MEMOIRS OF THE UEENSLAND MUSEUM BRISBANE VOLUME 32 29 JUNE, 1992 PART 1 ANOPSILANA BARNARDI, A NEW SPECIES OF ESTUARINE CIROLANID CRUSTACEAN ISOPOD FROM TROPICAL EASTERN AUSTRALIA NIEL L. BRUCE Bruce, N.L. 1992 06:29: Anopsilana barnardi, anew species of estuanne cirolanid crustacean isopod from tropical castem Australia. Memoirs of the Queensland Museum 32(1): 1-8. Brisbane. ISSN 0079-8835. Anopsilana barnardi sp.nov., the third species of Anopsilana recorded from Australia, is described from northeastem Queensland. A key to the Australian species is given anda list of all Anopsilana species is provided.[] Jsopoda, Cirolanidae, new species, northeastern Queensland, Southwest Pacific, taxonomy. Niel L. Bruce, Queensland Museum, PO Box 3300, South Brisbane, Queensland 4101, Anstralia; 10 January, 1992. Anopsilana Paulian & Deboutteville, 1956, con- tains thirteen species. Its occurrence is restricted to the tropical regions of the world; about half the species are recorded from troglobitic habits (both freshwater and euryhaline), the others are all recorded from mangrove or estuarine habitats. Anopsilana barnardi sp.nov. was taken from a mid-stream grab sample in the Murray River, and il is therefore not directly associated with mangroves as are the other Australian species of Anopsilana. Anopsilana Paulian & Deboutteville Anepsilana Paulian & Deboutteville, 1956: 87. Bruce, 1981; 955, fig. 5i-e; 1986: 196; Kensley & Schotte, 1989: 124; Brusca, Wetzer & France (in press). Troglocirolana Rioja, 1956: 447 [Type species: Cirolana cuberisis Hay, 1903, by monotypy]. Haitilana Notenboom, 1981: 314 [Type species: Haitilana radicicola Notenboom, 1981, original designation). TYPE SPECIES Anopsilana poissoni Paulian & Deboutteville, 1956, original designation. The location of the types was not given in the original publication, but was cited as at the Institute Scientific de Madagascar, Tsimbazaza, Antananarivo, Madagascar by Brusca et al. (in press). DIAGNOSIS Fronal lamina usually elongate (in two Pacific species as long as wide), antenor margin project- ing or sessile; pentagonal or with anterior margin rounded or truncate. Antennule with peduncular urticles 1 and 2 usually coalesced. Pereopods all ambulatory. Pleopod 2 of male with appendix masculina basally or sub-basally inserted, usually robust; endopods of pleopods 3-5 without plumose marginal setae. smaller than exopod; lamellar or thickened (A. barndardi, A. oaxaca). Mouthparts and other characters as for Ciralana. REMARKS Anopsilana, with little question, constitutes a polyphyletic assemblage of species, differing from Crrolana primarily in the lack of marginal setae on the endopods of pleopods 3 and 4. These endopods are also reduced in size in comparison to those of Cirolana and in at least two species are thickened or fleshy. Other minor differences, none of which are shown by all of the species placed in the genus, are the fusion of peduncular articles | and 2 of the antennule; article 3 of the antennule peduncle being proportionally longer than in Cirolana and the appendix masculina varying from being relatively robust to slender and basally inserted. Estuarine species tend to be well pigmented and have robust well-spined perecopods that are generally similar to those of the Cirolana ‘parva group’ or ‘tuberculate group’ of species. Troglobitic species have relatively more slender pereopods with, by comparison, reduced spina- tion. Additionally all the troglobitic species lack eyes, The distribution of the genus is restricted to tropical localities. The cavernicolous specics are from the peri-Caribbean region except for one species from Madagascar and one from Palau. The open-water species are all estuarine, tropical and all have been recorded from mangroves or in the vicinity of mangroves, with the exception of the poorly known Anopsilana luciae. Anopsilana pustulosa and A. willeyi have extensive Indo- Pacific distributions. Brusca ct al. (in press) report that A. brown? is widely distributed in the Caribb- wm can and also in the tropical East Pacific in suitable habirats, KEY TO AUSTRALIAN SPECIES OF ANOPSILANA |. Body with nodules on dorsal surfaces of pereon, pleon and pleotelson; pleotelson apex narrow- ly rounded; endopods of pleopods 3-3 lamel- Tarssrercevonvessaneusexcaistioniasistattorrevesrr={=yort=+ peta Body without dorsal ornamentation, pleotel- son apex wide, subtruncate; endopods of pleopods 3-5 fleshy............4. bdmmardl sp.nov, 2, Frontal lamina anterior margin rounded: pleote!- son abruptly narrowed; uroped rami wilh dense mass of marginal setae........ A. pustulosa Frontal Jamina pentagonal; lateral margins of pleotelson not abruptly narrowed; uropod rami With single rank of marginal SOEBE.yscyeasprpesvgueceecanseguysreparerrepsereepeeth, Weilleve Anopsilana barnardi sp.nov, MATERIAL EXAMINED HoLotyre: ¢ (5.4mm), Murray R., north Queensland, 18°14°S, 146°O1"B, 24 May 1978, salinity af 23-34%o, depth 1.5m, mid-esiuary, mud bottom, coll. P. Davie (QM W17263). PARATYPES: 1300 (2.9-5.7mm, m = 3.9m, 5.7mm specimen dissected), 142 2(35.0-5.9mm non-ovig, m=4.0mm; 6.4mm ovig), manca (2.7mm), same data as holotype (QM W17264), DESCRIPTION Male: Body about 2.8 times as long as greatest width; dorsal surfaces without nodules, unorna- mented, Cephalon with median rostral point visible in dorsal view; dorsal interocular furrow present; eyes together about 0.3 width of cephalon. Pereonite 1 about 1.6 times as long as pereonite 2; pereonite 2>3>4<5 = 6>7 in length; pereonite 7 shortest. Coxae of pereonites 2-7 each with distinet and entire oblique carina; coxae 4-7 with posteroventral angle becoming increasingly acute, Pleonite 1 concealed by pereonite 7; pleonite 3 with lateral margins posteriorly produced and overlapping lateral margins of pleonite 4 which are produced posteriorly beyond pleonite 5. Pleotelson 0.65 as long us anterior width; lateral margins convex, posterior margin subtruncate, provided with 8 (or 9, see Variation) spines, interspersed with 2 short setae between each spine pair, MEMOIRS OP THE QUEENSLAND MUSEUM Antenniile peduncle articles 1 and 2 fused, ar- ticle 3 about 1.2 times as long as fused articles 1 and 2; flagellum extending to middle of pereonite 1, with 8 articles, the distal 2 being minute, about 0.7 as long as peduncle. Antennal peduncle ar- ticle 4 about 2.5 times as long as article 3; pedun- cular article 5 about 1-2 times as long as 4; flagellum extending to pereonite 4, composed of about 17 articles. Frontal lamina pentagonal, ses- sile; lateral margins diverging anteriorly, Man- dible lacking lacinia mobilis; spine row with 9 spines; molar process very thin, with 13 or 14 teeth; palp article 2 with 12 serrate setae on dis- tolateral margin, article 3 with 14 setae distal 5 of which are longer than remaining 11 and feebly secrate, others obviously serrate. Maxillule with 12 spines on gnathal surface of lateral lobe; medial lobe With 3 stout moderately plumose spines, Maxilla with 5 long setae on lateral lobe, 9 long setac on central lobe, medial lobe with 4 stout plumose setae proximally, distally 6 simple setae, Maxilliped with simple setae only; endite with 2 coupling hooks and 4 plumose setae. Pereopod | basis with | long and 1 short seta at posterodistal angle; ischium with 2 setae al anterodistal angle, 2 small setae at posterodistal lateral margin and 1 spine at posterodistal medial Margin; merus with 4 short stout tubercular spines on Jateral posterior margin and 3th longer spine at posterodistal angle, posterior medial margin with 2 acute spines; carpus With single acute spine and 3 setae at posterodistal angle; propodus palm with 2 acute spines and third stout spine and 2 setae opposing dactylus. Pereopods 2 and 3 similar to 1 but less robust. Pereopod 2 ischium with 2 acute spines at anterodistal angle and 2 stout spines at posterodistal angle; merus with 2 large and 2 small spines at anterodistal angle, posterodistal margin with 6 blunt spimes in 2 clusters; carpus with 3 spines at posterodistal angle; propodus with single spine on palm. Pereopods 4-7 essentially similar, becoming longer posteriorly. Pereopod 7 ischium with group of 5 spines at anterodistal angle, posterior margin with 3 groups of spines; merus with clusters of 6 and 4 spines at distal angles, 3 spines set posteromedially; carpus with abundant spines on distal margin (about 13), 1 and 2 spines set on posterior margin; propodus with 2 pairs of spines on posterior margin; some spines on anterior mar- gins strongly pectinate: spines on posterior mar- gin all simple. Penes small, inconspicuous (only easily visible on dissected male paratype) papil- lae, set submedially on posterior of sternite 7. Pleopod 1 rami subequa! length, endopod slight- A NEW SPECIES OF ESTUARINE CIROLANID ISOPOD 3 FIG. 1. Anopsilana barnardi sp.noy. A-D, holotype. E-G male paratype. A, dorsal view. B, lateral view. C, frons. D, pleonites in lateral view. E, penes, ster- nite 7. F, antennule. G, antenna peduncle. Scale represents 2.0mm. ly less than half as wide (0.45) as exopod; peduncle about 1.8 as wide as long, medial mar- gin with 4 coupling hooks. Pleopod 2 with rami subequal in length; appendix masculina broad, 0.3 as wide as endopod, arising basally and ex- tending just beyond end of endopod. Pleopods 3-5 exopod with complete but faint suture; endopods fleshy and small, about 0.5 as wide and 0.7 as long as exopods. Uropod rami not extending beyond posterior of pleotelson, exopod 0.85 as long as endopod; exopod lateral margin with 9 spines, medial margin with 6; endopod lateral margin with 3 spines, medial with 7; peduncle with 2 spines at lateroventral angle; apices of both rami weakly bifid; both rami with plumose marginal setae among spines except for proximal three quarters of lateral margin of endopod. Female: Slightly larger than male, differs in secondary sexual characters, Brood pouch made up of overlapping oostegites arising from ster- nites 1-5; embryos within dorsally oriented infold- ing of sternites. Colour: Pale brown in alcohol, dorsal surfaces with brown chromatophores; eyes black. Size: Males average at 3.9mm, non-ovigerous females at 4.0mm. Variation: There is considerable variation in the number of spines present on the pleotelson and uropodal rami. The commonest spine counts are: pleotelson with 8 spines (47.6%) or 9 spines (33.3%), occasionally 7 or 10; exopod lateral mar- gin with 7-10 spines, 9 spines (50.0%) or 8 spines (35.7%) commonest; exopod medial margin with 5 (71.4%) or 6 (19.0%) spines; endopod lateral 4 MEMOIRS OF THE QUEENSLAND MUSEUM FIG. 2. Anopsilana barnardi sp.nov., male paratype. A, left mandible. B, right mandible, incisor. C, maxillule. D, maxilla, E, maxilliped, F, pereopod 1. G, pereopod 2. A NEW SPECIES OF ESTUARINE CIROLANID ISOPOD 5 FIG. 3. Anopsilana barnardi sp.nov., male paratype. A-D, pleopods 1-3, 5 respectively. E, apendix masculina apex. F, pereopod 7. margin with 3 (60%) or 4 (40%) spines, medial other Australian species by the lack of nodules or margin with 5 (15.0%), 6 (57.5%) or 7 (27.5%) other cuticular ornamentation. The pleopods of spines (the holotype, 10 males and 10 females Anopsilana barnardi have the