A Stereo -Atlas of Ostracod Shells edited by R. H. Bate, J. W. Neale, Lesley M. Sheppard and David J. Siveter Editors Dr R.H. Bate, Department of Palaeontology, British Museum (Natural History), Cromwell Road, London SW7 5BD. Prof. J.W. Neale, Department of Geology, The University, Hull HU6 7RH. Dr Lesley M. Sheppard, SSI (U.K.) Limited, Tannery Hse., Tannery Lane, Send, Woking, Surrey. Dr David J. Siveter, Department of Geology, The University, Leicester LEI 7RH. Editorial Board Dr G. Bonaduce, Stazione Zoologica, 80121 Napoli, Italy. Dr J.-P. Colin, Esso Production Research - European, 213 Cours Victor Hugo, 33321 Begles, France. Dr P. De Deckker, Research School of Pacific Studies, Australian National University, PO Box 4, Canberra ACT 2600, Australia. Dr D. van Harten, Universiteit van Amsterdam, Geologisch Instituut, Nieuwe Prinsengracht 130, Amsterdam, The Netherlands. Dr I. Purper, Departamento de Paleontologia e Estratigrafia, UFRGS, 90 000 Porto Alegre RS, Brazil. Dr R.E.L. Schallreuter, Universitat Hamburg, Geologisch-Palaontologisches Institut, Bundesstrasse 55, D 2000 Hamburg 13, West Germany. Officers of the British Micropalaeontological Society Chairman Dr R. H. Bate, Department of Palaeontology, British Museum (Natural History), London SW7 5BD. Secretary Dr A.R. Lord, Department of Geology, University College London, Gower Street, London WC1. Assistant Secretary Dr P.P.E. Weaver, Institute of Oceanographic Sciences, Wormley, Godaiming, Surrey, GU8 5UB. Treasurer Dr J.E. Whittaker, Department of Palaeontology, British Museum (Natural History), Cromwell Road, London SW7 5BD. Editor Dr. L.M. Sheppard, SSI (U.K.) Limited, Tannery Hse., Tannery Lane, Send, Woking, Surrey. Circular Editor Dr E.G. Spinner, Department of Geology, The University, Mappin Street, Sheffield SI. Conodont Group: Chairman Dr R.L. Austin, Department of Geology, The University, Southampton. Secretary Dr A.C. Higgins, Department of Geology, The University, Sheffield SI. Foraminifera Group: Chairman Prof. M.B. Hart, Department of Geology, Plymouth Polytechnic, Drake Circus, Plymouth PL4 8AA. Secretary Dr M.D. Fewtrell, Erico Research Laboratories Ltd., Lane House, 233-235 Roehampton Lane, London SW15 4LB. Microplankton Group: Chairman Dr J.P.G. Fenton, Robertson Research International Ltd., Ty’n-y-Coed, Llanrhos, Llandudno, Gwynnedd LL30 ISA. Secretary Dr S. Molyneux, Institute of Geological Sciences, Ring Road, Halton, Leeds. Ostracod Group: Chairman Dr R.C. Whatley, Department of Geology, University College of Wales, Aberystwyth, Dyfed SY23 3DB. Secretary Dr. D.J. Horne, Department of Geology, City of London Polytechnic, Walburgh House, Bigland Street, London E.l. Palynology Group: Chairman Mr M.J. Fisher, British National Oil Corporation, 150 St. Vincent Street, Glasgow G2 5LJ. Secretary Dr D.J. Smith, BP Research Centre, Chertsey Road, Sunbury-on-Thames, Middlesex. Instructions to Authors Contributions illustrated by scanning electron micrographs of Ostracoda in stereo-pairs are invited. Format should follow the style set by the majority of papers in this issue. Descriptive matter apart from illustrations should be cut to a minimum; preferably each plate should be accompanied by one page of text only. Blanks to aid in mounting figures for plates may be obtained from any one of the Editors or Editorial Board. Completed papers should be sent to Dr David J. Siveter. The front cover shows a male right valve and soft parts, internal view, of Caboncypris nunkeri De Deckker, 1982 Printed by United Printing Services, Blackpool, England. I 1 .4-4 I I I -11J. Stereo-Atlas of Ostracod Shells 10 (1) 1-4 (1983) 595.336.13 (113.312) (429 : 162.005.51) : 551.35 + 552.55 T allinnellina dissita (1 of 4) ON TALLINNELL1NA DISSITA SCHALLREUTER & SIVETER sp. nov. by R. E. L. Schallreuter and David J. Siveter (University of Hamburg, West Germany and University of Leicester, England) Tallinnellina dissita sp. nov Holotype: Type locality: Derivation of name: Figured specimens: Brit. Mus. (Nat. Hist.) no. OS 6698, 9 RV. [Paratypes: Brit. Mus. (Nat. Hist.) nos. OS 6699, 6670, 6692, 6693, 6852. Geologisch- Palaontologisches Institut, University of Hamburg, nos. 2344, 2325]. Old quarry about 300 m south of Cum Agol Farm, near Llandeilo, Dyfed, Wales; approx, lat. 51° 51 ' N, long. 4° 05' W (Nat. Grid Ref.: SN 56552070). Llandeilo ‘Flags’, Llandeilo Series, middle Ordovician. Latin dissitus, distant, alluding to its geographical and stratigraphical position in comparison with congeneric species. Brit. Mus. (Nat. Hist.) nos. OS 6698 (holotype, 9 RV : PI. 10, 2, figs. 1-4), OS 6699 (c 1 LV : PI. 10, 2, fig. 5), OS 6692 (c/RV: PI. 10, 4, figs. 1, 2, 4), OS 6700(tecnomorphic RV: PI. 10, 4, fig. 3), OS 6693 (9 RV: PI. 10, 4, fig. 5). All the figured specimens are from the type locality and horizon. Explanation of Plate 10, 2 Figs. 1-4, 9 RV (holotype, OS 6698, 1400 p.m long): fig. 1, ext. ant.; fig. 2, ext. lat.; fig. 3, ext. vent, obi.; fig. 4, ext. vent. Fig. 5,cfLV, ext. lat. (OS 6699, 1400 /xm long). Scale A (250/um; x 40), figs. 1-4; scale B (250/xm; x 40), fig. 5. -t-r-i +++ 444 + E4 Stereo- Atlas of Ostracod Shells 10, 3 Tallinnellina dissita (3 of 4) Diagnosis: Species of Tallinnellina with lobes virtually straight and perpendicular to the dorsal border; LI, L3 and L4 reach dorsal border, where they are more or less weakly expanded; L4 broader than L3. L1-L3 and sometimes posteroventral margin of L4 show tendancy to become cristate; L1-L2 cristae form V-shape. Connecting lobe bow-shaped, slightly depressed below S2. Velar flange terminates mid- posterally, dimorphic: anteriorly and centroventrally wider and more distant from the free margin in the female, forming a simple antrum. Remarks: The new species shows closest morphological similarity and phylogenetic affinity to Tallinnellina rara Sarv (Eesti NSV Tead. Akad. Geol. Inst, uurimused 4, 1959) from the upper Lower Ordovician (middle Kunda Stage, B 3/J) of Estonia. In general, in both species the lobes are more vertical than in congeneric taxa. Compared to T. dissita, in T. rara LI and L2 are weakly curved and weakly oblique to the dorsal border, its lobes lack cristae, and the connecting lobe is straighter, more parallel to the dorsal border and forms a rounded right angle with L4. Furthermore, in T. dissita the connecting lobe is depressed below S2 and the velar flange does not extend to the dorsal border but ends abruptly mid-posterally. The abrupt mid-posterior termination of the velar flange is characteristic of Tallinnella Opik, 1937 as defined by Jaanusson (Bull. geol. Instn. Univ. Uppsala, 37, 344, 1957). The difference between Tallinnella and Tallinnellina Jaanusson, 1957 is, however, unclear and requires first-hand investigation of the respective type-species. T. dissita is the youngest known species of the genus and its first representative from the middle Ordovician and from outside Baltoscandia. In addition to species illustrated by Siveter (The Ordovician, In: Bate, R. H. & Robinson (Eds.), A Stratigraphical Index of British Ostracoda, Geol. Jl., 8, 41-56), T. dissita is another link between British and Baltoscandian ostracod faunas in the middle Ordovician. Adult valves are 1.25 - 1.52 mm long. Distribution: So far known only from the area of the type locality, Wales. Explanation of Plate 10, 4 Figs. 1, 2,tfRV (OS 6692; 1450/xm long): fig. 1, ext. ant.; fig. 2, ext. lat.; fig. 3, tecnomorphic RV, ext. lat. (OS 6700; 1 175/xm long); fig. 4,d'RV, ext. vent. (OS 6692); fig. 5,9RV, ext. lat. (OS 6693; 1375 /xm long). Scale A (250/xm; x 38), figs. 1, 2, 4; scale B (200 /xm; x40), fig. 3; scale C (250/xm; x 40), fig. 5. 