A Stereo -At las of Ostracod Shells edited by R.H. Bate, J. W. Neale, Lesley M. Sheppard and David J. Siveter Volume 7, Part 2; 19th December 1980 Published by The British Micropalaeontological Society in association with Robertson Research International Ltd., Llandudno, Wales 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. Ms. Lesley M. Sheppard, Department of Palaeontology, British Museum (Natural History), Cromwell Road, London SW7 5BD. Dr. David J. Siveter, Department of Geology, The University, Leicester LEI 7RH. Editorial Board Dr. Richard H. Benson, Smithsonian Institution, Washington, D.C., 20560. U.S.A. Dr. Alwine Bertels, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina. Dr. K. Ishizaki, Institute of Geology and Paleontology, Tohoku University, Sendai, Japan. Dr. C. W. Haskins, Robertson Research International Limited, ‘Ty’n-y-Coed’, Llanrhos, Llandudno, N. Wales, LL30 ISA. Dr. P. J. Jones, Bureau of Mineral Resources, P.O. Box 378, Canberra City, A.C.T. 2601 , Australia. Prof. Dr. E. Kempf, Geologisches Institut der Universitat Koln, Zulpicher Strasse 49, D-5 Koln 1, German Federal Republic. Dr. H. J. Oertli, S.N.P.A., Centre de Recherches, 64001 Pau, France. Prof. G. Ruggieri, Instituto e Museo di Geologia dell’Universita di Palermo, Corso Tukory, 131, 90134 Palermo, Italy. Mr. P. F. Sherrington, Petro-Canada, P.O. Box 2844, Calgary, Alberta T2P 2M7, Canada. Instructions to Authors Contributions illustrated by scanning electron micrographs of Ostracoda in stereo-pairs are invited. Full instructions may be obtained on request from any one of the Editors or Editorial Board. 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 the Editors. Completed papers should be sent to Ms. L. M. Sheppard, Department of Palaeontology, British Museum (Natural History), Cromwell Road, London SW7 5BD. Acknowledgments This Volume of the Stereo-Atlas has been aided by generous financial support from Robertson Research International Limited. Stereo -viewing for users of the Atlas In order to obtain maximum information and benefit from the use of the Stereo-Atlas it is essential that the user view the micrographs stereoscopically. Small pocket-sized stereo-viewers are most suitable for this purpose. Two suppliers are: C. F. Casella & Co. Ltd., Regent House, Britannia Walk, London N1 7ND and Air Photo Supply Corpn., 158 South Station, Yonkers, New York 10705. U.S.A. The front cover shows a ventral view of the Cretaceous Pattersoncypris micro papilosa Bate preserved with appendages. Plates reproduced by Torr of Silverstone, Northants., England. Stereo-Atlas of Ostracod Shells 7 (13) 73 - 76 (1980) Bulbosclerites unicornis (1 of 4) 595.337 (1 13.313) (492.71 : 1 6 1.008.54) : 551.35 + 552.55 ON BULBOSCLERITES UNICORNIS (NECKAJA) by Roger E. L. SchaDreuter (University of Hamburg, German Federal Republic) Bulbosclerites unicornis (Neckaja, 1952) 1952 Mica unicornis sp. nov. A. I. Neckaja, Trudy vses neft nauchno-issled. geol. - razv. Inst., 60 (= Mikro fauna SSSR 5), 217, 229, 230, pi. 3, figs. 1,2. 1962 Rectella unicornis (Neckaja); L. I. Sarv, Eesti NSV Tead. Akad. Geol. Inst, uurimused, 9, tab. 1 . 1967 Rectella ? unicornis (Neckaja); R. E. L. Schallreuter, Geologie, 16 (5), 616. 1973 Rectella unicornis Neckaja; A. I. Neckaja, Trudy vses neft nauchno-issled. geol. - razv. Inst., 324, 70. 1979 Bulbosclerites unicornis (Neckaja); R. E. L. Schallreuter, Taxonomy, Bio stratigraphy and Distribution of Ostracodes (Ed. N. Krstic), Proc. VII Internat. Symp. Ostracodes, 26. Holotype: Vsesojuznyj neftjanoj naucno-issledovatel’skij geologorazvedo£nyj institut (VNIGRI), Leningrad, no. 14 - 128, carapace. Type locality: Raion of Kamariku, Estonia; approx, lat. 59° 10' N, long. 26° 10* E. Porkuni Stage (F2), uppermost Ordovician. Explanation of Plate 7, 74 Fig. 1, LV, ext. lat. (GPIH 2343, 570 pm long); fig. 2, RV, ext. lat. (GPIH 2344, 620 pm long). Scale A (100 pm\ x 175), fig. 1 ; scale B (100 ^itm; x 1 55), fig. 2. r t I !-+■■ — J — -f~- Stereo-Atlas of Ostracod Shells 7, 75 Bulbosclerites unicornis (3 of 4) Figured specimens: Geologisch-Palaontologisches Institut, University of Hamburg (GPIH), nos. 2343 (LV: PI. 7, 74, fig. 1), 2344 (RV: PL 7, 74, fig. 2), 2345 (car.: PI. 7, 76, fig. 1) and 2346 (LV: PI. 7,76, fig. 2). All the figured specimens are from the Ojlemyrflint (Upper Ordovician) erratic boulder no. Sy 2 of the Kaolinsand (Pliocene-Pleistocene), near Braderup, Isle of Sylt (N Frisian Is., N Sea); lat. 54° 56' N, long. 8° 2 1 ‘ E; coll, by Ulrich von Hacht, 1976. Diagnosis: Species of Bulbosclerites with length up to 0.70mm. Length/height ratio >2.00. Posterodorsal process of the right valve is projected as a spine. Remarks: The type-species B. longa Kniipfer ( Freiberger ForschHft., ser. C, 234, 1968) is larger (0.78mm) and relatively higher (length/height ratio <2.00) and its posterodorsal process on the right valve is more bulb- like rather than spine-like as in B. unicornis. The latter possesses stop pegs in the left valve (see PI. 7, 76, fig. 2 and Schallreuter, 26, 1979). The spine in the holotype of B. unicornis (Neckaja, op. cit., pi. 3, figs. 1, 2) is considerably shorter than those in the specimens figured herein (PI. 7, 74, fig. 2; PI. 7, 76, fig. 1 ) ; it is possible that the material represents a distinct subspecies. The assignment of Parasclerites postnodus Blumenstengel (Ibid., 182, 1965) to the genus is questionable because of the more ventral position of the relatively weak, broad, knob-like inflation of the right valve. Distribution: Porkuni Stage (F2), uppermost Ordovician, of Estonia. Ojlemyrflint (Upper Ordovician) erratic boulders of the Isle of Gotland (Baltic Sea) and of the Kaolinsand (Pliocene — Pleistocene) of the Isle of Sylt (N Frisian Is., N Sea). Explanation of Plate 7, 76 Fig. 1, car., ext. vent. obi. (GPIH 2345, 575 pm long);fig. 2, LV, int. dors. obi. (GPIH 2346, 590 pm long). Scale A ( 1 00 pm ; x 1 70), figs. 1 , 2. TT Bulbosclerites unicornis (2 of 4) Stereo-Atlas of Ostracod Shells 7, 76 Bulbosclerites unicornis (4 of 41 Stereo-Atlas of Ostracod Shells 7, 74 I I + “*■— r Stereo-Atlas of Ostracod Shells 7 (14) 77 - 80 (1980) Pachydomelloides braderupensis (1 of 4) 595.337 (1 13.312) (492.71:161.008.54) : 551.35 + 552.55 ON PACHYDOMELLOIDES BRADERUPENSIS SCHALLREUTER sp. nov. by Roger E. L. Schallreuter (University of Hamburg, German Federal Republic ) Pachydomelloides braderupensis sp. nov. Geologisch-Palaontologisches Institut, University of Hamburg, no. 2460, LV. [Paratype: no. 2462, LV] . Middle Ordovician Hornstein erratic boulder no. Sy 52 of the Kaolinsand (Pliocene — Pleistocene), near Braderup, Isle of Sylt (N Frisian Is, N Sea), Germany; lat. 54° 56' N, long. 8° 2 1' E. After the type locality, Braderup, Isle of Sylt. Geologisch-Palaontologisches Institut, University of Hamburg (GPIH) nos. 2459 (RV: PI. 7, 78, fig. 1), 2460 (LV: PI. 7, 78, fig. 2), 2461 (LV: PI. 7, 80, fig. 1) and 2462 (LV: PI. 7, 80, fig. 2). From the lower Upper Viruan (Middle Ordovician) Hornstein erratic boulders nos. Sy 39 (2461) and Sy 52 (2459, 2460, 2462) from the type locality; coll, by Ulrich von Hacht, 1978. Holotype: Type locality: Derivation of name: Figured specimens: Explanation of Plate 7, 78 Fig. 1 , RV, ext. lat. (GPIH 2459, 617 pm long); fig. 2, LV, ext. lat. (GPIH 2460, 636 pm long). Scale A (100 pm\ x 145), fig. 1 ; scale B (100 pm\ x 125), fig. 2. - 4.4-4-- Stereo-Atlas of Ostracod Shells 7, 79 Pachydomelloides braderupensis (3 of 4) Diagnosis: Species of Pachydomelloides with length up to 0.64mm (holotype). Posterior end relatively broadly rounded. Sulcament not observed, perhaps lacking. Remarks: P. valcourensis Swain (/. Paleo., 36 (4), 739, 1962), the type-species, and P. imperfecta (Krause) (Z. Deutsch. geol. Ges., 48 (1896) (4), 935, 1897) are both much larger, being more than 1mm long. Both species possess an inner sulcament (subvertical ridge) which has not been observed in P. braderupensis, but this may be a factor of preservation or of infraspecific variation. Furthermore, in both species the posterior end of the left valve seems to be more acuminated (cf. Swain, op. cit., pi. Ill, fig. 8a) than in P. braderupensis. Stop pegs (stop ridges, internal prongs), present in P. braderupensis (PI. 7, 80, figs. 1, 2), were not mentioned in the description of the type-species but were observed by Krause (op. cit., 936, pi. 25 , fig. 1 1) in P. imperfecta. Distribution: Lower Upper Viruan (Middle Ordovician) Hornstein erratic boulders of the Kaolinsand (Pliocene — Pleistocene) near Braderup, Isle of Sylt (N Frisian Is, N Sea), Germany. Explanation of Plate 7, 80 Fig. 1 , LV, int. lat. (GPIH 2461, 622 pm long); fig. 2, LV, int. lat. (GPIH 2462, 633 pm long). Scale A (100 pm\ x 135), fig. 1 ; scale B (100 pm; x 140), fig. 2. Stereo-Atlas of Ostracod Shells 7, 78 Pachydomelloides braderupensis (2 of 4) Stereo-Atlas of Ostracod Shells 7, 80 Pachydomelloides braderupensis (4 of 4) Stereo-Atlas of Ostracod Shells 7 (15) 81 - 88 (1980) Cyprideis undosa (1 of 8) 595.337.14 (1 18.21) (460: 162.002.37) : 551.35 + 552.54 ON CYPRIDEIS UNDOSA VAN HARTEN sp. nov. by Dick van Harten (University of Amsterdam, The Netherlands) Cyprideis undosa sp. nov. 1980 Cyprideis sp., L.P.A. Geerlings et al., Proc. K. ned. Akad. Wet., Amsterdam, ser. B, 83, 29 - 37 (pars). Holotype: Geological Institute University of Amsterdam, coll. no. PA 8768, 9 LV. [Paratypes: Geological Institute, University of Amsterdam, coll. nos. PA 8769 - 8774] . Type locality: N bank of Rio Almanzora, approx. 