endopod of were examined for spine counts). pleopods 3-5 far smaller than those of A. pus- tulosa Hale (see Bruce 1981, fig. 5i-l) or A. willeyi REMARKS Stebbing (see Bruce 1986, fig 138), and further- This species is easily separated from the two more the endopod is thickened and semi-opaque, MEMOIRS OF THE QUEENSLAND MUSEUM FIG. 4. Anopsilana barnardi sp.nov., male paratype. A, uropod. B, posterior margin of pleotelson. C, posterior ventrolateral angle of uropod peduncle. not lamellar. There are only two other Indo- TyPES: Zodlogisch Museum, Amsterdam. Pacific species of Anopsilana: A. lingua Bowman & Tliffe, 1987, which is a blind freshwater cave Anopsilana browni (Van Name, 1936) dwelling species from Palau, and A. luciae (Bar- nard, 1940) a poorly described estuarine species DISTRIBUTION: Brackish and freshwater; Carib- from South Africa. Anopsilana luciae differs by bean; Cuba and Belize; East Pacific: Costa Rica having a rounded projecting frontal lamina, a (Kensley & Schotte, 1989). narrow pleotelson apex and two longitudinal sub- median carinae on the pleotelson. It is possible Types: American Museum of Natural History, that some estuarine species currently placed in New York. Cirolana may prove to belong to Anopsilana when the pleopods have been examined. Anopsilana crenata Bowman & Franz, 1982 ETYMOLOGY ay DISTRIBUTION: Freshwater pool in a cave, Grand The species is named to honour the late Dr J.L. Cayman Island. Barnard who has made an immense contribution to the knowledge of Australian peracarid Crus- TYPES: Smithsonian Institution. tacea. Anopsilana cubensis (Hay, 1903) SYNOPSIS OF ANOPSILANA SPECIES DISTRIBUTION: Caves in several localities in Anopsilana acanthura (Notenboom, 1981) Cuba. DISTRIBUTION: Known only from a well in Haiti. TyPEs: Smithsonian Institution. A NEW SPECIES OF ESTUARINE CIROLANID ISOPOD 7 Anopsilana jonesi Kensley, 1987 DISTRIBUTION: Amongst mangroves, Belize. Types: Smithsonian Institution. Anopsilana lingua Bowman & Lliffe, 1987 DISTRIBUTION: Natural well on Peleliu Island, Palau, TYPES: Smithsonian Institution. Anopsilana luciae (Barnard, 1940) DISTRIBUTION: Estuarine, South Affica. Types: South African Museum, Cape Town. Anopsilana oaxaca Carvacho & Haasmann, 1984 DISTRIBUTION: Mangroves roots, Pacific coast of Mexico; also Clipperton Island (Brusca et al. in press). TYPES: Institute of Biology, National Autonomous University of Mexico. Anopsilana poissoni Paulian & Deboutteville, 1956 DISTRIBUTION: Mitoho Cave, southern Madagas- car. TYPEs: Not stated, but see type species entry after genus synonymy given here. Anopsilana pustulosa (Hale, 1925) DISTRIBUTION: Estuarine and mangrove habitats from East Africa to Australia; generally within the tropics (Bruce, 1986). Type locality: Cook- town, Queensland. TyPes: Australian Museum, Sydney, Anopsilana radicicola (Notenboom, 1981) DISTRIBUTION: Natural spring, Haiti- TyPEs: Zodlogisch Museum, Amsterdam. Anopsilana willeyi (Stebbing, 1904) DISTRIBUTION: Estuarine and mangrove habitats from East Africa to Australia, within the tropics (Bruce, 1986). Type locality: Sri Lanka (Steb- bing, 1904, as Ceylon). TYPES: Not located. LITERATURE CITED BARNARD, K.H. 1940. Contributions to the crus- tacean fanna of South Africa 12. Further additions to the Tanaidacea, Isopoda and Amphipoda, together with keys for the identification of hither- torecorded marine and freshwater species, Annals of the South African Museum 32: 381-515, BOWMAN, T.E. & FRANZ, R. 1982. Anopsilana crenata, a new troglobitic cirolanid isopod from Grand Cayman Island, Caribbean Sea. Proceed~ ings of the Biological Society of Washington 95: 522-529, BOWMAN, T.E, & ILIFFE, T.M. 1987. Anopyilana lingua, a new freshwater troglobitic isopod from the Palau Islands (Flabellifera: Cirolanidae). Proceedings of the Biological Society of Washington 100; 347-352. BRUCE, N.L. 1981. Cirolanidae (Crustacea: Ilsopoda) of Australia: Diagnoses of Cirolana Leach, Metacirolana Nierstrasz, Neocirelana Hale, Anopsilana Panlian and Deboutteville, and three new genera - Natatolana, Politolana and Car- tetolana, Australian Journal of Marine and Fresh- water Research 32: 945-966. 1986. Cirolanidae (Crustacea: Isopoda) of Australia. Records of the Australian Museum, Supplement 6; 1-239. BRUSCA, R.C., WETZER,, R. & FRANCE, S.C. (in press). A | monograph on the cirolanid isopods (Crustacea: Isopoda: Flabellifera: Cirolanidac) of the tropical eastern Pacific, CARVACHO, A. & HAASMANN, Y. 1984. Isopodos litorales de. Oaxaca, Pacifico Mexico. Cahiers de Biologie Marine 25; 15-32. HALE, H.M. 1925. Review of Australian isopods of the cymothoid group. Pt 1. Transactions of the Royal Society of South Australia 49: 128-185. HAY, W.P, 1903. On a small collection of crustaceans from the island of Cuba. Proceedings of the United States National Museum 26; 429-435, KENSLEY, B. 1987. Further records of marine isopod crustaceans from the Caribbean. Proceedings of the Biological Society of Washington 100: 559- 577, KENSLEY, B. & SCHOTTE, M. 1989. ‘Guide to the Marine Isopod Crustaceans of the Caribbean,’ (Smithsonian Institution Press: Washington, D.C.). 308pp. NOTENBOOM, J. 1981. Some new hypogean cirolanid 8 MEMOIRS OF THE QUEENSLAND MUSEUM isopod crustaceans from Haiti and Mayaguana (Bahamas). Bijdragen tot de Dierkunde 51: 313- 331, PAULIAN, R. & DEBOUTTEVILLE, C.D. 1956. Un cirolanide cavernicole a Madagascar [Isopode]. Mémoires de I’Institute Scientifique de Madagas- car. Série A, 11: 85-88. RIOJA, E. 1956. Estudios carcinologicos 35. Datos Sobre algunos isopodos cavernicolas de la isla de Cuba. Anales del Instituto de Biologia, Univer- sidad de México 27: 437-462. STEBBING, T.R.R. 1904. Gregarious Crustacea of Ceylon. Spolia Zeylanica, Bulletin of the Nation- al Museum, Ceylon 2: 1- 26. VAN NAME, W.G. 1936. The American land and freshwater isopod Crustacea. Bulletin of the American Museum of Natural History 71: i-vii, 1-535. SYSTEMATICS OF THE INTERTIDAL TRAPDOOR SPIDER GENUS [DIOCTIS (MYGALOMORPHAE: BAR YCHELIDAE) IN THE WESTERN PACIFIC WITH A NEW GENUS FROM THE NORTHEAST TRACEY B, CHURCHILL AND ROBERT J. RAVEN Churchill, T. B, & Raven, R, J. 1992 06 29: Systematics of the mtertidal trapdoor spider genus Idioctis (Mygalomorphae: Barychelidae) in the Western Pacific with a new genus from the Northeast. Memoirs of the Queensland Museum 32(1): 9-30, Brisbane. ISSN 0079-8835. The circum-tropical trapdoor spider genus Idioctis included 6 species from Madagascar, east to Hawaii. A new genus, Nihoa, endemic to the Leeward Islands, north of Hawaii, is named and now includes /diectis hawaiiensix Raven, 1988, endemic to Necker Island, and a further new species, Nihoa mahina sp.noy., endemic to Nihoa Island. Four new species of Idioctis from the Western Pacific are described: J. yerlata from north-eastern Australia; /. ferrophila from New Caledonia; J, marove from the Solomon Islands; and /. talofa trom Western Samoa, raising the number of species to nine, For the first time, the male of the type species J. helva Koch, 1874, from Fiji, is described, Variation in the shape of spermathecae in /dioctis is described. (]Chelicerata, Mygalomerphae, Barychelidae, systematics, phylogeny. Tracey B, Churchill and Robert J, Raven, Queensland Museum, PO Box 3300, South Brisbane, Queensland 4101, Australia; 3 February, 1992. Spiders of a number of genera occur beside the sea. However, only few are intertidal to that their burrows are covered at high tide, Best known among araneomorphs are Desis and Paratheuma (Desidae), the latter having been revised recently (Beatty and Berry, 1988). In contrast, spiders of only one mygalomorph genus, Idiectis Koch, 1874, are known to live in the intertidal zone. The genus /dioctis was first described by Koch (1874) including only f. kelva from Fiji. No refer- ence was made to the habitat. The first report of the intertidal habits of a barychelid was with the description of Idiactis littoralis Abraham, 1924, found in the intertidal mudflats of Singapore. Much later, 1. helva was recorded from the littoral zone in Western Samoa (Marples, 1951, 1955). Soon after, another species, Atrophonysia inter- tidalis Benoit & Legendre, 1968, (transferred to Idioctis by Raven, 1985) was collected and described from the littoral zone of Madagascar and the Seychelles. By 1988, six species of Jdioctis had been desenbed: the type species, /. helve from Fiji and Western Samoa (Marples, 1951, 1955): £ fit- teralis Abraham, 1924 from Singapore; J, inter- lidalis (Benoit & Legendre, 1968) from Madagascar and the Seychelles (Benoit, 1978); 1. amas Raven, 1988 from Christmas Island; /. entwetok Raven, 1988 from the Caroline and Mar shall Islands; and J. hawaitensis Raven, 1988 from the Leeward Islands, near Hawaii. After a revision of the genus (Raven, 1988), we discovered Jdioctis in the intertidal or littoral zones in northem Australia, New Caledonia, and the Solomon Islands. Three new species are described here. Concurrently, the first male and more females of the type species, J. helva, were taken from the type-locality of Ovalau, a small island of Fiji. Females of /. helva were also col- lected from the coast of the large island of Vanua Levu, Fiji. With this new material we conclude that a new species occurs in Westem Samos, We also document variation in spermathecae for the first time in barychelids. Raven (1988) noted that Jdiectis hawaiiensis differed from all other congeners in the wider stemmum, undivided spéermathecae, and relatively shorter eye group. Since then, material from another island in the Leeward Islands has proved to bea new species for which a new genus 1s here created. This new genus recognizes the plesiomor> phic nature of both J. fawaiiensis and its new sister species. MATERIALS AND METHODS All abbreviations are standard for the Araneae and explained in Raven (1984a). The width of the eye group or the median ocular quadrangle (ab- breviated as MOQ)is the distance between the hwo most separated points in a line orthogonal to the long axis of the spider. All measurements except those for eyes are given in millimetres. Eye meas- urements are taken from camera lucida drawings made at < 50 magnification; any error was taken as 0.02 mm, or 1mm on the enlarged figure. Eye interspaces, which are measured along a line join- ing the centres of the respective eyes, are given 35 10 MEMOIRS OF THE QUEENSLAND MUSEUM diameters of an AME. Presence of leg spines are specified by the number recorded with their posi- tion (rare niimber occurring in parentheses) al- though ranges can include zero. Spine positions are as follows: dorsal, if on or close to the midline; pro- or retrolateral, if spine bases are visible pro- or retrolaterally when viewed dorsally; ventral, if bases are visible when viewed ventrally, Spines are considered weak, and probably the equivalent of attenuate macrosetae of Coyle (1971: 329), if only marginally thicker than other setae on that surface. Despite being Weaker, they are treated as spines because their number and position suggest they are the weaker form of thick spines on other species. Descriptions of scopulae give the extent (measured from the distal end of the leg segment), the density