4L. I I J-i- t- + T- Stereo- Atlas of Ostracod Shells 10, 2 Tallinnellina dissita (2 of 4) i-rt-- i-t-t-- LLL. Stereo- Atlas of Ostracod Shells 10, 4 -14 Tallinnellina dissita (4 ot 4) r i- r H tr- M tT — | II Mi -4 — L- I I I 41J T-l-f Stereo-Atlas of Ostracod Shells 10 (2) 5-12 (1983) 595.336.13 (113.312) (420 : 162.003.52) : 551.351 + 552.52 Harperopsis scripta (1 of 8) ON HARPEROPSIS SCRIPTA (HARPER) by C. R. Jones & David J. Siveter (University of Leicester, England) Genus HARPEROPSIS Pribyl, 1966 Type-species (by original designation): Tetradella scripta Harper, 1947 Diagnosis: Large, amplete, quadrilobate tetradellid; having short anteroventral connecting ridge (relict histium) between connecting lobe and velum. L2 short, connects near base of LI; LI, L3, L4 strongly developed, ridge like, nearly vertical, projecting above dorsum; L3 with dorsal bifurcation, giving smaller cusp nearer dorsum. Velum as well developed (-inflated) ridge, terminates abruptly mid- posteriorly. Infravelar, anterior-anteroventral antrum; dolon smooth, extends to anterior cardinal corner. Row of spines forming marginal sculpture. Remarks: Harperopsis differs from other genera by its unique connecting ridge between its velum and the connecting lobe. Its prominent, vertical lobes (LI, L3 L4) are also distinctive. The overall mor- phology of the type-species Harperopsis scripta is reminiscent of the ctenonotellid Tallinnella dimorpha Opik ( Publ . Geol. Inst. Univ. Tartu, 50, 1937), type-species of the older Tallinnella Opik, 1937. Both H. scripta and T. dimorpha have a thick velar ridge terminating mid-posteriorly, and anteroventral antra in hetoromorphs. T. dimorpha differs by the bulbous dorsal terminations of L 1, L3, L4, the swollen, granulose base of L 1 , and by the absence of any histial structure comparable to Explanation of Plate 10, 6 Figs. 1-6,9LV (unnumbered specimen, on same slab as holotype, 2820 p.m long): fig. 1, ext. lat. ; fig. 2, ext. ant. ; fig. 3, obi. vent. ; fig. 4, vent.; fig. 5, obi. dors.; fig. 6, dors. Scale A (500 pm; x20), figs. 1-6. -t-r — i -M-H 44 4 n- Stereo- Atlas of Ostracod Shells 10, 7 Harperopsis scripta (3 of 8) Remarks (cont.): the ventral connecting ridge oiH. scripta. Such a structure (interpreted as a ventral strengthening strut) could have developed by an accretionary process, involving the velum and connecting lobe; in this case a Tallinnella- like ancestor could thus be postulated. However, we beli Harperopsis is derived from older tetradellid stock (found in the Llandeilo Series of South Wales and basal Caradoc Series of the Shelve district, Shropshire), which has a histial ridge connected anteroventrally to the velum. Thus, more likely, a reduction of this condition would give rise to the ventral connecting ridge (a relict histial structure) of Harperopsis. Pribyl ( Cas . narod. Mus., 135 (4), 201-2, 1966) designated T. scripta type-species of his new subgenus Cerninella (Harperopsis) . However, Pfibyl’s generic diagnosis excludes//, scripta as now known. Beyrichia bohemica Barrande (Systeme Silurien due centre de la Boheme , 1, suppl., pi. 26, fig. 13, pi. 34, figs. 19, 20, 1872), type-species of Cerninella , differs from H. scripta by the lack of a histial structure, its slender LI, L2, L3, and its dorsally reduced L4. Following Siveter (Geol. J. Spec. Issue, 8, 52, 1978), we regard Harperopsis as a distinct genus. We differ with Pribyl’s (204, 1966) generic assignment of T. bicuneformis Harper (op. cit. 348-49, pi. 10, figs. 4, 10, text-fig. lb) to within C. (Harperopsis) . This species differs from Harperopsis in having a more well defined relict histial ridge, more inclined L3 and L4, and an isolated V-shaped L1-L2. Although T. bicuneformis is closely related to Harperopsis (cf. Siveter, 50, 1978), we consider that the species is best assigned to a new tetradellid genus (C. Jones, in prep). Additional forms referred to Harperopsis include Beyrichia decorata Jones (Ann. Mag. nat. Hist. (2), 16, 165, pi. 6, fig. 6, 1855) and an additional, undescribed British species. Distribution: Harperopsis is known from the Caradoc Series, middle Ordovician, of Wales and Northern England. Explanation of Plate 10, 8 Figs. 1-6, dLV (holotype, GSM 74875A, 2800 ^m long): fig. 1, ext. lat.; fig. 2, ext. ant.; fig. 3, obi. vent.; fig. 4, vent.; fig. 5, obi. dors.; fig. 6, dors. Scale A (500 /xm; x 20), figs. 1-6. -M— t 4L. i l I Stereo- Atlas of Ostracod Shells 10, 6 Harperopsis scrip ta (2 ot 8) L. j_ L 44 H -■ I— H-- Stereo- Atlas of Ostracod Shells 10, 8 Harperopsis scripta (4 of 8) HI nr- 'i r I I I IlJ I 4 I L Stereo- Atlas of Ostracod Shells 10, 9 Harperopsis scripta (Harper, 1947) r-t-t Harperopsis scripta (5 of 8) 1855 Beyrichia complicata, Salter; T. R. Jones, op. cit., 164 (pars), pi. 6, fig. 5 ( = juvenile on GSM 49449). 1947 Tetradella scripta sp. nov.; J. C. Harper, Geol. Mag., 84, 347, 348 (pars), pi. 10, figs. 1, 2, 8, text-fig. la. 1948 Tetradella scripta Harper; I. Strachan, J. Temple & A. Williams, Geol. Mag., 85, 276, 277. 1953 Tallinnella scripta (Harper, 1947); G. Henningsmoen, Norsk, geol. Tidsskr., 31, 214. 1964 Tallinnella scripta (Harper); Brit. Mus. Nat. Hist., British Palaeozoic Fossils, pi. 12, fig. 11, London. 1966 Cerninella (Harperopsis) scripta. Harper, 1947; A. Pribyl, op. cit., 201, 202. 1978 Harperopsis scripta (Harper, 1947); D. J. Siveter, op. cit., 52, pi. 3, figs. 7, 8. Holotype: Institute of Geological Sciences Museum, London, no GSM 74875A; cfLV, external mould. Type locality: 150 m E of Cwms Cottage, 0.5 km SE of Caer Caradoc Hill, Church Stretton, Shropshire (Grid Ref. SO 4816 9493); approx, lat. 52° 32' N, long. 2° 46' W. Harnage Shales, Harnagian, Caradoc Series, middle Ordovician. Figured specimens: Institute of Geological Sciences, nos. GSM 74875A (holotype, d'LV: PI. 10, 8, figs. 1-6; PI. 10, 12, figs. 1-4); unnumbered specimen on same slab as holotype (9LV; PI. 10, 6, figs. 1-6; PI. 10, 10, figs. 1-3). Both from the type locality and horizon. The figured specimens (Siveter,1978, pi. 3, figs. 7, 8) are ‘Silcoset’ silicone rubber casts of external moulds. Explanation of Plate 10, 10 Figs. 1-3, ?LV (unnumbered specimen, on same slab as holotype): ornament (granules with pores) at base of S3. Scale A (250 pm ; x 64), fig. 1 ; scale B (125 pun; x 120), fig. 2; scale C (25 punt x 424), fig. 3. i i i i r| ri -t-r-i -M--H -\ XU 44 4 - -H-4 — Stereo-Atlas of Ostracod Shells 10, 11 Harperopsis scripta (7 of 8) Diagnosis: Remarks: Distribution: Large Harperopsis having diminutive L2. Dolon, velar ridge, lobal crests and all but ventral-most parts of sulci smooth; granulose elsewhere. Left valve with almost entire inner semi-groove; complementary marginal flange on right valve. Harper (347, 348, 1947) placed H. scripta in Tetradella on the basis of its lobation, but did not recognise its dimorphism. None of the six species he assigned to Tetradella would now belong within the genus. Intraspecific variation in H. scripta consists of flattened to semi-cristate L2, and ridge-like to swollen base of L4. Juveniles have fimbriate L3, and more cristate-like lobation. H. decorata differs