5km NE of Vera, Province of Almeria, Spain; Grid Ref.; UTM 300.5, 763.5 (see text-fig. 1). Light greenish grey laminated marl with Chara and abundant brown reed-like plant remains; Messinian. Derivation of name: Latin undosus, full of waves; alluding to the sinuous course of ventral margin. Explanation of Plate 7, 82 Fig. 1 , 9 LV, ext. lat. (holotype, PA 8768, 890 pm long); fig. 2, 9 RV, ext. lat. (paratype, PA 8769, 880 pm long); fig. 3, 9 car., ext. dors, (paratype, PA 8770, 890 pm long). Scale A (250 pm\ x 70), figs. 1 - 3. Stereo-Atlas of Ostracod Shells 7, 83 Cyprideis undosa (3 of 8) Figured specimens: Geological Institute, University of Amsterdam, coll. nos. PA 8768 (holotype, 9 LV: PI. 7, 82, fig. 1), PA 8769 (9 RV: PI. 7, 82, fig. 2), PA 8770 (9 car.: PI. 7, 82, fig. 3), PA 8771 (9 LV: PI. 7, 84, fig. 1), PA 8772 (d LV: PI. 7, 86, fig. 1), PA 8773 (d RV: PI. 7, 86, fig. 3), PA 8775 (9 car.; PI. 7, 84, fig. 2), PA 8776 (9 RV: PI. 7, 84, fig. 3; PI. 7, 88, fig. 3), PA 8777 (9 RV: PI. 7, 86, fig. 2), PA 8778 (juv. - 1 RV: PI. 7, 88, fig. 1), PA 8779 (juv. - 1 RV: PI. 7, 88, fig. 2). All figured material is from the type locality near Vera, Spain; Grid Ref. UTM 300.5, 763.5; Messinian, light greenish grey laminated marl with Chara and brown reed-like plant remains; coll, by H. Dronkert and L.P.A. Geerlings. Diagnosis: Medium-sized species of Cyprideis with a sinuous ventral margin (notably so in the males) and conspicuous surface pitting. High noding potential (see text-fig. 2). Anterior margins non-denticulate. Right valve may carry up to two posteroventral spines. Remarks: As to size, ventral sinuosity and type of ornamentation, this species resembles Cyprideis seminulum (Reuss), in particular the subspecies C. seminulum portaferricum Krstic (see M. A. Bassiouni, Geol. Jb. B 31, 92, pi. 1, figs. 7 - 10, 1979). The two species significantly differ in the lateral outline of the posterior part of their shells, in their noding characteristics and in the presence of anteromarginal denticulation. At the type locality C. undosa sp. nov. is sympatric with C. agrigentina Decima ( Paleont . Ital. 57, 108, 1964) and C. calabra Decima (op. cit., 127). A shallow, oligohaline palaeoenvironment is inferred for the new species. Explanation of Plate 7, 84 Fig. 1 , 9 LV, ext. lat. (paratype, PA 8771, 890 pm long); fig. 2, 9 car., ext. vent. (PA 8775, 930 pm long); fig. 3, 9 RV, ext. lat. (PA 8776, 790 pm long). Scale A (250 /rm; x 70), figs. 1 , 2; scale B (250 pm ; x 71), fig. 3. Stereo-Atlas of Ostracod Shells 7, 84 Cyprideis undosa (4 of 8) I I I l Stereo-Atlas of Ostracod Shells 7, 85 Distribution: Cyprideis undosa (5 of 8) Outside the type locality C. undosa has been found in beds of comparable age near Sorbas, SE Spain. It seems to be associated with the freshening conditions that succeeded the deposition of evaporites in the Messinian of the western Mediterranean area (see T.B. Roep & D. van Harten, Ann. Geol. Pays Hellen., Tome hors serie, fasc. 3, 1037 - 1044, 1979 and Geerlings et al., op. cit.). The vertical range of the species is not known but probably rather restricted. Text-fig. 1. Map of Vera area. Type locality indicated with arrow. Explanation of Plate 7, 86 Fig. 1, 6 LV, ext. lat. (paratype, PA 8772, 900 long); fig. 2, 9 RV, int. lat. (PA 8777, 860 pm long); fig. 3,d RV, ext.lat. (paratype, PA 8773, 930 pm long). Scale A (250 pm; x 70), figs. 1 , 2; scale B (250 pm; x 65), fig. 3. -F— — i — Stereo-Atlas of Ostracod Shells 7, 87 Cyprideis undosa (7 of 8) Text-fig. 2. Ext. lat. view of 9 RV showing possible positions of nodes in Cyprideis undosa sp. nov. (A) as compared with Sandberg’s general scheme (B). B after Sandberg (1964). Acknowledgement: I am grateful to Hans Dronkert and Peter Geerlings who kindly provided the material on which this paper is based. Explanation of Plate 7, 88 Fig. 1 , juv. - 1 RV, int. lat. (PA 8778, 710 pm long); fig. 2,juv. - 1 RV, ext. lat. (PA 8779, 710 pm long); fig. 3, 9 RV, ext. lat., central group of nodes (PA 8776). Scale A (250 pm, x 86), figs. 1 , 2; scale B (100 pm; x 1 72), fig. 3. Stereo-Atlas of Ostracod Shells 7, 88 Cyprideis undosa (8 of 8) Stereo-Atlas of Ostracod Shells 7, 86 Cyprideis undosa (6 of 8) / Stereo-Atlas of Ostracod Shells 7 (16) 89 - 100 (1980) Cyprideis exuberans (1 of 12) 595.337.14 (1 18.21/1 18.22) (460:162.003.38) : 551.312.4 + 552.54 ON CYPRIDEIS EXUBERANS VAN HARTEN sp. nov. by Dick van Harten (University of Amsterdam, The Netherlands) Cyprideis exuberans sp. nov. Geological Institute, University of Amsterdam, coll. no. PA 8780, 9 LV. [Paratypes: Geological Institute, University of Amsterdam, coll. nos. PA 8781 - 8786] . N bank of Arroyo de Abejuela, W of bridge in road from Elche de la Sierra to Ferez, Province of Albacete, Spain; lat. 38° 22' N, long. 02° 03' W. Yellowish calcarenite with Chara and abundant small gastropods; lacustrine, Miocene — Pliocene. Latin exuberans, abounding; alluding to rather exaggerated nature of diagnostic features. Holotype: Type locality: Derivation of name: Explanation of Plate 7, 90 Fig. 1 , 9 LV, ext. lat. (holotype, PA 8780, 780 pm long); fig. 2, 9 RV, ext. lat. (paratype, PA 8782, 730 pm long); fig. 3, 9 car., ext. dors. (PA 8790, 790 pm long). Scale A (250 pm\ x 75), figs. 1 - 3. ■T H- F +-■ • *■-1-4-. I H-t- ■ 4.4™*.. Stereo-Atlas of Ostracod Shells 7,91 Cyprideis exuberans (3 of 12) Figured specimens: Geological Institute, University of Amsterdam, coll. nos. PA 8780 (holotype, 9 LV: PI. 7, 90, fig. 1), PA 8782 (9 RV: PL 7, 90, fig. 2), PA 8783 (6 RV: PI. 7, 92, fig. 2), PA 8784 (d LV: PI. 7, 92, fig. 1), PA 8785 (9 car.: PL 7, 94, fig. 3), PA 8786 (6 car.: PI. 7, 92, fig. 3), PA 8789 (d LV: PI. 7, 96, fig. 4), PA 8790 (9 car.: PI. 7, 90, fig. 3), PA 8791 Guv. - 1 LV: PI. 7, 98, fig. 2), PA 8792 Guv. - 1 LV: PI. 7, 98, fig. 1), PA 8793 Guv. - 1 RV: PI. 7, 100, fig. 2), PA 8794 (9 LV: PI. 7, 94, fig. 2), PA 8795 (9 LV: PI. 7, 96, fig. 3), PA 8796 (9 RV: PI. 7, 96, fig. 2), PA 8797 (9 RV: PI. 7, 94, fig. 1-, PI. 7, 96, fig. 1), PA 8798 Guv. - 1 RV: PI. 7, 98, fig. 3; PI. 7, 100, fig. 1), PA 8799 Guv. - 3 RV: PI. 7, 100, fig. 3). All figured material is from the type locality, between Elche de la Sierra and Ferez, Spain; lat. 38° 22' N, long. 02° 03' W; Miocene — Pliocene, yellowish calcarenite with Chara and abundant small gastropods; coll, by Dr. T. Geel. Diagnosis: Medium-sized species of Cyprideis with box-like shape and conspicuous surface pitting. High noding potential. Posteroventral node tends to be elongated and dorsoventrally compressed. Anomalous node may develop near posterodorsal corner. Anterior margins non-denticulate. Right valve with four posteroventral spines, some or all of which may be somewhat under-developed in the adults. Explanation of Plate 7, 92 Fig. 1, d LV, ext. lat. (paratype, PA 8784, 910 pm long); fig. 2, d RV, ext. lat. (paratype, PA 8783, 880 pm long); fig. 3, d car., ext. dors, (paratype, PA 8786, 890 long). Scale A (250 pm\ x 68), figs. 1 - 3. Stereo-Atlas of Ostracod Shells 7, 90 Stereo-Atlas of Ostracod Shells 7, 92 Cyprideis exuberans (4 of 1 2) Cyprideis exuberans (2 of 12) Stereo-Atlas of Ostracod Shells 7, 93 Cyprideis exuberans (5 of 12) Remarks: C. exuberans is a very distinctive species that is not likely to be confused with any other described taxon of the genus. The noding characteristics are quite exceptional in several respects. As many as seven nodes may develop on each valve but their location deviates from Sandberg’s well-known scheme (see text -fig. 1): there is an anomalous node position in the posterodorsal area whereas Sandberg’s position no. 5 is unoccupied (see P. A. Sandberg, Stockh. Contr. Geol., 12, 42, 1964). Another notable feature is that the whole of the population seems to be capable of developing nodes: among the adults of the type sample (i.e. 249 left valves, 238 right valves and 30 carapaces) not a single smooth shell was found. A third anomaly is that the species does not comply with the rule that nodes are more common on juveniles than they are on adults (Sandberg, op. cit., 47; see also T. I. Kilenyi, Micropaleontology, 18,47 - 63, 1972). In Cyprideis exuberans sp. nov. the nodes make their ontological appearance in the juvenile - 2, in the type sample c. 30% of the individuals being affected. In the penultimate instar all but very few of the right valves are noded whereas c. 25% of the left valves are smooth. To all appearance there is bimodality in the size distributions of the juv. - 1 and juv. - 2 instars (see text-figs. 2, 3). This is indicative of sexual dimorphism. As the same thing has been reported for C. baetica van Harten (D. van Harten, Scrip ta Geologica, 32, 6, 1975) and C. torosa (Jones) (W. - M. Rohr, N. Jb. Geol Paldont. Abh. 158, 346 - 380, 1979), the existence of pre-adult sexual dimorphism may well be a generic feature in Cyprideis. From the associated fauna and flora a shallow oligohaline, possibly even limnetic, palaeo- environment is inferred for the type sample. Explanation of Plate 7, 94 Fig. 1 , 9 RV, int. lat. (PA 8797, 730 pm long); fig. 2, 9 LV, int. lat. (PA 8794, 780 pm long); fig. 3, 9 car., ext. vent, (paratype, PA 8785, 800 pm long). Scale A (250 pm; x 75), figs. 1 - 3. tt-F ■«— !