plates; mandible tridentoid. Genera: Catophragmus Sowerby (1826: 328), type genus, 1 sp.; Catomerus Pilsbry (1916: 335), 1 sp.; Pachydiadema Withers (1935: 389), 1 sp.; Chionelasmus Pilsbry (1911: 82), 1 sp. BALANOMORPHOIDEA n. superfam. Wall composed of rostrum, carina, and one to two pairs of laterals; rostrum compound; parietes solid or tubiferous; when tubiferous often secondarily filled with chitinous and(or) calcareous material; radii solid or tubiferous; internal surface of compartments generally with- out uniform ribs; articulations between pairs of opercular valves generally shallow, valves never calcified together secondarily; basis commonly 37 membranous, when calcareous solid and not forming complex interdigitations with wall; labrum thick, weakly bullate; crest nearly straight or shallowly concave, frequently with median depression, rarely with medial incision; mandible quadridentoid; teeth simple or teeth two through four with subsidiary cusps; inferior angle finely pectinate or coarsely serrate; cirrus III resembling II more than IV or more or less intermediate between II and IV; cirri without speciahzed spines or hooks, but cirri II and III may be armed with specialized setae; rami of cirrus III normal, or inner, outer or both rami antenniform; penis lacking basidorsal point; caudal appendages lacking. CORONULIDAE Leach (1817: 68) Wall of 8 (rostrum discernibly tripartite) or 6 plates; plates of six-plated forms with or with- out a median longitudinal sulcus; parietes tubifer- ous; tubes formed between inner and outer lam- ina, between internal buttresses, or between ex- ternal ribs; interlaminate figures simple, dendritic or anastamosing; radii solid; basis membranous; opercular plates when present, reduced, not articulated and not occluding aperture. CHELONIBIINAE Pilsbry (1916: 262) Wall of 8 or 6 plates, each lacking a median longitudinal sulcus; opercular plates weakly articulated; terga well developed; borders of mantle not forming a hood over the cirri; one row of confluent wall tubes formed between irmer and outer lamina. Genera: Chelonibia Leach (1817: 68), type genus, 12 spp. EMERSONIINAE Ross (1967: 7) Wall presumably of 6 plates, each lacking a median longitudinal sulcus; several rows of vertically discontinuous wall tubes between inner and outer lamina. Genus: Emersonius Ross (in Ross and Newman, 1967: 7), type genus, 1 sp. CORONULINAE Leach (1817: 68) Wall of 6 plates, each lacking a median longitudinal sulcus; terga vestigial; opercular plates lacking in Xenobalanus; borders of mantle forming a hood over the cirri; single row of wall tubes formed by infoldings of outer lamina against the sheath. Genera: Coronula Lamarck (1802: 464), type genus, 8 spp.; Cetopirus Ranzani (1817: 276), 1 sp.; Cetolepas Zullo (1969a: 17), 1 sp.; Cryptolepas Dail (1872: 300), 2 sp.; Tubicinella Lamarck (1802: 461), 1 sp.; Xenobalanus Steenstrup (1851: pi. 3), 1 sp. BATHYLASMATIDAE Newman and Ross (1971: 138) Wall of 6 or 4 plates; parietes solid and lack- ing regular internal ribs, or with chitin-filled longitudinal tubes arranged in a single row; plates lacking radii; inferior margin of mandible commonly pointed, bearing a few small spines; all cirri lacking specialized setae; one or both rami of cirrus III and occasionally cirrus II may be antenniform. BATHYLASMATINAE n. status Wall of 6 or 4 plates; wall not permeated by tubes; basis membranous, but inner shelf may form by secondary calcification; scuta oriented essentially perpendicular to basis; tergum lack- ing distinct spur; cirrus II resembhng III more than I. Genera: Bathylasma Newman and Ross (1971: 143), type genus, 3 spp.; Tessarelasma Withers (1936: 591), 1 sp.; Tetrachaelasma Newman and Ross (1971: 152), 1 sp. HEXELASMINAE n. subfam. Wall of 6 plates; permeated by chitin-filled tubes; basis calcareous; scuta oriented essentially parallel to basis; tergum with distinct spur; cirrus II resembling I more than III. Genera: Hexelasma Hoek (1913: 224), type genus, 3 spp.; Aaptolasma Newman and Ross (1971: 158), 5 spp. TETRACLITIDAE Gruvel (1903b: 160) Wall of 6 or 4 plates; parietes solid, or per- meated by chitin, or having one or more rows of tubes containing living tissue or secondarily filled with calcareous and chitinous material; radii well developed or obsolete, basis commonly membranous; inferior margin of mandible pecti- nate or coarsely serrate; cirrus II and III com- monly armed with specialized setae; inner or outer or both rami of cirrus III either normal or antenniform. 38 AUSTROBALANINAE n. subfam. Wall solid, or permeated by chitinous rods or lamellae; radii solid, narrow or obsolete. Genera: Austrobalanus Pilsbry (1916: 218 in part, ref. to B. imperator only),' type genus, 1 sp.; Epopella Ross (1970: 3), 3 spp. TETRACLITELLINAE n. subfam. Wall tubiferous; tubes never filled: radii tubiferous or solid, broad, well developed. Genera: Tetraclitella Hiro (1939e: 273), type genus, 10 spp.; Newmanella Ross (1969: 242), 1 sp. TETRACLITINAE Gruvel (1903: 160) Wall tubiferous; tubes commonly partly filled with chitinous and calcareous material; radii solid, narrow or obsolete: Genera: Tetraclita Schumacher (1817: 91), type genus, 18 spp.; Tesseropora Pilsbry (1916: 259), 5 spp.; Tesseroplax Ross (1969: 241), 1 sp. BALANOIDEA Leach (1817: 68) n. status Wall composed of rostrum, carina, and one to two pairs of lateral compartments, or wholly concrescent; parietes solid or tubiferous. when tubiferous rarely secondarily filled; radii solid or tubiferous; when basis calcareous internal sur- faces of compartments commonly with uniform ribs; basis commonly calcareous, solid or per- meated by tubes, rarely membranous; when calcareous commonly forming complex inter- digitations with wall; opercular valves occlude aperture; articulations between pairs generally shallow, or fused; labrum thin, never bullate; crest with pronounced medial incision; mandible quadri- or quinquidentate; second and following teeth with one or more subsidiary cusps; fifth tooth often vestigial; inferior angle commonly molariform; cirrus III resembUng II more than 'Darwin (1854b: 290) noted, on the basis of several shell characters and the nature of the third cirrus, that Balanus imperator was closer to Tetraclita than to Balanus. but he nonetheless assigned it to Balanus. Pilsbry (1916: 2181 pro- posed the subgenus Austrobalanus, with Balanus imperator as the type species. However. Ross (1971: 266) noted that imperator was not a Balanus. but a six-plated tetracUtid, and subsequent studies on arthropodal structures confirms this affinity; Austrobalanus imperator is assigned to the Tetraclitidae herein. This change necessitates erecting a new genus for the remaining three taxa originally assigned to Austrobalanus by Pilsbry. We propose Notobalfinus Ross, herein (Gr. notos. southern, and Balanus). with Balanus flos- culus Darwin, 1854b, as the type species, and assign this genus to the Archaeobalanidae herein. The species assigned to Notobalanus may be characterized as follows: shell small, non-tubiferous: inner basal surface bears irregular ridges; radii narrow; basis calcareous, and non-tubiferous; scutum with crests for insertion of lateral depressor muscle. IV; cirri usually without specialized setae, but not infrequently armed with specialized hooks and spines; rami of cirrus II or III never antenni- form; rami of cirrus I subequal or grossly unequal; lacking caudal apendages; penis with basi-dorsal point (rudiment thereof in Semibala- ninae). ARCHAEOBALANIDAE n. fam. Wall of 6 or 4 plates; parietes solid, rarely tubiferous; tubes uniformly or irregularly ar- ranged and formed between inner and outer laminae; when regularly arranged interlaminate fingers simple, hnear; radii solid; basis commonly calcareous, rarely tubiferous. ARCHAEOBALANINAE n. subfam. Wall of 6 or 4 plates; parietes solid or tubiferous; when tubiferous, tubes uniformly arranged in single row; interlaminate figures simple; basis calcareous or membranous, when membranous wall sohd. Genera: Archaeobalanus Menesini (1971: 9) type genus, 1 sp.; Actinobalanus Moroni (1967: 923), 7 spp.; Kathpalmeria Ross (1965a: 61), 2 spp.; Armatobalanus s. s. Hoek (1913: 159), 15 spp.; Armatobalanus (Hexecreusia) Zullo (1961b: 72), 2 spp.; Chirona s. s. Gray (1835: 37), 6 spp.; Chirona (Striatobalanus) Hoek (1913: 159), 8 spp.; Solidobalanus s. s. Hoek (1913: 159), 15 spp.; Solidobalanus (Hesperi- balanus) Pilsbry (1916: 192), 15 spp.; Solido- balanus (Bathybalanus) Hoek (1913: 230), 1 sp.; Notobalanus n. gen., 3 spp.'; Elminius Leach (1825: 210), 3 spp.; Membranobalanus Hoek (1913: 159), 7 spp.: Acasta Leach (1817: 69), 54 spp.; Conopea Say (1822: 323), 16 spp.; Pseudoacasta Nilsson-Cantell (1930b: 11), 1 sp.; Eoceratoconcha Newman and Ladd (1974: 387), 2 spp. SEMIBALANINAE n. subfam. Wall of 6 plates; parietes tubiferous; basally tubes irregularly spaced, not in discrete rows; interlaminate figures lacking; basis membranous. Genus: Semibalanus Pilsbry (1916: 182), type genus, 5 spp. PYRGOMATIDAE Gray (1825: 104) Wall of 4 plates or wholly concrescent; parietes solid or tubiferous; when tubiferous tubes occur between outer lamina and sheath, or between external ribs of wall; interlaminate figures complex, essentially arborescent; radii solid; basis calcareous, rarely tubiferous, mem- branous in Pyrgopsella. 39 PYRGOMATINAE Gray (1825: 102) Wall of 4 plates or wholly concrescent; oper- cular valves normal or modified; when normal, tergum with weakly developed lateral depressor muscle crests, or crests lacking; when shell con- crescent, sheath lacking paired sulci. Genera: Pyrgoma Leach (1817: 68), type genus, 1 sp.; Cantellius Ross and Newman (1973: 150), 17 spp.; Creusia Leach (1817: 68), 3 spp.; Hiroa Ross and Newman (1973: 153), 1 sp.; Hoekia Ross and Newman (1973: 161), 1 sp.; Nobia Sowerby (1823: no pagination), 6 spp.; Savignium Leach (1825: 210), 4 spp.; Pyrgop- sella Zullo (1967a: 123), 2 spp. CERATOCONCHINAE n. subfam. Wall of 4 plates; opercular valves normal; tergum with a single large crest for lateral depressor muscle. Genus: Ceratoconcha Kramberger-Gorjanovic (1889: 50), type genus, 21 spp. BOSCIINAE n. subfam. Wall wholly concrescent; opercular valves normal; tergum with feebly developed lateral depressor muscle crests, or crests lacking; sheath with paired sulci. Genus: Boscia Ferussac (1822: 145), type genus, 4 spp. BALANIDAE Leach (1817: 68) Wall of 6 or 4 plates; parietes tubiferous; tubes basically in single uniform row formed between inner and outer laminate although supplementary tubes may form basally; inter- laminate figures complex, arborescent; radii either solid or tubiferous; basis calcareous, commonly tubiferous. Genera: Balanus DaCosta (1778: 248), type genus, 131 spp.; Megabalanus Hoek (1913: 158), 49 spp.; Tetrabalanus Cornwall (1941: 227), 1 sp. 40 CATALOG OF SPECIES Superfamily Chthamaloidea Darwin, 1854, n. status Family Catophragmidae Utinomi, 1968 Genus Catophragmus Sowerby. 