from H. scripta by its inflated velum, reduced lobation but with LI, L3, L4 bulbous dorsally, and the obsoletion of lobal bifurcation to L3. The Harnage Shales, Harnagian, Caradoc Series, Shropshire, England. Dean (Bull. Brit. Mus. Nat. Hist. (Geol.), 3 (6), 218-220, 1958) also records//, scripta from the Costonian, Harnagian and Soudleyan of the Caradoc Series of Shropshire, but those occurrences have not yet been confirmed. H. scripta is one of the most commonly quoted ostracodes in British Ordovician faunal lists, but undoubtedly most of these records should be treated with caution as most probably they refer to other forms of quadrilobate palaeocopes. Explanation of Plate 10, 12 Figs. l-4,dLV (holotype, GSM 74875 A): ornament (granules with pores) at base of S2 (figs. 1, 2) and ventral supra-velar region (figs. 3,4). Scale A (250 pun ; x 64), fig. 1 ; scale B (50 pun ; x 200), fig. 2 ; scale C (250 pun ; x 64), fig. 3 ; scale D (32 pun ; x 3 10), fig. 4. tt TP —I— I -|-t XU I I 1 I I I Lll. I 1 l"T~ Stereo- Atlas of Ostracod Shells 10, 10 Harperopsis scripta (6 of 8) hth- M- ' — J_ 1 — I +- + + Stereo-Atlas of Ostracod Shells 10, 12 1 Harperopsis scripta (8 of 8) H| IT H! IT I j : i-L i i- r r T ■I— I I 4 4 I I I T + + Stereo-Atlas of Ostracod Shells 10 (3) 13-16 (1983) Vittella fecunda (1 of 4) 595.336.13 (113.312) (429 : 162.005.51) : 551.35 + 552.55 ON VITTELLA FECUNDA SIVETER sp. nov. by David J. Siveter ( University of Leicester, England) Vittella fecunda sp. nov. 1963 Lomatobolbina sp.; N. Spjeldnaes, Palaeontology , 6, 258, pi. 36, fig. 8. 1978 Lomatobolbina sp. nov. 1; D. J. Siveter, The Ordovician, In: Bate, R. H. & Robinson, E. (Eds.), A Stratigraphical Index of British Ostracoda, Geol. JL, special issue 8, 48, pi. 1, figs. 11, 12. Holotype: Type locality: Derivation of name: Figured specimens: Brit. Mus. (Nat. Hist.) no. OS 7777,9 LV. Old quarry about 300m south of Cwm Agol Farm, near Llandeilo, Dyfed, Wales; approx, lat. 51° 51' N, long. 4° 05' W (Nat. Grid Ref. SN 56552070). Llandeilo ‘Flags’, Llandeilo Series, middle Ordovician. Latin fecundus, fertile; alluding to the well developed dolon (‘brood pouch’) in the females. Brit. Mus. (Nat. Hist.) nos. OS 7777 (holotype,? LV: PI. 10, 14, fig. 1), OS 7778(tfRV: PI. 10, 14, figs. 2, 3; PI. 10, 16, fig. 5), OS 7779 (9LV: PI. 10, 14, fig. 4), OS 7782 (tecnomorph RV: PI. 10, 16, figs. 1-3), OS 6672 (9 LV: PI. 10, 16, fig. 4), OS 7781 (PI. 10, 16, fig. 6). All the figured specimens are from the type locality and horizon. All material occurs as silicified valves. Explanation of Plate 10, 14 Fig. 1,9LV, ext. lat. (holotype, OS 7777, 1450/um long); fig. 2,cfRV, ext. lat. (OS 7778, 1350/am long); fig. 3,d'RV, ext. post. (OS7778); fig. 4,9LV, ext. lat. (OS 7779, 1330/u.m long). Scale A (250/zm; x 38), fig. 1; scale B (250/xm; x40), figs. 2-4. rr rr ++-1-- • + + -i — 444 7_l~ + + + Stereo- Atlas of Ostracod Shells 10, 15 Vittella fecunda (3 of 4) Diagnosis: Species of Vittella with supra-velar furrow well developed throughout, and a weak perimarginal ridge occurring (at least in females) between dolonal edge and valve margin along most of the antrum. S2 narrow, sigmoidal, narrowing and weaker ventrally; above, a faint elevation near dorsum. L2 node like; L3 broad with variously developed ventral node (-spine). Velum frill-like, widest anteriorly and ventrally, gradually reduced to posterior mid-height; extended into wide, convex anterior-ventral dolon. Remarks: Siveter (op. cit.) temporarily assigned this species to Lomatobolbina Jaanusson, 1957. The faint antral ridge is here confirmed (in many though not all females) and re-interpreted as a weak peri- marginal ridge and the main adventral structure is reinterpreted as a velum, not a histium. Vittella is a glossomorphitine, tetradellids in which the histium can be obsolete. V. fecunda differs from the middle Ordovician Baltoscandian type-species, V. vittensis Schallreuter ( Ber . geol. Ges. DDR, 2, 1964), and from the Siberian V. rogeri (Ivanova & Melnikova) ( Palaont . z, 11, 1977) by having a perimarginal ridge and by its wider dolon in lateral view. The middle Ordovician V. rogeri (op. cit., 87, text-fig. 2) appears to be closely similar to V. fecunda but differs further by its apparently thicker adventral structure and in having its S2 slightly wider ventrally. Even amongst material etched from a single block of limestone V. fecunda displays wide infraspecific variation, particularly in the size of adults (99: c. 1050-1450/xm) and in the development of the L3 node, which in extreme cases is either spine-like or absent. Vittella is one of the many ostracode genera (e.g .Homeokiesowia, Tallinnellina, Cryptophyllus) now known to be common to both southern Britain and the Baltic area in the middle Ordovician (e.g. see Siveter, 1978; Stereo-Atlas of Ostracod Shells, 9, 89, 1983; Schallreuter & Siveter Ibid., 9, 85, 1983). Distribution: Known only from the area of the type locality. South Wales. Explanation of Plate 10, 16 Figs. 1-3 tecnomorphis RV (OS 7782, 875/xm long); fig. 1, ext. lat.; fig. 2, obi. vent.; fig. 3, ext. ant.; fig. 4,9 LV, ext. lat. (OS 6672, 1270/xm long); fig. 5,cfRV, ext. vent. (OS 7778); fig. 6,?RV, int. vent. obi. (OS 7781, 1280/u.m long). Scale A (250/u.m; x 50), figs. 1-3; scale B (250/um; x 40), figs. 4, 6; scale C (250/um; x 40), fig. 5. t r rr XL Stereo-Atlas of Ostracod Shells 10, 14 i-ri- h + t- Vittella fecunda (2 of 4) i 4- T L. J_L -14 h- +~l~ Stereo-Atlas of Ostracod Shells 10, 16 Vittella fecunda (4 of 4) IT “IT I I I 11J_. J-U Stereo-Atlas of Ostracod Shells 10, (4) 17-20 (1983) 595.337.14 (116.331) (44 : 162.001.44 + 469 : 162.009.38) : 551.351 Sarlatina merlensis (1 of 4) ON SARLATINA MERLENSIS BABINOT & COLIN by J. P. Colin (Esso Production Research-European Lab., Begles, France) Genus SARLATINA Babinot & Colin, 1976 Type-species (by original designation): Sarlatina merlensis Babinot & Colin, 1976 Diagnosis: Remarks: Carapace ovoid, more or less elongate, smooth with rather numerous sieve-pores. Weak, subvertical post-ocular sulcus present. Left valve larger than right; hinge antimerodont. Small anterior vestibulum present. Strong sexual dimorphism, with males more elongate and females slightly swollen posteriorly. About 60 marginal pore canals., straight or sinuous. The monotypic genus Sarlatina is thought to be a descendant of the Jurassic to Early Cretaceous genus Fabanella Martin and the ancestor of the Cenozoic to Recent genus Cyprideis Jones. Its occurrence generally in mono- to oligospecific associations suggests its preference for brackish environments. Explanation of Plate 10. 18 Fig. l,9car., ext. rt. lat. (8215-16, 920^un long); fig. 2,9LV, ext. lat. (8217-18, 940/um long); fig. J.d'LV, int. lat. (8221-22. 930yum long). Scale A (250/u.m: x 58), figs. 1-3. + + + +-t — -U.-I -M- + + + — Stereo- Atlas of Ostracod Shells 10, 19 Sarlatina merlensis (3 of 4) Sarlatina merlensis Babinot & Colin, 1976 1963 1976 Fabanella ? sp. H. J. Oertli, Mesozoic Ostracod Faunas of France, Edit. E. J. Brill, pi. 78, 2e; pi. 89, 1-2, Leiden. Sarlatina merlensis n. sp.; J. F. Babinot & J. P. Colin, Abh. Verb, naturwiss, Ver. Hamburg (NF), 18/19 (Suppl.), 164-168, pi. 2, figs. 8-17, pi. 3, figs. 1-12. Holotype: Unnumbered specimen, deposited in the collections of the Laboratoire de Micropaleontologie, Universite Pierre et Marie Curie, Paris; d'carapace. Type-locality: Borehole of Merle, village of Berbiguieres, near St. Cyprien, Dordogne, SW France; approx, lat. 44° 50' N, long 1° 03' W. Cenomanian, Cretaceous. Figured specimens: EPR-E 8215-16 (9car.: PI. 10, 18, fig. 1), 8217-18 (9LV: PI. 10, 18, fig. 2), 8221-22 (c^LV: PI. 10, 18, fig. 3), 8227-28 (d'car.: PI. 10, 20, fig. 1), 8225-26(cf RV: PI. 10, 20, fig. 2). 