- + ■ r i — Stereo-Atlas of Ostracod Shells 7, 95 Cyprideis exuberans (7 of 12) Distribution: So far, the species is only known from the type locality. There is some doubt about the actual age of the stratum typicum. According to L. Jerez-Mir ( Geologia de la zona prebetica, en la transversal de Elche de la Sierra y sectores adyacentes, thesis University of Granada, 750 pp., 1973) the lacustrine deposits at issue most probably belong to the Upper Miocene; however, a Pliocene age would not be utterly out of the question (Jerez-Mir, op. cit., 505 - 508). Acknowledgement : I am indebted to Tiny Geel for providing the material on which this paper is based and for supplying information on the stratigraphical setting. Text-fig. 1. Ext. lat. view of 9 RV showing possible positions of nodes in Cyprideis exuberans sp. nov. (A) as compared with Sandberg’s general scheme (B). B after Sandberg (1964). Explanation of Plate 7, 96 Fig. 1, 9 RV, int. lat., muse. sc. (PA 8797); fig. 2, 9 RV, ext. dors. (PA 8796, 780 pm long); fig. 3, 9 LV, ext. dors., ant. and median hinge elements (PA 8795); fig. 4, 6 LV, ext. lat., detail of post. vent, area (PA 8789). Scale A (50 pm; x 375), fig. 1 ; scale B (250 pm; x 75), fig. 2; scale C (100 pm ; x 190), figs. 3,4. Stereo-Atlas of Ostracod Shells 7, 94 Cyprideis exuberans (6 of 1 2) Cyprideis exuberans (8 of 12) Stereo-Atlas of Ostracod Shells 7, 96 I I I 4--*- -I- Stereo-Atlas of Ostracod Shells 7, 97 0.6- + -*— r Cyprideis exuberans (9 of 12) 0.4 - • 1 • 2-3 • 4-7 • 8-15 • >15 • ••• •••• juv-2 juv-3 juv-4 1 1 i 1 L. 0.2 04 0.6 0.8 10mm LENGTH Text-fig. 2. Length/height diagram for left valves in type sample. Explanation of Plate 7, 98 Fig. 1 , juv. - 1 LV, ext. lat. (PA 8792, 700 pm long); fig. 2, juv. - 1 LV, ext. lat. (PA 8791, 680 pm long); fig. 3, juv. - 1 RV, int. obi., post. vent, spines (PA 8798). Scale A (250 /(m;x 81), figs. 1,2; scale B (50 pm-, x 407), fig. 3. — T"TT ' " " " — ■■ 1 1 -F ill 1 1 1 1 1 1 i ! 1 1- 1-4- - _ _ 1 1 1 1 1 1 1 1 1 1 1 1 i 1 i i i i i i ! i'i ! 1 " “ ... _ _ _ -j T 1 1 1 1 i 1 1 1 1 1 > 1 l 1 Hi l i l 1 Stereo-Atlas of Ostracod Shells 7, 99 Cyprideis exuberans (1 1 of 12) Text-fig. 3. Histogram of length for left valves in type sample. Explanation of Plate 7, 100 Fig. 1 , juv. - 1 RV, int. lat. (PA 8798, 650 pm long); fig. 2, juv. - 1 RV, ext. lat. (PA 8793, 640 pm long); fig. 3, juv. - 3 RV, ext. lat. (PA 8799, 410 ^m long). Scale A (250 pm\ x 8 1), figs. 1 , 2; scale B (1 50 pm\ x 145), fig. 3. Stereo-Atlas or Ostracod Shells 7, 100 Cyprideis exuberans ( 1 2 of 1 2) Stereo-Atlas of Ostracod Shells 7, 98 Cyprideis exuberans (10 of 12) Stereo-Atlas of Ostracod Shells 7 (17) 101 - 106 (1980) Xestoleberis postangulata (1 of 6) 595.337.14 ( 1 1 9.9) (267.8 : 16 1 .024.54) 551.351 ON XESTOLEBERIS POSTANGULATA BATE & SHEPPARD sp. nov. by Raymond H. Bate & Lesley M. Sheppard ( British Museum [ Natural History] , London ) Xestoleberis postangulata sp. nov. Holotype: Brit. Mus. (Nat. Hist.) 1980.147, 9 car. [Paratypes: Brit. Mus. (Nat. Hist.) 1980.148 - 154] Type locality: Abu Dhabi lagoon, central lagoon terrace, sample no. 6514b. Derivation of name: Pertaining to the distinct posteroventral projection on each valve. Figured specimens: Brit. Mus. (Nat. Hist.) nos. 1980.147 (holotype, 9 car: PI. 7, 102, fig. 1), 1980.148 (9 RV: PI. 7, 102, fig. 2), 1980.149 (9 LV: PI. 7, 102, fig. 3; PI. 7, 104, figs. 5, 6), 1980.150 (9 car: PL 7, 104, fig. 1), 1980.151 (9 car: PI. 7, 104, figs. 2, 9), 1980.152 (9 RV: PI. 7, 104, figs. 3, 4, 8), 1980.153 (LV: PL 7, 104, fig. 7). Diagnosis: Small oval Xestoleberis having sharply angled posteroventral corner. Hinge paraperatodont; sieve plates with central setal pore and two or three concentric rows of sieve pores. Anterior and posterior marginal canals branching. Explanation of Plate 7, 102 Fig. 1 , 9 car. It. lat. (holotype, 1980. 147, 417 pm long); fig. 2, 9 RV, ext. lat. (paratype, 1980.148, 417 /im long); fig. 3, 9 LV, int. lat. (paratype, 1980.149, 383 /im long). Scale A (100 pm; x 143), figs. 1,2; scale B (100 pm; x 151), fig. 3. T7 • Li. TT F +-• •I H-h- Stereo-Atlas of Ostracod Shells 7, 103 Xestoleberis postangulata (3 of 6) Remarks: X. postangulata is a rare member of the littoral phytal fauna of the Abu Dhabi lagoon and nearshore shelf. In the lagoon, the species is present within the deeper water channels (depth about 7m), near the entrance to the lagoon and on the shallower water terraces (see text-fig. 3). The species is dimorphic, dimorphism being recognised by the more slender outline of the males in dorsal view (6 paratype 1980.10 measuring length 417 pm; height 255 ^m; width 221 /jm.) By comparison the 9 holotype 1980.1 measures: length 417 ^mjheight 262 ^m; width 245 ^m. The hinge in X. postangulata is paraperatodont, a term introduced by Bate, 1972 {Spec. pap. Palaeont., 10, 45) for certain members of the Cytheruridae ; this type of hinge being characterised by having strongly developed dentition at the anterior and posterior ends of a smooth median element (see PL 7, 104, figs. 5, 6). In addition to the small sieve plates present on the lateral and ventral surfaces, a smaller number of simple, rimmed, normal pores are present (not figured here). Apart from the present species only X. ventribullata Hartmann, 1962 (Mitt. Hamburg Zool. Mus. Inst., 60, 227) from the Atlantic Coast of Argentina has a comparable posteroventral angular projection of the carapace but this is not so well developed as in X. postangulata. There is also a marked difference in the anterior margin of both species, that of X. ventribullata being very much broader than in X. postangulata (see text -fig. 2), while the anterior marginal canals are totally dissimilar. Explanation of Plate 7, 104 Fig. 1 , 9 car., ext. dors, (paratype, 1980.150, 408 pm long); fig. 2, 9 car., ext. vent, (paratype, 1980.151, 425 long); figs. 3, 6, 9 RV, hinge (paratype, 1980.152); figs. 4,5,9 LV, hinge (paratype, 1980.149); fig. 7, 9 LV, RPC (paratype, 1980.153); fig. 8, 9 RV, int. lat. (paratype, 1980.152, 417 pm long); fig. 9, 9 car. NPC sieve pi. (paratype, 1980.151). Scale A ( 1 00 p m; x 98), fig. 1 ; scale B ( 1 00 pm; x 94), fig. 2 ; scale C (200 pm; x 321 ), figs. 3, 4, 5 , 6; scale D (200 pm; x 236), fig. 7;scale E (100 pm; x 95), fig. 8;scale F (25 pm; x 1 190), fig. 9. Stereo-Atlas of Ostracod Shells 7, 104 Stereo-Atlas of Ostracod Shells 7, 102 Xestoleberis postangulata (2 of 6) Stereo-Atlas of Ostracod Shells 7, 105 Xestoleberis postangulata (5 of 6) Text-fig. 1. Muscle scars, LV, paratype 1980.149 x 700. Text-fig. 2. Comparison of LV anterior outlines of: A - X. ventribullata Hartmann 1962. B - X. postangulata sp. nov. Stereo-Atlas of Ostracod Shells, 106 ■T-r-r ■ Xestoleberis postangulata (6 of 6) Text-fig. 3. Distribution of Xestoleberis postangulata sp. nov. within and outside Abu Dhabi lagoon. Arrows point to location of sample of which only those indicated, out of a total of 83, contained the species. Stereo-Atlas of Ostracod Shells 7 (18) 107 - 1 1 2 ( 1980) 595.337.14 (1 19.9X267.8) : 551.351 Quadraleberis exquisita (1 of 6) ON QUADRALEBERIS EXQUISITA BATE & SHEPPARD gen. et sp. nov. by Raymond H. Bate & Lesley M. Sheppard (British Museum [Natural History] , London) Genus QUADRALEBERIS gen. nov. Type species: Quadraleberis exquisita sp. nov. Gender: Feminine. Derivation of name: Latin quadrus, square — relating to the very square outline of the carapace + leberis, used here to relate the genus to the family Trachyleberideidae and not to the Latin word for skin. Diagnosis: Genus of Trachyleberideidae having quadrate (female) to rectangular (male) outline, dorsal and ventral margins straight and almost parallel. Eye node distinct. External muscle scar node absent. Carapace triangular in dorsal view, widening to posterior. Anterior and posterior margins spinose. Posterior ventro- lateral region with short but distinct projection. Hinge holamphidont. V-shaped frontal scar, undivided adductors. Normal pore apertures simple; anterior marginal pore canals long, slender, numerous; duplicature broad, without a vestibule. LV larger than RV. Explanation of Plate 7, 108 Fig. 1, 6 LV, ext. lat. (holotype, 1980.155, 950 /. im long); fig. 2, d RV, ext. lat. (paratype, 1980.156, 900 pm long); fig. 3, 9 RV, ext. lat. (paratype, 1980.157, 880 /um long). Scale A (200 x 63), fig. 1 ; scale B (200 pm\x 67), figs. 2, 3. ■f' L-L_.|— —*—*—*— Stereo-Atlas of Ostracod Shells 7, 109 Quadraleberis exquisita (3 of 6) Remarks: Quadraleberis, although lacking an external muscle scar node typical of the Trachyleberideidae is, nevertheless, considered to belong to this family on all the other characters of the carapace. Quadracy there Hornibrook, 1952 has a divided frontal scar as well as a ventrolateral keel and is easily distinguished on this evidence (as also is the subgenus Homibrookella Moos, 1965). Similarly, Bensoncythere Hazel, 1967 has a divided frontal scar and thus belongs to the Hemicytheridae. Robertsonites Swain, 1963 is a trachyleberid genus having a quadrate outline but that is perhaps the only similarity when compared with Quadraleberis. Although there are a number of genera that superficially appear to have features in common with Quadraleberis this is not borne out on closer examination. Indeed, it is considered that our new genus most probably represents a new subfamily of the Trachyleberideidae characterised by the absence of an external muscle scar node. Quadraleberis exquisita sp. nov. 1976 Quadracy there (Quadracy there) sp. A Kwang Ho Paik, Doctorate Diss. Univ. Kiel, 85, pi. 6, figs. 101 - 104. 