1826 Catophragmus imbricatus Sowerby, 1827, figs. 1-6 Synonymy DiAC.NOsis: Henry. 1958: 217. References: Broch, 1922:298 (as Catophragmus pilsbryi n. sp.); Darwin, 1854b:490: Gruvel, 1905a:196; Pilsbry, 1916:335, VerriU, 1901:22; Weltner. 1897:274. Distribution: Atlantic: Antigua, Bermuda; Pacific: Panama, Costa Rica. Genus Pachydiadema Withers, 1935 Pachydiadema cretaceum Withers, 1935:390 Distribution: Upper Senonian (Cretaceous), Ifo, Sweden (Withers 1953:103). Genus Catomerus Pilsbry, 1916 Catomerus polymerus (Darwin), 1854b:487 Synonymy diagnosis: Pope. 1965:16. References; Barnes & Klepal, 1971:79 (pedicel of penis); Broch, 1922:299, 301; 1927a:.506; Bennett & Pope, 1953: 105; 1960:182; Dakin et al, 1948:176; Endean et al, 1956:88; Gruvel, 1903b:lll; 1905a:195; Guiler, 1952:20; NUsson-CanteU, 1926:8; Pilsbry. 1916:336; Pope, 1945:356; Weltner, 1897:274; Wisely & BUck, 1964:162 (first stage naupUi); Womersley & Edmonds, 1958:217. Distribution: Southeast Australia. Genus Chionelasmus Pilsbry, 1911 Chionelasmus darwini (Pilsbry), 1907c:188. Synonymydiagnosis: Nilsson-Cantell, 1928b:446. Reference.s: Gordon, 1970:105; Nilsson-Cantell, 1938b:14; Pilsbry, 1911:82; 1916:335; Pope, 1965:10. Distribution: Hawau; Rodriguez Is., Western Indian Ocean; 450-460m. Family Chthamalidae Darwin, 1854 Subfamily Pachylasminae Utinomi, 1968 Genus Pachylasma Darwin, 1854 Pachylasma aurantiacum Darwin. 1854b:480 Synonymy diagnosis: Darwin, 1854b:480. References: Gruvel, 1905a:199; Weltner, 1897:273. Distribution: New South Wales, Australia. Pachylasma chinense Pilsbry, 1912:293 Synonymydiagnosis: Pilsbry, 1912:293. Reference: Pilsbry, 1916:329. Distribution: East China Sea; 400m. Pachylasma crinoidophilum Pilsbry, 1911:81 Synonymy: Utinomi, 1968a:24. Diaunosls: Pilsbry, 1911:81; Utinomi, 1968a;24. References: Kruger, 1911b:460; Nilsson-Cantell, 1932a; 14; Utinomi, 1958a:307. Distribution: Tokyo Bay to Kyusyu, Japan; 300-400m. Pachylasma daru'inianum Pilsbry, 1912:293 Reference: Pilsbry, 1916:329." Distribution: Sulu Arch.; 150m. Pachylasma ecaudatum Hiro, 1939b:52 Synonymydiagnosis: Utinomi, 1968a:31 (as Hexelasma ecaudatum). Distribution: Ogaswara I.; 200m. Pachylasma giganteum (Philippi), 1836:250 Synony.my DiAGNOSLS: Darwin, 1854b:477. References: Gruvel, 1905a:198; Kolosvary, 1942c;143; 1943a:77; 1951c:412; Pilsbry, 1916:329; Rehni, 1969:169; Stubbings, 1967:263; Weltner. 1897:273; Withers, 1953: 60,61. Di.stribution: Mediterranean (Sicily); West coast of Africa. Tertiary: Messina, Sicily. Pachylasma integrirostrum Broch, 1931:50 Distribution: Kei Is.; 140m. Pachylasma japonicum Hiro, 1933:65 Synonymy diagnosis: Utinomi, 1958a:22. Reference: Hiro, 1937c:430. Distribution: Southwest coast of Japan; 55-364m. Pachylasma scutistriata Broch, 1922:301 Synonymy diagnosis: Utinomi, 1968a:26. Reference: Nilsson-Cantell, 1927a:781. DisTKiBurioN: Southern Japan, South China Sea to S. Australia; 132-2050m. Subfamily Euraphiinae n. subfam. Genus Octomeris Sowerby, 1825 Octomeris angulosa Sowerby, 1825:244 Synonymy: Barnard, 1924:98. DiAONOSl.s: Darwin, 1854b:483. References: Barnes & Barnes, 1965a:391 (variation in egg size); Barnes & Klepal, 1971:79 (pedicel of penis); Gray, 1825:104 (as O. stuchburii n. sp); Gruvel, 1903b: 109; 1905a:197; Hiro, 1932b:478; Nilsson-CanteU, 1938b; 12; Pilsbry, 1916:334; Ritz & Foster, 1968:545 (tempera- ture responses); Sandison, 1954:69 (nauplii); Stebbings, 1910:575, Weltner, 1897:274. Distribution: South Africa. Octomeris brunnea Darwin, 1854b:484 Synonymy/diagnosis: Pope, 1965:20. References: Barnes & Klepal, 1971:79 (pedicel of penis); Gruvel, 1903b:110; 1905a;197; Hiro, 1932b:471; 1939e: 252 (includes discussion of O. intermedia): Nilsson- Cantell, 1921:303 (as Octomeris intermedia n. sp.); 1925: 1; 1930b:10; 1931a:108; 1932a:13; 1938b:33 (as O. inter- media): Utinomi, 1949a:25; 1954:22; 1958a:307; Weltner, 1897:274; Withers, 1932:123 (as O. crassa n. sp.). Distribiition: Southern Japan: Philippines; Indonesia; New Hebrides; Australia; Mergui Arch. Octomeris sulcata Nilsson-Cantell, 1932a:8 Synonymy: Utinomi, 1970:345. Diagnosis: Hiro, 1939e:254. References: Hiro, 1932b:471; 1939d:242; 1939f:207; Ooishi, 1964:195; Rosell, 1973b:75; Utinomi, 1949a:21; 1970:345; Utinomi & Kikuchi, 1966:5. Distribution: Southern Japan to Formosa. Genus Euraphia Conrad, 1837 Euraphia aestuarii (Stubbings), 1963b:7 Synonymy: Stubbings, 1967:257. Diagnosis: Stubbings, 1963b:7. References: Gauld, 1957:10 (as Chthamalus stellatus depressus): Kolosvary, 1941b:70 (as Chthamalus cirratus): 1943a:75 (as Chthamalus cirratus): Longhurst, 1958:32, 59 (as Chthamalus rhizophorae and C. withersi): Nilsson- Cantell, 1938a:177 (as C s. depressus): Sandison, 1967: 166 (naupliar stages); Utinomi, 1968b: 169. Distribution: West Africa. Euraphia apelloefi (NUsson-CanteU), 1921:292 Synonymy diagnosis: Nilsson-Cantell, 1921:292. References: Hiro, 1936d:229; Kolosvary, 1941b:70; Nilsson- 41 CanteU, 1926:1. DisTHiiunioN: Java. Euraphia calcareobasis (Henry), 1957:30 Rkkkrenik: Newman. 1961:148. Distribution: Tuamoto Is. Euraphia caudata (Pilsbry), 1916:315 Sv.NONV.MV DIAGNOSIS Pilsbry. 1916:315: Pope, 1965:35. Refekencks: Endean et al, "l956:88: Foster, 1974:42; Hire. 1937b:51; Kolosvary, 1941b:70; NUsson-CanteU, 1921:278. 296: 1930b:8: 1932d:3; Rosell, 1972:184; Stephenson et al, 1958:268; Zevina & Tarasov, 1963:84. Distribution: Australia; Philippines; Palau Is.; Indonesia. Euraphia depressa (Poli). 1791:27 Synonymy: Southward. 1964b:241. Diagnosis: Utinomi, 1959a:392. References: Barnes, 1956c:309 (biometry); Barnes & Barnes, 1964a:19 (exposure to air); 1964b:3 (distribution and ecology); 1968a: 146 (variations in egg production); Barnes & Klepal, 1971:77 (pedicel of penis); Carli, 1966a: 277 (mandible deformities); 1966b:115 (morphology and ecology); Darwin, 1854b:456; Gauld, 1957:10; Gruvel, 1905a:"211; Hammen, 1972:435 (lactate oxidation); Have & Have. 1954:330 (zonation); Kolosvary. 1939c:169; 1941b: 68; 1943:74; Monterosso. 1933:17 (morphology and biol- ogy); Nilsson-CanteU. 1938a:177; Pilsbry, 1916:17 (mor- phology and biology); Nilsson-Cantell. 1938a:177; Pilsbry, 1916:304; Ranzani, 1818:83 (as Chthamalus glaber n. sp.); ReUni, 1964:402; 1969:170; Riedl, 1963:2.56; Stubbings, 1963a:7; TenerelU, 1952:92 (biology); Utinomi. 1959a:382 (as Chthamalus stellatus maxima): Weltner. 1897:273. Distribution: Mediterranean: Gibraltar to Israel, Adriatic and Black Seas. Euraphia hembeli Conrad. 1837:261 Synonymy: Henry. 1957:29. Diagnosis: Pilsbry. 1916:324; Newman, 1961:145. References: Darwin, 1854b:465; Gruvel. 1905a:205 Gordon. 1970:107; Kolosvary, 1941b:70; Kruger, 1911a:4 1911b:460; Nilsson-Cantell, 1921:278, 290; Pilsbry, 1928 310; Weltner. 1897:272. Distribution: Hawaiian. Caroline, and Sunda Is.; Ceylon. Euraphia intertexta (Darwin) 1854b:467 Synonymy/diagnosis: Pope, 1965:29. References: Foster, 1974:39; Gordon. 1970:110; Gruvel, 1905a:206; 1912a:349; Hiro. 1936d:227; 1939e:251; Hoek. 1913:269; Kolosvarv. 1941b:70; Newman. 1961:143; Nilsson-CanteU. 1921:278; Pilsbry. 1916:324; 1928:310; Tokioka. 1953:123; Utinomi. 1949:21; 1954:22: 1968:169. Distribution: Indonesia north to Ryukyu and Tokara Is., eastward to Hawaii and Fitcairn I. Euraphia pilsbryi (Hiro), 1936d:227 Synonymy/diagnosis: Hiro, 1936d:227. References: Hiro, 1937c:429; 1938c:1687 (resistance to exposure); Kolosvary, 1941b:70, 76 (forma typica and neuseelandicus): 1943a:77; Ooishi. 1964:195; Utinomi, 1949a:21; 1954:21; 1958b:51; 1969b:51; 1970:345; Utinomi & Kikuchi. 1966:5. Distribution: Southern Japan. Euraphia rhizophorae (de Oliveira), 1940b:379 Synonymy/diagnosis: de Ohveira, 1941:26. References: Lacombe & Monteiro. 1974:633; Pope. 1965: 40; Stubbings. 1963b:ll. Distribution: Bahamas; Panama; Brazil. Euraphia withersi (Pilsbry). 1916:312 Synonymy/diagnosis: Pope. 1965:39. References: Barnes & Klepal. 1971:77 (pedicel of penis); Broch. 1931; 131; Hiro. 1937b:49: Karande. 1967:1245 (fouUng); Karande & Palekar. 1963b: 130 (breeding); 1966:148; Kolosvary. 1941b:70; Longhurst. 1958:59. 85 (C. aestuarii): Morton. 1973:491; Nilsson-Cantell. 1921: 295; 1930b:8: 1931a:107: 1938b:31; RoseU. 1972:182; 1973b:74; Stubbings. 1963b;ll: 1967:259; Utinomi. 1968b: 168; Zevina & Tarasov. 1963:83. Distribution: Mergui Arch.; Australia; Philippines; India; Madagascar. Subfamily Chthamalinae Darwin. 1854 Genus Chthamalus Ranzani, 1817 Chthamalus angustitergum Pilsbry. 1916:305 Synonymy/diagnosis: Ross. 1968:2; Southward. 1975:20. References: Barnes & Klepal. 1971:77 (pedicel of penis); Henry. 1954:444; Kolosvary. 1939c:161; 1941b:68; Mar- shall. 1953:435 (as C stellatus): Newell et al. 1959:209: Nilsson-Cantell. 1933:506; 1939a:3; Pilsbry. 1927:37; Smith et al. 1950:134; Stephensen & Stephensen. 1950: 389 (as C stellatus): 1954:80 (as C stellatus): Voss & Voss. 1960:102 (as C stellatus): WeUs. 1966:92 (as C. stellatus): Werner. 1967:70 (as C. stellatus). Distribution: Caribbean. Chthamalus anisopoma Pilsbry. 1916:317 Synonymy: Ross. 1962:8. Diagnosis: Pilsbry. 1916:317. References: Barnes & Barnes, 1965b:392 (variation in egg size); Henry, 1942:127; 1943:372; 1960:144; Kolosvarv. 1941b:70; Nilsson-Cantell. 1921:276. Distribution: Gulf of Cahfornia. Chthamalus antennatus Darwin. 1854:460 Synonymy diagnosis: Pope, 1965:45. References: Anderson, 1969:183 (embryology and phylogeny); Barnes & Klepal. 1971:77 (structure of the penis); Bennett & Pope. 1953:105; 1960:182; Broch. 1916:14; 1922:305; Dakin et al. 1948:176; Endean et al. 1956:88; Gruvel. 1903b:113; 1905a:203; 1911:292. 1912a: 349; 1920:52; Guiler. 1952:20: Kolosvary. 1941b:70; Nilsson-Cantell. 1921:277. 285; 1926:10; 1927a:781; Pils- bry. 1916:296 (footnote); Pope. 1945:3.56; Rosell. 1972: 174; 1973b:74; Utinomi. 1968b:170; Weltner. 1897:271; 1900:308; Wisely & Blick. 1964:163 (nauplii): Womersley & Edmonds. 1958:214 (ecology). Disthibution: Australia; Tasmania. Chthamalus antiquus PhiHppi. 1887:224 Synony.MY: Ortmann, 1902:250 (? = Balanus varians Sowerby). Distribution: Miocene, Chile. Chthamalus belyaevi Zevina & Kurshakova. 1973:187 Distribution; Easter Is.; southeast Pacific. Chthamalus challengeri Hoek. 1883:165 Synonymy: Hiro. 1932a:546. Diagnosis: Nilsson-Cantell. 1921:279. References: Barnes & Klepal. 1971:77 (pedicel of penis); Bhatt & Bal. 1960:439; Broch. 1927d:136; 1931:53 (as C challengeri forma krakatauensis nov.); 1947:5; Gruvel. 1903b:113; 1905a:203; Hiro. 1932b:469; 1935c:215. 