8260(tfcar.: PI. 10, 20, fig. 3). i. All the specimens are from the Middle Cenomanian marginal- marine sediments of Cacem, NW of Lisbon, Portugal, approx, lat. 38° 47' N, long. 9° 13' W; coll, by Dr P. Y. Berthou (Mem. Serv. geol. Portugal , no. 23, 1973). Diagnosis: As for the genus. Distribution: Cenomanian of SW France, Spain, Portugal and North Africa. Explanation of Plate 10, 20 Fig. 1, d'car., ext. rt. lat. (8227-28, 1122 /zm long); fig. 2, cfRV, int. lat. (8225-26, 940 /im long); fig. 3, d'car., ext. dors. (8620, 957 ^im long). Scale A (250yu.ni; x 49), fig. 1 ; scale B (250yu,m; x 58), figs. 2, 3. i i -1-1- l i — I — LI — I ' I Lll. I ! I I I Stereo- Atlas of Ostracod Shells 10, 18 Sarlatina merlensis (2 of 4) t-ri- LLL -14 H +- + - Stereo-Atlas of Ostracod Shells 10, 20 Sarlatina merlensis (4 of 4) 4 1 — 1_ 4T_r I I I I I I 1 1 I 4 -I — | — I I I -4-U r-t-i Stereo-Atlas of Ostracod Shells 10 (5) 21-24 (1983) 595.336.12 (113.313) (430.1 : 161.006.52 + 492.71 161.008.54) : 551.35 + 552.55 Reginea reginae (1 of 4) ON REGINEA REGINAE SCHALLREUTER gen. et sp. nov. by Roger E. L. Schallreuter (University of Hamburg, German Federal Republic) Derivation of name: Diagnosis: Remarks: Genus REGINEA gen. nov. Type-species: Reginea reginae sp. nov. In honour of Regine Heidenreich, Planegg near Munich, German Federal Republic. Very small (less than 0.5 mm) binodicope, more or less amplete, with three nodes. One node in front of S 2 at the dorsal border, one node in the anteroventral region and one node in the center of the postadductorial area. Border between lateral and marginal surface forms a ridge- like pseudo- velum reducing in width in dorsal direction anteriorly and posteriorly. Lateral surface, including nodes, coarsely reticulate. Reginea is very similar to Klimphores Schallreuter, 1 966 ( Stereo-Atlas of Ostracod Shells, 7 (1), 1980) and related genera, especially Laterophores Schallreuter, 1968 (Ber. deutsch. Ges. geol. Wiss. A 13, 2), Vaivanovia Schallreuter, 1966 (Ibid. 11, 3), Bullae ferum Qvale, 1980 (Norsk geol. Tidsskr., 60, 2) and Warthinia Spivey, 1939 (J. Paleont., 13, 2). The new genus is distinguished particularly by the central position of its posterior node.) Explanation of Plate 10, 22 Fig. 1, RV, ext. lat. (holotype, GPIMH 2712, 373 /am long); fig. 2, LV, ext. lat. (paratype, GPIMH 2713, 366 /am long). Scale A (100 /am; x 260), figs. 1, 2. ■fi _r| -t-t-i -t-t-H J4J— -M- E-f Stereo -Atlas of Ostracod Shells 10, 23 Reginea reginae (3 of 4) Reginea reginae sp. nov. Holotype: Type locality: Derivation of name: Figured specimens: Diagnosis: Distribution: Geologisch-Palaontologisches Institut und Museum, University of Hamburg, no. 2712, RV. [Paratypes: nos. 2713-2715]. Upper Harjuan (Upper Ordovician) Ojlemyrflint erratic boulder no. SylOO of the Upper Kaolinsand (Lower Pleistocene) near Braderup, Isle of Sylt (N Frisian Is., N Sea), Germany; lat. 54° 56' N, long. 8° 21' E. As for the genus. Geologisch-Palaontologisches Institut und Museum, University of Hamburg (GPIMH) nos. 2712 (holotype RV: PI. 10, 22, fig. 1), 2713 (LV: PI. 10, 22, fig. 2), 2716 (juv. RV: PI. 10, 24, fig. 1) and 2714 (juv. LV: PI. 10, 24, fig. 2). Nos. 2712-2714 are from the type locality; boulder coll, by Ulrich von Hacht, Hamburg, in 1980. No. 2716 is from the Ojlemyrflint erratic boulder no. Wie 1 from Wielen near Uelsen, West Germany; lat. 52° 32.5' N, long. 6° 44' E; coll, by F. Rhebergen, Schoonebeek, Netherlands, in 1982. As for the genus. Known from Upper Harjuan (Upper Ordovician) Ojlemyrflint erratic boulders of Schleswig- Holstein (Isle of Sylt) and Niedersachsen (Wielen). Explanation of Plate 10, 24 Fig. 1, juv. RV, ext. lat. (GPIMH 2716, 250 /urn long); fig. 2, juv. LV, ext. lat. (paratype, GPIMH 2714, 268 gm long). Scale A (50 /urn ; x 380), fig. 1 ; scale B (50 /urn ; x 330), fig. 2. ‘TP "TP ,1L. I I - 1 — J— t — •t — I- -f — Stereo -Atlas of Ostracod Shells 10, 24 n- i i i i i i 14 I I I I I I f I rr Reginea reginae (4 of 4) i l H- i -r r IT -IT J- r r i I— 4-L -T-l- i 1 i iU "I I t Stereo-Atlas of Ostracod Shells 10 (6) 25-28 (1983) Bromidella sarvi (1 of 4) 595.336.13 (113.312) (489:161.012.54) : 551.35 + 552.55 ON BROMIDELLA SARVI SCHALLREUTER by Roger E. L. Schallreuter (University of Hamburg, German Federal Republic) Bromidella sarvi Schallreuter, 1964 1964 Bromidella sarvi sp. n. R. E. L. Schallreuter, Ber. geol. Ges. DDR, 9, (3), 389, 390, 430, pi. 13 (431), fig. 2. 1973 Bromidella sarvi Schallreuter; R. E. L. Schallreuter, Palaeontographica, (A), 144 (1/3), 79,86-88, text-fig. 18, pi. 20, figs. 1-6, tab. 10. (q.v. for further synonymy). Holotype: Department of Geological Sciences, University of Greifswald, Greifswald, G.D.R., no. 4/2 (= no. OS 163), 9 RV. Type locality: Beach at Dornbusch, Isle of Hiddensee (Baltic Sea); lat. 54° 36' N, long. 13° 7' E. Backsteinkalk erratic boulder (IB 2 Type, no 1B2), middle Ordovician (equivalent of the upper Dalby Formation of Central Sweden). Explanation of Plate 10, 26 Fig. 1,9 RV, ext. lat. (GPIMH 2708, 2.12mm long excluding spines); fig. 2,$ RV, int. lat. (GPIMH 2709, 2.12mm long excluding spines). Scale A (250 gm; x 42), figs. 1, 2. t-r-i M-H _i_L —I T + + 4 Stereo-Atlas of Ostracod Shells 10, 27 Bromidella sarvi (3 of 4) Figured specimens: Diagnosis: Remarks: Distribution: Geologisch-Palaontologisches Institut und Museum (GPIMH) nos. 2708 ( 9 RV : PI. 10, 26, fig. 1), 2709(9 RV: PI. 10, 26, fig. 2). 2710(latejuv.LV: PI. 10, 28, fig. 1) and 2711 (young juv. LV: PI. 10, 28, fig. 2). All from the Backsteinkalk (1B14 Type) erratic boulder no. Mpn 2 from the beach at Liselund, Isle of Mpn (Baltic Sea), Denmark; lat. 55° 0.5' N, long. 12° 32' E; coll, by the author in 1978. Species of Bromidella with distinct laterovelar furrow. Tecnomorphs with a flange: ventrally and posteriorly this is more or less (depending on the instar stage) dissolved into spines. Dolon from anterocentral to centroventral region. Lateral surface of domicilium and of dolon more or less spinose; spines short and blunt and of irregular shape. Females 2.12-2.40 mm long. Bromidella sarvi is very similar to species placed in Uhakiella Opik, 1937 but in typical Uhakiella species the males possess special features not present in the juvenile tecnomorphs ( = larvae) (cf. R. E. L. Schallreuter , Palaeontographica, (A), 144, pi. 19, figs. 1, 8, 1973). The females of Bromidella reticulata Harris, 1931 (type-species) are distinguished mainly by the lack of a laterovelar furrow and by the ornament on the dolon (short anteroventral ridge, ventral row of spines becoming larger in posterior direction), features considered significant at specific level. The morphology of the males of B. reticulata is unknown. By comparison with related genera (for example Hithis Schallreuter, 1964), it is presumed that the tecnomorphic velum consists of a row of spines or a flange and spines, similar to that in B. sarvi. Known only from Backsteinkalk erratic boulders (Types IB 2, IB 7), lower Upper Viruan, middle Ordovician; northern