of scopula hairs, and the number of rows of setae that part the scopula hairs. Acronyms for museums are: AMNH, American Museum of Natural History, New York; BMNH, British Museum (Natural History), London; NHW, Naturhistorisches Museum, Vienna; QM, Queensland Museum, Brisbane. Other museums are given in full, SYSTEMATICS Idjoctis Koch Idiectis Koch, 1874: 4&4 (type species by monotypy Idioctis helva L, Koch), Simon, 1892; 125; 1903: 914, Rainbow, 1912: 115, Roewer, 1942; 214. Bon- net, 1957; 2286, Bagnols, 1983; 129, Main, 1985: 12, Raven, 1985: 113, 1988: 2. Platnick, 1989: 93. Atrophonysia Benoit & Legendre, 1968; 330 (type species by original designation Alrophonysia inter- tidalis Benoit & Legendre), First synonymized by Raven, (985; 113. Brignoli, 1983: 130. Raven, 1985; 113, 1988; 2; Plamick, 1989: 93 DIAGNOSIS Idioctis can be distinguished from Jdiephthalma by the narrow sternum and nasrow fovea and ssetenre of a strong rastellum, and from other barychelid genera by the relatively short bat strongly trapezoidal eye group and a narrow ster- num. [t is also readily distinguished from Nihoa gen. nov, and many other barychelids in the pallid pattern-free abdominal dorsum and the elongate stemum. DESCRIPTION Carapace hirsute, without pattem. Fovea very broad, procurved or straight. Abdomen pallid, without pattern. Rastellar spines few in line over- hanging fang, not on raised mounds. Maxillac usually with c,18-20 cuspules on inner anterior comer} anterior lobe and posterior heel produced. Labium wide, without cuspules. Sternum long, narrow (aboul 1.5 times longer than wide, rarely wider), with small, marginal sigilla, if evident. Scopulae (2 ?) entire on metatarsi and tarsi | and I; for full length of prolateral face of metatarsi III and only rarely present elsewhere on segment; widely parted by setae on tarsi If; only narrow lateral bands of hair, if present. on tarsi IV; absent on metatarsi TV. Scopuliform bmsh present on the provemtral face of tibiae I and II of 2 2. Spines. Leg 1: fe d0-4; ti pO-1 v2-7; me rO-1. Leg 2: fe d0-4; ti pO-1 yO-4; me v1-2. Leg 3: fe p0-1, dO-5; @ p6-30; ti p(2), r(2), vO-7; me pO-3, 10-3, v0-13. & 4: fe dO-7; pa p3-16; ti r(2), vO-7; me p0-7, rO4, y2-9. Paired claws of 22 with teeth on lateral face (Fig. 3); claws of d¢ biserially den- tate. Tarsi with clavate and filiform trichobothna, 3: tibia I with prolateral spur and megaspine, more distal prolateral megaspine and associated cuticular ‘thumb’; palpal bulb pyriform, Inter- tidal, rarely in forests. CHECKLIST OF SPECIES Idivetis helva Koch, 1874, type species Fiji. fdiovtis eniwetok Raven, 1988 Caroline & Marshall Islands. ldioetis ferrophila sp.nov, New Caledonia, Airephenysia inrertidalis Benoit & Legendre, 1968 Madagascar, Seychelles, Idioctis littoralis Abraham, 1924 Singapore. Idiectis marove sp.nov, Solomon Islands « Idioctis talofa sp.nov. Western Samoa. Idioetis xmas Raven, 1988 Christmas L., Australia, Idioctix yerlata sp.nov. North-eastern Australia. DISTRIBUTION Spiders of the genus /dioctis are now known near beaches and in littoral zones in Fiji, Sin- gapore (Abraham, 1924), Western Samoa (Marples, 1951, 1955), Madagascar (Benoit & Legendre, 1968), Seychelle Islands (Benoit, 1978), Christmas Island (Indian Ocean, Raven, 1988), Marshall and Caroline Islands (Raven, 1988), north-eastern Australia, New Caledonia and the Solomon Islands, Habitats, life history observations and biogeography of the genus will] be discussed elsewhere- REMARKS This paper contains the first description of a ¢ of the type species. The diagnosis of Jdioctis given by Raven (1988) is correct save for the removal of INTERTIDAL TRAPDOOR SPIDERS 1 characters present only in J. hawaiiensis, here transferred to Nikoa, gen. nov. Idioctis helva Koch (Figs 2-6, Table 1) Idioctis helva L. Koch, 1874: 484, tab. 37, fig. 3 a,b. Hogg, 1901: 241-242, fig. 26a. Marples, 1955; 453- 454; Raven, 1988: 4, figs 1-5. MATERIAL EXAMINED LECTOTYPE: @, (here designated), Ovalau I,, 17°41°S, 178°50'E, Fiji, Mus. Godeffroy No. 8097, deposited in Zoologische Institut and Zoologisches Museum, Ham- burg. PARALECTOTYPES: | 2, 1] juvenile, same data, deposited in BMNH. OTHER MATERIAL TopotyPes: 1d, Nageledamu, Ovalau I., 17°41°S, 178°50°E, Fiji, in mangrove root, 14.x1.1988, T.B. Churchill, QM $11229. 592 9, Nageledamu, Ovalau I., Fiji, 14.xi.1988, T.B. Churchill, QM $12521-5; 62 9, Lota I., Vanua Levu, 16°46°S, 179°20°B, Fiji, 20.x.1988, T. B. Churchill, QM $12526-30. DIAGNOSIS Spermathecae two, each consisting of two short FIG. 1. Idioctis yerlata sp.nov., 2. TABLE 1. Leg measurements of Idioctis helva, 3. I ll ti IV 3.60 3, 2.56 3.36 1,92 144 1.76 3.04 2.16 3.52 2.32 2.16 2.96 1.36 1.20 1,20 12,24 9.52 12.80 Femur Patella Tibia Metatarsus Tarsus Total dissimilar lobes, ental lobe stout, ectal lobe slender. 2 2 with c.18 thorns on patella II. 4-5 teeth on paired claws of 2 2. Rastellum of ten thick (four as long as wide) coniform spines in short distal line. Preening combs absent, 6d. Tibia I with small distal spur and upeurved megaspine, prolateral face with distal tiangular cuticular process and short lower angular downcurved spine. Bulb pyriform; embolus broad, not spiralled; cymbium with two divided lobes. Two rows of teeth on all paired claws. TOPOTYPE MALE Carapace 4.36 long, 3.32 wide. Abdomen 4.16 long, 2.40 wide. Total length, 10. Colour in alcohol. Carapace and legs yellow brown, chelicerae red brown; abdomen dorsally grey brown with dark ‘V" dorsally showing loca- tion of heart; venter entirely yellow brown, CITBRETIN, 30 12 MEMOIRS OF THE QUEENSLAND MUSEUM FIG. 2. Distribution of /dioctis * and Nihoa & in the Western Pacific and Indian Ocean. 2aGum FIG. 3. Idioctis helva, scanning electron micrographs, paired claws, lateral view. a, b, leg 1, d (a), 2 (b). c, d, leg IV, 2. INTERTIDAL TRAPDOOR SPIDERS 13 FIG. 5. Idioctis helva, dorsal view of spermathecae of ? 2. a-d, g, Ovalau Island, Fiji. a, $12525. b, $12521. c, $12522. d, $12523. g, §12524. e, f, h-j, Lotu Island (Vanua Levu), Fiji. e, 12527. f, $12528. h, $12526, i, $12529, j, 12530. Scale line = 0.25mm. FIG. 4. Presence ™ and absence @ of Idiactis helva at coastal localities sampled in Fiji. ~ Bei ese ly ' FIG. 6. Idioctis helva, topotype ¢. a, cephalothorax and chelicerae, dorsal view, b, spinnerets, ventral view. c, eyes, dorsal view. d, sternum, maxillae, labium and chelicerae, ventral view. e, palpal tibia, cymbium, and bulb, retroventral view. f, tibia I, ventral view, showing distal spur and megaspine. g, tibia 1 showing spur, prolateral view. Scale line = 1mm (a), 0.5mm (b-g). id MEMOIRS OF THE QUEENSLAND MUSEUM Carapace, Uniform covering of short black bristles and fine grey hair, not obscuring cuticle; margins with longer setae and lower sclerotised shelf of hirsute chitin below main margin. An irregular row of 15-20 setae anteromedially; 2-3 pairs of fine setae; numerous thick setae between PME and ALE. Striae shallow, narrow, glabrous, Tecognised as areas intervening grey bush of hair. Fovea wide, recurved. Eyes, Tubercle distinct. Group occupies 0.45 of head-width. Three rows; back row recurved, Front line of lenses of AME just behind line of back of ALE and ‘iris' well back. Eye group front width, back width, length = 35:43:25. MOQ front width, back width, length = 21;29:14. AME: ALE-PME:PLE = 10:11:7:10. Eye inter- spaces: AME-AME, 0.5; AME-ALE, 0.5; ALE- ALE, 1.6; PME-PLE, 0.2; PME-PME, 1.8; ALE-PLE. 0.6. Chelicerae, Wide band of brown selae and grey hair prodorsally, two narrower bands laterally. Promargin with 8 evenly spaced teeth, basomesal- ly with 2 small teeth and 3 pranules. Inter- cheliceral tumescence absent. Rastelluin consists of 5 long thick pointed spines and c.5 thick sctae. Labium, 0,64 wide, 0,28 long. Cuspules absent. Labiosternal suture is two sigilla narrowed at their medial amet Mavillae. 1.04 long in front, 1.36 long behind, 1.64 wide; with c.S-8 pointed cuspules. Heel an- gular; anterior lobe distinct. Sternum. 2.16 long, 1.48 wide. Only posterior sigilla evident as rounded glabrous marginal areas. Legs. Formula 4123. All segments, especially femora, with mat of dark grey prostrate hairs; and erect black setae. All legs of similar diameter, Tibia 1 with small distal spur and upcurved megaspine, prolateral face with distal triangular cuticular process and short lower angular down- curved spine, Preening combs entirely absent. Scapula. Never so thick as to obscure cuticle, individual hair bases distinct. Tarsi I-III ventrally pallid, Tarsi:] and I entirely ventral, thin, entire, full length; TJ, thin, divided by 8-10 setac; 1'V, with 10-15 scopula hairs in narrow triangle on proximal prolateral face. Claw tufts smaller than claws. Metatarsi: I, thin for full length, distally cuticle is pallid; IL, similar but with single thick seta on ventrodistal edge; IL, proventrally with fight brush; [V, bare, Thorn spines: 10 on prolateral patella IE, Spines. Leg 1: fe d4, ti v3+2 megaspines; me v1 weak, distal. Leg 2: fe d3_ti v4; me v1 weak, distal, Leg 3: fe d4, #1}, pa p10 thorns, ti v5, me rl, v4. Leg 4: fe d6, rlw; tir2, v7w; me v3 4 4 thick setac. Paip: fe dSw. Claws, 2 full scooped rows of 8-10 teeth in each row on paired claws of leg [; claws of leg TV with 2 rows, 6 in each ovter row and 2 in each inner row. Trichobothria, In two rows, each of c.8 for 3/4 of ubiae; c.12 in proximally retrolateral row on metatarsi, distally row is irregular and trichae are longer; .c.3 clavate and 15 filiform on tarsi in band. Palp. Bulb pyriform; embolus broad, not spiralled, cymbium with two divided lobes, Spinnerets. PMS 0.20 long, 0,08 wide, 0.08 apart, c.0.18 of basal PLS in diameter. PLS basal, middle, apical, and total article lengths = 0.64, 0.26, 0.14, 1.04, respectively. DiSTRIBLUTION AND HABITAT i. helya is known from mangrove roots and trunks on Ovalau Island, east of Viti Levu, Fiji, and from coral rock on Lotu Island. south of Vanua Levu, Fiji. REMARKS Females of J. helva differ from those of other species by the wider configuration of the eyes and the smaller PMS. Spermathecae consist of two short almost amorphous lobes joined basally to form 4 common aperture. Males differ from those of I. eniwetok Raven by the absence of preening combs. Idioctis yerlata sp,nov- (Figs 1, 2, 7-9, Table 2) MATERIAL EXAMINED Houoryre: #, Cape. Tribulation, 16°05"S, 145°26'E, in mangroves, North Queensland, Australia, 28- 29.yiii.1988, R.J. Raven, T.B. Churchill, J.A, Gallon, QM 87213. PaRATYPES: 799%, Cape Tribulation, 16°05’S, 145°26°E, in mangroyes, North Queensland, 28- 29.viii, 1988, R.J. Raven, T.B. Churchill, J.A, Gallon, QM $7204-9, $7212, S11181. 1%, Noah Head, S. of Cape Tribulation, 16°08"S, 145°28'E, 30. viii. 1988, RJ. Raven, T.B. Churchill, J.A. Gallon, QM $7206. DIAGNOSIS Spermathecae with one large medial lobe and variable basal lobe ectally; basal lobe small with common atrium with lateral lobe or separate Jobe arising above base of medial lobe (Fig. 9). Three closely spaced teeth on cheliceral promargin near fang base. Numerous (28-30) thorn spines on prolateral patellae II]. 