227; 1937c:429; 1938c:1687 (resistance to salinity and insola- tion); 1939a:128; 1939f:207; Kolosvary. 194ib:70; 1943a: 75; Kruger. 1911a:46; 1911b:460; Luckens. 1968:75 (breeding and settlement); 1969:251 (breeding and settle- ment): 1970a:35 (predation and zonation); 1970b: 161 (seasonal distribution); Nilsson-Cantell. 1921:279; 1925: 23; 1927a: 781; 1932b:8; 1932e:2; 1938b:31; Pilsbry. 1916:307; Pope. 1965:52; Tarasov & Zevina, 1957:256; Utinomi. 1949a:21; 1954:25; 1958b:51; 1962:215; 1969b: 51; 1970:345; Utinomi & Kikuchi 1966:5; Weltner. 1897: 272, Zevina & Litvinova, 1970:174; Zevina & Tarasov, 1963:79. Distribution: Japan; Bonin Is.; Philippines; Indonesia; Indian Ocean; Red Sea. Chthamalus challengeri krakatauensis Broch. 1931:53 Synonymy: Hiro, 1939e:249 (= C. mora Pilsbry); Karande & Palekar, 1963a:231 (= C. malayensis). Chthamalus challengeri nipponensis Pilsbry, 1916:309 Synonymy: Nilsson-Cantell, 1921:279 (= C. c. challengeri). Chthamalus cirratus Darwin, 1854b:461 Synonymy/diagnosis: Pilsbry, 1916:321. References: Gruvel, 1903"b:113; 1905a:202; 1912a:349: Kolosvarv, 1941b:70; 1943a:75; Nilsson-CanteU, 1921 277; 1957:16; Pilsbry, 1909:71; Weltner. 1897:272: 1898b:6; 1900:305; Zevina & Kurshakova. 1973:183. Distribution: Chile; Peru; Ecuador. 42 Chthamalus dalli Pilsbry. 1916:316 Synonymy; Cornwall. 1955b:23. Diagnosis: Pilsbry. 1916:316: Henry. 1940a:17. Rkfkkencks: Barnes & Barnes. 1965a:392 Ivariation in egg size): Barnes & Conor. 1958:194 (neurosecretory cells): Barnes & Klepal. 1971:77 (pedicel of penis): Corn- wall. 1925:472: 1937:232: 19.50:318; 1953:76 (nervous system): 1955a:36: Dayton. 1971:351 (community organ- ization): Henry. 1942:121; Hiro, 1932b:469: 1935c:215; Kolosvary, 1941b:70: 1943a:76: Nilsson-Cantell. 1921: 277; Rice. 1930:249 (distribution in communities): South- ward & Southward. 1967:8 (biology); Stallcup. 1953:143; Tarasov & Zevina. 1957:256; Utinomi. 1970:345. DlsiKdUTiiiN: Unalaska to central California; northern Japan. Chthamalus dentatus Krauss. 1848:135 Synony.my DI.AC.Ndsis: Stubbings. 1967:252. Rkkkkencks: Barnard. 1924:97: Barnes & Barnes. 1965a; 392 (variation in egg size): Barnes & Klepal, 1971:77 (structure of the penis); Broch. 1924b:202; Darwin, 1854b:463: Day & Morgans. 1956:303: Gauld, 1957:10: Gruvel. 1903b;il3: 1905a:204; 1912a:345; Hoek. 1883:164; 1913:xvii; Kolosvary. 1941b:68; Millard. 1950:270; Mil- lard & Broekhuysen, 1970:298; Nilsson-CanteU. 1921:277, 282; 1931a:107; 1938a:176; Ritz & Foster. 1968:553 (temperature response): Sandison. 1954:94; Stebbing, 1910:574: Stubbings. 1961b:19; 1961c:183: 1963b:13 1964b:333; 1965:885; Utinomi. 1968b;169; Weltner. 1897:272. Di.sTRlBUTlON: West coast of Africa as far north as Cape Verde Is., southeastern coast of Africa north to Madagascar and Mauritius. Chthamalus fissus Darwin, 1854b:462 Synon"! .\iy; Ross. 1962:36. Diagnosis: Henry. 1942:121. Refkrenck.s: Augenfeld. 1967:92 (metaboUsm): Barnes & Barnes, 1958a:550: 1959h:516 (metabolism); 1965a:392 (variation in egg size); Barnes & Klepal, 1971:77 (struc- ture of the penis); Broch. 1922:308; ConneU. 1970:49 (predation); Gruvel. 1903b:113: 190.5a:202: Henry. 1943: 368; 1960:144; Kolosvary. 1941b;71: 1943a:75; 1947e: 361: 1951b:292; Nilsson-CanteU. 1921:276; Pilsbry. 1916 317. Weltner. 1897:273. DisrujiH I'Ion: San Francisco, south into Gulf of Cahfornia. Chthamalus fragilis Darwin. 1854b:456 Syn 1903b:136; 1905a:225; 1907b;l64; 1909b:25; 1920.. Hoek. 1875:59; 1909:271; Kolosv^ry, 1943a:87; 1947a:65 1951c:412; KrUger, 1940:464; Menesini, 1965:106; 1966 115; 1967b:220; 1972:40; Nilsson-Cantell, 1927a:784: 1938a:180; 1939c:93; ORiordan, 1967:294; Pilsbry, 1916 115; Relini. 1969:171; Seguenza, 1876:288; Southward & Crisp, 1963:30; Stabbing, 1910:568; Stubbings. 1961b: 32; 1961c:188; 1964b:327 (as B. dollfusi Broch); Weltner. 1897:263; Withers, 1953:61; ZuUo, 1966b:235. Distribution: Southwestern England; Portugal; Madeira; Azores; West and South Africa; Indian Ocean. Oligo- cene to Pleistocene, Mediterranean Basin; PUocene, England. Balanus spongicola pliocenicus Seguenza, 1876:443 Distribution: Tertiary, Italy. Balanus trigonus Darwin, 1854b:223 Synonymy/diagnosis: Pilsbry, 1916:111 (includes B. arma- tus MuUer, 1868:393). References: Barnard, 1924:68; Barnes & Klepal, 1971:83 (pedicel of penis); Broch, 1922:320; 1924b:202; 1931:60; 1935:1; 1947:6; Chilton, 1920:53; Cornwall, 1928:11; 1958:81; Cornwall, in Steinbeck & Ricketts, 1941:431. 433; Davadie, 1963:58; Dawydoff, 1952:128; Day & Morgans. 1956:303; deOUviera, 1941:15; Foster. 1967a: 82; 1967b:33 (early stages); Freiberger & Cologer. 1966; 881 (laboratory rearing); Gordon, 1970:86; Gruvel, 1903b: 136; 1905a:223; 1907a:105; 1907b;164; 1909b:25; 1912a:345,350; GuUer, 1952:20; Henry, 1941:104; 1942: 127; 1943:369; 1954:443; 1960:139; Hirano, 1953:139 (rearing and metamorphosis); Hirano & Okushi, 1952 639 (attachment and growth rates); Hiro, 1932a:551 1937c:439; 1938b:473 (on Macrocheira kaempfen); 1939e: 263; 1939f:210; Hoek, 1883:149; 1913:152; Hutton. 1879 330; Jennings, 1918:61; Kawahara, 1961:65; 1962:27 1963a:391; 1965:319 (fouling); Kolosvary, 1941d;210 1943a:86; 1947a:65; 1951c:411; 1955:184; 1959:197 1963a:173; 1963b;175; 1967b:392; KrUger, 1911a:49 1911b:460; 1940:468; Lacombe & Monteiro, 1974:633 Luckens, 1970c;510; Matsuda, 1973:41; Mawatari, 1967 99 (distribution of fouhng organisms); Mawatari et al 1962:93 (water conduit fouhng); Millard, 1950:266 Moore & McPherson, 1963:418; Moore, 1944:333 NUsson-CanteU, 1921:319; 1927a:784; 1928a;34; 1931a 111; 1938a:180; 1938b:13; 1939a:5; 1939c:93; 1957:10: Ortmann, 1902:252; Pilsbry, 1909:70; 1916:111; Pope 1945:361; ReUni. 1962:1; 1964:405; 1966:179; 1968a:219: 1968b:186; 1969:173; Rehni & Giordano, 1969:251 (set tlement); Resig, 1969:20; Ritz & Foster, 1968:551 (tem perature responses); Ross, 1962:22; 1964a:490; 1964b 271; Ross et al, 1964:313; Sandison. 1954:81; Skerman 1960:610 (predation of); Stubbings, 1936:41; 1940:390 1961b:31; 1963c:188; 1963b:21; 1964a:109; 1964b;341 1965:890; 1967:267; Tarasov & Zevina, 1957:166; UU nomi, 1949a:22; 1950:63; 1958a:294; 1962:216; 1968b 173; 1969a:88; 1969b:52; 1970:357; Utinomi & Kikuchi 1966:6; Weisbord, 1966:20 (cf. trigonus); WeUs, 1966:83 WeUs et al, 1964:567; Weltner, 1897:262; 1900:307; 1922: 85; Werner, 1967:64 (distribution and ecology); Wisely & BUck. 1964:164 (larvae); Withers, 1924:33; 1953:74 et seq.; Zevina & Litvinova, 1970:174; ZuUo, 1963a:122 {B. aethiops Philippi, 1887:224 probably B. trigonus). Distribution; Cosmopolitan in warm seas; distribution for the most part natural. Miocene; Europe, Africa and North America; Pliocene, Italy and Red Sea; Pleistocene Hawaii. Group of Balanus perforatus Balanus hystrix Hoek, 1913:218 Reference: Pilsbry, 1916:78. Distribution: Sunda I.; 40in. Balanus obtiquus Ross, 1964a:486 Distributio.n: Miocene, Virginia. Balanus pacificus Pilsbry, 1916:104 (= Balanus concauus pacificus) Synonymy: Ross, 1962:16; 1964a:489. Diagnosis; Pilsbry, 1916:104. References: Boolootian, 1964:185 (on Dendraster excen- tricus): Cornwall, in Steinbeck & Ricketts, 1941:432; CornwaU, 1951:328; 1956:647; 1958:84; 1959:406; 1962: 625; Darwin, 1854b:235 (in part, figs. 4a-c); Davadie. 1963:52; Giltay, 1934:1 (on Dendraster): Henry, 1942: 104; 1943:367; 1959:200; 1960:146; Hertlein, 1934:61; Kolosvary, 1955:185; Merrill & Hobson, 1970:595 (on Dendraster excentricus): NUsson-CanteU, 1957:6; Orcutt, 1921:24; PUsbry, 1907d:199 (as B. concavus - recent, Point Loma); 1909:67 (as B. concavus - fossU, Peru); Weltner, 1895:291 and 1897:261 (as Balanus tintinnabu- lum occator): ZuUo, 1969a: 10. Distribution: South of San Francisco to ChUe. PUo- Pleistocene of CaUfomia; Pleistocene of Magdalena Is.; fossil, Peru. Balanus pacificus brevicalcar Ross, 1964a:488 Reference: PUsbry. 1916:107,337 (as Balanus concavus pacificus forma brevicalcar); Ross, 1964a:488. Distribution: Newport, CaUfornia. Balanus pacificus prebrevicalcar Ross, 1964a:488 Distribution: Miocene, Virginia. Balanus perforatus Brugiere, 1789:167 Synonymy/diagnosis: PUsbry, 1916:123. References: Austin et al, 1958:497 (chromosome num- bers); Barnes & Barnes, 1965a:391 (variation in egg and naupUus size); 1966a:83 (ecological and zoogeographical observations); 1968a:146 (variation in egg production); 1974:197 (embryonic development and saUnity); Barnes & Crisp, 1956:636 (self-fertiUzation); Barnes & Klepal, 1971:83 (pedicel of penis); Barnes et al, 1970:70 (behav- ior on impaction); 1971:173 (spermatozoa); 1972:191; Bassindale. 1964:37; Bishop et al, 1957:9; Bocquet- Vedrine & Pochon-Masson, 1969:595 (spermiogenesis); CaiUiaud, 1865:38; Caziot, 1921:52; Ciurea et al, 1933:7, 16; Crisp, 1964a: 181. et seq. (effects of severe winter); Crisp & Patel, 1958:1078 (relationship between breeding and ecdysis); Crisp & Southward, 1961:271 (cirral activ- ity); Daniel, 1955c:22; Darwin, 1954b:231; Davadie, 1963:38; Davadie-Suaudeau. 1952:20; deAlessandri, 1895:279; 1907b:278; Ephrusi, 1922:141 (spermatozoa); Fischer, 1872:432; Fischer- Piette & Prenant, 1956:16; Grasse & Tuzet, 1928:1543 (spermatozoa); 1932:9 (sper- matozoa); Groom, 1894a;119 (early development); 1894b: 81 (hfe history); Groom & Loeb, 1890:160 (nauphar be- havior); Gruvel, 1905a:230; 1907d:6; 1912a:345; Hoek, 1909:271,283; 1913:158; Knight-Jones, 1953:585 (gregar- iousness); Kolosvary, 1943a:88; 1944:33; 1947a:14; 1947d:425; 1951b:292; 1951c:411; 1955:184; 1960a:591; 1963a:173,175; 1967b:392; Kruger, 1940:464; LeReste, 1965:64 (larva); Lochhead, 1936:429 (feeding mechanism of naupUus); Menesini. 