Germany, Denmark. Explanation of Plate 10, 28 Fig. 1, late juv. LV, ext. lat. (GPIMH 2710, 1.835 mm long excluding spines); fig. 2, young juv. LV (GPIMH 2711, 1.025 mm long excluding spines). Scale A (250/Ltm; x 51), fig. 1; scale B (100 p.m; X 86), fig. 2. I Stereo-Atlas of Ostracod Shells 10, 26 1-1-1- M- i -r Bromidella sarvi (4 ol 4) n — r ITT Bromidella sarvi (2 of 4) Stereo-Atlas of Ostracod Shells 10, 28 +-++ 4 — L llJ -T-l- r+-t Stereo-Atlas of Ostracod Shells 10 (7) 29-38 (1983) Nannocythere pavo (1 of 10) 595.337.14 (119.9) (261.27 : 162.006.54 + 162.005.55 + 161.007.54 + 261.268) : 551.351 ON NANNOCYTHERE PAVO (MALCOMSON) by John Athersuch & David J. Horne (B.P. Research Centre, Sunbury-on-Thames & City of London Polytechnic) Genus NANNOCYTHERE Schafer, 1953 1953 Nannocythere gen. nov. Schafer , Hydrobiologia 5, 352. Type-species: Nannocythere remanei Schafer, 1953 { = Bythocythere pavo Malcomson, 1886) Diagnosis: Adult carapace small (< 350 pm long), elongate; anterior margin rounded with broad, compressed flange; strongly inflated. Eye spot absent. Surface strongly and evenly pitted, bearing numerous ] pore conuli which are most prominent posteriorly and anteriorly. Hinge gongylodont with smooth median element; posterior tooth of right valve bilobate but not split. Frontal muscle scar U-shaped; middle two of four adductor scars larger. Small anterior and posterior vestibules. Radial pore canals few, simple. Antennula five- jointed (fourth and fifth podomeres fused). Male copulatory appendages with a prominent, coiled ductus ejaculatorius. Explanation of Plate 10, 30 Fig. 1, ?- 1 juv. LV, ext. lat. (syntype, 270 jum long); fig. 2,$LV, ext. lat. (1982.283, 290 pm long); fig. 3,?RV, ext. lat (1982.283, 290 /am long). Scale A (100|U.m; x 190), figs. 1-3. IT rr -t-r — i + + + 44 4 T-r + + 4 Stereo-Atlas of Ostracod Shells 10, 31 Nannocythere pavo (3 of 10) Remarks: Selected parts of Schafer’s (1953) generic diagnosis have been freely translated from the German with the assistance of S. Horne as follows: First antenna (= antennula) . . . “end part three- jointed, richly furnished with long and short setae; chelate setae absent.” Second antenna (= antenna) . . . “penultimate podomere unsegmented; terminal podomere bears two chelate setae of equal length”. Mandible . . . “with four-jointed palp . . . bearing respiratory plate with two setae.” Maxilla (=maxillula) . . . “(palp) with three normally formed endites and a distinct end segment . . .; respiratory plate without mouthward directed setae.” Legs . . . “setal formulae of basal podomeres: 221/211/210.” Furca . . . “with two setae.” Observations on the poorly preserved appendages of specimens available to us are consistent with this diagnosis. Moore (1961, Treatise on Invertebrate Paleontology, Q, Arthropoda 3 , Crustacea Ostracoda, Kansas; 353) regarded the affinities of Nannocythere as uncertain; Hartmann & Puri (1974, Mitt, hamb. zool. Mus. Inst., 70, 26) refer this genus to the Cytheridae. In our opinion, Nannocythere should be placed in the Loxoconchidae since it possesses a gongylodont hinge, anterior and posterior vestibules and few, simple radial pore canals. It may be distinguished from other loxoconchid genera by a combination of small size, presence of pore conuli and absence of a fulcral point. The type-species apparently lacks a reflexed seta on the respiratory plate of the maxillula; otherwise the appendages are loxoconchid in character. Explanation of Plate 10, 32 Fig. 1 , dear., ext. It. lat. ( 1982. 282, 330 pm long) ; fig. 2,dLV, ext. lat. ( 1982. 284, 300 pxa long) ; fig. 3,dRV, ext. lat. (1982. 285, 300 pm long). Scale A (100p.m; x 190), figs. 1-3. I I Jj I u -t-l-T- Stereo- Atlas of Ostracod Shells 10, 30 Nannoc.ythere pavo (2 of 10) — M-- --IT •~rr i-r- i i i i . j±. i i Stereo -Atlas of Ostracod Shells 10, 32 Nannocythere pavo (4 of 10) H r i -L±_l -4 — L- -T-l-f Type locality: Diagnosis: Figured specimens: Stereo- Atlas of Ostracod Shells 10, 33 Nannocy there pavo (5 of 10) Nannocy there pavo (Malcomson, 1886) 1886 Bythocythere pavo sp. nov. S. M. Malcomson, Rep. Proc. Belf. Nat. Fid Club, Appendix 9 (1884-5), 261, figs. 5-7. 1953 Nannocythere remanei sp. nov. H. W. Schafer , Hydrobiologia 5, 353, figs. 1-6. Syntype: A juvenile (-1?) left valve; Malcomson ostracod collection, slide 26, square 24; housed in the National Irish Museum, Dublin, Eire. Six miles off Black Head, Belfast Bay, N Ireland; approx, lat. 54° 56' N, 05° 42' W. Adults small (300-330 pm long); posterior margin truncate, dorsal and ventral margins parallel. Weak alar expansions present ventrolaterally, each terminating abruptly posteriorly in a small ornamented node. Seven anterior and four posterior radial pore canals, each opening at a marginal pore conulus. National Museum of Ireland specimen (syntype, ?-l juvenile LV: PI. 10, 30, fig. 1). Brit. Mus. (Nat. Hist.) nos. 1982. 282 (d car. : PI. 10, 32, fig. 1), 1982. 283 ( 9car. + appendages; LV: PI 10,30,fig.2; RV: PI. 10, 30, fig. 3; PI. 10, 36, fig. 2; Text-fig. 1; appendages: Text-figs. 3a-e), 1982.284 (dLV: PI. 10, 32, fig. 2; PI. 10, 34, fig. 3; PI. 10, 36, figs. 3, 5, 6; Text-fig. 2), 1982.285 (cTRV; PI. 10,32, fig. 3; PI. 10, 34, fig. 2; PI. 10, 36, figs. 4, 7), 1982.286 (dear. + appendages; car.: PI. 10, 34, fig. 1 ; PI. 10, 36, fig. 8; appendages: Text-figs. 3f-h), 1982.287 ( LV: pi. 10, 40, fig. 2; RV; pi. 10, 42, figs. 2-3, pi. 10, 46, figs. 1-4), 1982.195 (juv.-2; LV: pi. 10, 40, fig. 3; RV: pi. 10, 44, fig. 3), 1982. 196 (d car.: pi. 10, 44, fig. 1), 1982.197 (9 car.: pi. 10, 44, fig. 2), 1982. 198 ( 9 RV: pi. 10, 48, fig. 1), 1982. 199 (cfLV: pi. 10, 48, figs. 2-3), 1982.200 ( d appendages: text-figs, la, 3b), 1982.201 (rfLV; text-fig. lb), IO 6739 ( 9 LV : pi. 10, 50, fig. 3). 1982.247 (cfRV: pi. 10, 50, fig. 1), 1982. 248 (9 RV: pi. 10,50, fig. 2). 1982. 193-200 all from the A. M. Norman collection; 1982. 193, 195, 196, 197 from Lervig (Larvik), Norway (approx, lat. 59° 05' N, long. 10° 00' E), ex slide no. 1911.11.8 M3277; 1982.194, 200 from Hollingspollen, Drobak, Norway (approx, lat. 59° 40' N, long. 10° 40' E), ex slide no 1900-3-6-249; 1982.198, 199 from Holsteinbourg Harbour, W Greenland (approx, lat. 66° 55' N, long. 53° 35' W), ex slide no. 1911.11.8. M3281. 1982.201 collected alive off W Mersea, Blackwater Estuary, SE England (approx, lat. 51° 45' N, long. 00° 55' E) in September 1974, and 106739 from the Pleistocene (Hoxnian) Bridlington Crag of NE England, both provided by J. E. Robinson. 