1977 Quadracythere (Quadracy there) sp. A Kwant Ho Paik, “Meteor” Forsch-Ergebnisse, C, 28, pi. 6, figs. 101 - 104. Holotype: Brit. Mus. (Nat. Hist.) no. 1980.155, d LV. [Paratypes; Brit. Mus. (Nat. Hist.) nos. 1980.156 - 161] . Type locality: Sample G3 station 2, Persian Gulf (see text-fig. 2). Figured specimens: Brit. Mus. (Nat. Hist.) nos. 1980.155 (holotype, <3 LV: Pl. 7, 108, fig. 1; PI. 7, 110, fig. 2), 1980.156 (d RV: PI. 7, 108, fig. 2), 1980.157 (9 RV: PI. 7, 110, fig. 7), 1980.158 (d RV: PI. 7, 110, figs. 1, 3, 4), 1980.159 (9 RV: PI. 7, 108, fig. 3), 1980.160 (juv. RV: PI. 7, 1 10, fig. 6), 1980.161 (9 RV: Text-fig. 1). Explanation of Plate 7,110 Fig. 1, muse. sc. (paratype, 1980.158); fig. 2, ornament (holotype, 1980.155); figs. 3, 4, d RV, terminal hinge elements (paratype, 1980.158); fig. 5, 9 LV, ext. lat. (specimen lost); fig. 6, juv. RV, ext. lat. (paratype, 1980.160, 680 pm long); fig. 7, 9 RV, dors, (paratype, 1980.157, 825 pm long). Scale A (20 pm\ x 550), fig. 1 ; scale B (50 pm\x 211), fig. 2; scale C (100 pm\ x 5 1), figs. 3,4; scale D (200 pm\ x 51), fig. 5 ; scale E (200 pm,x 66), fig. 6; scale F (100 ^m; x 109), fig. 7. + -+-1- — Stereo-Atlas of Ostracod Shells 7,111 Quadraleberis exquisita (5 of 6) Diagnosis: Quadraleberis with a striking trefoil ornamentation arranged anteriorly in rows paralleling anterior margin, elsewhere more irregular with some tendency towards being concentrically aligned. Intensity of ornamentation greater in juvenile instars. Hinge holamphidont with dentate/loculate median element. Up to 46 long, slender, anterior marginal canals. Remarks: Quadraleberis exquisita sp. nov. has the same trefoil ornamentation as described for Anebocythereis amoena Bate, 1972 {Spec. pap. Paleont., 10, 53, pi. 14, figs. 1, 2) but differs generically on carapace outline. Indeed the very angular outline of this species clearly sets it apart from all other members of the Trachyleberideidae. The muscle scars (PI. 7, 110, fig. 1) are typical of this family though the absence of a muscle scar pit (and external node) are in constrast with members of the Trachyleberideinae. This species has been described by Paik 1976 from the deeper waters of the Persian Gulf with sizes ranging between 0.80 - 0.82mm for the female and 0.86 - 0.90mm for the male. The length of our specimens is slightly larger than this with, at the same time, a slightly increased number of anterior marginal canals (up to 46 instead of 39 - 42). There is no doubt, however, that our species is the same as that described by Paik. Distribution: Recorded here from stations G6 st6 (lat. 26° 35' N, long. 53° 24' E) and G3 st2 (lat. 26° 10' N, long. 55°20'E) in the deeper waters of the Persian Gulf from material collected by Dr Graham Evans, Imperial College, London in 1962. Paik’s material, collected during the “Meteor”-Expedition in 1965, also comes from the deeper water of the Gulf, as well as from the Gulf of Oman, from depths ranging from 63 to 196 metres and from a calc, marl substrate. Shallow water faunas described by Jain, 1978 {Bull. Ind. Geol. Assoc., 11) from the West Coast of India do not contain this species even though many other species are common to the two regions. Water depth is thus an important factor in the distribution of Q. exquisita. Stereo-Atlas of Ostracod Shells 7,112 Quadraleberis exquisita (6 of 6) Text-fig. 1, anterior marginal pore canals, 9 RV. 1980.161 x 148. Text-fig. 2, distribution of Quadraleberis exquisita gen. et sp. nov. in the deeper water regions of the Persian Gulf. Type locality, sample G3 st. 2, ringed. r v Stereo-Atlas of Ostracod Shells 7 (19) 1 13 - 1 16 (1980) 595.337.14 (1 16.222X420:161.002.51) : 55 1 .35 + ? 55 1 .3 1 3.1 + 552.54 Micropneumatocy there tumida (1 of 4) ON MICROPNEUMATOCYTHERE TUMIDA STEPHENS & WARE sp. nov. by Jill Stephens and Martin Ware (Soekor, Johannesburg; University College of Wales, Aberystwyth) Micropneumatocy there tumida sp. nov. Holotype: Brit. Mus. (Nat. Hist.) OS 11739, 9 LV. [Paratypes: Brit. Mus. (Nat. Hist.) nos. OS 11740 - 11746] . Type locality: Kirtlington Mammal Bed (see E. F. Freeman, Palaeontology, 22 (1), 135 - 166, 1979), Forest Marble, Upper Bathonian, Old Cement Works quarry, Kirtlington, Oxfordshire. Nat. Grid Ref.: SP 494199. Derivation of name: Latin tumidus, swollen: refers to ventrolateral tumidity. Figured specimens: Brit. Mus. (Nat. Hist.) nos. OS 11739 (holotype, 9 LV: PI. 7, 114, fig. 1; PI. 7, 116, fig. 4), OS 11740 (9 RV: PI. 7, 114, fig. 2), OS 11741 (d LV: PI. 7, 114, fig. 3), OS 11742 (d RV: PI. 7, 1 14, fig. 4; PI. 7, 116, fig. 5), OS 11743 (d car.: PI. 7, 116, fig. 1), OS 11744 (9 LV: PI. 7, 1 16, fig. 2), OS 11745 (d RV: PI. 7,116, fig. 3), OS 1 1746 (d RV: PI. 7, 1 16, fig. 6). All from the type locality and horizon. Diagnosis: An inflated, dimorphic species of Micropneumatocy there, suboval in lateral outline, with maximum tumidity at midlength ventrolaterally and strong ventral overlap. Cardinal angles indistinct. Surface ornamented with faint open reticulation and fine punctae. Normal pore canals contain sieve-plates. Other features as for genus. Explanation of Plate 7,114 Fig. 1 , 9 LV, ext. lat. (holotype, OS 11739, 530 pm long); fig. 2, 9 RV, ext. lat. (paratype, OS 11740, 470 pm long); fig. 3, d LV, ext. lat. (paratype, OS 11741, 580 pm long);fig. 4, d RV, ext. lat. (paratype, OS 11742, 570 pm long). Scale A (200 pm; x 82), fig. 1 ; scale B (200 ^m; x 86), fig. 2; scale C (200 pm\ x 81), fig. 3; scale D (200 pm; x 88), fig. 4. ■I 1 — K Stereo-Atlas of Ostracod Shells 7,115 Micropneumatocy there tumida (3 of 4) Range (Mean): 99 LV 99 RV ddLV dd RV Length pm (10 valves) 470-550 (501) 460-510(479) 560- 580 (575) 550 -600 (567) Height pm (10 valves) 340 - 390 (359) 300- 330 (313) 340 - 370 (356) 300-350 (323) Remarks: At the type horizon Micropneumatocy there tumida was associated with M. brendae Sheppard, M. postrotunda Bate, M. subconcentrica (Jones), and M. cracens Bate & Sheppard. As with M. cracens, males of M. tumida are the more distinctive, readily distinguished from all known members of the genus by their midlength tumidity. Females are very similar to those of M. brendae and M. falcata Sheppard. They are distinguished from smooth forms of M. brendae by their characteristic tumidity, a less strongly arched LV dorsal outline, and absence of vertical ridges in the accommodation groove. They have a shorter caudal process than M. falcata, the LV posterodorsal slope is convex rather than slightly concave, and maximum tumidity is more ventral. Sieve-plates have not previously been recorded in this genus. M. tumida also exhibits precocious sexual dimorphism. Because of the mixed assemblages from which M. tumida has been recovered, its salinity tolerance is uncertain: it was probably a shallow-marine species with only limited tolerance of brackish conditions. Distribution: M. tumida is known only from the type locality and the White Limestone and Forest Marble of the neighbouring Portland Cement Manufacturers’ quarry at Shipton-on-Cherwell (Nat. Grid Ref.: SP 477175). j. Explanation of Plate 7,116 Fig. 1 , d car., ext. dors, (paratype, OS 1 1743, 560 pm long); fig. 2, 9 LV, int. lat. (paratype, OS 11744, 550 pm long); fig. 3, d RV, hinge (paratype, OS 1 1745, 570 pm long); fig. 4, 9 LV, ornament and sieve-pores (holotype, OS 11739, 530 pm long); fig. 5, d RV, sieve-plate (paratype, OS 1 1742, 570 pm long); fig. 6, d RV, adductor scars (paratype, OS 1 1746, 570 pm long). Scale A (200 pm;x 83), fig. 1 ; scale B (200 pm, x 83), fig. 2; scale C (100 ^m; x 1 34), fig. 3; scale D (40 ^m; x 360), fig. 4; scale E (4 pm; x 1 ,813), fig. 5 ; scale F (40 pm; x 285), fig. 6. 1 I I I Micropneumatocy there tumida (2 of 4) Stereo-Atlas of Ostracod Shells 7,116 Micropneumatocy there tumida (4 of 4) Stereo-Atlas of Ostracod Shells 7,114 Stereo-Atlas of Ostracod Shells 7 (20) 1 17 - 124 (1980) Procytheropteron prolongatum (1 of 8) 595.337.14 (1 1 6.233)(47 : 1 6 1 .048.54) : 551.351 + 552.52 ON PROCYTHEROPTERON PROLONGATUM (SHARAPOVA) by Nicholas Fuller (University College, London) Procytheropteron prolongatum (Sharapova, 1939) 1939 Cytheropteron prolongatum sp. nov. E. G. Sharapova, Trudy NGRI, A126, 23, pi. 2, fig. 23. 1955 Protocythere prolongata (Sharapova, 1939); P. S. Lyubimova, Trudy VNIGRI, new series, 84, 1 12, pi. 8, figs. 2a - c. non v.1955 Cytheropteron cf. prolongatum (Sharapova, 1939);G. Schmidt, A bh. senckenb. naturf. Ges., 491, 60, pi. 2, fig. 34. 1978 Procytheridea prolongata (Sharapova, 1939); D. M. Pyatkova & M. N. Permyakova, Jurassic Foraminifera and Ostracoda of the Ukraine, 154, pi. 69, figs. 5a - d. Holotype: Collection of the Petroleum Geological Prospecting Institute (NGRI) Leningrad, no. 51 - 20. Type locality: Depth 267 - 273m in Well no. 1 , 1km E of the Lenin Farm, left bank of Chalykla River, along flank of the Ozinki Dome, in Western Obshchiy Syrt, Soviet Russia. Lower Volga stage, T. Perisphinctes panderi zone. 