1965:95; 1967b:217; Moore, 1936: 703; Moyse, 1960:120; Munn & Barnes, 1970b:261 (fine structure of spermatozoa); NUsson-CanteU, 1931a:112; Norris & Crisp, 1953:393 (distribution and planktonic 67 stages); Norris et al, 1951:444 (variability in larval stages); ORiordan, 1967:292; Patel & Crisp, 1960b:104 (rates of development of embryos); Prenant & Teissier, 1923:173; Pochon-Masson, et al 1969-1970:205; Relini, 1964:404; 1966:179 (fouling); 1968b:185; 1969:171; ReUni & Giordano, 1969:251 (vertical distribution); Riedl, 1963: 258; Seguenza, 1876:293; Southward, 1955a:1124 (feed- ing); 1955b:403 (cirral activity and temperature); 1963: 798 (hemoglobin); Southward & Crisp, 1963:29; Stub- bings, 1963b:30; 1964b:342; 1967:268; Tarasov & Zevina, 1957:193; Taylor, 1970:211 (frontolateral horns and glands); Weltner, 1898b:12; Withers, 1953:57 et seq.; Zevina, 1963:72. Distribution: Great Britain; France; Spain; Mediterra- nean; Black Sea; northwestern coast of Africa. Oligocene- Pleistocene, Europe and Africa. Batanus perforatus altavellensis Seguenza, 1876:446 Distribution: Tertiary, Italy. Balanus perforatus angustus (Gmehn), 1789 Synonymy: Darwin, 1845b:231. Diagnosis: Davadie, 1963:39. References: Broch, 1924b:204; 1927b:22; 1935:2; Gruvel, 1903b:136; 1905a:230; Kolosvary, 1942d:149; Nilsson- Cantell, 1931a:112; 1938a:180. Distribution: Great Britain; France; Spain; Mediterra- coast of Africa; Indian Ocean. Balanus perforatus chordatus Menesini, 1966:113 Distribution: Miocene, Italy. Balanus perforatus cranchii (Leach), 1818:pl. 57 Synonymy: Darwin, 1854b:231. Diagnosis: Davadie, 1963:39. References: Brown, 1844:121; Gruvel, 1905a:230; Mene- sini, 1965:101; Pilsbry, 1916:125; Weltner, 1897:264. Distribution: Pleistocene, Italy. Balanus perforatus fistulosus (Poli), 1791:22 Synonymy: Darwin, 1854b;231. Diagnosis: Gruvel, 1905a:230. References: Broch, 1927c:23; Nilsson-Cantell, 1931a:112; Vivi, 1938:111 (digestive tract); Weltner, 1897:264. Distribution: Denmark; Morocco; Canary Is. Balanus perforatus mirabilis Darwin, 1854b:232 Synonymy/diagnosis: Darwin, 1854b:231. References: Gruvel, 1905a:230; Pilsbry, 1916:125; Welt- ner, 1897:254. Distribution: RocheUe, France. GeTwis Megabalanus Hoek, 1913 Megahalanus ajax (Darwin), 1854b:214 Synonymy/diagnosis: Nilsson-Cantell, 1938b:34. References: Fischer, 1884:357; Gruvel, 1903b:126; 1905a 214; 1907b:164; 1909b:25; 1912a:350; Hoek, 1913:151 Kolosvary, 1956:189; 1959:197; Kriiger, 1940:464 Pilsbry, 1916:74; Weltner, 1897:262. Distribution: Indian Ocean; Philippines; Solomon Is.; New Caledonia; Japan. Miocene, Hungary. Megabalanus atgicola (Pilsbry), 1916:72 Synonymy: Utinomi, 1968b:170. Diagnosis: Pilsbry, 1916:72. Reference.S: Barnard, 1924:67 (includes var. costatus); Barnes &. Barnes, 1965a:391 (variation in egg and naup- hus size); Barnes & Klepal, 1971:81 (pedicel of penis); Dakin et al, 1948:176; Kolosvary, 1941a:43 (as B. algi- cola algicola, S. Africa; as B. algicola japonica. n. subsp. Japan); 1943a:80; 1947c:424 (as fi. algicola forma typica. Pacific; as B. algicola forma novarae n.f.. Pacific); Krii- ger, 1940:466; Millard, 1950:266; Nilsson-CanteU, 1939b: 236; Ritz & Foster, 1968:553 (temperature response); Sandison, 1954:80 (nauplii). Distribution: South Africa; found elsewhere on ships (AUen, 1953). Megabalanus antillensis (Pilsbry), 1916:63 Synonymy/diagnosis: Pilsbry, 1916:63. References: DePalma, 1963:15 (fouling); de Oliveira, 1941:14; Kriiger, 1940:471; Lacombe & Monteiro, 1974; 633; Nilsson-Cantel, 1928a:31; 1931a:109; 1939a:3; Pilsbry, 1927:38; 1953:24; Ross, 1968:18; Weisbord, 1966:13; WeUs, WeUs & Gray, 1964:567. Distribution: North Carolina to Rio de Janeiro. Megabalanus azoricus (Pilsbry), 1916:62 Reference: Stubbings, 1967:265. Distribution: Azores. Megabalanus califomicus (Pilsbry), 1916:65 Synonymy: Ross, 1962:10. Diagnosis: Henry. 1942:118. Reference: Aleem. 1957:51; Barnes & Klepal, 1971:79 (pedicel of penis); Boolootian, 1958:91; Broch, 1922:310: Bruff, 1946:234; Coe, 1932:63; Coe & AUen, 1937:126; CornwaU, 1951:324; 1959:405; Graham & Gay. 1945:382; Henry, 1943:367; 1960:138; Hewatt, 1946:194; Hughes, 1914:212; Johnson & Snook, 1927:264; Kanakoff & Emerson, 1959:20; Merrill & Hobson, 1970:613; Ras- mussen in Shelford, 1935:306; WiUett, 1937:383; ZuUo, 1968:1. Distribution: Monterey Bay to Cape San Lucas, Baja California; Guaymas, Mexico. Plio-Pleistocene of Cali- fornia and Baja California. Megabalanus campbelli (Filhol), 1885:487 Synonymy; Foster. 1967a:82. Diagnosis: Broch. 1922:310. References: Chilton, 1909:607; Gruvel, 1903b:128; 1905a: 214; Kruger, 1940:464; Linzey, 1942b:3; Pilsbry, 1916: 54; Weltner, 1897:276; 1900:305; Withers, 1924:27. Distribution: Campbell I.; Otago Peninsula, New Zealand. Megabalanus clippertonensis (Zullo), 1969c:501 Distribution: CUpperton I. Megabalanus coccopoma (Darwin), 1854b:196 Synonymy: Ross, 1962:9. Diagnosis: Henry, 1942:120. References: Broch, 1922:310; Davadie, 1963:26; Gruvel, 1903b:126; 1905a:212; Henry, 1941:102; 1973:983: Jordan & Hertlein, 1926:420; Kolosvary, 1943a:79 Kruger, 1940:472; Lacombe & Monteiro, 1974:633 Nilsson-CanteU, 1931a:109; Pilsbry, 1916:68; Weltner 1897:260. Distribution: Mazatlan, Mexico to Panama; Rio de Jan- eiro; Mauritius; China; New Caledonia. Pliocene, Baja CaUfornia. Megabalanus concinnus (Darwin), 1854b:196 Synonymy/diagnosis: Pilsbry. 1916:69. References: Barnes & Klepal, 1971:81 (pedicel of penis); Broch, 1931:56; Foster, 1967a:81; Gruvel, 1903b:126; 1905a:213; Hiro. 1936a:60 (commensalism); Jennings, 1918:61: Kolosvary. 1943a:79; Moore. 1944:333; Nilsson- CanteU. 1957:7; Stubbings, 1967:265; Weltner, 1897:260. Distribution: West coast of South America. Megabalanus costatus (Hoek). 1913:165 Distribution: HuU of "Siboga." Megabalanus crispatus (Schrbter). Darwin, 1854b:195 Synonymy/diagnosis: PUsbry, 1916:60. References: Barnes & Klepal, 1971:81 (pedicel of penis); Gruvel, 1903b:212; Stubbings, 1967:265; Weltner, 1897:261. Distribution: La RocheUe, Senegal; East Indies; on ships. Megabalanus cylindricus (Gmehn), 1780:3213 Synonymy: Holthuis & Sivertsen, 1967:44 (includes B. capensis EUis, 1758 and B. maxillaris Gronovius, 1763.). Diagnosis: Darwin, 1854b:209. References: Barnard, 1924:67; Davadie, 1963:33; Gruvel, 1903b:129; 1905a:218; Kolosvary, 1943a:90; 1943b:121; Kruger, 1940:466; Nilsson-CanteU, 1925:28; 1930c:254; 1939b:237; 1939c:93; Pilsbry, 1916:77; Ritz & Foster, 1968:533 (temperature response); Sandison, 1954:90 (naupUi); Stebbing, 1910:568; Stubbings, 1967:267; Weltner, 1887:101; 1897:261. Distribution: South Africa. Megabalanus decorus (Darwin), 1854b:212 Synonymy/diagnosis: Newman & Ross, 1971:176. 68 References Barnes & Klepal. 1971:81 (pedicel of penis) Broch, 1931:57; Chilton, 1909:607; 1911:311; CornwaU 1959:401 (as Balanus concavus paciftcus); 1960:831 FUhol. 1885:486; Foster, 1967a:81; Hutton, 1879:328: Gruvel, 1903b:126; 1905a:214; Jennings, 1918:60 Kriiger, 1940:464; Linzey, 1942a:279; 1942b:l (append- ages); Monod & Dollfus. 1932:71; Moore, 1944:333; Nilsson-Cantell, 1927a:784; Pilsbry, 1916:77; Skerman, 1958:224 (fouling); Weltner, 1897:261; 1899a:443; 1900: 307; Withers, 1924:25. Distribution: New Zealand, including Kermadec Is., Chatham I., Auckland Is.; subHttoral to 51m. Mio- cene and Pliocene, New Zealand. Megabatanus dollfusii (de Alessandri), 1907b:275 Distribution: Upper Miocene, France. Megabatanus dorbignii (Chenu), 1843 Synonymy/diagnosis: Darwin, 1854b:196. References: Gruvel, 1903b:126; 1905a:213; PUsbry, 1916: 71; Weltner, 1897:261. Distribution: On ship from Java. Megabatanus gatapaganus (Pilsbry), 1916:70 Reference: Hedgpeth, 1969:11 (as S. tintinnabutum). Distribution: Galapagos Is. Megabatanus giganteum (Kolosv^ry), 1949:190 Distribution: Miocene, Hungary. Megabatanus honti (Kolosvary), 1950b:l Distribution: Miocene, Hungary. Megabatanus hungaricus (Kolosvary), 1941:282 Distribution: ]\4iocene, Hungary. Megabaianus intermedius (Darwin), 1854b:196 Synonymy/diagnosis: Darwin, 1854b:196. References: Gruvel, 1905a:213; Pilsbry, 1916:71; Welt- ner, 1897:261. Distribution: ?Peru (Weltner). Megabatanus isotde (Holthius & Sivertsen), 1967:41 Reference: Nilsson-Cantell, 1939b:237 (as B. maxiltaris). Distribution: Tristan da Cunha. Megabatanus javanicus (Withers), 1923:282 Distribution: Miocene, Java. Megabaianus krakatauensis (Nilsson-Cantell), 1934b:53 Reference: Kriiger, 1940:464. Distribution: Krakatau, Sunda Strait. Megabatanus teganyii (Kolosvary), 1950:2 Distribution: Miocene, Hungary. Megabatanus muttiseptatus (Ross), 1964a:485 Distribution: Miocene, Virginia. Megabatanus nigrescens (Lamarck), 1818:391 Synonymy: Darwin, 1854b:210. Diagnosis: Pope, 1945:361. References: Barnes & Klepal, 1971:84 (pedicel of penis) CornwaU, 1960:829; Dakin et al, 1948:176; Davadie 1963:32; Endean et al, 1956:88 (ecology and distribu tion); Gruvel, 1903b:129; 1905a:218; Kolosvary, 1943a 81; KrUger, 1914:429; 1927a:13; 1940:464; Stubbings 1967:266; Weltner, 1897:241; Womersley & Edmonds 1958:232 (ecology). Distribution: Australia; elsewhere on ships. Megabaianus occator (Darwin), 1854b:196 Synonymy: Hiro, 1939e:260. Diagnosis: Kolosvary, 1950a:290. References: Borradaile, 1900:799; Foster, 1974:46; Gruvel, 1905a:213; Kolosvary, 1943a:78; Kruger, 1940: 471; NUsson-Cantell, 1938b:34; 1957:6; Nomura, 1938:87; Pilsbry, 1916:59; Utinomi, 1949a:25; 1954:22; Weltner, 1895:291; 1897:261; Zevina & Tarasov, 1963:88. Distribution: Indian Ocean; Indonesia; Fiji; Philippines; Formosa; Bonin Is. Pliocene, Ryukyu Is. Megabaianus peninsularis (Pilsbry), 1916:66 Synonymy/diagnosis: Pilsbry, 1916:66. References: Henry, 1941:102; 1942:127; 1943:367; 1960: 146; Kolosvary, 1943a:78; Nilsson-Cantell, 1927a:783 (= M. volcano). Distribution: Cape San Lucas, Baja California; Acapulco, Mexico. Megabatanus plicatus (Hoek), 1913:165 Distribution: Hull of "Siboga." Megabatanus psittacus (Molina), 1782 SvNONY.MY.DlAGNOSis: Pilsbry, 1916:75. References: Bahamonde, 1958:214; Chapman, 1914:53 67; Darwin, 1854b:207; Gruvel, 1903b:129; 1904:103: 1905a:217: 1905b:328; 1906a:270; 1907d:l: Henry, 1960 138; Kolosvary, 1941a:41; 1942c:139; 1943a:80;" 1943b 121; 1955:185; 1967b:393; Lacombe, 1970:164 (cement glands); Menesini, 1967a:47; Nilsson-Cantell, 1929b:489 (mouthparts); 1931a:109; 1957:7; Ortmann, 1902:249 Phillipi, 1887:223; Pilsbry, 1909:66; Tournouer, 1903 471; Vayssiere, 1905:161; Weltner, 1895:291; 1897:261: 1898b:5; 1900:305; Zevina & Kurshakova, 1973:183. Distribution: Chile and Peru; Juan Fernandez Is.; Straits of Magellan; Southern Argentina. Plio-Pleisto- cene, Chile. Megabatanus psittacus chilensis (Menesini), 1967:47 [nomen nudum) Megabatanus rosa (Pilsbry), 1916:61 Synonymy/diagnosis: Yamaguchi, 1973:130, References: Broch, 1931:56; Hirano, 1953:139 (rearing and metamorphosis); Hiro, 1932a:549: 1937c:431; 1939f: 208; Kawahara (marine fouling communities), 1962:27 1963a:395; 1965:319; Kolosviiry, 1943a:79; Kruger, 1940 471; Mawatari, 1967:99 (distribution of fouling organ- isms); Mawatari et al, 1962:93 (fouling); 1963:101 (growth rate, fouUng); Nilsson-Cantell, 1931a:109 1932b:16; Tarasov & Zevina, 1957:164; Utinomi, 1949a 21; 1950:63; 1958a:294; 1962:215; 1969b:51; 1970:349: Utinomi & Kikuchi, 1966:5; Yamaguchi, 1971:124. Distribution: Japan, Formosa. Pleistocene, Japan. Megabaianus seguenzai (de Alessandri), 1895:277 Distribution; PUocene, Italy. Megabaianus spinosus (Gmelin), 1791:3213 Synonymy: Stubbings, 1967:265. Diagnosis; Stubbings, 1961c:184. References: Darwin, 1854b:196; Gruvel, 1903b:126; 1905a:212; Kolosvary, 1943a:78; Lacombe & Monteiro, 1974:633; Nilsson-CanteU, 1931a:109; 1938b:13; Pilsbry, 1916:58; Weltner, 1897:260. Distribution: Islands in the South Atlantic: St. Helena, Sao Tome, Principe, Annobon; Rio de Janeiro. Megabatanus stultus (Darwin), 1854b:216 Synonymy/diagnosis: Ross, 1968:14. References: Gruvel. 