1982.247, 248 from Recent sediments in the Gulf of Alaska provided by E. Brouwers; 1982.247 from 101m depth, lat 60° 01.0' N, long. 143° 09.3' W (EGAL-75-KC 338) and 1982.248 from 115 m depth, lat. 59° 47.4' N, long. 142° 14.4' W (EGAL-75-KC 285). Explanation of Plate 10, 44 Fig. 1,<3 car., ext. dors. (1982.196, 1080ju,m long); fig. 2,?car., ext. dors. (1982.197, 1070/um long); fig. 3, juv. (-2) RV, ext. lat. (1982.195, 680/u.m long). Scale A (250,1011; x 60), figs. 1-3. rr rr -t-t — i — -H— t— -i 4-1— _l±_l 7 t7 Stereo-Atlas of Ostracod Shells 10, 45 Robertsonites tuberculatus (7 of 14) -M-4 Diagnosis: Valves with reticulate ornament modified by the presence of five or six nodes or tubercles; the sub- central, postero- dorsal and postero- ventral nodes are the most prominent, while weaker nodes may be seen posteriorly, antero-dorsally and antero-ventrally. Male copulatory appendage with a long, tapering distal process directed anteriorly and two smaller processes directed ventrally and posteriorly. Remarks: Hazel (1967, op. cit.) has shown the holotypes of R. gubikensis Swain and R. tuberculatina Swain to be female and male respectively of R. tuberculatus. As Hazel and other authors have remarked, R. tuberculatus exhibits considerable variation in outline and ornament. The development of the nodes and reticulation is very variable; the nodes may be more conspicuous in juvenile specimens, while in adults they are often obscured by strong primary and secondary reticulation. Specimens from Greenland (see pi. 10, 48, figs. 1-2) have more conspicuous secondary reticulation and are larger than those from Norway (see pi. 10, 40, figs. 1-2. and pi. 10, 42, figs. 1-2) but a comparison of their male copulatory appendages, which are identical, has shown them to be conspecific. Specimens from the Alaskan Shelf (see pi. 10, 50, figs. 1-2) are less elongate and have more prominent nodes than those from Greenland and Norway. Unfortunately I have been unable to obtain male copulatory appendages from Alaskan material. Explanation of Plate 10, 46 Figs. 1-4. $RV (1982.194, 1020/xm long): fig. 1, int. lat., figs. 2, 3, anterior and posterior hinge elements, fig. 4, int. muse. sc. Scale A (250^m ; x 60), fig. 1 ; scale B (100 (im; x 210), figs. 2-4. I I I I I I Lli I I I I I I I I I I I I 1~"M Stereo- Atlas of Ostracod Shells 10, 44 i i i i J -i Robertsonites tuberculatus (6 of 14) t— 1-1- i-i-i- -i~r “IT t- r — i_ i — 1 4- H Stereo- Atlas ot Ustracod Shells 10, 4b Robertsonites tuberculatus (8 ot 14J t-r -n — |- 1TT l-L- -±LJ -T-t— t Stereo-Atlas of Ostracod Shells 10, 47 Robertsonites tuberculatus (9 of 14) Text-fig. 1. a: d'copulatory appendage (1982.200); b.dLV (1982.201) drawn in transmitted light; dotted lines show approximate positions of nodes. Explanation of Plate 10, 48 Fig. 1,9 RV, ext. lat. (1982. 198, 1100 pm long); figs. 2, S-c/LV ( 1982. 199, 1210 pm long), fig. 2, ext. lat., fig. 3, detail of antero-central region. Scale A (250pm; x 60), figs. 1-2; scale B (50pm; x 320), fig. 3. --t-t -i .J4J - H — t -Tf •tr- .1L. I I Stereo- Atlas of Ostracod Shells 10, 49 Distribution: Robertsonites tuberculatus (11 of 14) Recent: most abundant in Arctic seas (Neale & Howe, op. cit.) ; N Atlantic, coasts of NW Europe from N Norway to southern N Sea, Greenland and NE America (Hazel, op. cit., and herein) ; Gulf of Alaska (herein); sublittoral. Pleistocene: British Isles (Brady, Crosskey & Robertson, op. cit., and herein), Norway (Sars, op. cit.), NE America (Cronin, op. cit.), and Alaska (Swain, op. cit.). Explanation of Plate 10, 50 Fig. l,dRV, ext. lat. (1982.247, 1020pm long); fig. 2,9 RV, ext. lat. ( 1982. 248, 940pm long); fig. 3,9LV, ext. lat. (IO 6739, 1010pm long). Scale A (250p.ni; x 60), figs. 1-3. I I I .L-LJ. -i— M-- Stereo- Atlas of Ostracod Shells 10, 48 Robertsonites tuberculatus (10 of 14) H- t -r Stereo- Atlas of Ostracod Shells 10, 50 i IT7 '7T7 I < I rtf Robertsonites tuberculatus (12 of 14) l 4. 1_ J_ i * l I I Lii ' I I I I I I I *" t I I Stereo-Atlas of Ostracod Shells 10, 51 Text-fig. 2. cf appendages (1982.193), a: antennula; b: antenna; c: mandible; d: maxillula. — l_i_ l i i i i i i i -i-r Robertsonites tuberculatus (13 of 14) 1-1-- -M-- '“IT -+- Stereo-Atlas of Ostracod Shells 10, 52 Robertsonites tuberculatus (14 of 14) Text-fig. 3. d appendages; a: third leg (1982.193); b; second leg (1982.200); c: first leg (1982.193). -t-r- - ■ .4—4 --L±J Stereo-Atlas of Ostracod Shells 10 (9) 53-62 (1983) 595.337.14 (119.1 + 119.9) (261.1 + 268.162.067.60; 162.019.72 + 161.011.58; 161.001.52) Baffinicy there howei (1 of 10) 551.351 ON BAFFINICYTHERE HOWEI HAZEL by David J. Horne and John E. Whittaker ( City of London Polytechnic & British Museum ( Natural History), London) Genus BAFFINICYTHERE Hazel, 1967 Type-species: Cythere costata Brady, 1866 ( non M’Coy, 1844 ) = Baffinicythere howei Hazel, 1967 1967 Baffinicythere gen. nov., J. E. Hazel, U.S. Geol. Survey Prof. Paper 564, 16 Diagnosis: Carapace elongate subrectangular (male) to subtrapezoidal or auriform (female) in lateral view. Ornament strongly reticulate, with prominent ridges forming triangle in postero-lateral region. Marginal pore canals numerous, swollen at mid-length. Small anterior and posterior vestibules. Hinge robust, holamphidont. Ocular sinus conspicuous. Adductor muscle scars: a single elongate dorsal scar, two rounded dorso-median scars, an elongate ventro-median scar showing incipient subdivision, and an elongate ventral scar. Three rounded frontal scars. Antennula with five articulated podomeres. Male copulatory appendage with large basal capsule, small distal process and inconspicuous ductus ejaculatorius . Remarks: The appendages of Baffinicythere are typically hemicytherid. Hazel (1967, op. cit.) established this genus for two species, the genotype and Cythereis emarginata Sars, 1866. From our comparison of both species we would prefer to place C. emarginata in Hemicythere Sars, 1925, since it has only two frontal muscle scars and a male copulatory appendage with a conspicuous ductus ejaculatorius. In our view, Baffinicythere is monospecific, although we have been informed of several as yet undescribed Pleistocene to Recent species of this genus found in the northern Pacific Ocean (Dr J. E. Hazel, pers. comm.). Explanation of Plate 10, 54 Fig. l,cfLV, ext. lat. ( 1. 22.08, paralectotype; 1,200 ^un long); fig. 2,9 LV, ext. lat. ( 1. 22.09, lectotype; 1,140/xm long); fig. 3.9RV, ext. lat. (1983.1; 1,200/xm long). Scale A (250/xm; x 50), figs. 1-3. -T + + - - + + - + + 44J- - + + + - Stereo-Atlas of Ostracod Shell 10, 55 Baffinicythere howei (3 of 10) Remarks (cont.): Baffinicythere differs from related Elofsonella Pokorny, 1955 (type-species Cythere concinna Jones, 1857) in having the ventro-median adductor muscle scar undivided, and in the nature of the surface ornament. 1866 1874 1967 1967 1967 1975 Baffinicythere howei Hazel, 1967 Cythere costata sp. nov. G. S. Brady, Trans, zool. Soc. Lond., 5, 375, pi. 60, figs. 5a-f. (non M’Coy, 1844). Cythere costata Brady; G. S. Brady, H. W. Crosskey and D. Robertson, Palaeont. Soc. Lond., 166-167, pi. 5, figs. 21-24. Baffinicythere costata (Brady); J. E. Hazel, U.S. Geol. Survey Prof. Paper 564, 17, pi. 2, figs. 7, 12-15, pi. 8, figs. 1-8. Baffinicythere howei nom. nov. J. E. Hazel, J. Paleont., 41, 1284. Hermanites costata (Brady); N. C. Hulings, Crustaceana, 13, 322, pi. 4, figs. 16-17, text-figs. 5A-E, 8M-N. Baffinicythere howei Hazel; J. W. Neale and H. V. Howe, Bull. Amer. Paleont., 65, (282), pi. 2. figs. 10, 12, 13, 15, 17. Lectotype: Female LV, Hancock Museum no. 1.22.09. (Paralectotype, male LV, no. 1.22.08). Hunde Islands, Baffin Bay, W Greenland, approx, lat. 68° 52' N, long. 53° 07' W, depth 60- 70 fathoms (110-128 metres); Recent. Figured specimens: Hancock Museum nos. 1.22.08 (dLV, paralectotype: pi. 10, 54, fig. 1), 1.22.09 ( 9LV, lectotype: pi. 10, 54, fig. 2), 1.22.10(d'RV: pi. 10, 56, fig. 2), 1.22. 11 ( 9RV: pi. 10, 56, fig. 3), 1.22.12(9car.: pi. 10, 58, fig. 1. British Museum (Natural History) nos. 1983.1 (9 RV: pi. 10, 54, fig. 3), 1983.2 (cfRV: pi. 10, 58, figs. 2-4), 1983.3 (c/LV: pi. 10, 56, fig. 1 ; pi. 10, 60, figs. 1-2), 1983.4 (d RV: text-fig. la; appendages: text-figs, lc, 2c, 3a-d), 1983.5 (9 RV: text-fig. lb; appendages: text- figs. 2a, b, d, e), OS. 7691 (cfRV: pi. 10, 60, fig. 3). The Hancock Museum specimens were taken from the Brady collection; the lectotype and paralectotype from syntypic slide no. 1. 