5-7 teeth on paired claws of INTERTIDAL TRAPDOOR SPIDERS 15 Cooktown Cape Tribulation Nosh Head Port Douglas Ellis B ach WeClifton|Beach \@® Yorkeys Knob FIG. 7, Presence of Idioctis yerlata sp.nov. at coastal localities sampled in Queensland, Australia; inset enlarged at right, presence fl and absence @, leg 1, Preening combs absent. Rastellum is 12-14 long curved spines. HOLOTYPE FEMALE Carapace 5.36 long, 4.40 wide. Abdomen 8.80 long, 5.28 wide, Total length, 16. Colour in alcohol and life. Carapace and legs yellow brown, chelicerae ted brown, abdomen uniform yellow brown. Carapace. Uniform cover of fine prostrate wavy grey hairs; 10-15 long erect setae on medial caput lateral of centre line; c.4 pairs of fine foveal bristles; 27 long erect black setae anteromedially; TABLE 2. Leg measurements of /dioctis yerlata, holotype 2 I Il Ti IV Palp Femur 3.28 288 2.24 344 2.64 Patella 2.48 2.32 1.84 2.64 1.84 Tibia 248 2.24 1.84 344 = 1.64 Metatarsus 1.84 1.76 1,12 2.80 Tarsus 136 1.20 088 1.20 1.52 Total 1144 1040 7.92 13.52 7.64 7 long black anteriorly directed bristles and numerous fine black setae between PME; 2 long recurved and 10-15 shorter black bristles between ALE; caput raised; striae distinct. Fovea broad, straight with recurved ends. Eyes. Tubercle low. Group occupies 0.33 of head width. Three rows; back row more or less straight. Eye group front width, back width, length = 44:58:34. MOQ front width, back width, length = 23:42:17. AME:ALE:PME:PLE = 7:13:7:15. Eye interspaces: AME-AME, 1.3; ALE-ALE, 3.4; AME-ALE, 1.6; PME-PLE, 0.1; PME-PME, 4.0; ALE-PLE, 1.6. Chelicerae. With moderately dense bush of black hairs dorsally and in lateral band, rastellum consists of 12-14 long strong spines; promargin of furrow with two very large and five smaller teeth, and six small teeth basally. Labium. 0.92 wide, 0.48 long, without cuspules, separated from sternum by narrow groove. Maxillae. 1.60 long in front, 2.04 long behind, 0.96 wide; with 6-9 spindle-shaped cuspules in it MEMOIRS OF THE QUEENSLAND MUSEUM FIG. 8. /dioctis yerlara sp.nov. holotype 2. a, cephalothorax and chelicerac, dorsal view. b, abdomen, dorsal view. c, eyes, dorsal view. d, sternum, maxillae, labium and chelicerae, ventral view, e, spinnerets, ventral view, f. abdomen, ventral view. Scale line = 2 mm (a, b), Imm (a), 1).Smin (c, ¢). close group on inner angle; anterior lobe indis- lunct, posterior “heel” produced. Sternmune. 3-12 Jong, 7.00 wide; sigilla evident as shallow depressions in margin. Legs. Formula 4123. Legs I and Il much thicker than TI] and [V; tarsi as fat as distal metatarsi. Dorsal tarsi and meiatarsi with pile of short straight grey hair. Tibia through tarsus IV asetose, almost glabrous, With numerous short coniform spines on prolateral patellae Tl. TV. Preening combs consist of group of 8 spines on metatarsi III, outer pair and middle pair long and slender, others short, thick; eight also on metatarsi I'V, two long slender setae separated by shorter spines on ventral edge of metatarsi TV. Scapula. Full and entire on metatarsi and tarsi I, Tl; divided by setae on metatarsi and tarsi III: one narrow prolatera) band on tarsi TV; elsewhere ab- sent. Palpal tarsal scopulac entire. Spines, No spines on tarsi. Leg 1: fe 0, (d11 (hick setae); ti pl weak, v7 weak; me v1 distally with thick bristle. Leg 2: me v2 distally lv with thick bristle. Leg 3: pa p28-30; tibia yl + Gw, me dis- toventral 2 long medial with 4 on cach side and one between 2 long. Leg 4: fe 0, pa p11-16, ti v5, me ©. Palp, ti v1 or v0. Claws, Paired claws with 5-7 teeth on ectally displaced keel on leg I; 3 teeth on leg I; 2 on leg IV; palpal claw without tecth. All paired claws extending beyond tufts, except on palp. Trichebothria. c-8 for 3/4 of tibiae: ¢,12 on metatarsi; 5 clavate and 12 filiforni on tarsi, Spermathecae, Two, each with one large medial and one ectal lobe, INTERTIDAL TRAPDOOR SPIDERS 17 FIG, 9. Idioctis yerlata sp.nov., dorsal view of sper- mathecae of 99. a, 87204. b, $7207. c, 87212. d, $7213, e, 11181. f, $7206, g, 87208. Scale line = 0.25mm, Spinnerets. PMS 0.48 long, 0.22 wide, bases 0.10 apart, c.0.24 of basal PLS in diameter. PLS basal, median, and apical total article lengths = 1.14, 0.60, 0.20, 1.94, respectively. DISTRIBUTION AND HABITAT Known only from mangroves and loose coral rubble in the intertidal zone near Cape Tribulation, north Queensland, Australia. A trapdoor burrow like that of /dioctis was noted in the intertidal zone on a mangrove tree just south of Port Douglas, about 30km north of Cairns, north Queensland. ETYMOLOGY The specific epithet is an aboriginal work mean- ing oyster, which is often the impression conveyed by the door of /. yerlara burrows. REMARKS Females differ from all species of /dioctis in the larger relative size (3.4 umes an AME diameter) of the ALE-ALE interspace, Idioctis ferrophila sp.nov, (Figs 2, 10-12, Table 3) MATERIAL EXAMINED Houotyre: 2, Port Boisé, 22°20'S, 166°59'E, New Caledonia, ironstone boulder in water on beach, 25.x.1988, R.J. Raven, T.B. Churchill, QM §13537, PARATYPES: 79 2, Port Boisé, 22°20'S, 166°59'E, New Caledonia, ironstone boulder in walter on beach, 25.x.1988, R.J. Rayen, T.B, Churchill, QM 812511-3, 512515-7, $13538; 32%, same data, 6,ix,1990, P. Goloboff, N. Platnick, R.J. Raven, AMNH. DIAGNOSIS Spermathecae with large medial lobe and short basal lobe with axes perpendicular, Thorn spines: c.30 on prolateral patellae IJ, c.11 small on proximal prodorsal patella ['V. 3-5 teeth on paired claws of g 2. Rastellum a line of 10 short conical spines, not on mound, on edge above fang. dd unknown. HOLOTYPE FEMALE Carapace 5,28 long, 4.12 wide. Abdomen 8.48 long, 4.88 wide. Tota] length, 17. Colour in alcohol and life. Carapace yellow brown with light brown mottling, chelicerae dark reddish brown-burgundy; legs, sternum, maxillae, and labium yellow brown; abdomen light yellow brown with slightly darker medial band over heart. Carapace, With fine gray hairs forming uniform covering; hairs become larger and paler on mar- gins and darker and thicker near anteromedial line. Striae glabrous, narrow, barely distinct. Narrow sclerotised and hirsute ledge below edge of carapace. Fovea very slightly procurved. About 10 thick and several finer anteromedial setae: two long setae between PME; 5-8 long recurved and several shorter setae and fine hairs between ALE. Clypeus absent. Eyes. Tubercle low. Group occupies 0.32 of head-width. Three rows; back row procurved. Eye group front width, back width, length = 44:55:32. MOQ front width, back width, length = 25:33:19. AME:ALE:PME:PLE = 10:14:8:14. AME- AME, 0.4, AME-ALE, 0.8, ALE-ALE, 1.7, PME- PLE, 0.3, PME-PME, 2.2, ALE-PLE 1.0. Chelicerae. Porrect with prodorsal and lateral bands of long fine hairs. Slight ridge parallels upper cheliceral face. Rastellum a line of 10 short conical spines, not on mound, on edge above fang. ; i Bi ae e* ind inte ial FIG. 10. Presence and absence @ of Jdioctis fer- rophila sp.nov. at coastal localities sampled in New Caledonia. 18 MEMOIRS OF THE QUEENSLAND MUSEUM =~ Sas Se PIG. 11, Idioctis ferrophila sp.nov., holotype 2 . a, cephalothorax and chelicerae, dorsal view. b, eyes, dorsal view. c, spinnerets, ventral view. d, sternum, maxillae, and labium, ventral view. Scale line = Imm (a, d), 0.5mm (b, c). Furrow promargin with 7 thick teeth, basomesally wath 1 minute and three small teeth, Labiwn. 0.88 wide, 0.44 long. Labiosternal su- lure a narrow groove. Maxillae, 1.52 long in front, 2.16 long behind, 1.04 wide; with c.4-6 cuspules on inneredge. Heel distinct; anterior lobe, indistinct. Sternum, 2.80 long, 1.88 wide, With slightly darker and thicker hairs on margin; otherwise fine grey hairs medially. Sigilla shallow, indistinct. Legs. Formula 4123. I, If thicker than II, IV. TABLE 3. Leg measurements of Idioctis ferrophila, holotype ? [ i 2.88 2.68 240 2.16 2.08 2,04 1.60 1.52 1.12 1,12 10,08 9.52 Palp 2.24 1.68 1,36 2.08 1.52 1.36 1.36 0.80 7.12 Femur Patella Tibia Metatarsus Tarsus Total 1.44 6.72 Covered with fine grey hairs mixed with black setae; fine ‘furry’ grey hairs form narrow band near trichobothria on tibiae and metatarsi. Metatarsi I, I with distinct darker pair of setae distoventrally. Thorn spines: c.30 on prolateral patellae [iI, c.11 small on proximal prodorsal patella IV. Scepula. Metatarsi and tarsi I, U1, full, entire but not obscuring cuticle and separate hairs distinct. Metatarsi: IIT, one wide band prolaterally, ventral- ly and retrolaterally with setae and spines; IV, absent. Tarsi: III, full, parted by band 6-8 setal rows wide; IV, only small cluster in proximal proventral corner. Spines. True spines only ventrally on palpal tibiae and distal metatarsi TIT, TV; 6-8 thicker setae on dorsal femora. Leg 1, 2: none except tibia v2 (w) and v4, respectively. Leg 3: thom spines plus, ti V6 (w), me v8 on distal edge plus 1 thick and 4 thinner medially. Leg 4: thorn spines plus, tibia v7 INTERTIDAL TRAPDOOR SPIDERS he FIG. 12. /dioctis ferrophila sp.nov., dorsal view of spermathecae of 2 2, a, $7211. b, §12513. c, 812517. S125 1. e,$12512. f,$13538. g,$13537. Scale line =0.25mm. (w); me, v8 distal (4 close enough to be almost a comb) and 3 thinner proximad. Palp, ti v5. Claws. 5 short (leg I) to 3 (leg TV) teeth on paired claws, palpal claw bare. Tufts dense, notenclosing claws, divided. Trichobothria. In 2 rows, each of c.6 for 3/4 of length of tibiae; c.6-7 in short diagonal row on metatarsi; 5 clavate and c.14 filiform on tarsi in two triangular bands, Trichobothria associated with fine grey hairs. Spermathecae. Two, each with two lobes, medial lobe broad, lateral lobe small digitiform. Spinnerets. PMS 0.22 long, 0.08 wide, 0.08 apart, c.0.12 of basal PLS in diameter. PLS length of basal, middle, apical, and total articles = 0.76, 0.22, 0.18, 1.92, respectively. DISTRIBUTION AND HABITAT Idioctis ferrophila is known from ironstone boulders on the beach at Port Boisé at the south eastern corner of New Caledonia. A trapdoor bur- row with a spider like that of Idioctis was noted in intertidal rocks just south of Goro, 5-7 km east of Port Boisé. The specimen was not collected. At both locations, the boulders and rocks had water around their bases at low tide. ETYMOLOGY The specific epithet is latin derived for iron (ferros) and greek love (philos) and relates to the original collection of this species from only ironstone boulders in southern New Caledonia. Idioctis talofa sp.nov. (Figs 2, 13-15, Table 4) MATERIAL EXAMINED HOLOTYPE: 2, Upolu, 13°55"S, 172°45'W, close to high tide mark, Western Samoa, B.J. Marples, BMNH 1974.129.1. PARATYPES: 29 2, Upolu, 13°55'S, 172°45°W, close to high tide mark, Western Samoa, B. J. Marples, BMNH 1974.129.2. 1492 and eggs from Nu'ulopa Islet, Western Samoa, B. J. Marples, BMNH 1974.135. 12, ‘Samoa’, 19,ii,1882, Kauf, Godeffroy collection in NHW. DIAGNOSIS Spermathecae two, each consisting of two similarly sized lobes. one lobe pointed. 18-20 thorn spines on prolateral proximal corner of patella I; c.9 on patella IV; prolateral distal corner of femur [V with 2-3 short spines. 