1905a:221; Henry, 1954:443; Kolo- svary, 1966:69 (as Batanus stultus forma morycowae); 1967b:393; Nilsson-CanteU, 1929a:l; 1939a:3; Pilsbry, 1916:235: 1927:38 (as Tetractita radiata); 1953:25; Welt- ner, 1897:262. Distribution: Florida and Caribbean; on Millipora. Megabatanus tanagrae (Pilsbry), 1928:311 Reference: Gordon, 1971:83. Distribution: Hawaiian Is. Megabatanus tintinnabutum (Linneaus), 1758:668 Synonymy: Darwin, 1854b:194 (includes pre-Darwin references). Diagnosis: Pilsbry, 1916:55. References: Annandale, 1906:147; 1911:1170 (growth rate); Barnard, 1924:66; Barnes & Klepal, 1971:79 (pedi- cel of penis); Boolootian, 1958:91 (attached to echinoid); Borradaile, 1903:441; Brocchi, 1814:597; Broch, 1924b: 203; 1927c;20; 1927d:133; 1931:56; Bruntz, 1902:987 (excretion); CaiUiaud. 1865:36; Caziot, 1921:51; Chilton, 1911:132; Cole & Addison, 1931:72 (stimulation by alco- hols); Cole, 1932b:143 (sensitivity of cirri); Daniel, 1952: 261 (respiratory mechanism); 1955a:99 (gregarious attraction); 1955c:17; 1956:21 (influence of color on settlement); 1957a:305 (effect of illumination on settle- ment); Daniel, 1957b:866 (influence of stage of tide) Darwin, 1854a:13; Davadie, 1952:26; 1963:26; Dawydoff, 1952:128; de Alessandri, 1895:270; 1906:285; 1907b;270 de Oliveira, 1941:11; 1947:720; Foster, 1967a:81; Gauld 1957:10; Gruvel, 1893a:405 (sheU growth and structure) 69 1903b:125; 1905a:211; 1909b:25: 1912a:345,350; GwiU- iam, 1965:244 (photoreceptor response); Hart, 1967:1 (chromosomes); Hiro. 1937b:51; 1939a:128; 1939e:258 Hoek, 1883:147; Karande, 1967:1245; Karande & Pale- kar, 1966:142; Kolosvary. 1943a:77; 1947a:12; 1947c 424; 1947d:425; 1951b:291; 1951c:411; 1959:197; 1960: 590; 1961c:149; 1967b:393; Kriiger, 1911a:47; 1911b;460 1940:464; Lacombe, 1966:1 (cement glands); 1967:1 1968:1; Lacombe & Ligouri, 1969:170; Lacombe & Mon teiro, 1974:633; Menesini, 1966:104; Moore, 1944:333 Morch, 1852:67; Nilsson-CanteU, 1931a:119; 1938a:179 1938b:33; 1939c:92; 1957:10; O'Riordan, 1967:291; Rao & Ganapati, 1969:193; ReUni. 1969:170; Riedl, 1963:258: Seguenza, 1876:438; Stubbings. 1910:567; Stubbings 1936:40; 1961b:20; 1961c:183; 1963b:13; 1964a:108 1964b:336; 1965:885; 1967:263; Tarasov & Zevina, 1957 163; Visscher, 1928b: 193 (fouhng); Withers, 1924:24 Weltner, 1887:101; 1895:291; 1897:260; 1898b:6; 1900 305; 1910:528; Zevina, 1963:72; Zevina & Tarasov, 1963:87. Distribution: Localities specifically for Balanus tintin- nabulum tintinnabulum or Balanus tintinnabulum com- munis: Western coast of Africa from Mediterranean to Cape of Good Hope; Eastern Mediterranean; Madagas- car, Arabian Sea; Bay of Bengal; Thailand; Formosa; Sagami Bay, Japan; New Zealand; Rio de Janeiro; Peru. Ohgocene and Miocene of Europe; Pho- Pleistocene, Venezuela. Megabalanus transsylvanicus (Kolosvary), 1950:3 Distribution: Miocene, Hungary. Megabalanus transuersostriatus (Beurlen), 1958:3 References: Brito, 1972:2. Distribution: Para, Brazil. Megabalanus tubulatus (Withers), 1924:28 Distribution: Phocene, New Zealand (Withers, 1953:80). Megabalanus tulipiformis (EUis), 1758:851 Synonymy: Utinomi, 1959a:382. Diagnosis: Darwin, 1854b:204. References: Crisp & Southward, 1961:271 (cirral activ- ity); Davadie, 1952:27; 1963:30; de Alessandri, 1895:272 1906:287; Gauld, 1957:10; Gruvel, 1903b:128; 1905a:216 1909b:25; 1912a:350; 1920:53; Hoek, 1875:59; Kolosvary 1943a:81; 1951c:411; Kriiger, 1940:464; Menesini, 1965 92; 1966:107; 1967b:218; NUsson-CanteU, 1921:308: 1931a:108; ReUni, 1969:169; Seguenza, 1876:283; South ward & Crisp, 1963:28; Stubbings, 1961b:21; 1961c:187 1963b:14; 1964a:108; 1964b:337; 1965:886; Visscher, 1928b:193 (fouhng); Withers, 1953:60,63. Distribution: Mediterranean; France; Spain; Portugal; Africa; Madeira, Canary and Cape Verde Is.; 25-250m. Miocene-Pleistocene, Europe and North Africa. Megabalanus tulipiformis arenarius (Seguenza), 1876:439 Reference: Davadie, 1963:30. Distribution: Tertiary, Mediterranean Basin. Megabalanus tulipiformis etruscus (Menesini), 1966:109 Distribution: Miocene, Italy. Megabalanus validus (Darwin), 1854b: 195 Synonymy/diagnosis: Hoek, 1913:164,166. References: Broch, 1931:56; Gruvel, 1903b:126; 1905a: 212; Kriiger, 1914:429; 1940:471; Nilsson-CanteU, 1938b: 12; Weltner, 1897:260. Distribution: Hull of "Siboga"; southwest Australia; Taiwan. Megabalanus venezuelensis (Weisbord), 1966:17 Distribution: Phocene, Venezuela. Megabalanus vesiculosus (Darwin), 1854b:195 References: Gruvel, 1905a:211; Weltner, 1897:260. Megabalanus vinaceus (Darwin), 1854b:213 Synonymy/diagnosis: Darwin, 1854b:213. References: Gruvel. 1905a:215; Kriiger, 1940:466; NUsson-CanteU, 1957:3; Weltner, 1895:289; 1897:261; 1898b:9. Distribution: West coast of South America. Megabalanus volcano (Pilsbry), 1916:60 Synonymy/diagnosis: Yamaguchi, 1973:133. References: Hiro, 1937c:430; 1938c:1848 (resistance to saUnity and exposure); 1939:208; Kriiger, 1940:471 Mawatari et al, 1962:93 (fouhng); Nilsson-Cantell, 1927a 783 (as Balanus tintinnabulum peninsularis); 1938b:34 Tarasov & Zevina, 1957:165; Utinomi, 1949a:21; 1958a 293; 1958b:51; 1969b:51; 1970:350; Utinomi & Kikuchi, 1966:5. Distribution: Southern Japan; Okinawa. Megabalanus wilsoni (ZuUo), 1969a: 10 Distribution: Phocene, CaHfornia. Megabalanus zebra (Darwin), 1854b:195 Synonymy: Stubbings, 1967:264. Diagnosis: Pilsbry, 1916:57. References: Barnard, 1924:66; Barnes & Klepal, 1971:81 (pedicel of penis); Davadie, 1963:26; Gruvel, 1903b: 126; 1905a:212; 1909a:214; 1912a:350; Hiro. 1939e:259; Karande, 1967:1245; Karande & Palekar, 1966:143; Kolosvary, 1943a:78; Menesini, 1966:106; Stubbings, 1961b:21; 1964a:108; Utinomi, 1968b:170; Weltner, 1897:260. Distribution: West Africa; Cape Verde Is. to Walvis Bay; Formosa; Phihpines. Incertae Sedis Chthamalus revilei Locard, 1878:17 Distribution: Neogene, France Remarks: Absence of opercular parts, and size of shell (basal dia. 27mm, height 15mm) precludes assignment to Chthamalus ss. Balanus borsodensis Kolosvary. 1952:410 Distribution: Miocene, Hungary. Balanus chisletianus Sowerby, 1859 Reference: Withers. 1953:39. Distribution: Eocene(?), England. Balanus echinicola Hoek, 1912:408 Distribution: Malay Arch.; 216m. Remarks: Apparently never described, hence nomen nudum. Balanus ecuadoricus Pilsbry & Olson, 1951:200 Distribution: Ohgocene of Ecuador. Remarks: Authors suggest relationship with B. nubilus but opercular parts appear close to crenatus. Balanus flosculoidus Kolosvary, 1941e:9 Distribution: Japan. Balanus gizellae Kolosvary. 1962c:195 Reference: Kolosvary. 1967b:392. Distribution: Tonga I. Balanus hohmanni Philippi. 1887:225 Distribution: Tertiary, Chile. Balanus irregularis Broch, 1931:61 Distribution: Banda Sea; 290m. Remarks; Mouth parts wrong for B. crenatus; form is that of Solidobalanus, but Brock placed in his Eubal- nus (porous wall), which for present precludes its assignment. Balanus humilis Conrad, 1846:400 Reference: Ross, 1967:173 (internal cast). Distribution: Miocene, Florida. Balanus mirabilis Kriiger, 1912:11 Reference: Pilsbry, 1916:79. Distribution: Japan. Remarks: Figures suggest it may belong to the group of B. amphitrite. Balanus microstomas Phihppi, 1887:225 Distribution: Tertiary, Chile. Balanus pannonicus Kolosvdry, 1952:233 Distribution: Miocene, Hungary. Balanus sauntonensis Parfitt, 1871:210 Distribution: Fossil, North Devon, England. Balanus shilohensis Pilsbry, 1930:431 Distribution: Miocene, New Jersey. Remarks: Too incompletely known to be placed in a 70 group. Pilsbry compares it to B. concavus and Semi- balanus. Balanus similis Weltner, 1922:83 Distribution: Off South Africa; 638ni. Remarks Porous wall precludes placing in Solidobatanus; figure suggests wall of 8 plates. Balanus tuboperforatus Kolosvary, 1962c:197 Reference: Kolosvary, 1967b:392. Distribution: Tonga I. Balanus tumorifer Kolosvdry, 1962c:195 Reference: Kolosvdry, 1967b:392. Distribution: Tonga I. Balanus veneticensis Seguenza, 1876:303 Reference: Withers. 1953:62. Distribution: Tertiary, Italy. Balanus violaceus Gruvel, 1903b:133 Distribution: Unknown. Remarks: Author compares with nubilus; appears to us to be closer to group of B. amphitrite. Lamy and Andre (1932:218, footnote) proposed specific name of abeli to replace violaceus which was preoccupied. 71 LITERATURE CITED Abel, O. 1920. Lehrbuch der Palaozoologie, Gustav Fischer, Jena. 500 pp. 1926. An der kalifornischen Kuste. In, Amerikafahrt, p. 244-253. Gustav Fischer, Jena. 1927. Paracreusia Trolli n.g. n. sp., eine auf Stockkorallen schmarotzende Balane aus dem miozanen Medi- terranmeer. Verh. Zool.Bot. Ges. 77:101-103. 1928. 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Hift, H. Huddart and E. Tong. 1974. The effects of caffeine on sodium transport, mem- brane potential, mechanical tension and ultra- structure in barnacle muscle fibres. J. Physio. (Lond.) 242(11:1-34. (Balanus nubilus, B. aquila) Blaber, S. J. M., B. J. Hill and A. T. Forbes 1974. Infratidal zonation in a deep South African estuary. Mar. Biol. 28(41:333-337. (Balanus amphitrite Darwin) Borovikov, Y. S., M. Rozanov, I. Y. Barskii, M. S. Shudel and N. A. Chernogryadskaya 1972. Study into the polarized ultraviolet flourescence of giant muscle fibers of Balanus rostratus. Tsitologiya 14(8):953. Boulton, G. S. and M. Rhodes 1974. Isostatic uplift and glacial history in nothern Spitsbergen. Geol. Mag. lll(6):481-500. (Balanus balanus) Bourget, E. 1974. Environmental and structural control of trace elements in barnacle shells. Mar. Biol. 28:27-36. (Balanus balanoides, B. crenatus, B. hameri, Chthamalus steltatus, Elminius modestus) Bourget, E. and D. J. Crisp 1975. An analysis of the growth bands and ridges of barnacle shell plates. J. Mar. Biol. Assoc. U. K. 55(21:439-461. (Balanus balanoides, B. hamen, B. improvisus, Acasta spongites, Bathylasma corolli- forme, Elminius modestus) Bourget, E. and G. LaCroix 1972. Colonisation et inhibition de la colonisation des cirripedes dans I'estuaire du Saint-Laurent. Nat. Can. (Que.) 99(4):279. (Balanus balanoides, B. crenatus) 1973. Aspects smssoniers de la fixation de I'epifaune benthique de I'etage infrahttoral de I'estuaire du Saint-Laurent. J. Fish. Res. Board Can. 30(7):867- 880. (Balanus balanoides, B. crenatus) ♦These references were encountered after the Catalog of Species was in page proof. The species cited in these papers are indicated either in the title of the paper, or listed in parenthesis following the reference, and access to them is via the Index. Boyd, R. J. 1973. The relation of the plankton to the physical and biological features of Strangford Lough, Co. Down. Proc. R. Irish Acad., Sect. B, 73(20):317-353. (Balanus balanoides) Brown, H. M. and M. C. Cornwall 1975. Ionic mechanisms of a quasi-stable depolarization in barnacle photo-receptor following red light. J. Physiol. (Lond.) 248(3):579-594. (Balanus ebumeus) Caille, J. P. and J. A. M. Hinke 1974. The volume available to diffusion in the muscle fiber. Can. J. Physiol. Pharmacol. 