10.36 (labelled “ Cythere costata (Brady), Hunde Islands”), no. 1.22. 10 from slide no. 1. 10.34 (from Uddevalla, Sweden, approx, lat. 58° 21 ' N, long. 1 1° 56' E), nos. 1.22.11 and 1.22. 12 from slide no. 1.10.35 (also from Uddevalla). Explanation of Plate 10, 56 Fig. l,dLV, ext. lat. (1983.3; l,180Mm long); fig. 2,dRV, ext. lat. ( 1.22. 10; 1,180/xm long); fig. 3,9RV, ext. lat. ( 1.22. 11; l,120Mm long). Scale A (250jum; x 50), figs. 1-3. -rr- -Tr- ,1L. I I J-L I I 1 l“T I I I Stereo-Atlas ot Ostracod Shells 10, 64 -t-r Baffinicythere howei (2 ot 10) i-ri-- J-L- •1T i -r- Baffinicythere howei (4 ot 10) — H -f- Stereo-Atlas of Ostracod Shells 10, 56 I I -4 — 14 i 1 I --LJ l . -T-l-f Stereo- Atlas of Ostracod Shells 10, 57 Baffinicythere howei (5 of 10) The Brit. Mus. (Nat. Hist.) specimens 1983.1-3 were taken from Norman collection slides labelled “Cythere costata”\ 1983.1 (ex slide no. 1911.11.8 M3346) is from the type locality, 1983.2 and 1983.3 (ex 1911.11.8 M3345) are from Unst Haaf, Shetland (approx, lat. 61° 00' N, long. 1°30' W). Nos. 1983.4and 1983. 5, from UngavaBay, Labrador (lat. 60° 08' N,long. 67°47' W), depth 73m, and off Shannon Island, E Greenland (lat. 75° 20' N, long. 19° 00' W), depth <200m, respectively, were kindly provided by Dr J. E. Hazel. No. OS 7691 was collected by Prof. D. Curry from the Butley Crag (Red Crag Series; pre-Ludhamian stage of the pre-glacial Pleistocene) at Neutral Farm, near Butley, Suffolk, England (approx, lat. 52° 05' N, long. 1° 30' E). Diagnosis: Carapace large (> 1.00mm long), strongly reticulate, with prominent sub-marginal curved rib running from just in front of eye-tubercle, converging with antero-ventral margin, and bending upwards posteriorly to meet anterior corner of postero-lateral triangle of ribs. Remarks: Brady’s syntypic material is housed in the Hancock Museum, Newcastle-upon-Tyne, on three separate slides, each containing several disarticulated valves, and numbered 1. 10.32, 1. 10.33 and 1.10.36. We have selected a lectotype from 1.10.36. Distribution: Recent: B. howei is a characteristic sublittoral marine Arctic species, most abundant in the Arctic Province, but extending south to about 59° N in the eastern N Atlantic (Norwegian Province) and about 41° N in the western N Atlantic (Nova Scotian Province), with an approximate depth range of 20-200m (Hazel, 1967, op. cit. ; Neale and Howe, 1975, op. cit.). Pleistocene: British Isles, including the Bridlington Crag (Hoxnian) of Yorkshire (Brady, Crosskey and Robertson, 1874, op. cit.) and the Red Crag (pre-Ludhamian) of East Anglia (herein). Where abundant, it may be taken to indicate cold temperate to frigid climatic conditions. Explanation of Plate 10, 58 Fig. 1,9 car. ext. dors. ( 1.22. 12; 1,160/xm long); figs. 2-4,dRV ( 1983.2; 1,180 pm long), fig. 2, int. lat., figs. 3-4, anterior and posterior hinge elements. Scale A (250p,m; x 50), figs. 1, 2 scale B (100 p,m; x 170), figs. 3, 4. --t-r-t- -444- Stereo-Atlas of Ostracod Shells 10, 59 Baffinicythere howei (7 of 10) Explanation of Text-Figure 1 a-b) RV’s drawn in transmitted light, showing marginal pore canals; a:cf(1983.4), b:9 (1983.5); scale A = 100pm. c)cfcopulatory appendage (1983.4); scale B = 100p.m. Explanation of Plate 10, 60 Figs. l-2,d'LV (1983.3; l,180p.m long), fig. 1, int. lat., fig. 2, int. muse, sc.; fig. 3,dRV, ext. lat. (OS 7691; l,080p.m long). Scale A (250p,m; x 50), figs. 1,3 scale B (100 p,m; x 210), fig. 2. -rr- -rr -1-1- ,1L. — i-r- Stereo- Atlas of Ostracod Shells 10, 58 Baffinicy there howei (6 of 10) i-ri- l-i--)- -14 H 4--+ + rl-r Stereo- Atlas of Ostracod Shells 10, 60 Baffinicythere howei (8 of 10) i i tT-r “tT-f I i i i i i _J4_|_ _L±_L. -l-T- Stereo- Atlas of Ostracod Shells 10. 61 Baffinicythere- howei (9 of 10) Explanation of Text-Figure 2 a, b, d, e)9 appendages (1983.5); a: antennula, b: antenna, d: mandibular palp, e: maxillula (palp and masticatory processes only), c) d spinneret seta (exopodite of antenna) (1983.4). Scale A = 100 p.m. -!- + +— -I— J-L. t~H-- Stereo- Atlas of Ostracod Shells 10, 62 Baffinicythere howei (10 of 10) Explanation of Text-Figure 3 d appendages (1983.4); a) first leg, b) second leg (basal podomere absent), c) third leg, d) mandible (distal part of palp absent). Scale A = 100p.m. ■t -r- J-L_ |_ I I I ' _ 4 — L 11J r- t-t Stereo- Atlas of Ostracod Shells 10 (10) 63-66 (1983) Poly cope foraminosa (1 of 4) 595.339.2 (119.9) (595:163.118.05) : 551.351 ON POLYCOPE FORAMINOSA HASAN sp. nov. by Manzoor Hasan ( University of Leicester, England) Polycope foraminosa sp. nov. Holotype: Type locality: Derivation of name: Figured specimens: Brit. Mus. (Nat. Hist.) no. OS 10132; RV. Darvel Bay, Malaysia, lat. 04° 44.5' N, long. 118° 30.0' E; Recent. Latin, foraminosus, full of holes; suggested by the puncta distributed over most of the shell surface. Brit. Mus. (Nat. Hist.) nos. OS 10132 (holotype, RV: PI. 10, 64, figs. 1, 3; PI. 10, 66, fig. 1); OS 10133 (LV: PI. 10, 64, fig, 2; PI. 10, 66, figs. 2, 3). Specimen OS 10132 (holotype) was collected from a depth of 34 fathoms; OS 10133 is from lat. 04° 40.2' N, long. 118° 44.0' E, collected from 40 fathoms. Both figured specimens are from Darvel Bay, Malaysia, collected by HMS Dampier in 1965. Explanation of Plate 10, 64 Fig. 1, RV, ext. lat. (holotype OS 10132, 414/um long.); fig. 2, LV, ext. lat. (OS 10133, 414/am long.); fig. 3, RV, ext. median region showing impression of the muse. sc. (holotype OS 10132). Scale A (100 /um; xl70), figs.l, 2; scale B (lO^m; x 1026), fig. 3. -t-r — i 41 — I H 4-U 44 4 T M Stereo- Atlas of Ostracod Shells 10, 65 Polycope foraminosa (3 of 4) -M- 4 Diagnosis: Remarks: Distribution: Rounded or subrounded puncta uniformly cover most of the shell surface. On the mid-ventral margin several delicate carinae branch, each to form a Y-shaped pattern; the stem of the Y is directed away from the margin. The valve is oval and the peripheral carina distinctly developed. Anterior process bears a subdued rostrum. Line of maximum height lies anterior to the mid- length. Line of maximum length passes through the centrally located muscle-scar region. Several delicate carinae are present on the periph- eral region. The muscle-scar is typical of the genus. The hinge is short. Polycope foraminosa sp. nov. has some similarity with the description of Polycope punctata Sars but clearly differs from it in the possession of branched carinae with Y-shaped pattern. Also, well developed rounded and subrounded puncta more uniformly cover most of the shell surface in P. foraminosa but in P. punctata Sars the puncta are not so well developed and numerous. Known only from Recent, Darvel Bay, Sabah, Malaysia. Explanation of Plate 10, 66 Fig. 1, RV, mid. vent, margin showing delicate Y-shaped carina (holotype OS 10132); fig. 2, LV, int. muse. sc. (OS 10133); fig. 3. LV. int. lat. (OS 10133). Scale A (15/u.m; x 1026), fig. 1; scale B (15/u.m x 659), fig. 2; scale C (100/xm; x 169), fig. 3. -Tf ■tp ,1L. I I I I I . Lll. I I I I I I I I -1--+T- I I Stereo- Atlas of Ostracod Shells 10. 