'T -i- Explanation of Plate 7,118 Fig. 1, 9 LV, ext. lat. (OS 11767, 520 pm long); fig. 2, 9 LV, int. lat. (OS 11768, 520 pm long); fig. 3, 9 RV, ext. lat. (OS 11769, 510 pm long). Scale A (100 pm', x 90), fig. 1 ; scale B (100 pm', x 100), fig. 2; scale C (100 pm\ x 105), fig. 3. F 4--LJ. I HI-' -j-J— 1~ Stereo-Atlas of Ostracod Shells 7,119 Procytheropteron prolongatum (3 of 8) Figured specimens: Brit. Mus. (Nat. Hist.) nos. OS 11767 (9 LV: PI. 7, 118, fig. l),OS 11768(9 LV: PI. 7, 1 18, fig. 2; PI. 7, 124, fig. 1), OS 1 1769 (9 RV: PI. 7,118, fig. 3), OS 11770 (d LV: PI. 7, 120, fig. 1), OS 1 1771 (9 RV: PI. 7, 120, fig. 2; PI. 7, 124, fig. 3), OS 11772 (6 RV: PI. 7, 120, fig. 3), OS 1 1773 (juv. A - 1 LV: PI. 7, 122, fig. 1; PI. 7, 124, fig. 5), OS 1 1774 (jiiv. A - 2 LV: PI. 7, 122, fig. 2), OS 1 1775 (juv. A - 3 LV: PI. 7, 122, fig. 3), OS 11776 (9 LV: PI. 7, 124, fig. 2), OS 11777 (9 RV: PI. 7, 124, fig. 4). Specimens OS 11773, OS 11776 from Bed 8 ( Subplanites pseudoscythicus Zone, Lower Volgian), others from Beds 3 and 4 ( Aulacostephanus autissiodorensis Zone, Upper Kimmeridgian) at Gorodische, 25km north of Ul’yanovsk, River Volga, U.S.S.R.. Bed numbers of Mesezhnikov, M. S., Dain, L. G., Kuznetsova, K. I. and Yakovleva, S. P., International Colloquium on Upper Jurassic stratigraphy and the Jurassic /Cretaceous boundary in the Boreal Realm - Jurassic /Cretaceous boundary beds in the Middle Volga area (A prospectus to Geological Excursions), All-Union Petroleum Research Geological Prospecting Institute, (VNIGRI), Leningrad, fig. 1, 1977. Explanation of Plate 7, 120 Fig. 1, d LV, ext. lat. (OS 11770, 545 pm long); fig. 2, 9 RV, int. lat. (OS 11771, 490 pm long); fig. 3, d RV, ext. lat. (OS 1 1772, 565 pm long). Scale A ( 1 00 pm ', x 1 00), fig. 1 ; scale B (1 00 pm \ x 110), fig. 2; scale C ( 100 pm \ x 95), fig. 3. r i — t — i i i i Stereo-Atlas of Ostracod Shells 7, 1 20 Procytheropteron prolongatum (4 of 8) Procytheropteron prolongatum (2 of 8) Stereo- Atlas of Ostracod Shells 7, 1 18 Stereo-Atlas of Ostracod Shells 7,121 Procytheropteron prolongatum (5 of 8) Diagnosis: Rectangular, inflated, tapering to prominent caudal process. Coarsely reticulate surface ornament. Narrow anterior marginal rim. Some sieve type normal pores, particulary in posterodorsal portion of valves. Anterior pore canals vary in number between 7 and 9, simple and relatively straight, widely spaced, not all reach margin. No pore canals observed in posterior region. Pronounced sexual dimorphism. Hinge hemimerodont, in the LV terminal crenulate sockets are separated by a smooth median bar. Adults and three juvenile stages recognised. Remarks: First assigned to the genus Cytheropteron Sars 1866 in 1939 by E. G. Sharapova, this ostracod lacks true Cytheropteron characters in having a smooth median hinge bar and no prominent posteroventral alar processes. Subsequently assigned to the genus Protocythere Triebel 1938 by P. S. Lyubimova (1955), this species is not considered to belong to the genus through lack of an antimerodont hinge and 3 characteristic longitudinal ridges of Protocythere. More recently D. M. Pyatkova and M. N. Permyakova (1978) attributed P. prolongatum to Procytheridea Peterson 1954, however this genus is also characterised by an antimerodont hinge, possesses wide marginal areas and has a different central muscle scar pattern. Some confusion also arises in assigning this species to the genus Procytheropteron as this genus has been described twice, first by P. S. Lyubimova (1955), whose description complies withP. prolongatum in all respects saving that she describes the radial pore canals as “frequent and present in great numbers at the anterior end”. In 1956 M. I. Mandelstam also described a genus Procytheropteron and P. prolongatum agrees more closely with his description, differing in one small detail, namely that Mandelstam’s genus has a gently convex LV dorsal margin. This difference is not considered significant here at a generic level. Explanation of Plate 7, 122 Fig. 1 , juv. A - 1 , LV, ext. lat. (OS 11773, 430 p m long); fig. 2, juv. A - 2, LV, ext. lat. (OS 1 1774, 415 pm long); fig. 3, juv. A - 3, LV, ext. lat. (OS 11775, 340 pm long). Scale A (100 pm; x 116), fig. 1 ; scale B (100 pm; x 1 20), fig. 2; scale C (100 pm; x 147), fig. 3. 'T ■H- if-f - •«— i-4~ Stereo-Atlas of Ostracod Shells 7, 1 23 Procytheropteron prolongatum (7 of 8) Remarks: Van Morkhoven ( Post-Palaeozoic Ostracoda, 2, 258 and 385, Elsevier, 1963) considers Procytheropteron (cont’d.) Lyubimova a synonym of Neocythere Mertens 1956. Neocythere s.s., however, possesses an amphidont hinge. The subgenus N. (Physocy there) Kaye 1963 has a merodont hinge, but lacks other features of Procytheropteron, notably the well developed caudal process. A caudal process is not specified in either diagnosis but is a feature of P. obesum Lyubimova 1955, the type-species of Procytheropteron. One feature of P. prolongatum not hitherto mentioned in any descriptions of this species is the presence of several well developed, though small “sieve-type” normal pores in the posterodorsal region (see PI. 7, 124, fig. 5). P. prolongatum is found in association with Galliaecytheridea miranda (Lyubimova), G. volgaensis (Mandelstam), G. mandelstami (Lyubimova), G. gorodischensis (Fuller and Lord), G. ramosa (Lyubimova), Protocythere bisulcata (Sharapova), Mandelstamia ventrocomuta (Sharapova), Oligocythereis kostytschevkaensis (Lyubimova) and Cytherella spp. Distribution: Upper Kimmeridgian, Lower and Middle Volgian of Gorodische in the Volga region; known also from the Ukraine. A similar form is recorded by G. Schmidt (1955, op. cit .) from 30km S of Hannover. Explanation of Plate 7, 1 24 Fig. 1, 9 LV, int. lat. muse. sc. (OS 11768); fig. 2, 9 LV, int. lat. hinge (OS 11776); fig. 3, 9 RV, int. lat. hinge (OS 11771); fig. 4, 9 LV, ext. lat. detail of ornament (OS 11777); fig. 5, juv. A - 1 , ext. lat. sieve pore (OS 11773). Scale A ( 100 pm; x 345), fig. 1 ; scale B (100 pm; x 195), fig. 2; scale C (40 pm; x 190), fig. 3; scale D (20 pm; x 370), fig. 4; scale E (4 pm; x 3700), fig. 5. TT -I — Stereo-Atlas of Ostracod Shells 7, 1 22 Procytheropteron prolongation (6 of 8) Stereo-Atlas of Ostracod Shells 7, 1 24 Procytheropteron prolongatum (8 of 8) ■W4 Stereo-Atlas of Ostracod Shells 7 (21) 125 - 130 (1980) Semicytherura tela (1 of 6) 595.337.14(119.9)(261.27:161.004.51 + 161.003.50; 261.28:161.002.44) : 551.351 + 551.313.1 ON SEMICYTHERURA TELA HORNE & WHITTAKER sp. nov. by David J. Horne and John E. Whittaker (Geology Department, Bristol University, and British Museum [Natural History] , London) Semicytherura tela sp. nov. 1969 Semicytherura nigrescens (Baird) pars; I. Yassini, Bull. Inst. Geol. Bassin Aquitaine, 7, 88, pi. 17. Holotype: Brit. Mus. (Nat. Hist.) 1980.134, 9 LV. [Paratypes: Brit. Mus. (Nat. Hist.) nos. 1980.135 - 139] . Type locality: Blue Anchor, Somerset, W England (S shore of Severn Estuary); approx, lat. 51° 12' N, long. 3° 24 W. Recent, littoral. Derivation of name: Latin, tela, ae — woven stuff or web. The fine ornamentation gives the carapace the appearance of being draped with cobwebs or fine netting. Explanation of Plate 7, 126 Fig. 1, 9 LV, ext. lat. (holotype, 1980.134, 360 pm long); fig. 2, d LV, ext. lat. (paratype, 1980.135, 380 pm long); fig. 3, juv. -1 LV, ext. lat. (paratype, 1980.136, 330 ,um long). Scale A ( 1 00 ; x 1 70), figs. 1-3. 14~ ■t — t-t- -H—h- Stereo-Atlas of Ostracod Shells 7,127 Semicytherura tela (3 of 6) Figured specimens: Brit. Mus. (Nat. Hist.) nos. 1980.134 (holotype, 9 LV: PI. 7, 126, fig. 1), 1980.135 ( d LV: PI. 7, 126, fig. 2; PI. 7, 128, fig. 3), 1980.136 (juv. -1 LV: PI. 7, 126, fig. 3), 1980.137 (9 LV: PI. 7, 128, fig. 1), 1980.138 (d car.: PI. 7, 128, fig. 2), 1980.139 (d copulatory appendage: Text-fig. 1). 1980.134 - 137, 139, collected alive from Cor allina officinalis in rocks-pools at the type locality by D. J. Horne, 22nd July 1978; salinity and water temperature ranged between 28.5 and 29.2%c , and 10 to 19°C, respectively, measured over a spring tide. 1980.138 was collected alive from Gadophora by J. E. Whittaker, at Osmington Mills, Weymouth Bay, S England (approx, lat. 50° 38‘ N, long 2° 23' W), 3rd August 1968; salinity 33.9%0 , water temperature 19°C. Diagnosis: Very small Semicytherura (<0.40mm long) with ornamentation of fine lateral ridges and associated rows of shallow pits, developing into reticulation in the posterior half. Males smaller, more elongate and inflated posteriorly. Copulatory organ characteristic, with a triangular lappet and a finger-like projection on the ventral margin. Explanation of Plate 7, 1 28 Fig. 1, 9 LV, int. lat. (paratype, 1980.137, 380 pm long); fig. 2, d car., ext. dors, (paratype, 1980.138, 370 pm long);fig. 3, d LV, detail of mid-posterior region (paratype, 1980.135). Scale A (100 ^m; x 1 70), figs. 1 , 2; scale B (10 pm \ x 1 ,100). fig. 3. — 4--j- - Stereo-Atlas of Ostracod Shells 7, 1 26 Semicytherura tela (2 of 6) Stereo-Atlas of Ostracod Shells 7, 128 Semicytherura tela (4 of 6) Stereo-Atlas of Ostracod Shells 7, 129 Semicytherura tela (5 of 6) Text-fig. 1, 6 rt. copulatory appendages (1980.139); text-fig. 2, 6 rt. copulatory appendage (1980.140) of Semicytherura nigrescens (Baird), shown for comparative purposes. Both come from specimens collected at Blue Anchor, Severn Estuary, from littoral algae. Stereo-Atlas of Ostracod Shells 7, 130 Semicytherura tela (6 of 6) Remarks: This species has probably been confused in the past with Semicytherura nigrescens (Baird) (see Whittaker, Stereo-Atlas of Ostracod Shells, 2, 69 - 76 1974), from which it can be distinguished by its smaller size, stronger ornamentation, and distinctive copulatory organ (cf. text -figs. 1 and 2). S. tela was found by one of us (J. E. W.) in the “type-material” of S. nigrescens sensu Yassini, from the Arcachon Basin, at Bordeaux University, and would seem to possess a more extensive geographical distribution than is at present recognised. It is much too small to be considered synonymous with S. similis (Sars, 1866). Distribution: Recent; S. tela has so far been recorded from three regions on the British coasts. In the Fieet and Weymouth Bay, S England, it was found on filamentous green-algae such as Enteromorpha and Cladophora, in salinities from 31 - 35%c , while in the Bristol Channel and Severn Estuary, it has been collected at several localities between Porlock Bay and Sand Point, in intertidal samples of Corallina, Laminaria holdfasts and Sabellaria worm-tubes, within the salinity range 20 - 35 %0 . K. Trier has recently sent us material collected from tidal pools in S W Wales. As mentioned above it also occurs in the Arcachon Basin, S W France. Stereo-Atlas of Ostracod Shells 7 (22) 131 - 134 (1980) Acanthocythereis decoris (1 of 4) 595.337.14 (1 18.14X549:161.070.29) : 551.35 + 552.52 on ACANTHOCYTHEREIS DECORIS SIDDIQUI by Qadeer A. Siddiqui (Saint Mary’s University, Halifax, Canada) Acanthocythereis decoris Siddiqui, 1971 1971 Trachyleberis (Acanthocythereis) decoris sp. nov. Q. A. Siddiqui, Bull. Brit. Mus. nat. Hist. (Geol.) Suppl. 