4 teeth on all paired claws. Preening combs absent. Ras- tellum is 11 thick curved spines in single line with bases touching. HOLOTYPE FEMALE Carapace 5.00 long, 4.08 wide. Abdomen 7.17 long, 4.00 wide. Total length, 15. Colour in alcohol. Carapace orange brown, darker on caput, legs orange brown. Abdomen dorsally pallid with purplish tinge and ventraily pallid. Carapace. With light uniform covering of sil- very brown hairs, none in striae, light bush on margins, numerous brown bristles beside 10 thick and several smaller anteromedial bristles, 6-8 thick bristles between PME, c.10 between AME. Fovea distinctly procurved; clypeus absent. Eyes. Tubercle low, distinct. AME pigmented. Group occupies 0.35 of head-width. Three rows; front row widely separated from middle row, back row slightly procurved, Eye group front width, back width, length = 40:52:33, MOQ front width, back width, length = 24:35:19, AME:ALE:PME: |; | | STERN SAMOA 172°W. FIG, 13, Localities of Idioctis talofa sp.nov, in Wester Samoa ®- 20 MEMOIRS OF THE QUEENSLAND MUSEUM FIG. 14. /dioctis talefa sp.noy., holotype 2. a, cephalothorax and chelicerae, dorsal view. b, spinnerets, ventral view. c, sternum, maxillae, Jabium and chelicerae, ventral view. Scale line = 1mm (a, c), 0.5mm (b). PLE = 10;12:8:14. Interspaces: AME-AME, 0.5, AME-ALE, 1.0, ALE-ALE, 1.9, PME-PLE, 0.2, PME-PME, 2.4, ALE-PLE, 1.3. Chelicerae. Band of moderately long brown bristles prodorsally and narrower band laterally. Rastellum is c. 11 thick curved spines in single line hanging over long cheliceral edge, with bases touching. Furrow promargin with 8 teeth, all bases separate but most anterior teeth bases very close, basomesally with 6 small teeth. Labium. 0.92 wide, 0.84 long. Separated from sternum by narrow groove, Maxillae. 1.44 long in front, 1,96 long behind, 1.20 wide; with 5-8 pointed cuspules on inner angle. Heel rounded; anterior lobe just distinct. Sternum. 3.24 long, 1.96 wide. Widest between coxae J, Sigilla small, marginal, indistinct. Legs. With uniform covering of moderately long brown hairs, Scopula. Metatarsi and tarsi 1, [1 entire, full; metatarsi HI, only on proventral face; metatarsi TV absent; tarsi If with narrow band of 4-6 rows parting scopula; tarsi IV thin, short hairs, only on proventral face. Thorn spines: 18-20 on prolateral proximal corer of patella IM; c.9 on patella IV; prolateral distal corner of femur IV with 2-3 short spines. Preening combs absent. Claws, All paired claws with 4 distinct teeth; palpal claw bare. Claw tufts not enclosing claws. Spines. No true spines dorsally or laterally ex- cept for femora and patellae I, [V. Spines on ventral legs generally weak, strong only on distal metatarsi If] and IV but no so close as to form comb, Leg 1: ti p3, me-0. Leg 2: ti v3, me v1, Leg 3: pa pl&, ti vow, me v9. Leg 4, fe p3, pa p6, ti yvéw, me v5 short plus 4-6 thinner. Palp: ti pl, v4. Trichobothria. In two rows, each of c.11 for 3/4 of tibiae; c.9 in curving row on metatarsi; 3 clavate and c.15 filiform on tarsi. Spermathecae, Two, each consisting of two similarly sized lobes, one lobe pointed. INTERTIDAL TRAPDOOR SPIDERS 21 FIG. 15. Idioctis talofa sp.nov., dorsal view of sper- mathecae of @ @, a-h. Scale line = 0.25mm. Spinnerets. PMS 0.36 long, 0.12 wide, bases 0.06 apart, c.0.19 of basal PLS in diameter. PLS basal, middle, apical, and total article lengths = 0.74, 0.26, 0.18, 1.18, respectively. DISTRIBUTION AND HABITAT Known from laval rock on beaches on the island of Upolu, and the islet of Nu’ulopa, Western Samoa (Marples, 1955). ETYMOLOGY The specific epithet is a Samoan word meaning ‘welcome’, in appreciation of the warm reception given to TBC. REMARKS Differs from /. helva in the spermathecal lobes being equal in size, anterior most teeth in cheliceral margin not fused basally, and has 1-2 thorns on prolateral distal femur IV. Of the 17 adults examined, one from ‘Upolu’ has only 4-6 spines on prolateral patella III of both legs. In all others, the number varies from 10-20 on a single specimen. Idioctis marovo sp.nov. (Figs 2, 16-18, Table 5) MATERIAL EXAMINED HOoLotyPE: ?, Uepi Island, Marovo Lagoon, Western Province, Solomon Islands, Western Pacific, 8°27’S, 157°56’E, intertidal limestone beach rock, 7.vii.1990, T.B. Churchill, QM $17121. PARATYPE: 5@ ¢, same data as holotype, 7.vii.1990, T.B. Churchill, QM S17118-20, QM S17122, QM $17123. DIAGNOSIS Spermathecae two, each consisting of large ter- minally enlarged lobe with smaller one attached to the outer base of the former. Thorn spines: 25 TABLE 4. Leg measurements of Idioctis talofa, holotype 2 I Il Il IV 3.36 2.80 2.36 3.42 2.28 2.16 1.72 2.58 2.12 196 1.64 3.17 164 140 1.28 2.75 0.88 1.08 080 1.00 1.32 10.28 9.40 7.80 12.92 6.84 on prolateral proximal corner of patella III; 10-16 on patella IV; prolateral distal corner of femur IV with 5 short spines. 2-4 teeth on paired claws. Rastellum of 10 strong spines in single line with bases touching. Preening combs a whorl of spines on metatarsi II, 1V. ¢ ¢ unknown. Palp 2.52 1.64 1.36 Femur Patella Tibia Metatarsus Tarsus Total HOLOTYPE FEMALE Carapace 3.92 long, 2.96 wide. Abdomen 5.28 long, 2.96 wide. Total length, 12. Colour in alcohol. Carapace yellow brown, orange brown on caput; legs yellow brown; chelicerae red brown. Abdomen pallid but dorsal- ly with two purple brown markings at anterior and posterior ends. Carapace. With light uniform covering of sil- very brown hairs, none in striae; light bush on margins; numerous brown bristles beside 10 thick and several smaller anteromedial bristles, 6-8 thick bristles between PME, c.10 between AME. Fovea very slightly procurved. Eyes. Tubercle low, distinct. AME pigmented. Group occupies 0.48 of head-width. Three rows; front row widely separated from middle row, back row straight. Eye group front width, back width, length = 32:40:27 MOQ front width, back width, length = 21:27:13. AME:ALE:PME:PLE = 8:12:6:13. AME-AME, 0.8, AME-ALE, 0.9, ALE-ALE, 1.3, PME-PLE, 0.1, PME-PME, 1.9, ALE-PLE, 0.9 Chelicerae. Band of stiff silver bristles prodor- sally and two narrow bands retrolaterally. Rastel- Western Province eee tT Guadalcanal Way 12°8 168"E. I [SOLOMON ISLANDS== | 156°E. 160°E. 164°E. FIG. 16. Location of Jdioctis marovo sp.nov. at Uepi Island in the Western Province (inset), Solomon Is. ny MEMOIRS OF THE QUEENSLAND MUSEUM ay" HAT Ar i or WZ fa MH, AEN iA i A NN A Me iy fi 44/ f aie \ Un Ath 1 H | it ATARI Wy Wilh! i ¢ \ 4 1 LOREEN oR Te f PIG. 17, Idioctis marovo sp.nov. holotype ¥. a, cephalothorax and chelicerae, dorsal view. b, abdomen, dorsal view. c, abdomen, ventral view, d, stemum, maxillae, labium and chelicerae ventral view. e, eyes, dorsal view, f, spinnerets, ventral view. Scale line = 1mm (a-d), 0.5mm (e, £). INTERTIDAL TRAPDOOR SPIDERS 23 FIG, 18. Jdioctis marove sp.nov., dorsal view of sper- mathecae of ? 9..a, 817119. b, $17123. c, 817122. d, 317121. e, $17120. & $17118. Scale line = 0.25mm. lum of 10 strong spines in single line with bases touching overhang cheliceral edge. Furrow promargin with 7 teeth, all bases separate but most anterior teeth bases very close, basomesally with 4 small teeth, Labium. 0.64 wide, 0.28 long. Separated from sternum by distinct narrow groove. Maxillae. 1,00 long in front, 1.44 long behind, 0.76 wide; with 5 pointed cuspules on inner angle. Heel rounded; anterior lobe just distinct. Sternum, 2.24 long, 1.52 wide. Sipilla small, oval, and marginal, increasing in size posteriorly. Legs. With uniform covering of moderately long brown hairs. Scopula: metatarsi and tarsi I, U, entire, full; metatarsi I, only on proventral face: tarsi III, with band of 4-6 rows of setae parting scopula; metatarsi and tarsi TV absent. Thom spines: 25 on prolateral proximal corner of patella TH; 10-16 on patella IV; prolateral distal corner of femur IV with 5 short spines. Preening combs a whorl of spines on metatarsi IL, TV. Spines. No true spines dorsally or laterally but 3-5 long fine black setae on femora I. Spines on ventral legs generally weak, strong only on distal metatarsi Il and IV but no so close as to form comb. Leg 1: fe 0, pa 0, i v2w, me 0. Leg 2: fe 0, pa O, ti v2, me vlw. Leg 3: fe 0, pa p24 thorn TABLE 5. Leg measurements of /djectis marovo, holotype ? I Palp 4.64 3,60 4.16 3,12 2.48 1.84 3.20 2.64 2.84 2.32 2.40 1.60 1.68 14.88 12.80 4.88 3.28 3.28 2.56 2.32 16.32 Femur Patella Tibia Metatarsus Tarsus Total 2.08 10.56 spines, ti v2w, me v10, Leg 4: fe p5 thorn spines, pa p10-16, ti 0, me v7 in distal whorl. Palp, ti rl, v4 + 3w. Claws, Paired claws with 2-4 distinct teeth; pal- pal claw bare. Claw tufts just enclosing claws. Trichobothria, In two rows, each of c.11 for 3/4 of tibiae; c.15 in curving row that splits into two rows for the distal half on metatarsi; 6 clavate and c.16 filiform that split into two rows each two wide, two centrally and distally, on tarsi. Spermathecae. Two, each consisting of large terminally enlarged lobe with smaller one at- tached to the outer base of the former. Spinnerets. PMS 0,26 long, 0.14 wide, bases 0.06 apart, c.0.30 of basal PLS in diameter. Basal, middle, apical, and total article lengths of PLS = 0.74, 0.12, 0,14, 1,00, respectively. DISTRIBUTION AND HABITAT Known from limestone beach rock and the root bases of coconut trees in the littoral zone on the island of Uepi, in the Marovo Lagoon, Western Province, Solomon Islands. ETYMOLOGY The specific epithet is taken from Marovo Lagoon, Solomon Islands (where the spiders were collected), which has been nominated for World Heritage listing. In the face of increasing pressure from mining and logging activities, its pristine state is a credit to the wisdom of the local people. REMARKS Females of /. maroye differ from those of all other species except /. eniwerok in that patella III is clearly shorter than tibia III, and from 1. eniwetok in the presence of numerous thorn spines on patella I'v. Nihoa gen.nov. Raven & Churchill DIAGNOSIS Nihoa can be distinguished from Idioctis by the wider sternum, the medially located teeth on the paired claws of 2 and the absence of a second row of teeth on the claws of d d. The two genera are readily distinguished by the presence of dis- tinct pattern dorsally on the abdomen of Nihou, Nihoa also differs from both Idioctis and Idioph- thalma in the absence of a rastellum and from Rhianodes Raven in the absence of a groove on the anterior face of the maxillae, DESCRIPTION Carapace hirsute, without pattern. Fovea very 24 MEMOIRS OF THE QUEENSLAND MUSEUM broad, straight to slightly procurved. Abdomen with distinct pattem or mottling. Rastellum ab- sent. Maxillae usually with c.10-20 cuspules on inner anterior corner; anterior Jobe indistinct, posterior heel produced. Labium wide, without cuspules. Stemum long, narrow (about 1.4 times longer than wide, rarely narrower), with small, marginal sigilla, if evident. Scopulae (? 