64 Poly cope foraminosa (2 of 4) ■ 44 Stereo- Atlas of Ostracod Shells 10, 66 Polycope foraminosa (4 of 4) “IT -IT L 4— L 4-^ -Ll_l Stereo-Atlas of Ostracod Shells 10 (11) 67-70 (1983) Polycope choane (1 of 4) 595.339.2 (119.9) (595:163.118.05) : 551.351 ON POLYCOPE CHOANE HASAN sp. nov. by Manzoor Hasan ( University of Leicester , England) Polycope choane sp. nov. Holotype: Type locality: Derivation of name: Figured specimens: Brit. Mus. (Nat. Hist.) no. OS 10112; RV. Darvel Bay, Malaysia, lat. 04° 43.8' N, long. 118° 32.7' E; Recent. Greek, choane , funnel-shaped hollow; suggested by the presence of funnel pores on the shell surface. Brit. Mus. (Nat. Hist.) nos. OS 10112(RV:P1. 10, 68, figs. 1,3; PI. 10, 70, figs. 1-3), OS 10113 (LV: PI. 10, 68, fig. 2). Specimen OS 101 12 (holotype) is from 222 ft., collected in 1962. Specimen OS 101 13 is from lat. 04° 40.6' N, long. 1 18° 35 .3' E, from 35 fathoms, collected in 1965. Both figured specimens are Recent, from Darvel Bay, Malaysia, collected by HMS Dampier. Explanation of Plate 10, 68 Fig. 1, RV, ext. lat. (holotype, OS 10112, 439/Am long); fig. 2, LV, ext. lat. (OS 10113, 390/aiti long); fig. 3, RV, mid dorsal region showing elongate double pore (holotype, OS 10112). Scale A (100 pun; x 159), figs. 1, 2; scale B (25/Am; x 375), fig. 3. -r-t -t-n — 44 J T r-r Stereo-Atlas of Ostracod Shells 10, 69 + +•-+- Polycope choane (3 of 4) Diagnosis: Remarks: Distribution : Species of Polycope with ornament consisting of delicate dendritic and anastomising ridges which form characteristic scale-like pattern in the ventral region. Well developed funnel pores are scattered on the shell surface. Valve ovoid. Line of maximum length passes through the region of the muscle-scar. Line of maxi- mum height lies anterior to the mid-length. Funnel pores are rimmed and each pore has a single aperture. However, one specimen (the holotype) has a double-pore in the mid-dorsal region; it is elongate with two apertures separated by a dividing wall. Anterior process is well defined and protrusive. Hinge region is short and narrow. Muscle-scar is typical of the genus. Polycope choane sp. nov. is close to Polycope striata Muller ( Zool . Stat. Naples Monogr. 1894 (21), 236-237, pi. 8, fig. 24) but is more elongate in outline with distinctly pointed anterior and more narrowly rounded posterior end. Ornamentally the dendritic ridges of P. choane cut across secondary ridges ventrally, a feature lacking in P. striata. Known only from Recent, Darvel Bay, Sabah, Malaysia. Explanation of Plate 10, 70 Fig. 1, RV, int. lat. (holotype, OS 10112); fig. 2, RV, int. lat. muse. sc. (holotype, OS 10112); fig. 3, RV, vent., scale-like pattern (holotype, OS 10112). Scale A (100 /Am; x 166), fig. 1 ; scale B (25/Am; x 332), fig. 2; scale C (25/Am; x 664), fig. 3. I I I I I I Lll I l I I I I I I I I I t~"M Stereo- Atlas of Ostracod Shells 10, 68 i i Polycope choane (2 of 4) JJ -H i-rt-- — i- -i — — h J- 1_ - I I I I + - ~rr i i i i i i -14 I I I I I I I I -rr Stereo- Atlas of Ostracod Shells 10, 70 Poly cope choane (4 of 4) i H- t-r i i j- r r J I 4 I L I I I X±4__ T-f-t Stereo-Atlas of Ostracod Shells 10 (12) 71-74 (1983) Polycope regina (1 of 4) 595.339.2 (119.9) (595:163.118.05) : 551.351 ON POLYCOPE REGINA HASAN sp. nov. by Manzoor Hasan (University of Leicester, England) Polycope regina sp. nov. Holotype: Type locality: Derivation of name: Figured specimens: Brit. Mus. (Nat. Hist.) no. OS 10100; LV. Darvel Bay, Malaysia, lat. 04° 38.5' N, long. 118° 39.6' E; Recent. Latin, regina, queen; suggested by the fancied imagination that it is the beauty queen among Poly cope. Brit. Mus. (Nat. Hist.) nos. OS 10100 (holotype, LV: PI. 10, 72, figs. 2, 3; PI. 10, 74, figs. 1, 2); OS 10101 (RV: PI. 10, 72, fig. 1); OS 10102 (RV: PI. 10, 74, fig. 3). Specimen OS 10100 is from the type locality; OS 10101 is from lat. 04° 44.5' N, long. 118° 30.0' E; both from 34 fathoms, collected in 1965. OS 10102 is from lat. 04° 51.6' N, long. 118° 28.2' E, at 186 ft., collected in 1962. All figured specimens are Recent, from Darvel Bay, Malaysia, collected by HMS Dampier. Explanation of Plate 10, 72 Fig. 1, RV, ext. lat. (OS 10101, 487 long); fig. 2, LV, ext. lat. (holotype, OS 10100. 463 ftm long); fig. 3, LV, postero-dorsal region showing a minor axial carina along the centre of elongate fossa (holotype, OS 10100). Scale A (150jU,m; x 129), fig. 1; scale B (150/x.m; x 136), fig. 2; scale C (25/xm; x 512), fig. 3. rr rr -t-r-i-- -t-1-H -n- Stereo- Atlas of Ostracod Shells 10, 73 -44 4- Poly cope regina (3 of 4) Diagnosis: Remarks: Distribution: Species of Polycope having distinctly developed polygonal fossae with excavate muri. Fossae bear second order reticulations. A small almost obscure rostral incisure is present at the antero-dorsal margin. The second order reticulation inside the fossae is basically polygonal, sometimes showing a radial pattern, or showing a minor ‘axial’ carina along the centre of elongate fossae. The dorsal margin is strongly curved. In lateral view the ventral margin of the hinge extends ventrally slightly, obscuring part of the valve interior. Polycope regina sp. nov. with its polygonal reticulation pattern bears some similarity with the figures of Polycope orbicularis Sars, which also has polygonal reticulation. In P. regina sp. nov. however, the polygonal fossae are more well developed and have more complex fossae, especially the elongated ones bearing minor ‘axial’ carina. P. regina may be distinguished from P. reticulata Muller (Zool. Stat. Naples Monogr. 1894 (21), 235-6, pi. 8, fig. 20) by having a more oval outline in which the dorsal margin is more distinctly convex, and by having microreticulation within the primary reticulation. In P. regina sp. nov., between the postero-dorsal and mid-posterior regions the growth of a “flower-bud”-like structure with four nodes (PI. 10, 72, fig. 3) is variable; in some it is poorly developed and in others it is strongly developed. Known only from Recent, Darvel Bay, Sabah, Malaysia. Explanation of Plate 10, 74 Fig. 1 , LV, int. lat. (holotype, OS 10100, 463 /xm long); fig. 2, LV, int. lat. muse. sc. (holotype, OS 10100); fig. 3, RV, int. lat. (OS 10102, 439/u.m long). Scale A (150//,m; x 136), fig. 1; scale B (15ju,m; x 625), fig. 2; scale C (150^.m; x 141), fig. 3. TT rr XL I I ‘i“i r— 1-1- — f- -f- J_L 4--+ I I I LlX. I I I I I I I I i — i — r- i i i i i i i i i i i i i i Stereo- Atlas of Ostracod Shells 10, 72 Poly cope regina (2 of 4) Stereo-Atlas of Ostracod Shells 10, 74 Polycope regina (4 of 4) H- t — r Stereo- Atlas of Ostracod Shells: Vol. 10, Part 1 CONTENTS 10(1) 1-4 On Tallinnellina dissita Schallreuter & Sivetersp. nov.; by R. E. L. Schallreuter & D. J. Siveter. 10(2) 5-12 On Harperopsis scripta (Harper); by C. R. Jones & D. J. Siveter 10 (3) 13-16 On Vittella fecunda Siveter sp. nov.; by D. J. Siveter 10 (4) 17-20 On Sarlatina merlensis Babinot & Colin; by J. P. Colin 10 (5) 21-24 On Reginea reginae gen. et sp. nov.; by R. E. L. Schallreuter 10 (6) 25-28 On Bromidella sarvi Schallreuter; by R. E. L. Schallreuter 10 (7) 29-38 On Nannocy there pavo (Malcomson); by J. Athersuch & D. J. Horne 10 (8) 39-52 On Robertsonites tuberculatus (Sars); by D. J. Horne 10 (9) 53-62 On Baffinicythere howei Hazel; by D. J. Horne & J. E. Whittaker 10 (10) 63-66 On Polycope foraminosa Hasan sp. nov.; by M. Hasan 10 (11) 67-70 On Polycope choane Hasan sp. nov.; by M. Hasan 10 (12) 71-74 On Polycope regina Hasan sp. nov.; by M. 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