52(4):814-828. (Balanus nubilus) Chan, G. L. 1973. Subtidal mussel beds in Baja CaUfornia with a new record size for Mytilus califomianus. Veliger 16(2): 239-240. (Balanus tintinnabulum) Chen, S. S. 1975. Effects of local anesthetics and hemicholinium-3 on ''^Ca efflux in barnacle muscle fibers. Can. J. Physiol. Pharmicol. 53(2):285-292. (Balanus aquila, B. nubilus) Chernogryadskaya, N. A., I. Barskii, M. S. Shudel, Y. M. Rozanov and Y. S. Borovikov 1973. Use of polarized UV fluorescence microscopy to study giant muscle fibres in Balanus rostratus Hoek. Dokl. Biol. Sci. 207(l-6):625-628. Cheung, P. J. 1974. The effect of ecdysterone on cyprids of Balanus ebumeus Gould. J. Exp. Mar. Biol. Ecol. 15(2):223- 229. Cheung, P. & R. Nigrelli 1972. Histochemical analysis of the fluid and solid state of the adhesive materials produced by the pre- and postmetamorphosed cyprids of Balanus ebumeus Gould. Zoologica 57(2):79-95. Chimenz Gusso, C. and E. Taramelli 1973. The biocenoses incrusting Eternit panels immersed at different depths in the port of Civitavecchia. BoU. Pesca. Piscic. Idrobiol. 28(1):77-100. (Balanus amphitrite, B. perforatus, B. ebumeus) Comer, E. D. S. R. N. Head, C. C. Kilvington and S. M. MarshaU 1974. On the nutrition and metabohsm of zooplankton. IX. Studies relating to the nutrition of overwinter- ing Calanus. J. Mar. Biol. Assoc. U. K. 54(2):319-331 Crisp, D. J. and C. A. Richardson. 1975. Tidally-produced internal bands in the shell of Elminius modestus. Mar. Biol. 33(2): 155-160. (Elminius modestus, Balanus balanoides) Daniel, A. 1972. Marine intertidal barnacles in the Indian Ocean. Proc. Indian Natl. Sci. Acad., Part B, Biol. Sci. 38(3/4):179-189. (Balanus amphitrite cirratus, B. a. communis, B. a. hawaiiensis, B. a. niveus, B. a. variegatus, B. amaryllis euamaryllis, B. ajax, B. longirostrum krusadaiensis, B. madrasensis, B. patellaris, B. roonwali, B. sinnurensis, B. tintin- nabulum tintinnabulum, B. t. occator, B. t. validus, B. t. volcano, Chthamalus challengeri, C dentatus, C hembeli, C. malayensis, C moro, C. steltatus, C. withersi, Creusia spinulosus euspinulosa, Octomeris angulosa, O. intermediia, Pyrgoma conjugatum, P. gonioporae, P. grande, P. projectum, Tetrachtha- malus oblitteratus, Tetraclita alba, T. coerulescens, T. purpurascens, T. rosea, T. squamosa communis, T. s. patellaris, T. s. rufotincta, T. s. serrata, T. s. viridis, T. vitiata, T. wireni africana) 101 Davis, C. W. and J. D. Costlow 1974. Evidence for a molt inhibiting hormone in the barnacle Balanus improvisus (Crustacea, Cirripe- dia). J. Comp. Physiol. B Metab. Transp. Funct. 93(2);85-92. Devillez, E. J. 1975. Observations on the proteolytic enzymes in the digestive fluid of the barnacle Balanus nubilus. Comp. Biochem. Physiol, A Comp. Physiol. 51(2): 471-474. Dresdner, G. W., F. Ojeda and H. Hess-Ojeda 1974. Microscopical structure of muscles from the operculum of the barnacle Balanus psittacus Molina. Zool. Anz. 192(1/2):15-21. Fyhn, U. E. H. 1976. Holeuryhalinity and its mechanisms in a cirriped crustacean, Balanus improvisus. Comp. Biochem. Physiol. 53A: 19-30. Fyhn, U. E. H. and J. D. Costlow 1975. Tissue culture of cirripeds. Biol Bull. 149(21:316-330. (Balanus amphitrite, B. ebumeus, B. improvisus) Ganapati, P. N. and D. R. K. Sastry 1974. Record of Athanas indicus (Coutiere) (Decapoda: Alpheidael associated with Stomopneustes vario- laris (Lamarckl (Echinodermata: Echinoideal from Visakhapatnam Coast. Proc. Indian Nat. Sci. Acad., Part E., Biol. Sci. 38(5/61:367-372. (Balanus amphitrite amphitrite, B. trigonus) Gardner, D. and J. P. Riley 1972. Seasonal variations in the component fatty acid distributions of the Upids of Balanus balanoides. J. Mar. Biol. Assoc. U. K. 52(41:839-845. Gorin, A. M. and A. M. Murakhveri 1973. Seasonal dynamics of settling and growth of Balanus and Mytilus in the Peter the Great Bay. Ekologiia 4(2):86-89. (Balanus crenatus) Granier, J. 1973. Le genre Balanus sur les cotes de Camargue et du Gard. Soc. Linn. Lyon Bull. Mens. 42(8):203-212. (Balanus amphitrite, B. crenatus, B. ebumeus, B. perforatus, B. trigonus, Megabalanus tintinnabulum) Henry, D. P. and P. A. McLaughlin 1975. The barnacles of the Balanus amphitrite complex (Cirripedia, Thoracica). Zool. Verhandel. 141:1-254. (Balanus alatus, B. amphitrite albicostatus, B. a. aeratus, B. a. amphitrite, B. abeli, B. a. cirratus, B. a. cochinensis, B. a. columnaris, B. a. communis, B. a. denticulata, B. a. fluminensis, B. a. form- osanus, B. a. franciscanus, B. a. hawaiiensis, B. a. herzi, B. a. inexpectatus, B. a. insignis, B. a. kon- dakovi, B. a. krugeri, B. a. matayensis, B. a. modestus, B. a. niveus, B. a. obscurus, B. a. pallidus, B. a. peruvianas, B. a. poecilosculpta, B. a. poecilotheca, B. a. rafflesi, B. a. stutsburi, B. a. tesselatus, B. a. variegatus, B. a. venustus, B. a. vladivostokensis, B. a. saltonensis, B. carenatus, B. citerosum, B. concavus indicus, B. c. mexicanus, B. c. pacificus, B. c. p. brevicalcar, B. aquila regalis, B. c. sinensis, B. democraticus, B. dentivarians, B. dybowskii, B. ebumeus, B. improvisus. B. i. assimitis, B. i. gryphicus, B. minutus, B. mirabilis, B. pacificus, B. pacificus brevicalcar, B. pallidas, B. pallidus krugeri, B. patellaris, B. patelliformis, B. aquila, B. reticulatus, B. subalbidus, B. sutural- tus, B. tintinnabulum maroccana, B. uliginosus, B. variegatus, B. v. cirratus. B. v. tesselatus, B. venustus, B. v. modestus, B. v. niveus, B. v. obscurus, B. violaceus, B. armatus) HUlaire-Marcel, C, G. Prichonnet and B. De Boutray 1974. Marine Pleistocene facies from the hills at Oka, Quebec. Nat. Can. (Que.) 101(5):781-802. (Balanus hameri, B. crenatus) Hochstein, S., B. Minke and P. Hillman 1973. Antagonistic components of the late receptor potential in the barnacle photoreceptor arising from different stages of the pigment process. J. Gen. Physiol. 62(1):105-128. (B. amphitrite, B. ebumeus) Holland, D. L. and P. J. Hannant 1973. Addendum to a micro-analytical scheme of the biochemical analysis of marine invertebrate larvae. J. Mar. Biol. Assoc. U. K. 53(4):833-838. (Balanus balanoides, B. hameri, Elminius modestus) Houk, J. L. and J. M. Duffy 1972. Two new sea-urchin-acorn barnacle associations. Calif. Fish and Game 58(4):321-323. (Balanus concavus pacificus, B. nubilus) Hoyle, G.. P. A. McNeill and A. I. Selverston 1973. Ultrastructure of barnacle giant muscle fibers. J. CeU Biol. 56(1):74-91. (Balanus nubilus) Hughes, G. R. 1974. The sea turtles of South-east Africa, II. Oceanogr. Res. Inst. (South Africa), Inves. Rept. 36:1-96. (Balanus sp. (=trigonusJ ) Hurley. A. C. 1975. The establishment of populations of Balanus pacificus Pilsbry (Cirripedia) and their elimination by predatory Turbellaria. J. Anim. Ecol. 44(2):521- 532. Ireland, M. P. 1974. Variation in the zinc, copper, manganese and lead content of Balanus balanoides in Cardigan Bay, Wales, Environ. Pollut. 7(l):65-75. Jocque, R. and D. Van Damme 1972. Introduction to the ecological study of intertidal clay and peat banks at Raversijde Belgium. Biologisch Jaarboek, Belgium 39:157-190. (Balanus balanoides, B. crenatus, Elminius modestus) Kasymov, A. G., R. M. Bagirov and G. M. Fihppov 1974. Benthos of the southeastern Caspian Sea coast. Zool. Zh. 53(3):454-456. (Balanus improvisus) Kidson, C. and R. Wood 1974. The Pleistocene stratigraphy of Barnstable Bay. Proc. Geol. Assoc. 85:223-237. (Balanus balanoides) Krischer, C. C. 1971. The photo-electric efficiency of the median and the lateral photo receptor of the barnacle Balanus (Balanus) ebumeus. Z. Naturforsch., Teil B, 26(12): 1326-1335. Kuznetsova, I. A. 1973. Assimilation of some food kinds of cirriped crusta- ceans. Gidrobiol. Zh. 9(4):42-50. (Balanus bala- noides, B. ebumeus, B. improvisus) LaCombe, D. 1973. Cria^ao de Balanideos em laboratorio. Trab. V Congr. Latinoam. Zool. Montevideo, 1:168-174. (Balanus amphitrite albicostatus, B. a. denticulata, B. a. hawaiiensis, B. tintinnabulum tintinnabulum, Chelonibia patula, Chthamalus stellatus) Larman, V. N. and P. A. Gabbott 1975. Settlement of cyprid larvae of Balanus balanoides and Elminius modestus induced by extracts of adult barnacles and other marine animals. J. Mar. Biol. Assoc. U. K. 55:183-190. Long, E. R. 1974. Marine fouling studies off Oahu, Hawaii, USA. Vehger 17(l):23-36. (Balanus amphitrite, B. crena- tus, B. ebumeus, B. tintinnabulum, B. trigonus) Magre, E. J. 1974a. Population density of Balanus balanoides in rela- tion to tide pool water level. (Cirripedia Thoracica). Crustaceana 26(2):139-142. 1974b. Ulva lactuca L. negatively affects Balanus balanoides (L.) (Cirripedia Thoracica) in tidepools. Crustaceana 27(3):231-234. Maurer, D. and L. Watling 1973. Studies on the oyster community in Delaware: the effects of the estuarine environment on the associ- 102 ated fauna. Int. Rev. Gesamten Hydrobiol. 58(2|: 161-201. IBalanus ebumeus. B. improvisus) Meith-Avcin, N. 1974. DDT and the rugophilic response of settling barnacles Balanus improvisus. J. Fish. Res. Board Can. 31(121:1960-1963. Mohammad, M.-B. M. 1975. Competitive relationship between Balanus amphi- trite amphitrite and Pomatoleios krausii with special reference to their larval settlement. Hydro- biologia46(l):l-16. Moore, H. B., H. B. Albertson and S. M. MiUer 1974. Long-term changes in the settlement of barnacles in the Miami area. Bull. Mar. Sci. 24(1|:86-100. IBalanus amphitrite amphitrite. B. ebumeus. B. improvisus. B. reticulatus. B. trigonus) Nielsen, R. 1972. A study of the shell-boring marine algae around the Danish Island Laeso. Botanisk Tiddsskrift 67(31:245-269. (Balanus balanoides) Paine, R. T. 1974. Intertidal community structure: experimental studies on the relationship between a dominant competitor and its principal predator. Oecologia (Berl.) 15(21:93-120. IBalanus cariosus. B. glandula, Chthamalus fissusi Partaly, E. M. 1974. Seasonal changes of epibiotic communities on Balanus improvisus on overgrowth biocenosis. Zh. Obshchei Biol. 35(31:454-459. PiUai, N. K. and Balakrishnan Nair. 1974. Observations on the incidence and seasonal fluc- tuations of certain crustacean larvae in the plank- ton of the southwest coast of India. Hydrobiologia 43(3/4):443-461. IBalanus amphitrite communis) PoUock, L. W. 1975. Observations on marine Heterotardigrada, includ- ing a new genus from the western Atlantic Ocean. Cah. Biol. Mar. 16(1):121-132. (Balanus balanoides) Pratt, D. M. 1974. Attraction to prey and stimulus to attack in the predatory gastropod Urosalpinx cinerea. Mar. Biol. 27(l):37-45. IBalanus balanoides. B. ebumeus) Rao, D. G. V. and P. N. Ganapati 1972. Respiration in relation to salinity variation in inter- tidal barnacles. Proc. Indian Nat. Acad., Part B, Biol. Sci. 38(5/6):425-429. IBalanus amphitrite amphitrite. B. tintinnabulum tintinnabulum) Rogers, F. L. 1948. Description of a new species of barnacle from Panama. Bull. Southern California Acad. Sci. 47(3): 95-99. {Balanus panamensis: a senior synonym of Balanus eyerdami Henry, according to D. P. Henry, pers. comm.) Roth, V. D. and W. L. Brown. 