2) entre on metatarsi and tarsi I-DT, in distal half mixed with setae on metatarsi III, and one small tiangle proventrally on metatarsi IV, if present; dense and divided by narrow band of setae. Spines (rare value in parentheses). Leg |: femur, pO d0-4 10, patella, 0, tibia, p0-1 v2-7. me pO r0-1. Leg 2: femur, p0 d0-4 r). patella pO, tibia p0-1 y0-4, metatarsus 0 y1-2. Leg 3: femur pO0-1 JO-5 10, patella p6-30, tibia pO(2) rO(2) vO-7, metatarsus pO0-3 r0-3 vO-13. Leg 4: femur pO d0-7 r0, patella p3-16, tibia p0.d0.r0(2) v0-7, metatarsus p0-7 r0-4 v2-9, Paired claws of 2 ? with teeth on medial keel: claws of dd with or without one row of teeth. Tarsi with clavate and filiform trichobothria. d 3: tibia I with prolateral spur and megaspine, more distal prolateral megaspine and associated cuticular ‘thumb’; palpal bulb pyriform; embolic tip flanged. TYPE SPECIES Nikhoa mahina sp.nov. REMARKS Raven's (1988) inclusion of Idioctis hawaiien- sis in Idioctis was presumably based upon the notion that it was the only genus that could be on such remote islands. He did identify that the species was the sister group of all other /dioctis species but lacked data on the ¢ of the type species to confirm the generic diagnosis. DISTRIBUTION AND HABITAT Known from Nihoa Island in the northern group of the Leeward Islands from terrestnal habitats, INCLUDED SPECIES Nihoa mahina sp.noy,Nihoa 1, Leeward Islands, NW Pacific idioctis hawaitensis (Raven, 1988)Necker t., Leeward Islands, NW Pacific Nihoa mahina sp.noy, Churchill & Rayen (Figs 19-22, Table 6) MATERIAL EXAMINED HoLotyPe: o, Nihoa I., 22°10'N, 163°10°W. Leeward Islands, northwest Pacific Ocean, 40ft.(12.2m) above sea-level, on rocks near camp in moonlight, 15.11.1981, §. Conant, Bernice P. Bishop Museum, ParRaTyres: % (allotype), Nihoa I., 22°10'N, 163"10'W, Leeward Islands, Hawaii, in sleeping bag, vi.1981, S. Conant; 2, Nihoa L., 2.11.1981, drowned in seep pool, S, Conant; ¢, Miller Valley, Nihoa I, vi. 1982; all in Bernice P, Bishop Museum. DIAGNOSIS Paired claws of d ¢ with teeth. Upper cuticular process on tibia I of dd at base of spur. Sper- mathecae two coniform mounds. HOLOTYPE MALE Carapace 10.00 long, 9.67 wide. Abdomen 10.00 long, 6.83 wide. Total length, 24. Colour inalcohol, Carapace, legs and chelicerae red brown. Abdomen dorsally yellow brown with medial longitudinal discontinuous band of brown flanked laterally by somewhat paired, brown spots anteriorly and recurved brown bands posteriorly. Abdomen ventrally yellow brown with four small brown marks almost equidistant, centrally. Ster- num, maxillae, and labium red brown. Spinnerets yellow brown. Carapace. Fine silvery hairs form uniform covering intermixed with numerous setae; line of 6 thick-and several finer anteromedial bristles, and several thick bristles between ALE; striac glabrous. Fovea slightly procurved. Eyes, Tubercle low. Group occupies 0.24 of head width. Eyes in three rows. Eye group: front width, back width, length = 71:82:60. MOQ front width, back width, length = 44:60:31. AME:ALE:PME:PLE = 16:22:16:24. Eye inter- spaces: AME-AME, 1.1, AME-ALE, 1.0, ALE- FIG. 19. Localities of Nihoa in the Leeward Islands. N, mahina sp.nov. on Nihoa l. and N. hawaiiensis (Raven) on Necker I, INTERTIDAL TRAPDOOR SPIDERS 25 FIG. 20. Nihoa mahina sp.nov. holotype d . a, cephalothorax and chelicerae, dorsal view. b, eyes, dorsal view. c, sternum, maxilla, labium and chelicerae, ventral view. d, spinnercts, yentral view. e, abdomen, dorsal view. f, abdomen, ventral view. Scale line = 2mm (a, c, ¢, f), Lmm (b, d). ALE, 2.3, PME-PLE, 0,1, PME-PME, 2.4, ALE- PLE, 1.1. Chelicerae. With prodorsal and lateral bands of setae and fine silver hairs. Rasiellum only a line of 20-25 long pointed brisiles on distal edge. Fur- row promargin with 8 thick teeth and 3 smaller teeth; 12 small teeth basomesally. Intercheliceral tumescence absent. Labium. 1.76 wide, 0.72 long. Labiosternal su- lure a distinct groove. Maxillae. 2.96 long in front, 3.60 long behind, 1.60 wide; with c.12 cuspules on inner edge. Heel distinct; anterior lobe indistinct, Sternum. 5.60 long, 4.08 wide. Sigilla marginal, round, and posterior pair largest. Legs. Formula 4123. Tibia I with distal, prolateral spur and short megaspine; base of spur with broad cuticular process below which is one (rarely two) spine. Scopulate surface of tarsi pal- lid. Scopula. Leg 1, full, thick, entire and undivided on metatarsi and tarsi I, If. Leg IL scopula extends 26 MEMOIRS OF THE QUEENSLAND MUSEUM a a === s. FIG, 21. Nihoa mahina sp.nov. holotype ¢ . a, tibia I, prolateral view showing distal spur and megaspine, hair and scopula omitted. b, tibia I showing distribution of hair and scopula. c, palpal bulb. d, palpal tibia, cymbium and bulb, ventral view. e, palpal bulb. Scale line = 1mm (a, b, d), 0.5mm (c, e). to retrolateral side; metatarsi II], thin on distal half extending to prolateral side with setae intermixed; tarsi II, entire, thick with setae intermixed; metatarsi IV, with distal prolateral 1/4 with thin scopulae; tarsus ITV with setal band 2-4 rows across intermixed with thin scopulae. Spines. Leg 1: fe p2, pa 0, ti p2+2, v3+2, me 0. Leg 2: fe p2, pa 0, ti pl, v2, me 0. Leg 3: fe p2, 13, pa 0, p2+1w, ti p2, r2, v5, me p4, r5, v10. Leg 4: fe p2, d2, 12, pa 0, tir5, v10, me p6, r5, v17. Palp: pa 0, ti vl. Palp. Bulb with distally flanged embolus. Cym- bium with two deeply divided lobes, retrolateral face slightly convcave. Claws. 2-4 (leg I) to 0 (leg IV) teeth in medial keel on paired claws. Tufts dense, enclosing claws. Trichobothria. c.8 for half length of tibia, c.12 on metatarsi in single curving row; two bands each of c.4 small clavate and c.10 filiform on tarsi. Spinnerets. PMS 0.84 long, 0.36 wide, bases 0.32 apart, c.0.33 of basal PLS in diameter. PLS basal, middle, apical, and total article lengths = 1.12, 0.64, 0.52, 2.28, respectively. ALLOTYPE FEMALE Carapace 10.00 long, 8.33 wide. Abdomen 10.33 long, 7.33 wide. Total length, 25. Colour in alcohol. Carapace and legs orange brown, chelicerae red brown. Abdomen dorsally yellow brown with medial longitudinal discon- tinuous band of brown, flanked laterally by some- what paired, brown spots anteriorly and recurved brown bands posteriorly. Abdomen ventrally yel- low brown with four small brown marks almost equidistant, centrally. Sternum, maxillae, and labium orange brown. Spinnerets yellow brown. Carapace. Fine silvery hairs form uniform covering intermixed with numerous setae well developed between head region and fovea; striae glabrous; fovea straight; c.30 setae between AME, c.14 between PME, c.40 long setae along medial INTERTIDAL TRAPDOOR SPIDERS 27 A i Aye ny eit! NUG A My i el PANTY ii at Vai Ny il } FIG, 22, Nikoa mahina sp.nov. paratype %, a, cephalothorax and chelicerae, dorsal view. b, eyes, dorsal view, c, spermathecaé. d, sternum, maxillae, labium and chelicerae, ventral view. e, spinnerets, ventral view. f, abdometi, dorsal view. g, abdomen, ventral view. Scale line = 2mm (a, d, f, g), Imm (b, €), 0.5mm (c). caput; lateral edge of carapace with several anterior and posterior directed lines of setae with dense fine silvery hairs. Clypeus absent. Eyes. Tubercle low. Group occupies 0.30 of head width. Eyes in three rows. Eye group front width, back width, length = 72:81:55. MOQ front width, back width, length = 45:55:35. AME:ALE:PME:PLE = 20:23:12:25. Inter- spaces: AME-AME, 0.4, AME-ALE, 0.8, ALE- ALE, 2.6, PME-PLE, 0.1, PME-PME, 1.8, ALE-PLE 0.8. Chelicerae, With prodorsal and lateral bands of setae with fine silver hairs. Rastellum absent, c.35 strong bristles in line on distal edge. Furrow 2 MEMOIRS OF THE QUEENSLAND MUSEUM TABLE 6, Leg measurements of Nikea mahina, holotype 3 I II 833 «68.16 533 4.83 6.17 3.33 583 5.66 Tarsus 350 383 2.83 3,16 Total 29.16 27.8) 24.12 32.32 promargin with 8 thick teeth and 3 smaller teeth; 6 basomesal granules. Labium. 1.76 wide, 1.12 long. Labiosternal su- ture broad, Mazxillae. 2.72 long in front, 3.68 long behind, 1.60 wide; with c.10-12 cuspules on inner edge. Heel angular; anterior lobe, indistinct. Sternum. 5.44 long, 3,76 wide, Sigilla: anterior and medial pair not evident; posterior pair small, round, marginal. Legs. Thorn setae and preening combs absent. ‘Tarsi broad, tarsi I c.60% of length wide; tarsi IV distally incrassate, distal width c,1.4 times basal width. Scopula. Very dense on legs [, Ll: metatarsi and tarsi I, If, full, thick, entire, undivided; metatarsi U1, thin on distal half with thick setae intermixed; larsi TI, entire, thick with 3-5 setae intermixed; metatarsi IV, thin in distal prolateral 1/4, divided; tarsi [V, thick, full, divided by narrow setal band 2-4 rows across and few setae intermixed, setal brush dense distally. Spines. Leg 1,.0. Leg 2: 0, save ti pl. Leg 3: fe p2w, r2w, pa p2 thorns, Hi p2, rl. v3, me p3, r3, v7. Leg 4: fe 0, pa 0, tirl, v4, me p2, rl, v9. Palp, fe plw, pa 0, ti p3w, vow. Claws. 4 (leg I) to 0 (leg IV) teeth on paired claws on medial keel. Tufts dense, just enclosing claws, Palpal claw very small, curved, bare. _ Trichobothria, In wo rows each of ¢.8 for half length of tibia; c.11 on metatarsi in single curving row; c.3-5 clavate and 12-14 filiform in each of two bands on tarsi. Spermathecae. Two coniform mounds. Spinnerets. PMS 0.96 long, 0.44 wide, bases 0.16 apart, c.0.53 of basal PLS in diameter, PLS basal, middle, apical, and total article lengths = L.12, 0.44, 0.48, 2.04, respectively. Tl IV 6.16 9.50 4.83 4.83 5.00 6.83 5.33 68.00 Palp 3.50 3.16 3,33 Femur Patella Tibia Metatarsus 2.350 14,49 DISTRIBUTION AND HABITAT Known only from the island of Nihoa in the Leeward Islands, northwest of Hawaii. ETYMOLOGY ‘The generic name refers to the type locality. The species name is a Hawaiian word for moon, given TABLE 7. Leg measurements of Nihoa mahina, allotype 2 I Il 6.66 6.50 466 416 3.83 4,00 3.50 3,16 2.00 2.33 20.65 20.15 Ti IW 5.66 7.33 3.50 4.66 3.33 5.50 3.50 5.33 1.83 2.66 17.82 25.48 Palp 5.00 3.50 2.66 Femur Patella Tibia Metatarsus Tarsus Total 3.16 14,32 that the type specimen was collected in the moon- light. REMARKS Males of NV. mahina differ from those of WN, hawaiiensis in the presence of teeth on the claws of Jeg I and in the basal position of the cuticlar process on tibia I, Females differ in the coniform spermathecae, in having 4, rather than 2, teeth on the claws of leg I, and in the darker abdomen dorsally. Nihoa hawaiiensis (Raven), new comb, (Fig. 19) Idivctis hawatiensis Raven, 1988:6; Platnick, 1989-93, MATERIAL EXAMINED Hovotyre: d, Necker I., Leeward Islands, north-west Pacific, 23°35'N, 164°42’ W, B.H. Bryan Jr, 29.vi.1923, AMNH. PARATYPE; 9, same data as holotype, AMNH. OTHER MATERIAL The types and also from Necker I., Leeward Islands: 3, 23.vi.1982, S. Conant, 42 9, Annex Hill, alt. 82m., 24.vi.1984, S. Conant; all in Bernice P. Bishop Museum, Hawaii. DIAGNOSIS Paired claws of dd without teeth, Upper cuticular process on tibia of ¢ ¢ prolateral, well above spur. Spermathecae two long domed mounds. DISTRIBUTION, BURROW AND HABITAT The spiders were found under rocks in burrows on very sparsely vegetated hillsides on Necker Island, one of the Leeward Islands, northwest of Hawaii. SPERMATHECAL VARIATION IN /DIOCTIS This paper includes the first documentation of spermathecal variation in 3 genus of the family Barychelidae. Shape of spermathecae has been INTERTIDAL TRAPDOOR SPIDERS 28 used widely in mygalomorphs to distinguish be- tween species (e.g., Schiapelli & Gerschman de Pikelin, 1962; Forster & Wilton, 1968: Raven, 19$4a). As such, spermathecal shape has been considered a relatively stable and useful diagnos- tic character. Rarely are exceptions well sup- ported. In his excellent and detailed revision