9,83, pi 42 figs. 3 - 6, 8, 9. Holotype: Brit. Mus. (Nat. Hist.) 10 4359, <5 car. Type locality: Rakhi Nala section, Sulaiman Range, Pakistan; lat. 29° 57.5' N, long. 70° 60' E. Upper Chocolate Clays, Kirthar Formation, Upper Eocene. Figured specimens: Brit. Mus. (Nat. Hist.) nos. OS 10040 (9 car.: PI. 7, 132, fig. 1), OS 11737 (d car.: PI. 7, 132, figs. 2, 3; PI. 7, 134, figs. 1 - 3), both from the type locality above; Upper Chocolate Clays, sample no. 3604, Kirthar Formation, Middle Eocene. Explanation of Plate 7, 132 Fig. 1 , 9 car., ext. It. lat. (OS 10040, 765 pm long); fig. 2, d car., ext. rt. lat. (OS 1 1737, 791 pm long); fig. 3, d car., ext. post. (OS 1 1737). Scale A (200 /rm; x 77), fig. 1 ; scale B (200 pm; x 82), fig. 2; scale C (100 pm; x 96), fig. 3. F < — 1-4- I — (--»-■ Stereo-Atlas of Ostracod Shells 7, 133 Acanthocythereis decoris (3 of 4) Diagnosis: A species of Acanthocythereis in which the eye-tubercle is rounded and distinct; subcentral tubercle indistinct; shell surface reticulate with conjunctive papillae; anterior, posterior and ventral margin decorated with a double row of short spines and/or papillae. Remarks: The subcentral tubercle in this species seems to vary; in some specimens it is almost indistinct. In a few specimens papillose spines occur on shell surface. Distribution: Rakhi Nala and Zao River sections of the Sulaiman Range, Pakistan (Middle — Upper Eocene). Explanation of Plate 7, 134 Fig. 1 , d car., ext. dors. (OS 11737, 791 pm long); fig. 2, d car. , ext. vent. (OS 11737); fig. 3, d car., ext. ant. (OS 11737). Scale A (200 pm; x 79), fig. 1 ; scale B (200 pm ; x 82), fig. 2; scale C (100 pm; x 96), fig. 3. Stereo-Atlas of Ostracod Shells 7,132 Acanthocvthereis decoris (2 of 4) Stereo-Atlas of Ostracod Shells 7, 134 Acanthocythereis decoris (4 of 4) Stereo-Atlas of Ostracod Shells 7 (23) 135 - 138 (1980) Callistocy there mediterranea (1 of 4) 595.337.14 (118.22 + 1 19.1 + 1 1 9.9)(45 : 16 1 .0 14.4 1 + 560:161.038.26 + 036.35) 551.351 ON CALLISTOCYTHERE MEDITERRANEA (MULLER) by Neriman Doruk (Ege University, Izmir, Turkey) Callistocy there mediterranea (Muller, 1894) 1894 Cy there mediterranea sp. nov. G. Muller, Zool. stat. Naples, Monogr., no. 2 1 , 353, pi. 27, fig. 34; pi. 28, fig. 13 ; pi. 32, fig. 34. Holotype: Zoological Museum, Berlin (see Diebel, Geologie, 11, no. 2, 249, 1962). Type locality: Bay of Naples, Italy. Recent. Figured specimens: Brit. Mus. (Nat. Hist.) nos. Io 5175 (d RV: PI. 7, 136, fig. 1), Io 5176 (9 LV: PI. 7, 136, fig. 2; PI. 7, 138, figs. 1, 3), Io 5177 (<3 RV: PI. 7, 138, fig. 2). Io 5175 was dredged from Urla Bay, west coast of Turkey and is Subrecent, shallow water marine (littoral). Approx, lat. 38° 19' N, long. 26° 47' E. Io 5176 and Io 5177 were from drillings off the south coast of Turkey, 450ft. below sea floor, Plio-Pleistocene, presumed shallow water marine (littoral); approx, lat. 36° 26' N, long. 35° 04' E. Explanation of Plate 7,136 Fig. 1, 6 RV, ext. lat. (Io 5175, 512 pm long); fig. 2, 9 LV, ext. lat. (Io 5176, 532 pm long). Scale A (250 pm] x 166), fig. 1 ; scale B (250 pm\ x 156), fig. 2. Stereo-Atlas of Ostracod Shells 7,137 Callistocy there mediterranea (3 of 4) Diagnosis: Diagnostic rib pattern associated with nine anterior marginal deticulations. Remarks: Callistocy there mediterranea has not been rediscovered from the type locality since G. W. Muller’s first record. It seems, however, to be a common species in the Eastern Mediterranean. Distribution: Recent; Gulf of Naples and Urla Bay (Turkey); Pleistocene, south coast of Turkey. Explanation of Plate 7,138 Figs. 1,3,9 LV, (Io 5176, 532 pm long): fig. 1 , int. lat.; fig. 3, muse, sc.; fig. 2, 6 RV, int. lat. (Io 5177, 530 long). Scale A (250 pm \ x 1 26), fig. 1 ; scale B(250/im;x 130), fig. 2; scale C(100,um;x453), fig. 3. t-t— r Stereo-Atlas of Ostracod Shells 7, 136 Callistocy there mediterranea (2 of 4) - I - Stereo-Atlas of Ostracod Shells 7, 138 Callistocy there mediterranea (4 of 4) 1- - : I Stereo-Atlas of Ostracod Shells 7(24) 139 - 142 (1980) 595.337.14 (1 18.213X560:161.036.34) : 551.351 + 552.52 Callistocythere montana (1 of 4) ON CALLISTOCYTHERE MONTANA DORUK sp. nov. by Neriman Doruk (Ege University, Izmir, Turkey) Callistocythere montana sp. nov. Holotype: Brit. Mus. (Nat. Hist.) no. Io 5168, d RV. Type locality: Road cutting 3km S W of Kuzucubelen (Mersin region of Turkey), approx, lat. 36° 48 N, long. 34° 27* E. Tortonian (Middle to Upper Miocene). Grey sandy clay with abundant foraminifera and molluscan shell fragments. Presumed intermediate depth — marine shelf. Derivation of name: Latin “mountainous”, referring to ornamentation. Figured specimens: Brit. Mus. (Nat. Hist.) nos. Io 5168 (d RV: PI. 7, 140, fig. 1 ;P1. 7, 142, figs. 2, 3), Io 5169 (d LV: PI. 7, 140, fig. 2). All figured specimens from the type locality, about 4 metres from the base of the section. Explanation of Plate 7, 140 Fig. 1 , d RV, ext. lat. (holotype, Io 5168, 462 pm long); fig. 2, d LV, ext. lat. (Io 5169, 420 pm long). Scale A (250 pm] x 1 86), fig. 1 ; scale B (250 pm\ x 205), fig. 2. f-r-j-- - + — H — Stereo-Atlas of Ostracod Shells 7,141 Callistocythere montana (3 of 4) Diagnosis: Ornamentation diagnostic ; surface between costae and tubercles smooth. Remarks: Strength of costae and tubercles varies in intensity on the carapace. Sexual dimorphism pronounced; males less high posteriorly, females subrectangular. Ornamentation more strongly marked in males. Distribution: Known, so far, only from the type locality. Explanation of Plate 7, 142 Fig. 1, d LV. int. lat. (specimen lost);figs. 2, 3, d RV, (holotype Io 5168, 462 /jm long); fig. 2, int. lat.; fig. 3, muse. sc. Scale A(250,um;x 169), fig. 1 ; scale B(250ium;x 151), fig. 2; scale C(100//m;x453), fig. 3. Callistocy there montana (4 of 4) Callistocy there montana (2 of 4) Stereo-Atlas of Ostracod Shells 7, 142 Stereo-Atlas of Ostracod Shells 7, 140 -+-»-r- Stereo-Atlas of Ostracod Shells 7 (25) 143 - 146 (1980) 595.337.14 (1 18.213X560:161.036.36) : 551.351 + 552.54 Paracytheridea inscita (1 of 4) ON PARACYTHERIDEA INSCITA DORUK sp. nov. by Neriman Doruk (Ege University, Izmir, Turkey) Paracytheridea inscita sp. nov. Holotype: Brit. Mus. (Nat. Hist.) no. Io 5209, 9 RV. Type locality: Road cutting between Babatorun and Com, 1km S W of Babatorun (Turkey); approx, lat. 36° 04' N, long. 36° 15' E. Upper Miocene: yellow sandstone with abundant foraminifera and mollusc shells; presumed shallow water marine. Derivation of name: Latin, “clumsy”, referring to heavy ornamentation. Figured specimens: Brit. Mus. (Nat. Hist.) nos. Io 5209 (9 RV: PI. 7, 144, figs. 1, 3; PI. 7, 146, figs. 2, 3), Io 5210 ( 6 LV: PI. 7, 144, fig. 2), Io 5211 (d LV: PI. 7, 146, fig. 1). Io 5209 and Io 5211 are from the type locality, 10 metres from the base of the section. Io 5210 is from a stream cutting 200 metres south of Sarili, Turkey, 2 - 3 metres from the base of the section. Tortonian, bioclastic limestone with molluscan shells, presumed shallow water marine. Approx, lat. 36° 07' N, long. 36° 131 E. Explanation of Plate 7, 144 Figs. 1,3,9 RV (holotype, Io 5209, 678 pm long): fig. 1 , ext. lat.; fig. 3, papillate sola; fig. 2, <5 LV, ext. lat. (Io 5210, 673 pm long). Scale A (250 pm; x 115), fig. 1 ; scale B (250 pm; x 113), fig. 2; scale C (50 pm; x 368), fig. 3. Stereo-Atlas of Ostracod Shells 7, 145 Paracytheridea inscita (3 of 4) Diagnosis: Heavily ornamented. Remarks: Similar to P. triquetra (Reuss) but less triangular in lateral outline. Slightly variable in the strength of the ribs. Males a little less high (see PI. 7, 144, fig. 2) than females. Distribution: Upper Miocene ; Antakya region of Turkey. Explanation of Plate 7, 146 Fig. 1 , <5 LV, int. lat. (Io 5211,673 //m long); figs. 2,3,9 RV, (holotype, Io 5209, 678 pm long); fig. 2, int. lat. ; fig. 3, muse. sc. Scale A(250/im;x 101), figs. 1,2; scale B ( 1 00 pm ; x 404), fig. 3. Stereo-Atlas of Ostracod Shells 7, 144 Stereo-Atlas of Ostracod Shells 7, 146 Paracytheridea inscita (4 of 4) Paracytheridea inscita (2 of 4) - Stereo-Atlas of Ostracod Shells 7 (26) 147 - 150 (1980) Paracytheridea hexalpha (1 of 4) 595.337.14 (119.1 + 119.4 + 1 19.9)(560: 161.036.35 + 038.26) : 551.351 ON PARACYTHEREIDEA HEXALPHA DORUK sp. nov. by Neriman Doruk (Ege University, Izmir, Turkey) Paracytheridea hexalpha sp. nov. 1971 Paracytheridea sp. 6, P. J. Barbeito-Gonzalez, Mitt. Hamburg, zool. Mus. Inst., Bd. 67, 305, pi. 30, figs, la, 2a. 1972 Paracytheridea sp. A, H. Uffenorde, Gottinger Arb. Geol. Palaont., 13, 87, pi. 9, fig. 10, pi. 12, fig. 9. Holotype: Brit. Mus. (Nat. Hist.) no. Io 5213, 9 LV. [Paratypes: Brit. Mus. (Nat. Hist.) nos. Io 5212, 5214, 5215] . Type locality: Drillings off south coast of Turkey; approx, lat. 36° 26' N, long. 