1975. A new genus of Mexican intertidal zone spider (Desidael with biological and behavioral notes. Am. Mus. Novit. 2568:1-7. ITetraclita squamosa) Sergy, G. A. and J. W. Evans 1975. The settlement and distribution of marine organ- isms fouUng a seawater pipe system. Veliger 18(11:87-92. IBalanus balanoides) Shikami, T. 1973. MoUuscan assemblages of the basal part of the Zushi Formation in the Miura Peninsula. Sci. Rep. Tohuku Univ., Sec. Ser, (Geol.l, Spec. 6:179-204. IBalanus aff. amphicostatus l=albicostatusl ) Southward, A. J. MS. A reconsideration of the taxonomic status and distribution of Chthamalus stellatus (Cirripedial in the N. E. Atlantic region. Stickle, W. B. 1973. The reproductive physiology of the intertidal prosobranch Thais lamellosa (Gmelinl. 1. Seasonal changes in the rate of oxygen consumption and body component indexes. Biol. Bull. 144(3):51 1-524. IBalanus cariosus, B. glandula) Thomas, M. L. H., D. R. Grant and M. de Grace 1973. A new late Pleistocene marine shell deposit at Shippegan New Brunswick. Can. J. Earth Sci. 10(81:1329-1332. IBalanus crenatus, B. hameri, B. improvisus) Wagh, A. B. and D. V. Bal. 1974. Observations on systematics of sessile barnacles from the west coast of India: I. J. Bombay Nat. Hist. Soc. 71(11:109-123. IBalanus am'aryllis euamaryllis. B. amphitrite communis. B. a. hawaii- ensis, B. a. stutsburi. B. a. venustus, B. tintin- nabulum tintinnabulum. Chelonibia patula, C. testudinaria, Chthamalus malayensis, C. withersi, Tetraclita ITetraclitella) purpurascens) Walker, G., P. S. Rainbow, P. Foster and D. J. Crisp 1975. Barnacles: possible indicators of zinc pollution? Mar. Biol. 30(11:57-66. Walker, G., P. S. Rainbow, P. Foster and D. L. HoUand 1975. Zinc phosphate granules in tissue surrounding the midgut of the barnacle Balanus balanoides. Mar. Biol. 33(21:161-166. 103 SYSTEMATIC INDEX (Only italicized page numbers lead directly to valid species in the Catalog) Aaptolasma 46,20-22,31,33 abeli (see violaceus). 70, 101 Abundantus 62 Acasta 53-54,49,23,28,34 Actinobalanus 49,23,24 actinomorphus 49 aculeata 53 acuta, -us, Conopea 54 acuta, -um, Cantellius 56 acutus, Balanus 62 aeneas 51 aeratus 62, 101 aethiops 66 aestuarii 40,41,31 africana 47, 100 ajojc 67,100 alaskensis 61 alatus 65,101 alba, Acasta 53 alba, Tetraclita 47, 100 albus, Chirona 50 albicostatus 62, 101,102 formosanus 62 alcyonicola 53 algicola 67 costatus 67 japonica 67 novarae 67 typica 67 allium 49 truncatus 49 alloplax 61 altissimus 61 altavellensis 67 amakusana 53 americanum 46,31 amaryllis 50 euamaryllis 50,100,102 dissimilis 50 laevis 50 nivea 50 amphitrite 62,64,70,33,34, 100,101,102 abundantus 62 acutus 62 aeratus 62, 101 albicostatus 62,101,102 archi-inexpectatus 62 cirratus 64,65,100,101 cochinensis.- 62, 101 columnarius 62, 101 communis 62,64,100,101.102 fluminensis 62, 101 helenae 62 hungaricus 62 inexpectatus 62-63,34,101 insignis 63,64,101 karakumiensis 63 kondakovi 63, 101 krugeri 64,101 litoralis 63 malayensis 64,101 merklini 63 obscurus 65,101 peruvianas 63, 101 peocilosculpta 63,64,101 rafflesi 63,101 stutsburii 64,101,102 tesselatus 64,101 tongaensis 63 variegatus 64,100,101 venustus 65,101,102 vladivostokensis 63,65,101 amphitrite, group of Balanus 62- 65,69,13,23,24,34 anchoris 54 Andromacheia 59 anglicum, -a 59, 58 angulosa 40, 100 angusticalcar 53 angustiradiata 58 angustiterga, Creusia 58 angustitergum, Chthamalus 41 angustus 67 anisopoma 41 annandalei 58 antarcticum 46 antennatus 4i,42,19 antillensis 67 antipathidis 53 antiqua, -um, Coronula 45 antiquus, Chthamalus 42,50 aotea 44,45 aperta, Acasta 53 apertus, Balanus 61,65 apertus, Balanus rostratus 61 appelloefi 40 aquila 6i, 100,101 arafurae 46 Archaeobalanidae, -inae 49-56, 11,23,24,38 Archaeobalanus 49,22-24 archi-inexpectatus 62 arcuatus, Balanus 49 arcuatum, Cantellius 57,34 arenarius 69 artica 59 armata, Acasta 53 Armatobalanus 49,50,23,24, 28,30,31 A. (Armatobalanus) 49,50,23,34 A. (Hexacreusia) 50,23 armatus, Balanus 64,65,66,101 assimilis 64,101 astacophilus 50 aucklandicum 45-46 aurantiacum 40 auricoma 50 Austrobalaninae 46,11,21,38 Austrobalanus 46,49,21,31 azoricus 67 balaena 45 balaenaris 45 Balanidae 59-69,11-16,23,39 Balanoidea 49-69,9,12,15, 22-24,38,30,31 balanoides 55-56,22,25,28, 100,101,102 calcaratus 56 Balanoidomorphoidea 43,2,20-22, 36,30,31 Balanomorpha 9-24,36,26,27, 28,29,31 Balanus 59-69, 14,23,28,30, 31,33,34 balanus 59-60, 100 pugetensis 59,60 balanus, group of Balanus 59-60, 23 barbadensis .58 barbara 45 basicupula 53 (Bathybalanus) 52,23 Bathybalanus 52,22,23 Bathylasma 45,46,15,20-22,31.33 Bathylasmatidae, -inae 45,46,11 13,21,37 belyaevi 41 bifida 45 bimae 50 bimanicus 50 biscayensis 45 bisexlobata 44 bisinuatus 43 bisulcatus 49 plicatus 49 bloxhamensis 61 borsodensis 69 Boscia 5923,28 Boscinae 59,11,23,24,39 brachialis 52 Brachylepadomorpha 11.12,15,16 brevicalcar 66, 101 breviscutum 46,33 brevitergm 57 brintoni 46 brunnea, Chamaesipho 43 brunnea, Octomeris 40 caboblanquensis 63 calabrus 65 calcaratus 56 calcareobasis 41 calceolus, -a 54 calidus 65 nonstriatus 65 califomica, Diadema 45 califomicus, Megabalanus 67,30 callistoderma 46 calvertensis 49 campbelli 67 cancetlorum 53 cancellata 58 candidum, Coronula 45 candidus, Balanus 64 CanteUius 56-57,23,34 capellini 43 capensis 67 carenatus 62,101 caretta 43 caribensis 63 cariosus 56,30,102 Catomerus 40,14,17,18,31 Catophragmidae 40,11,19,36 Catophragmus 40,14,17,18,29 caudatus, -a 41 cepa 49 Ceratoconcha 58-59,23,24,28 Ceratoconchinae 58,11,23,24,39 Cetolepas 45,21 Cetopirus 45,21 challengeri 4i, 42,100 krakatauensis 41 nipponensis 41 104 Chamaeosipho 43,17,18 Chelonibia 43,20-22,29,33 Chelonibiinae 43,44,11,21,37 cheltrypetes 43 chesapeakensis 61 chilensis 68 chinense, Pachylasma 40 chinensis, Tetraclitella 46 Chionelasmus 40,4,17,18, 19,31,32 Chirona. 50 C. (Chirona) 50,23 C. (Striata balanus) 50,23 chisletianus 69 chordatus 67 Chthamalidae, -inae, -oidea 40,41- 43,11-16,17-20,36,29.30,31 Chthamalus 40,13,17,18,31,32 ciliatus 50 circe 49 cirratus, Chthamalus 4i,40 cirratus. Balanus ... 64-65,63,100,101 citerosum 6?,65,101 cladangiae 59 ctavatus 60 clippertonensis 67 coccopoma 67 cochinensis 62, 101 coerutescens 47, 100 columna 43 columnaris 62, 101 communis, Balanus amphitrite . . . . 62, 100,101,102 communis, Chthamalus stellatus. . . 42 communis, Megabatanus 68 communis, Tetraclita 48,100 complanatus, -a 45 compressus 51 concavus 6i, 66,68,70 alloplax 61 chesapeakensis 61 coosensis 61 dallonii 61 eseptatus 61 finchii 61 glyptopoma 61 indicus 61,101 mexicanus 61, 101 oligoseptatus 61 pacificus 66,68,101 proteus 61 raphanoides 61 rariseptatus 61 rubescens 61 scrutorum 61 sinensis 67, 101 concavus, group of Balanus 61- 62,23,28,31 concinnus 67 confinis 48 conica 5,3,34 conicocystata 58 conjugatum 58, 100 connelli 60 Conopea 54-55,23,28,30 coosensis 61 coquimbensis 65 coriobasis 53 comutus, Chthamalus 43 comutus, -a, Conopea 55 comwalli 51 corolliforme. -is 46,31,33,100 Coronula 44,45,11,21 Coronulidae, -inae 43-45,11,20, 21,24,37 corrugatus 49 costata, -um, Ceratoconcha. 58,59 costata, Tetraclitella 46 digita 46 costatus, Megabalanus 67 cranchii 67 crassa, Acasta 53 crassa, Octomeris 40 crenatibasis 43 crenatiformis 57 crenatum, Savignium 57 crenatus, Balanus 60,59,69,30, 100,101,102 curviscutum 60 delicatus 60 cretaceum 40 Creusia 57-58,56,59,13,23 creusioides 58 crinoidophilum 40 crispatus 67 cristallinus 52 Cryptolepas 45,21 ctenodentia. 53 cuneiformis 52 curvirostratus, Balanus 65 curviscutum 60 cuspidatus 53 cyathus 53 cybosyrinx 44 cylindricus 67 Cylindrolepas 44, 21 cymbiformis 55 dalli, Balanus 61 dalli. Chthamalus 42 dalloni 61 darwini, Balanus (B.) 65 calabrus 65 darwini, Cetopirus 45 darwini, Chionelasmus . . . 40, 4, 31, 32 darwini, Coronula 45 darwini, Tetraclitella 47 darwiniana, Ceratoconcha 58 darwiniana, Cylindrolepas 44 darwinianum, Pachylasma 40 decima 57 declivis 53 decorata 44 decorus 67-68 delicatus 60 democraticus (see ebumeus) 101 dentata, Chelonibia 44 dentatum, Savignium 57 dentatus, Chthamalus 42, 100 denticulata, Acasta 53 denticulata, Balanus 62, 101 dentifer 55 dentivarians 63, 101 depressa, Chelonibia 43 depressa, Tetraclitella 47 depressa, Tetraclita 47, 48 depressus, -a, Euraphia 41, 40 devonica, Paleocreusia 58 Diadema 45 diadema. 45 digita 46 diploconus, -a 58 dissimitis 50 divisa 47, 31 dotfleini 53 dollfusi, Balanus 66 dollfusii, Megabalanus 68 dolosus 49 domingensis 58 dorbignii 68 dormitor 45 dumortieri 47 duploconus 58 durhami 50 duvergieri 49 dybowskii 64, 101 ebumeus 63, 100, 101, 102 ecaudatum 40 echinata 53 echinicola 69 echinoplacis 51 ecuadoricus 69 elegans, Stomatolepas 44 elegans, Tetraclita 48 elizabethae 51 Elminius 52, 46, 16, 23 elongatum 57, 55 Emersonius, -inae ... 44, 11, 13, 21, 37 emkweniensis 51 engbergi 51 Eobalanus 60 Eoceratoconcha 55, 23, 28 Eoverruca 11 Epopella 46, 21, 22, 33 eseptatus 61 estrellanus, Balanus 61 etruscus 69 euamaryllis 50, 100, 102 Eubalanus 69 Euraphia, -inae 40-41, 11, 17-20, 36, 27, 31, 32 euspinulosa, -um 57, 100 evermanni 50 eyerdami 61, 102 fallax 51 fenestrata 53 ficarazzensis 45 filigranus 49 finchii 61 fischeri 53 fissus 42, 102 fistulosus 67 flexuosa 53 floridana. Ceratoconcha 58 floridana, Tetraclita 48 flosculus 52 sordidus 52 flosculoidus 69 flos 61 fluminensis 62, 101 folliculus 55 foraminifera 53 formae 53 formosana, Tetraclita 48 formosanus, Balanus 62, 101 fossata 53 fossilis, Balanus improvisus 64 fossilis, Balanus laevis 65 fosteri 46 fragilis, Chthamalus 42, 31 fragilis, Conopea 55 franciscanus 62, 101 fuchsi 59 funiculorum 49 fujiyama 49 fujiyamaformis 49 galapaganus SS galeatus, -a. 55, 30 georgiana 49 giganteum, Megabalanus 68 105 giganteum. Pachylasma 40 gilmorei 43 gizellae, Balanus 69 glaber. 41 glandula 60, 28, 30, 102 glans 53 globicipitis 45 glyptopoma 61 gonioporae (see orbicetlae) 100 grandis. -e 5S, 31, 100 granulatus, -a 55 gregarea, -ius, Cantellius 57 gregaria, Acasta 53 gregarius, Radiolites, Tamiosoma . . 61 gregarius, Balanus 61 gryphicus 64, 101 halomitrae 58 hameri 50. 100, 101, 102 hammeri (=hameri) 50 hantkeni 49 hawaiensis, Solidobalanus 51 hawaiiensis. Balanus 62, 100, 101, 102 helenae 62 hembeli 4i, 13, 19, 31, 100 hemisphaerica 43 hentscheli 47 hertleini 45 herzi 62, 101 (Hespenbalanus). 