of fuagrus, Coyle (1988) showed extensive vana- tion in the shapes of spermathecae of one species, £, mexicanus. On the other hand, Rayen (1984b, 1990) found in the Aname macilata group (Nemesiidae) and Tritiame (Barychelidae). respectively, that spermathecae are almost con- stant within a species group. Moreover, Raven & Churchill (1991) noted that one shape is widespread in barychelid genera and may be the family synapomorphy. Among mygalomorphs, barychelids have received little attention from taxonemists or ecologists, presumably because they build cryptic burrows. They are also under-represented in museum collections. Hence, from the limited material available variation in shape of sper- mathecae has been unclear but assumed to be minimal. In /dioctis, we find that this variation is usually too great to be useful as a specific charac- ler on is own, even though it was stable in species of Encyocrypta . Recognition of amumber of species in which the shape of the spermathecae cannot be diagnostic muy seem unwarranted, In a major revision of Pacific barychelids (Raven & Churchill, in prep.), a plesiomorphic spermathecal shape has been identified and found to be widespread. However, as with /dioctis, barychelid males do show mutually exclusive differences where none were evident among their (unequivocally) conspecific females, Hence, interspecific differences can be sufficiently clarified with non-sexual somatic characters. ACKNOWLEDGEMENTS We sincerely dedicate this paper to Ms Julie Gallon, who assisted with the collection of /diactis yerlata, Julie has been missing since 2 August, 1990, and we will continue to miss her dearly, This research, visits to European museums, and collec- trons made in New Caledonia, Fiji, the Solomon Islands, and Singapore were funded by an Australian Research Council grant to RIR, The authors are indebted to the generous hospitality of Dr Jean Chazeau of O.R_S.T.0.M,, Nouméa, New Caledonia. Ms Clare Bremner and Mrs Bronwyn Mitchell made the excellent figures 1, 8, 11, 14, 17, 20-22; RJR did the rest. We kindly thank Mr Joseph Koh, and Associate Professor Dennis Mur- phy of the University of Singapore, for their hospitality and assistance to RJR in acquiring comparative material of J. Jittoralis. Mr John Ravenscroft kindly assisted in the search for /diac- tis helva, in Fiji, We are grateful to Dr G, Rack, Zoologisches Institut and Zoologisches Museum, Hamburg, for the loan of types of Idioctis heiva, to DrJ. Gruber, Naturhistorisches Museum, Vien- na, and Mr P.D. Hillyard, British Museum (Natural History), London for the loan of Idiactis, material from Samoa, and to Ms Sabina Swift, Bernice P. Bishop Museum, Honolulu, for send- ing the new material of Nihoa. The invitation of Dr Harry Pamaby to TBC to accompany the Australian Museum expedition to the Solomon Islands is gratefully appreciated. TBC warmly thanks the local people of the Marovo Lagoon area for their co-operation and hospitality. We are grateful to Dr S. Conant for data on habitats of Nihoa mahina and Nihoa hawaitensix in Hawaii. LITERATURE CITED ABRAHAM, H.C. 1924. Some mygalomorph spiders from the Malay Peninsula. Proceedings of the Zoological Society of London 1924: 1091-1124. BEATTY. J.A. & BERRY, JW. 1988, The spider genus Peratheuma Bryant (Araneae: Desidae). Journal of Arachnology 16{1): 47-54. BENOIT, P.L.G. 1966. Les Barychelidae- Barychelinae africains et malgaches (Aran,-Or- thogn.}. Revue de Zovologie et de Botanique Africaine 74(3-4):209-241, 1978, Contributions a l'étude de la faune terrGstre des iles granitiques de l'archipel des Séchelles Mis- sion P. L. G. Benoit-J. J. Van Mol 1972 (Araneae Orthognatha). Revie Zoologique Afvicaine 92(2):405-420, BENOIT, P.L.G. & LEGENDRE, R. 1968, Un barychélide nouveau du Madagascar: Atraphonysia intertidalis gen. sp.nov, (Arancac— Orthognatha), Revue de Zoologie et de Botanique Afficaine 77(3-4):329-334 BONNET, P. 1957. ‘Bibliographia Araneorum— (Douladoure: Toulouse), 2 (3rd part); 1927-2026, BRIGNOLI, P.M. 1983, ‘A catalogue of the Arancac described between 1940 and 19817, (Manchester; British Arachnological Society). i-xii, 1-755. COYLE, F,A. 1971, Systematics and natural history of the mygalomorph spider genus Antrodiaetus and related genera (Araneae: Antrodiaetidac). Bulletin of the Museum of Comparative Zoology 141, 269-402, 30 MEMOIRS OF THE QUEENSLAND MUSEUM 1988. A revision of the American Funnel-web mygalomorph spider genus Evagrus (Araneae, Dipluridae). Bulletin of the American Museum of Natural History 187:203-292. FORSTER, R.R. & WILTON, C.L. 1968. The spiders of New Zealand. Part II, Ctenizidae, Dipluridae and Migidae, Otago Museum Bulletin 2:1-180. HOGG, H.R. 1901. On Australian and New Zealand spiders of the suborder Mygalomorphae. Proceed- ings of the Zoological Society of London 1901(2):218-279, KOCH, L. 1874. ‘Die Arachniden Australiens, nach der Natur beschrieben und abgebildet”, Vol.1, pp.473- 576. (Raspé: Niimberg). MAIN, B.Y. 1985. Mygalomorphae. In Walton, D.W. (ed.), “Zoological Catalogue of Australia, 3. Arachnida; Mygalomorphae, Araneomorphae in part, Pseudoscorpionida, Amblypygi, and Palpigradi’, (Australian Government Publishing Service:Canberra). i-x + 1-183, MARPLES, B.J. 1951. Mygalomorph spider in Samoa. Nature, London 168;300-301. 1955. Spiders from Western Samoa. Journal of the Linnean Society of London, Zoology 42:453-504. PLATNICK, N.I. 1989. ‘Advances in Spider Taxonomy 1981-1987: A supplement to Brignoli’s A catalogue of the Araneae described between 1940 and 1981’. (Manchester University Press: Manchester), i-vii + 1-673. POCOCK, R.]. 1903. On the geographical distribution of spiders of the order Mygalomorphae. Proceed- ings of the Royal Society of London 24(1):340- 368, RAINBOW, W.J, 1911, A census of Australian Araneidac. Records of the Australian Museum 9(2):107-319, RAVEN, R.J. 1984a,. The Australian curtain-web spiders (Ischnothelinae: Dipluridae: Chelicerata), Australian Joumal of Zoology, Supplementary Series 93:1-102. 1984b. A revision of the Aname maculata species group (Dipluridae, Araneae) with notes on biogeography, Journal of Arachnology 12:177- 193, tables 1-5, 1985. The spider infraorder Mygalomorphae (Araneae): cladistics and systematics. Bulletin of the American Museum of Natural History 182. 21-180, tables 1-9. 1988. A revision of the mygalomorph spider genus Idioctis (Araneae, Barychelidae). American Museum Novitates 2929: 1-14, 1990. A revision of the Australian spider genus Trit- tame Koch (Mygalomorphae: Barychelidae) and a new related genus. Invertebrate Taxonomy 4: 21-51. RAVEN, R. J. & CHURCHILL, T.B. 1991. A revision of the mygalomorph spider genus Encyocrypta Simon in New Caledonia (Araneae: Barychelidae). In Chazeau, J. and Tillier, S. (eds), ‘Zoologica Neocaledonica’. 2. Mémoires du Muséum national d’ Histoire naturelle, A, 149:31- 86. ROEWER, C.F. 1942. Katalog der Araneae. (Paul Budy Bd.: Bremen) 1:i-viii + 1-1040. SCHIAPELLI, R. D. & GERSCHMAN DE PIKELIN, B.S. 1962. Importancia de las espermatecas en la sistematica de las arafas del] suborden Mygalomorpha. Physis (Buenos Aires) Secc. C, 23 (64):69-75, SIMON, E, 1892, ‘Histoire naturelle des araignées’. 1(1): 1-256. (Roret: Paris). 1903, “Histoire naturelle des araignées’. 2(4) Supplément Général :875-1080. (Roret: Paris). SHIPWRECK AND HISTORICAL SURVEY: CHILCOTT ISLET. CORAL SEA R.A. COLEMAN Coleman, R.A. 1992.06 29: Shipwreck and historical survey: Chilcott Islet, Coral Sea. Memoirs of the Queensland Museum 32(1); 31-53, Brisbane, ISSN 0079-8835. Many Coral Sea recfs appearing on modern charts were first discovered by unsuspecting sailing ships that struck the reefs and were wrecked in the | Sth and 19th centunes. [n 1845 the teak, India-built barque, Coringa Packet, was totally wrecked on a reef surrounding a small sand islet subsequently named Chilcott Islet after the ship’s Captain. In the Jate 1870's, Chilcott Islet was briefly mined for guano (phosphate) by F.B. Beaver & Co, of Melboume. During 11-12 December. 1991. the author located wreckage believed to be the remains of Coringa Packet and conducted a brief preliminary s , The wreck is considered to be archacologically significant because of its potential to illustrate technical detail of a poorly-documented vessel type (‘Country vessel’/Opium Clipper) and of Indian shipbuilding practice during the first half of the 19th century. [_| shipwreck, Indian shipbuild- ing, guano mining, archaeology, history, Coral Sea. R.A. Coleman, Queensland Museum, PO Box 3300, South Brisbane, Queensland 410), Ausiralia; 14 January, 1992, The Coringa Islets, comprised of Chilcott Islet and South West Islet, lie respectively in 16°57°S by 150°00°E and 16°59°S by 149°53'E in the Coral Sea. The group is named after the sailing barque Coringa Packet, which was wrecked there in 1845. Chilcott Islet, where the wreck actually occurred, is named after the ship's Captain, F. Biggar Chilcott. The Coringa Islets are within the Cormga- Herald National Nature Reserve which was proclaimed under the National Parks and Wildlife Conservation Act 1975 on 16 August, 1982. The Reserve is managed by the Australian National Parks and Wildlife Service {(ANPWS). The Queensland Museum administers the Com- monwealth Historic Shipwrecks Act 1976 in the Commonwealth Coral Sea Territory on behalf of the Department of Arts, Sport, Environment, and Territories (DASET). An essential administrative duty of the Museum, under the Act, is to locate, identify and assess the Australian maritime heritage resource and make recommendations to the Minister for its better appreciation, protection and preservation, On the basis of archival research, it was deter- mined that the Cerixga Packer wreck had the potential to meet criteria for additional protective measures and warranted preliminary field inves- tigation. An opportunity was presented for the author and a volunteer assistant to join a multidisciplinary scientfic charter organised by Dr James Charley of the Botany Department, University of New England, Armidale, Dr Charley obtained the necessary permit to conduct scientific research within the Reserve. The charter vessel, TSMV Kanimbia was to visit a number of reef and islet systems in the area including Lihou, Tregrosse, Diamond, Magdelaine, Coringa and Herald for a total voyage time of fourteen days, Although it was intended to Jocate and examine two nineteenth century wrecksites at the eastern end of Lihow Reef, whilst there bad weather caused the abandonment of that part of the pro- gram. However, the position of a recent, uniden- tified wreck was noted but persistent rain squalls prohibited our approaching the site with safety. Only its two masts and central stack are visible above water and it appears to be a cargo vessel ar bulk carrier of approximately 120-150m in length. The condition of the mast tops suggest that the wreck occurred within the past 10-20 years. Whilst ashore at Turtle Islet, Lihou Reef, material was discovered on the beach near the waterline at the northern end, which may warrant an investigation of the surrounding reef when the opportunity presents itself. The material consisted of a stone (suggestive of ship’s ballast), a lip fragment of anineteenth century bottle, an uniden- tified small circular copper attachment plate and seyetal small pieces of iron (which were sugges- tive of hoop iron from wooden casks). Our main objective was to locate and examine the wreck of the Coringa Packet at Chilcott Islet. Due to the constraints of a very tight schedule, only one and one half days could be spent there, onc third of which time was only partially produc- 32 MEMOIRS OF THE QUEENSLAND MUSEUM “, \CORAL | CORINGA-HERALD NATIONAL \ NATURE RESERVE 43 ee LIHOU REEF NATIONAL NATURE RESERVE Ss -\_ ISLANDS bee: ‘ a ~~ TERRITORY \ Dione fe =e LS SS AUSTRALIA FIG. 1. Location of Coringa-Herald National Nature Reserve. 