35° 041 E. Pleistocene. Derivation of name: Greek, six + letter alpha, with reference to synonymy. Explanation of Plate 7, 148 Fig. 1 , $ RV, ext. lat. (paratype, Io 5212, 890 pm long); fig. 2, 9 LV, ext. lat. (holotype, Io 5213, 823 pm long); fig. 3, surface ornament (paratype, Io 5214). Scale A (250 pm; x 90), fig. 1 ; scale B (250 pm; x 96), fig. 2; scale C (1 00 pm; x 282), fig. 3. f •♦—1-4- I — 1- ->--J — -t- Stereo-Atlas of Ostracod Shells 7, 149 Paracytheridea hexalpha (3 of 4) Figured specimens: Brit. Mus. (Nat. Hist.) nos. Io 5212 (9 RV: PI. 7, 148, fig. 1), Io 5213 (holotype, 9 LV: PI. 7, 148, fig. 2; PI. 7, 150, fig. 1), Io 5214 (LV: PI. 7, 148, fig. 3), Io 5215 (d RV: PI. 7, 150, figs. 2, 3). Io 5212 and 5213 from the type locality, depth 450 - 480ft. — presumed shallow marine. Io 5214 and Io 5215 from Urla Bay (west coast of Turkey), abut 30ft. depth. Subrecent, presumed littoral; approx, lat. 38° 19 'N, long. 26° 47 'E. Diagnosis: Remarks: Distribution: Papillate solae with mural ghosts. Close to Paracytheridea bovettensis (Seguenza) but differs by having a weaker reticulation and more attenuated posterior processes. Sexual dimorphism is indicated by the presence of more elongate males. Recent of the Adriatic Sea and Pleistocene to Recent from Turkey. Explanation of Plate 7, 150 Fig. 1 , 9 LV, int. lat. (holotype, Io 5213, 823 pm long); fig. 2, d RV, int. lat. (paratype, Io 5215, 723 pm long); fig. 3, d RV, muse. sc. (paratype, Io 5215). Scale A(250,um;x 90), fig. 1 ; scale B(250/zm;x96), fig. 2; scale C (100 ^m; x 282), fig. 3. Paracytheridea hexalpha (2 of 4) • Stereo-Atlas of Ostracod Shells 7, 148 Stereo-Atlas of Ostracod Shells 7,150 Paracytheridea hexalpha (4 of 41 i + r Stereo-Atlas of Ostracod Shells 7 (27) 151 - 154 (1980) Leptocy there multipunctata (1 of 4) 595.337.14 (118.22 - 119.1 + 1 19.9X560: 16 1 .036.36) : 551.351 ON LEPTOCYTHERE MULTIPUNCTATA (SEGUENZA) by Neriman Doruk (Ege University, Izmir, Turkey ) Leptocy there multipunctata (Seguenza, 1884) 1884 Cy there multipunctata G. Seguenza, II Naturalista Siciliana, 29, pi. 1 , figs. 9a - b. 1950 Leptocythere multipunctata (Seguenza); G. Ruggieri, Giorn. Geol. ser. 2, 21, 52, pi. 1, figs. 8, 15. 1972 Leptocythere multipunctata multipunctata (Seguenza) ; W. Sissingh, Utrecht Micropaleont. Bull., 6, 91, pi. 5, fig. 9. Holotype: Probably lost during the Messina earthquake of 1908 (Ruggieri, Boll. Soc. Paleont., 2, no. 1,3, 1963). Type locality: Rizzola, near Syracusa, Sicily; Calabrian, Quaternary. Figured specimens: Brit. Mus. (Nat. Hist.) nos. Io 5180 (9 RV: PI. 7, 152, fig. 1 ; PI. 7, 154, fig. 2), Io 5181 (d LV: PI. 7, 152, fig. 2; PL 7, 154, figs. 1 , 3). Both are from drillings off Iskenderun Bay, S Turkey at a depth of 610 feet below sea floor, approx, lat. 36° 071 N, long. 36° 13 E; Pliocene — Pleistocene; presumed shallow marine. Diagnosis: Carapace with diagnostic outline ; shell surface irregularly pitted with numerous puncta. Explanation of Plate 7, 152 Fig. 1,9 RV, ext. lat. (Io 5 180, 470 pm long); fig. 2, d LV, ext. lat. (Io 5181, 450 pm long). Scale A (250 pm] x 173), fig. 1 ; scale B (250 ^m; x 188), fig. 2. 4--L4- I H- h- Stereo-Atlas of Ostracod Shells 7, 153 Leptocythere multipunctata (3 of 4) Remarks: Some authors have distinguished 2 subspecies of L. multipunctata on the size of the surface puncta (e.g. Sissingh 1972, op. cit .) but as a certain amount of variation in puncta size is seen in the present material from the same sample, these are here considered to be one species. Sexual dimorphism is only slightly observed in this species with females being slightly higher than the males. Marginal pore canals branching (see text-fig. 1). Distribution: Recent: Adriatic, Porto-Corsini (Ruggieri, 1950, op. cit.). Quaternary: Syracusa, Sicily (Seguenza, 1884, op. cit.)] Imola, Italy (Ruggieri, 1950). Upper Pliocene — Pleistocene: Aegean Islands (Sissingh, 1972, op. cit.) and S Turkey (present paper). Text-fig. 1. Marginal pore canals of L. multipunctata, 9 RV, Io 5180 (x 66). Explanation of Plate 7, 154 Figs. 1,3 , d LV (Io 5181,450/ttm long): fig. 1 , int. lat.; fig. 3, muse, sc.; fig. 2, 9 RV, int. lat. (Io 5180, 470 pm long). Scale A(250Jnm;x 159), fig. 1 ; scale B (250 pm] x 148), fig. 2 ; scale C ( 100 pm ; x 477), fig. 3. Leptocythere multipunctata (2 of 4) Stereo- Atlas of Ostracod Shells 7,152 Stereo-Atlas of Ostracod Shells 7, 1 54 Leptocythere multipunctata (4 of 4) v • A* m . - - I - Stereo-Atlas of Ostracod Shells 7 (28) 155 - 157 (1980) Index, Volume 7, 1980 (1 of 3) General Index Acanthocythereis decoris Siddiqui; 131-134 Athersuch, J., On Aurila woodwardii (Brady); 45 - 52 Athersuch, J., On Loxoconcha pontica Klie; 53-60 Athersuch, J. & Whittaker, J. E., On Callistocy there crispata (Brady); 67 - 72 Athersuch, J. & Whittaker, J. E., On Callistocy there littoralis (Muller); 61-66 audax, Scottia; 37-44 Aurila woodwardii (Brady); 45 - 52 Bate, R. H. & Sheppard, L. M., On Quadraleberis exquisita Bate & Sheppard gen. et sp. nov.; 107-112 Bate, R. H. & Sheppard, L. M., On Xestoleberis postangulata Bate & Sheppard sp. nov.; 101-106 bilobata, Schuleridea; 25 - 28 braderupensis, Pachydomelloides; 77-80 Bulbosclerites unicornis (Neckaja); 73 - 76 Callistocy there crispata (Brady); 67 - 72 Callistocy there littoralis (Muller); 61-66 Callistocy there mediterranea (Muller); 135-138 Callistocy there montana Doruk sp. nov.; 139 - 142 crispata, Callistocy there; 67 - 72 Cyprideis exuberans van Harten sp. nov.; 89-100 Cyprideis undosa van Harten sp. nov.; 81-88 DeDeckker, P., On Scottia audax (Chapman); 37 - 44 decoris, Acanthocythereis; 131 - 134 Disulcina syltensis (Schallreuter); 21-24 Doruk, N., On Callistocythere mediterranea (Muller); 135-138 Doruk, N., On Callistocythere montana Doruk sp. nov.; 139-142 Doruk, N., On Leptocy there multipunctata (Seguenza); 151-154 Doruk, N., On Paracytheridea hexalpha Doruk sp. nov.; 147 - 150 Doruk, N., On Paracytheridea inscita Doruk sp. nov.; 143 - 146 Eographiodacty lus sulcatus Schallreuter; 1 - 8 exquisita, Quadraleberis; 107 - 112 exuberans, Cyprideis, 89- 100 Foramenella parkis (Neckaja); 17-20 Fuller, N., On Procytheropteron prolongatum (Sharapova); 1 17 - 124 Harten, D. van, On Cyprideis exuberans van Harten sp. nov.; 89 - 100 Harten, D. van, On Cyprideis undosa van Harten sp. nov.; 81-88 hexalpha, Paracytheridea; 147 - 150 Horne, D. J. & Whittaker, J. E., On Semicytherura tela Horne & Whittaker sp. nov.; 1 25 - 130 inscita, Paracytheridea; 143 - 146 Klimphores planus Schallreuter; 9-16 Leptocythere multipunctata (Seguenza); 151 - 154 littoralis, Callistocythere; 61-66 Loxoconcha pontica Klie; 53-60 mediterranea, Callistocythere; 135 - 138 Micropneumatocy there tumida Stephens & Ware sp. nov.; 1 13 - 116 montana, Callistocythere; 139 - 142 multipunctata, Leptocythere; 151 - 154 Neale, J. W., On Paranotacy there speetonensis (Neale); 33 - 36 Neale, J. W., On Schuleridea bilobata (Triebel); 25 - 28 Neale, J. W., On Schuleridea rhomboidalis Neale; 29-32 Pachydomelloides braderupensis Schallreuter sp. nov.; 77 - 80 Paracytheridea hexalpha Doruk sp. nov.; 147 - 150 Paracytheridea inscita Doruk sp. nov.; 143-146 Paranotacy there speetonensis (Neale); 33 - 36 Stereo-Atlas of Ostracod Shells 7,156 Index, Volume 7, (2 of 3) parkis, Foramenella; 17-20 planus, Klimphores; 9-16 pontica, Loxoconcha; 53 - 60 postangulata, Xestoleberis; 101 - 106 Procytheropteron prolongatum (Sharapova); 117 - 124 prolongatum, Procytheropteron; 1 17 - 124 Quadraleberis exquisita Bate & Sheppard gen. et sp. nov.; 107 - 112 rhomboidalis, Schuleridea; 29-32 Schallreuter, R. E. L., On Bulbosclerites unicornis (Neckaja); 73 - 76 Schallreuter, R. E. L., On Disulcina syltensis Schallreuter sp. nov.; 21-24 Schallreuter, R. E. L., On Eographiodactylus sulcatus Schallreuter; 1 - 8 Schallreuter, R. E. L., On Foramenella parkis (Neckaja); 17-20 Schallreuter, R. E. L., On Klimphores planus Schallreuter; 9 - 16 Schallreuter, R. E. L., On Pachydomelloides braderupensis Schallreuter sp. nov.; 77 - 80 Schuleridea bilobata (Triebel); 25 - 28 Schuleridea rhomboidalis Neale; 29 - 32 Scottia audax (Chapman); 37-44 Semicytherura tela Horne & Whittaker sp. nov.; 125-130 Sheppard, L. M. & Bate, R. H., On Quadraleberis exquisita Bate & Sheppard gen. et sp. nov.; 107-112 Sheppard, L. M. & Bate, R. H., On Xestoleberis postangulata Bate & Sheppard sp. nov.; 101 - 106 Siddiqui, Q. A., On Acanthocythereis decoris Siddiqui; 131-134 speetonensis, Paranotacy there; 33 - 36 Stephens, J. & Ware, N., On Micropneumatocy there tumida Stephens & Ware sp. nov.; 113-116 sulcatus, Eographiodactylus; 1 - 8 syltensis, Disulcina ; 21-24 tela, Semicytherura; 125-130 tumida, Micropneumatocy there; 1 13 - 116 undosa, Cyprideis; 81-88 unicornis, Bulbosclerites; 73 - 76 Ware, M. & Stephens, J., On Micropneumatocy there tumida Stephens & Ware sp. nov.; 1 13 - 116 Whittaker, J. E. & Athersuch, J., On Callistocy there crispata (Brady); 61 -12 Whittaker, J. E. & Athersuch, J., On Callistocy there littoralis (Muller); 61-66 Whittaker, J. E. & Home, D. J., On Semicytherura tela Horne & Whittaker sp. nov.; 125 - 130 woodwardii, Aurila; 45-52 Xestoleberis postangulata Bate & Sheppard sp. nov.; 101 - 106 See 1 (2) 5 - 22 (1973) for explanation of the Schedules in the Universal Decimal Classification Index; Geological Horizon (113.31) Ordovician: Foramenella parkis; 17-22 (116.311) Berriasian: Paranotacy there speetonensis; 33 - 36 (113.312) Middle Ordovician: Klimphores planus; 9-16 (116.312) Aptian: Schuleridea bilobata; IS - 28 Schuleridea