51-52, 23 hesperius 51 laevidomiformis 51 laevidomus 51, 30 nipponensis 51 heteropus 61 hexastytos 44 ichthyophila 44 IHexacreusia) 49, 50, 23 Hexelasma 46, 40, 50, 1 1, 14-17, 20. 21 Hexelasminae 46, 21, 37 Hiroa 57, 23 hirsuta 53 hirsutum 46 Hoekia 58, 23, 24, 34 hoekianus, -um 50 hohmanni 69 honti 68 hopkinsi, Balanus 63 humilis, Balanus 69 hungaricus, (Balanus) 62 hungaricus, Megabalanus 68 hyastina 47 hystrix 66 ichthyophila. 44 idiopoma 53 imbricatus 40 imperator 46, 20, 31 imperatrix 42 improvisus 63, 62, 100, 101, 102 assimilis 64, 101 fossitis 64 gryphicus 64, 101 inclusus 49 indicum, Creusia 57-58 indicum, Pyrgoma 57-58 merulinae 58 symphylliae 58 indicus, Balanus 61, 101 indicus, Platylepas 44 inexpectatus 62-63. 101 insignis 63, 64, 101 integrirostrum 40 intermedia 40, 100 intermedius 68 intertextus, -a 41, 27, 32 investitus, -a 55 irregularis 69 Isolde 68 isseti 47 iwayama 57 japonica, Acasta 53 japonica, Diadema 45 japonica. Megabalanus 67 japonica, Pyrgoma 58 japonica, Tetraclita 48 japonicum, Pachylasma 40 javanicus 68 jedani 55 Jehlius 43,18 jungi 59 kanakoffi 65 karakumiensis 63 karandei 47 Kathpalmeria 49,23 kingii 52 kleinii 45 kojumdgievae 58 komaii 54 kondakovi 63, 101 krakatauensis, Chthamalus 4i,42 krakatauensis, Megabalanus 68 krambergeri 59 krugeri, Balanus 64,101 krugeri, Chirona 50 krugeri, Platylepas 44 krusadaiensis 53,100 kugleri 55 kuri 58 laevidomiformis 51 laevidomus 5i,30 laevigata 54, 58 laevis, Balanus 65,28,34 coquimbensis 65 fossilis 65 nitidus 65 nonsulcatus 65 laevis, Chioma 50 laevis, Eliminius 52 laguairensis 65 latum 59 leganyii 68 leonensis 65 leptoderma 46, 33 libera 54 ligusticus 42 litoralis 63 lobatobasis 43 longibasis 55 longirostrum 53 krusadaiensis 53,100 macsotayi 45 maculatus 50 madrasensis 56, 100 madreporicola, Acasta 49 madreporum, Cantellius 57 madreporarae, Boscia 59 major 45 malayensis, Balanus 64.101 malayensis, Chthamalus 42,41, 100,102 maldivensis 5J, 50 manati 43 crenatibasis 43 lobatobasis 43 maroccana 64, 101 mastignotus 51 maxillaris 67,68 maxima 41 Megabalanus 67-69,13,23,28, 29,30.31,34 Megatrema. 59 membranacea 54 Membranobalanus 52,23 merklini 63 merrilli 55 merulinae 58 Metabalanus 50 mexicanus 61, 101 microforamina 54 microstomus 69 microtretus 42 milensis 51 milleporum, Savignium 57 milleporosa, Tetraclita 48 minuta, Ceratoconcha 59 minutus, Balanus 65, 101 miocaenica, Ceratoconcho 59 miocenicus, Actinobalanus 49 mirabilis, Balanus 69, 101 mirabilis, Balanus perforatus 67 mitra, Tetraclita 48 modestus, Balanus 65, 101 modestus, Elminius 52, 100,101 laevis 52 mojbergi 55 molluscorum 52 monticutariae 58,34 moro 41,42,100 moravica 58 morycowae 68 multicostata, Tetraclitella 47 multicostatum, Pyrgoma 59 multidecorata 44 multiseptatus 68 murata 45 muricata, Acasta 54 muricata, Stephanolepas 44 mylensis 51 nascanus 51 natalensis 45 navicula 55 nebrias 53 nefrens 49.30.31 neogenica 59 neuseelandicus 41 Newmanella 47,21 nigrescens, Megabalanus 68 nigrescens, Tetraclita 48 nipponensis, Chthamalus 41 nipponensis, Solidobalanus 51 nipponensis, Tetraclitella 46 nitida, Acasta 54,34 nitidus, Balanus 65 nivea, Chirona 50 niveus, Balanus.. . 65,64,62,31,100,101 Nobia 58,23,31 nonstriatus 65 nonsulcatus 65 noszkyi 59 Notobalanus 52,10,23 nubilus 60-6;,69,70,34,100,101 nubilus, group of Balanus 60-61, 69,70,23 obscurus 65. 101 obliquus 66 oblitteratus 43,32,100 occator 68,66,100 occidentatis 51 106 ochlockoneensis 66 octavus 57 Octomeris 40,17-19,31 oligoseptatus 61 ophiophilus 44 oppidieboraci 64 orbicellae 58 orcutti 53 orcuttiformis 53 oryza 49 oulastreae 59 Pachydiadema 40,17 Pachylasma, -inae 40,11,14,16-19, 22,29,31 pacified, Tesseropora 47,33 pacificus, Balanus 66,68,101 brevicatcar 66, 101 prebrevicalcar 66, 101 Paleocreusia 58 palaoensis 49 pallidas, Cantellius 57 pallidus, Balanus 64, 101 krugeri (see kondakoui) 101 stutsburii 64 panamensis, Balanus 102 panamensis, Chthamalus 42 panamensis, Tetraclita 48 pannonicus 69 pantanelli 49 parahesperius 51 parkeri 66 patellans, Balanus 64,100,101 patellaris, Tetraclita 48,100 patelliformis (see B. patellaris) . . . . 101 patula 45,44,32,101,102 dentata 44 pectinipes 54 peninsularis 68,69 pentacrini 52,34 perfecta, Tetraclita 48 perforatus, Balanus 66-67,100,101 altavellensis 67 angustus 67 chordatus 67 cranchii 67 fistulosus 67 mirabilis 67 perforatus, group of Balanus 66- 67,23 permitini 42 peruvianas 63,101 phineus 51 pictus 62 pilsbryi, Euraphia 41 typica 41 neuseelandicus 41 pilsbryi, Catophragmus 40 pilsbryi, Tessarelasma 46 pilsbryi, Tetraclitella 47 Platylepas 44,21 Platylepadinae 44-48,49,11,21 playagrandensis 64 plicatus, Actinobalanus 49 plicatus, Epopella 46 plicatus, Megabalanus 68 pliocenicus 66 poecilosculpta 63,64,101 poecilotheca 64, 101 poecilus 66 Pollicipes 17 polygenus 65 Polylepas 45 polymerus 40,31 polyporus 61 porata 54 porcatus 59 porosa 48 communis 48 nigrescens 48 viridis 48 praegustator 44 praespinulosa 58,59 prebrevicalcar 66 prefloridana 59 proinus 51 projectum 58, 100 proteus 61 Protobalanus 60 proripiens 55 Proverruca 11 provisoricus 66 pseudauricoma 51 Pseudoacasta 54,23 pseudopallidum 57 psittacus 68,31,34,101 chilensis 68 pugetensis 59,60 purpurascens 47,46,100,102 darwini 47 nipponensis 46 purpurata 54 Pycnolepas 11 pygmaeus, -a 55 Pyrgoma 58,55,57,59,23 Pyrgomatidae, -inae 58,11,13,23, 24,28,39,31 Pyrgomina 59 Pyrgopsella 58,23 Pyrgopsis 58 quadrivittatus 49 quadratoradiata 59 quarta 59 quinquevittatus 49 quintus 57 radiata 47,68 wagneri 47 radicifer. 50 Radiolites 61 rafflesi 63,101 ramosa 44 rangi 59 latum 59 raphanoides 61 rariseptatus 61 regalis 61, 101 reginae 45 remi 55 reticulatus 64,101,102 revilei 69 rhachianecti 45 rhizophorae 47,40 roonwali 53,100 rosa, Megabalanus 68 rosea, Chirona 50 rosea, Tesseropora 47, 100 rostratus 6i, 100 alaskensis 61 apertus 61 heteropus 61 dalli 61 rubescens, Balanus 61 rubescens, Tetraclita. 48 rufotincta. 48,31,100 rugosus 46 salaami 64 saltonensis 62,101 sanctacrucensis 59 sauntonensis, Balanus 69 sarda 54 Savignium 57,23 scabrosus 42 scandens 55 schafferi 54 Scillaelepas 17 scrutorum 61 sculptura 54 scutelliformis 43 scuticosta 54 scutistriata 40,31 secundus 57 seguenzai, Megabalanus 68 seguenzai, Boscia 59 Semibalanus, -inae 55-56,70, 11,22-24,38,25,28,30 semicanaliculatus 49 semota 54 Septimus 57 serrata, Acasta 54 serrata, Tetraclita 47, 100 sextus 57 shilohensis 69-70 similus 70 simplex 46 sinensis 61, 101 sinnurensis 56, 100 sinuatus 52 snelliusi 57 socialis 51 solida, Chelonibia 44 solidus, Solidobalanus 51 Solidobalanus 50-51,69,70,23,30 S. (Bathybalanus) 52,23,34 S. (Hesperibalanus) 51-52,23 S. (Solidobalanus) 50-51,23 sookensis 51 sordidus 52 southwardi 46, 108 spinifera, Acasta 54 spiniferus, Balanus 61 spinitergum 54 spinosa, Acasta 54 spinosus, Megabalanus 68 spinulosa 58,56,57,59,100 spongicola 66 pliocenicus 66 spongites 54, 100 sporillus 54 squamosa 48,47,102 depressa 48 formosana 48 japonica 48 milleporosa 48 panamensis 48 patellaris 48, 100 perfecta 48 rubescens 48 elegans 48 rufotincta 48, 100 viridis 48, 100 stalactifera 48 con finis 48 floridana 48 milleporosa 48 stellaris 49 miocenicus 49 stellula 58 stellatus. . . 42,40,41,43,13,100,101,102 bisinuatus 43 comutus 43 107 thompsoni 43 stenonotus 51 Stephanolepas 44,21 stokesii 59 Stomatotepas 44,21 straeleni 50 striata, Acasta 54 striata, Tubicinella 45 (Striatobalanus) 50 stubbingsi 57 stuchburii 40 stultus 68 morycowae 68 sturi 59 stutsburii 64,101,102 subalbidus 64,101 sublaevis 50 subquadrata, -us 47 sulcata, Acasta 54 anchoris 54 spinosa 54 sulcata, Octomeris 40.31 sumbawae 57 suturalis 61 suturaltus 64,101 symphylliae 58 taiwanensis 50 talquinensis 61 tamiamiensis 61 Tamiosoma 61 tanagrae 68 tantillus 51 tenuis 50 terebratus 49-50,34 radicifer 50 tenuivalvata 54 Tessaretasma 46,17,21 tesselatus 64,101 Tesseroplax 47,21 Tesseropora 47,21,22,33 testudinaria 44, 102 solida 44 Tetrabalanus 65,23 Tetrachthamalus 43,18,32,100 Tetraclita 46-48,11,13, 20,21.28,29,31 Tetraclitella, -inae. . . 46,47,11,21,38,31 Tetraclitidae. -inae 47,48,11,13 19-21,24,37,38 Tetrachaelasma 46,21.22,108 thompsoni, Chthamalus 43 thompsoni, Solidobalanus 51 tintinnabulum SS-69,61,66 100.101,102 communis 68 coosensis 61 occator 66,100 peninsularis 69 tongaensis 6,3 trachealis 45 transversa 44 transversalis 57 transversostriatus 69 transsylvanicus 69 tredecimus 57 tridacophylliae 57 triderma 46 trigonus 6630,100,101,102 trigonus, group of Balanus. . . 65-66,23 trolli 59 truncatus 49 tuberculatus 50 Tubicinella 45,21 tuboperforatus 70 tubulatus 69 tulipa 54 tulipiformis 69 arenarius 69 etruscus 69 tumorifer 70 typica, Euraphia 41 typica, Megabalanus 67 typica, Pyrgoma 57 uliginosis 64,65,101 umitosaka 54 unguiformis 50 undulata 54 unisemita 47 vadaszi 62 validus 69, 100 variegatus 64, 100,101 cirratus 64-65,63,101 tesselatus 64,101 varians, Balanus 41 varians, Chirona 50 varians, Solidobalanus 52 velutinum 46 veneticensis 70 venezuelensis 69 venustus 65,64.101,102 modestus 65, 101 niveus 65, 101 obscurus 65, 101 Verruca, Verrucomorpha 11, 12,15,16 vesiculosus 69 vestitus 52 vialovi 52 vinaceus 69 violaceus 70,62,101 viridis 48.100 vitiata 48, 100 vladivostokensis 63,65,101 volcano 6968.100 vulgaris 45 wagneri 47 wilsoni, Megabalanus 69 wilsoni, Platylepas 44 withersi, Balanus 60 withersi, Chthamalus 40,100,102 withersi, Euraphia 41, 19,100 wireni 47 africana 47, 100 pacifica 47 Xenobalanus 45,21,31 zealandicus 50 zebra 39 zuiho 54 108 Figure 17. The remains of Tetrachaelasma sp., blanket the sea floor at a depth of nearly 2000m on the flanks of a seamount off Madagascar (26°29'S, 46°07'E). The relatively primitive balanomorphoid Tetrachaelasma southwardi was first discovered by the R/V Eltanin in the Antarctic Basin, off southern Chile and off Cape Horn at comparable depths (Newman and Ross, 1971). It is the only balanomorphan known to occur in the abyss. The calcareous deposits depicted here, composed of more than 90% calcitic barnacle remains, including rostra up to 10 cm in length, represent the remains of animals that once Uved on the seamount and were subsequently concentrated in the valleys and gorges around its flanks. Other accumulations of comparable barnacle content occur in the fossil record, but these developed in situ in shallow water. Photo courtesy of Robert L. Fisher, Scripps Institution of Oceanography. W!#Wa *<*r'* y*l ^ .*^\ If.' :0-A* 'V '4i ~ 2 - '** '^?V y; «#„■ -tv- lX ^f' ^M •*w •' v^/ ;< v^' i-'- ^"^ K- ^W0-^A. y. r •ji5 - J '■^.r^: >V^.: r-^wL' 9^%5M t?**^ *'14 .V V^ rf- II ^. *i>. ?•' V J^/^/^. -..•L*, Date Due ACME BOOKBINDING CO., INC. NOV 28 1984 100 CAM8r;10G£ STREET CH^.RLESTOWN, MASS. 3 2044 093 361 145