33 CHILCOTT ISLET SHIPWRECK AND HISTORICAL SURVEY “QATOSAY SU} UIYIIM S}a[s] BSULIOD Jo VOLO] ‘7 ‘OLA bbodt Asowsay Spueys] eas je109, wemse re Meret jeuolieR pyesoy-e6uui0Z Saulawor! i" (era ol “Mo ies 906 Aep 1se3 4) ) SAW) INIVTIGDVI 4 MEMOIRS OF THE QUEENSLAND MUSEUM live due to hazardous ses conditions on the reef flat. HISTORY OF CORINGA PACKET Today, little is known of the early history of the Coringa Packet. However, shortly after the Britsh Expeditionary Force was sent to resolve the opium issue in China in 1840 (an action now generally referred to as the ‘Opium Wars’), she was for a period engaged in the Opium Trade. At that time she was described as being rigged as a bri 2: The vessel, under the command of F, Biggar Chilcott, arrived in Sydney on 11 March, 1845 and anchored off Campbell’s Wharf having departed Calcutta the 11th December, Madras the Sth January, Trincomalee the 14th January, and Hobart Town the 2nd March. She carned twelve passengers and a general cargo.” Advertisements in the Sydney Morning Herald during March, 1845 announcing her availability for cargo for Ceylon and Madras described the vessel as ‘Teak Built’. ‘These items of information suggest that she was built and registered in India, probably Calcutta, as YOR CEYLON AND MADRAS. 7 - FENHE TEAR WARQLE CORINGA PACKET, Captaln Chileett: wil. sail for the abort porte about the let April For freight or passage spply to the Ceptais, on board; ur fn ‘ mls LYALL, SCOTT, YN CO. FIG. 3. Advertisement in the Sydney Morning Herald during March 1845 a “Country Vessel’ (India based, under European, American, or Parsee ownership: a concession begrudgingly given by the East India Company, which had earlier held the monopoly on East In- dian wrade.). Correspondence subsequent to her wreck, and the quantity of return cargo belonging to Chileon, suggests thai she was owned by Chil- colt and possibly under charter to the Honourable East India Company as an ‘Extra Ship’, This would explain why she was not listed in Lloyd's Register. The H.E.I, Co. maintained its own in- surance, Phipps * fists most ships built in, and operating from, India up to 1839. He makes no mention of Coringa Packet, which may have been built in 1840-1, For reasons explained Jater in this report, it is important to discover where the ship was built and archival research will need to continue into the problem. ' When Coringa Packet departed Sydney bound for Ceylon and Madras with a mixed cargo and a consignment of mail on 26 April, 1845, she was listed as a 230 ton barque. Four passengers were officially recorded as being on board: Lieutenant Blackhall, Ensign Bloomfield, Mr E. Lord, and Mr Henry Wan Deerlin. A large part of the craw were Indian seamen or ‘Lascars’ making a total com- plement of forty. Lyall, Scott, and Company acted as her agents in Sydney. Chilcott, upon his arrival in Sydney, had been the bearer of correspondence addressed to the prominent pastoralists and horse breeders James and William Macarthur of Camden from their agent in Calcutta, G.A. Plaistowe and the auction house, Cockerell and Company. The Macarthurs had found a ready market for good horses among the officers of the Bengal Army and other affluent Europeans in India and had recently sent a ship- ment to Calcutta on the East Indiaman Blundell, Plaistowe reported, *...there appears a greal demand for these horses, and they have been ex- pected and talked of, three months before our arrival, and 1 hope they may go off well. Auction sales appear the best and most fair way of each horse attaining its value, and it is arranged that the 16th and 2131 December, be the days of sale - half each day. I could sell several privately, well, but! find that would prejudice the remaining ones aj auction, wherein purchasers Would say the best had been taken, and the culls, only, sold publicly. lam advised, also, from Cockerell’s House, to such a course.’ ‘Good horses will sell well here, but itis great folly in shippers sending unbroken horses. The first question | am asked here, speaking of horses - What kind of cattle? Are they broken fo saddle, side-saddle, hamess, double or single? I have hor- ses that are not broken upon the Catalogue; then, they say, What a pity - you should always bring horses here, thoroughly broken, and they will meet ready sale and realise good prices.’ Chilcott was not slow to realise the potential for profit and when Coringa Packet finally cleared Sydney Heads there were three horses on board as part of the cargo consigned under the Captain’s name, His speculation may have been influenced by one of his passengers, Lieutenant Blackhall,, who had been sent to Australia to inyestigate the potential supply of horses and other livestock to the British military in India. CHILCOTT ISLET SHIPWRECK AND HISTORICAL SURVEY 35 What then took place is best described by Chil- cott himself; ‘On the Sth May, passed Wreck Reef: the wind hanging far to the eastward prevented us from weathenng Alert Reef and shoals in the vicinity; bore away to the westward to clear these dangers.” ‘May 7. Passed through the group of islands knowo by the name of Tregoss’s Islands {Diamond Islets in the Tregrosse reef system]; shaped a course N.W. by W. with the intention of sighting Lizard Island, and at 9:45 P.M. while sailing at the rate of eight Knots an hour, the ship struck with a tremendous crash, on a reef, and slewed broadside on; sounded the well, found seven feet water -cul away the mast and let 20 the anchor, for fear the ship might beat out into deep water and sink, as we could nel make oulanything about us buta foaming sea: the vessel] continued striking yrolently, and the sea making a complete breach over all, and, as you may suppose, daylight was most anxiously looked for; and to our great joy, a small island or sand bank was observed to the S.W., distance about half-a-mile; (fortunately the mast had gone over the side without injury to the boats). We then rigged a pair of shears, and with great difficulty got the long boat out; all hands next employed in procuring water and provisions, and Landing it on the island” “At night, all hands left the wreck, and slept on shore; at daylight, went again to the wreck, which we found had suffered much during the night, and got the water and provisions out; remained on the island until the 21 stof May, when we then decided to man the three boats and proceed for Torres Straits, in the hope of falling in with Her Majesty's ship Fly, or secking some means for the rescue of the remainder of the crew left on the island, com- posed of twenty-four souls. We left on the tsland 800 gallons of water, and provisions sufficient for four months; and T trust, ere that time expires, stime measures will be taken to remove them- *..We had a boisterous passage in the boats, from the wreck to the Barrier Reef, and lam sorry tosay, we Lost the gig, which upset on the night of the 23rd, and Mr. E. Lord, passenger, was drowned; the remainder of the crew were picked up by myself and the cutter, under the charge of the chief officer,” Chilcott and his group of fourteen sailed the remaining two boats through the Barrier Reef to Booby Island, on the western side of the Torres Swait, arriving on the 31st. There, they not only found sustenance in the cave Jater known as the ‘Post Office caye', but anoiher group of shipwrecked people. These were the survivors of the Hydrabad which had been wrecked a few days earlier near Murray Island and who had arrived! at Booby the day before.® Tt was immediately obvious to Chilcott and Cap- lain Robertson of Hydrabed that although a ship might be expected to call into the island al any time, the huge number of people who must suryiye on the limited supplies in the cave could nol remain there for long. Also, Chilcott knew that to notify the authorities of his temaining crew on the islet, he must quickly convey the news to a port from which ships sailed to Sydney. Chilcott and his group were exhausted after eleven days in the boats. With a volunteer crew and several of his passengers, Captain Robertson immediately set out for Port Essington in their long boat. In the meantime, the twenty-four Lascars lefl on Chilcott Islet had reached 2 decision. The con- struction of araft from materials salvaged fron the wreck had begun before Chilcott and the others had departed in the boats. Having little faith in the boats’ chances of success, twenty-one of Theos decided to attempt to teach the mainland. They set out twe days behind Chilcott, on the 23rd of May. leaving three less venturous men on the Isler. Two days after Robertson's long boat left Booby Island, on 2nd June, the schooner Shani- rock, Captain G. Browning, called in and took on board Chilcott and the fifty remaining survivors of the two wrecks, Their first port of call was Port Essington where, on the 7th June, they found Robertson had safely arriyed, Chilcott had left letters at Booby Island for Captain Blackwood of HMS Fly advising of the wrecks, the survivors’ progress to Port Essington, and of the situation of the Lascars left at Chilcott Islet. The Fly with her small tenders Prince George and Midge had been conducting surveys off the south coast cf New Guinea and had become separated from the Midge and the ship’s second gig. Captain Blackwood dispatched the Prince George lo Booby Island for intelligence, as that was their emergency rendezvous, and on 2 June the Fly weighed anchor and followed. J. Beete Jukes. Naturalist on Fiy recorded, ‘On nearing Booby Island [on the Sth of June), we saw the appointed signa) for good news flying, and found that our boats, having missed us on the coast of New Guinea, after a vain attempt to reach Caedha, or Bramble Key, had run for this little islet We had left provisions here in the early part of the year forany ship- wrecked people that might come in their boats [the N.S,W. Government maintained supplies in the “Post Office cave"). Availing themselves of these, and procuring a MEMOIRS OF THE QUEENSLAND MUSEUM 36 “sIoSurp Jo Ivapo Jeadde prnom (paulysapun) sjea[s] essary, ay) JO IsaMyIOU pure yVIOU A]a\PIPSUIUT BoTe OY], “NOoTTYD ureydes Aq pasn iy} oO} eps ATqeqoid pue ‘uopuo’T ‘ployueis prempg Aq paystqnd Qpgt‘o yey B Jo uONIOg “p ‘OTT keupay Wt synaue) coz 2291 20 ot BST yung o7v7 i zat ores Pope AAU. mn ‘aaa, por yeep a 7 FEET tC Hey You “ys. Sp Hef we PUaRysimMa4y y 7009 4 peer rer = Ae t+ pH ees . SUPS Ls, ‘ . Ans; . sopsy 5 yy T 'W8 comune. ey wii +f Clay: US YPo pt ‘ US Ung 7 ys 20047 “