rhomboidalis; 29-32 (113.313) Upper Ordovician: Bulbosclerites unicornis; 73 - 76 Disulcina syltensis; 21-24 Eographiodactylus sulcatus; 1 - 8 (118.14) Eocene: Acanthocythereis decoris; 131 - 134 (118.21) Miocene: (116.222) Bathonian: Micropneumatocy there tumida; 113-116 Cyprideis exuberans; 89 - 100 Cyprideis undosa; 81-88 (116.223) Volgian; Procytheropteron prolongatum; 117-124 (118.213) Tortonian: Callistocy there montana; 139 - 142 Paracytheridea inscita; 143 - 146 Stereo-Atlas of Ostracod Shells 7, 157 Index, Volume 7, (3 of 3) (118.22) Pliocene: (119.4) Holocene: Callistocy there mediterranea; 135-138 Cyprideis exuberans; 89 - 100 Paracytheridea hexalpha; 147 - 150 Leptocythere multipunctata; 151 - 154 (119.9) Recent: Callistocy there crispata; 67-72 (119) Quaternary: Callistocy there littoralis; 61-66 Aurila woodwardii; 45-52 Callistocy there mediterranea; 135-138 Loxoconcha pontica; 53 - 60 Leptocythere multipunctata; 151 - 154 Paracytheridea hexalpha; 147 - 150 (119.1) Pleistocene: Quadraleberis exquisita; 107-112 Leptocythere multipunctata; 151-154 Scottia audax; 37 - 44 Paracytheridea hexalpha; 147 - 150 Semicytherura tela; 125-130 Xestoleberis postangulata; 101 - 106 Index; Geographical Location See 1 (2) 5 - 22 (1973) for explanation of the Schedules in the Universal Decimal Classification (261.2) NE Atlantic: (46) Spain: Callistocy there crispata; 67-72 Cyprideis exuberans; 89 - 100 Callistocy there littoralis; 61-66 Cyprideis undosa; 81-88 Semicytherura tela; 125 - 130 (47) U.S.S.R.: (262) Mediterranean Sea: Procytheropteron prolongatum; 117 - 124 Aurila woodwardii; 45-52 Loxoconcha pontica; *>3 - 60 (486) Gotland: Eographiodactylus sulcatus; 1-8 (267.8) Persian Gulf: Foramenella parkis; 17-20 Quadraleberis exquisita; 107 - 112 Xestoleberis postangulata; 101 - 106 (489) Denmark: Schuleridea bilobata; 25 - 28 (420) England: Micropneumatocy there tumida; 1 13 - 116 (492) Netherlands: Bulbosclerites unicornis; 73 - 76 (427.4) Yorkshire: Disulcina syltensis; 21-24 Paranotacy there speetonensis; 33 - 36 Eographiodactylus sulcatus; 1 - 8 Schuleridea bilobata; 25 - 28 Foramenella parkis; 17-29 Schuleridea rhomboidalis; 29-32 Pachydomelloides braderupensis; 77-80 (430.1) Federal Republic of Germany: (549) Pakistan: Schuleridea bilobata; 25 - 28 Acanthocythereis decoris; 1 13 - 116 Schuleridea rhomboidalis; 29-32 (560) Turkey (Asia): (430.2) German Democratic Republic: Callistocy there mediterranea; 135-138 Klimphores planus; 9-16 Callistocy there montana; 139 - 142 Leptocythere multipunctata; 151-154 (45) Italy: Paracytheridea hexalpha; 147 - 150 Callistocy there mediterranea; 135 - 138 Paracytheridea inscita; 143-146 (931) New Zealand: Scottia audax; 37-44 A Stereo -Atlas of Ostracod Shells edited by R.H. Bate, J. W. Neale, Lesley M. Sheppard and David J. Siveter Volume 7, 1980 Parti ( pp. 1-72); 27th June, 1980 Part 2 (pp.73-157); 19th December, 1980 Published by The British Micropalaeontological Society in association with Robertson Research International Ltd., Llandudno, Wales Stereo-Atlas of Ostracod Shells 7, ii Contents Contents 1 On Eographiodactylus sulcatus Schallreuter;by R. E. L. Schallreuter 1 2 On Klimphores planus Schallreuter; by R. E. L. Schallreuter 9 3 On Foramenella parkis (Neckaja); by R. E. L. Schallreuter 17 4 On Disulcina syltensis Schallreuter sp. nov.; by R. E. L. Schallreuter 21 5 On Schuleridea bilobata (Triebel); by J. W. Neale 25 6 On Schuleridea rhomboidalis Neale ; by J. W. Neale 29 7 On Paranotacy there speetonensis (Neale); by J. W. Neale 33 8 On Scottia audax (Chapman); by P. De Deckker 37 9 On Aurila woodwardii (Brady); by J. Athersuch 45 10 On Loxoconcha pontica Klie; by J. Athersuch 53 1 1 On Callistocy there littoralis (Muller); by J. Athersuch & J. E. Whittaker 61 12 On Callistocy there crispata (Brady); by J. Athersuch & J. E. Whittaker 67 13 On Bulbosclerites unicornis (Neckaja); by R. E. L. Schallreuter 73 14 On Pachydomelloides braderupensis Schallreuter sp. nov.; by R. E. L. Schallreuter 77 15 On Cyprideis undosa van Harten sp. nov.; by D. van Harten 81 16 On Cyprideis exuberans van Harten sp. nov.; by D. van Harten 89 17 On Xestoleberis postangulata Bate & Sheppard sp. nov.; by R. H. Bate & L. M. Sheppard 101 18 On Quadraleberis exquisita Bate & Sheppard gen. et sp. nov.; by R. H. Bate & L. M. Sheppard 107 19 On Micropneumatocy there tumida Stephens & Ware sp. nov.; by J. Stephens & M. Ware 113 20 On Procytheropteron prolongatum (Sharapova); by N. Fuller 117 21 On Semicytherura tela Horne & Whittaker sp. nov.; by D. J. Horne & J. E. Whittaker 125 22 On Acanthocythereis decoris Siddiqui; by Q. A. Siddiqui 131 23 On Callistocy there mediterranea (Muller); by N. Doruk 135 24 On Callistocy there montana Doruk sp. nov.; by N. Doruk 139 25 On Paracytheridea inscita Doruk sp. nov.; by N. Doruk 143 26 On Paracytheridea hexalpha Doruk sp. nov.; by N. Doruk 147 27 On Leptocy there multipunctata (Seguenza);by N. Doruk 151 28 Index for Volume 7, 1980 155 A stratigraphical index of British Ostracoda The first of a series of Occasional Papers of the British Micropalaeontological Society. ISBN 0 902354 08 6 Edited by Raymond H. Bate and Eric Robinson Geological Journal Special Issue No. 8 Developed from ostracod specialist meetings of the British Micropalaeontological Society this book aims to illustrate the stratigraphical I y important index ostracods of Britain. Brief descriptions of the ostracods, together with palaeogeographic maps, range tables, discussions on present knowledge and on faunal associations make this a valuable book for both student and professional micropalaeontologist. Introductory chapters on the biography of past ostracod workers and on ostracod morphology add to the book's value as a reference work. 500 pp Contents Editorial Preface History of ostracod studies Ostracod morphology The Ordovician The Silurian The Devonian The Carboniferous The Permian The Trias The Jurassic Pt I — Pliensbachian to Toarcian The Jurassic Pt II — Aalenian to Bathonian The Jurassic Pt III — Callovian to Portlandian The Purbeck/Wealden The Cretaceous The Tertiary — Palaeogene The Pleistocene Eric Robinson Raymond H. Bate and Eric Robinson David Si veter David Si veter Andrew Gooday Eric Robinson Eric Robinson Raymond H. Bate Alan Lord Raymond H. Bate Tom Kiienyi Tom Kiienyi and John W. Neale John l/V. Neale Mike Keen Eric Robinson Ostracod range tables Index Published 1978 commercial application Lesley M. Sheppard Price, including postage, £40.00 (U.S. $112.90) Available to members of the British Micropalaeontological Society at the listed price less 25%. (Attn. John Wilson), John Wiley and Sons Ltd., Baffins Lane, Chichester, Sussex P019 1UD, England. EKHull Microslide Company 24 Lynmouth Gardens Perivale, Middlesex UB6 7HR England Telephone 01 - 998 2256 Cardboard slides in aluminium holders Glass or thick, clear, acetate coverslides. Single, 4-celled or faunal (32 or 64 cell divisions) Plastic slides Single, double, 3 or 4-celled and faunal (32 or 64 cell divisions) All slides sold complete at 20 pence each (USA 47 cents) For air-freight, sold without glass coverslides at 19 pence (USA 45 cents) Postage and packing extra Stereo -Atlas of Ostracod. Shells: Vol.7, Part 2 CONTENTS 7 (13) 73 - 76 On Bulbosclerites unicornis (Neckaja); by R. E. L. Schallreuter (£1 .40) 7 (14) 77 - 80 On Pachydomelloid.es braderupensis Schallreuter sp. nov.; by R. E. L. Schallreuter (£1 .40) 7 (15) 81 - 88 On Cyprideis undosa van Harten sp. nov.;by D. van Harten (£2.80) 7 (16) 89 - 100 On Cyprideis exuberans van Harten sp. nov.;by D. van Harten (£4.20) 7 (17) 101 - 106 On Xestoleberis postangulata Bate & Sheppard sp. nov.;by R. H. Bate & L. M. Sheppard (£2.10) 7 (18) 107 - 1 12 On Quadraleberis exquisita Bate & Sheppard gen. et sp. nov.; by R. H. Bate & L. M. Sheppard (£2.10) 7 (19) 1 1 3 - 1 1 6 On Micropneumatocy there tumida Stephens & Ware sp. nov.; by J. Stephens & M. Ware (£1 .40) 7 (20) 1 17 - 124 On Procytheropteron prolongatum (Sharapova); by N. Fuller (£2.80) 7 (21) 125 - 130 On Semicytherura tela Horne & Whittaker sp. nov.;by D. J. Horne & J. E. Whittaker (£2.10) 7 (22) 131 - 134 On Acanthocythereis decoris Siddiqui;by Q. A. Siddiqui (£1 .40) 7 (23) 135 - 138 On Callistocy there mediterranea (Muller); by N. Doruk (£1 .40) 7 (24) 139-142 On Callistocy there montana Doruk sp. nov.; by N. Doruk ' (£1.40) 7 (25) 143 - 146 On Paracytheridea inscita Doruk sp. nov.; by N. Doruk (£1 .40) 7 (26) 147 - 150 On Paracytheridea hexalpha Doruk sp. nov.; by N. Doruk (£1 .40) 7 (27) 151 - 154 On Leptocy there multipunctata (Seguenza); by N. Doruk (£IAQX 7 (28) 155 - 157 Index for Volume 7, 1980 j(«£60) Prepaid annual subscription (valid for Volume 8, 1981) Individual subscription £20.00 or US $ 50.00 for 2 parts (post free) Price per Part: £20.00 or US $ 50.00 Institutional subscription £30.00 or US S 75.00 for 2 parts (post free) Price per Part: £30.00 or US $ 75.00 Back volumes: Vol. 1 (4 Parts): £20.00; price per Part: £5 .00 Vol. 2 (4 Parts): £28.00; price per Part: £7.00 Vol. 3 (2 Parts: £24.00; price per Part: £12.00 Vol. 4 (2 Parts): £30.00; price per Part: £15.00 Vol. 5 (2 Parts): £32.00; price per Part: £16.00 Vol. 6 (2 Parts): £40.00; price per Part: £20.00 Vol. 7 (2 Parts): £40.00; price per Part: £20.00 Prices of Numbers as shown in Lists of Contents for each Part Postage extra in sales of all back Numbers and back Parts No trade discount is allowed on the subscription rate Orders should be addressed to: Dr. C. W. 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