A Stereo -Atlas of Ostracod Shells
edited by J. Athersuch, D. J. Horne, J. W. Neale,
and David J. Siveter
Volume 15, Part 2; 31st December, 1988
Published by the British Micropalaeontological Society, London
Editors
Dr J. Athersuch, Stratigraphy Branch, The British Petroleum Co, BP Research Centre, Chertsey Road. Sunbury-on-Thames, Middlesex TW16 7LN.
Dr D. J. Horne, Department of Geology, City of London Polytechnic, Walburgh House, Bigland Street, London El 2NG.
Prof. J.W. Neale, Department of Geology, The University, Hull HU6 7RH.
Dr David J. Siveter, Department of Geology, The University, Leicester LEI 7RH.
Editorial Board
Dr J.-P. Colin, Esso Production Research - European, 213 Cours Victor Hugo, 33321 Begles, France. Dr P. De Deckker, Department of Geography, Monash University, Clayton, Victoria, Australia 3168. Dr D. van Harten, Universiteit van Amsterdam, Geologisch Instituut, Nieuwe Prinsengracht 130, Amsterdam, The Netherlands.
Dr R.E.L. Schallreuter, Universitat Hamburg, Geologisch-Palaontologisches Institut, Bundesstrasse 55, D 2000 Hamburg 13, West Germany.
Dr Zhao Yuhong, Nanjing Institute of Geology & Palaeontology, Academia Sinica, Chi-Ming-Ssu. Nanjing, People’s Republic of China.
Officers of the British Micropalaeontological Society
Chairman Dr A.C. Higgins, BP Research Centre, Chertsey Road, Sunbury-on-Thames, Middlesex TW16 7LN.
Secretary Dr P.P.E. Weaver, Institute of Oceanographic Sciences (DL), Brook Road, Wormley, Godaiming, Surrey GU8 5UB.
Treasurer Dr J.E. Whittaker, Department of Palaeontology, British Museum (Natural History), Cromwell Road, London SW7 5BD.
Journal Editor Dr. M. Keen, Department of Geology, The University of Glasgow G12 8QQ.
Newsletter Editor Dr D. J. Shipp, Robertson Research International, Ty'n-y-Coed. Llanrhos, Llandudno, Gwynedd LL30 ISA.
Conodont Group Chairman Dr P. M. Smith, Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ.
Conodont Group Secretary Mr A. Swift, Geology Department, University of Nottingham NG7 2RD.
Foraminifera Group Chairman Dr A. A. H. Wonders, B.P. Research Centre, Chertsey Road, Sunbury-on-Thames, Middlesex TW16 7LN.
Foraminifera Group Secretary Dr D.J. Shipp, Robertson Research International, Ty'n-y-Coed, Llanrhos, Llandudno, Gwynedd LL30 ISA.
Microplankton Group Chairman Dr G.L. Eaton, B.P. Research Centre, Chertsey Road, Sunbury-on- Thames, Middlesex TW16 7LN.
Microplankton Group Secretary Dr A.J. Powell, B.P. Research Centre, Chertsey Road, Sunbury-on- Thames, Middlesex TW16 7LN.
Ostracod Group Chairman Dr D.J. Horne, Geology Department, City of London Polytechnic, Walburgh House, Bigland Street, London El 2NG.
Ostracod Group Secretary Dr N. G. Fuller, Phillips Petroleum Company United Kingdom Limited, Petroleum Products Division, Phillips Quadrant, 35 Guildford Road, Woking, Surrey GU22 7QT.
Palynology Group Chairman Dr M. C. Boulter, Palynology Research Unit, N.E. London Polytechnic, Romford Road, London E15 4LZ.
Palynology Group Secretary Dr J. E. A. Marshall, Department of Geology, The University, Southampton S09 5NH.
Calcareous Nannofossil Group Chairman Mr M. Jakubowski, Robertson Research International, Ty’n-y-Coed, Llanrhos, Llandudno, Gwynedd LL30 ISA.
Calcareous Nannofossil Group Secretary Dr J. Crux, B.P. Research Centre, Chertsey Road, Sunbury-on-Thames, Middlesex TW16 7LN.
Instructions to Authors
Contributions illustrated by scanning electron micrographs of Ostracoda in stereo-pairs are invited. Format should follow the style set by the 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 of Semicytherura striata (Sars) from intertidal algae collected at Blue Anchor, Somerset SW England. Photograph by Dr J. E. Whittaker, British Museum (Natural History), London.
Printed in the UK by BPCC Northern Printers Ltd., Stanley Road. Blackpool FY1 4QN
Member of BPCC pic
A Stereo-Atlas of Ostracod Shells
edited by J. Athersuch, D. J. Horne, J. W. Neale
and David J. Siveter
Volume 15, 1988
Part 1 (pp.1-72); 30th May, 1988 Part 2 (pp. 73-148); 31st December, 1988
Published by the British Micropalaeontological Society, London
Stereo-Atlas of Ostraeod Shells 15, ii
Contents
Contents
1 On Loxoconcha praepontica praepontica Maybury & Whatley subsp. nov. ; by C. A. Maybury &
R. C. Whatley 1
2 On Loxoconcha praepontica magna Maybury & Whatley subsp. nov.; by C. A. Maybury &
R. C. Whatley 5
3 On Loxoconcha pararhomboidea Whatley & Maybury sp. nov.; by R. C. Whatley & C. A. Maybury 9
4 On Palmoconcha hornei Maybury & Whatley sp. nov.; by C. A. Maybury & R. C. Whatley 13
5 On Webbvlla cyma Schallreuter & Siveter gen. et sp. nov.; by R. E. L. Schallreuter & D. J. Siveter 17
6 On Webbylla reticulata Schallreuter & Siveter sp. nov.; by R. E. L. Schallreuter & D. J. Siveter 21
7 On Pilla piformis Schallreuter & Siveter gen. et sp. nov.; by R. E. L. Schallreuter & D. J. Siveter 25
8 On Tricornia (Bohemia) paragracilis (Blumenstengel) ; by G. Becker 29
9 On Bradleya normani (Brady); by D. W. Foster & R. L. Kaesler 33
10 On Reticulocosta ornatoreticulata (Reyment); by R. Reyment 37
11 On Quadracythere keeni Slipper sp. nov.; by I. J. Slipper 41
12 On Quadracythere nodosa Haskins; by D. J. Horne & I. J. Slipper 45
13 On Trimiriasevia uptoni Tirnberlake sp. nov.; by S. Timberlake 49
14 On Timiriasevia triangularis Timberlake sp. nov.; by S. Timberlake 57
15 On Amphiexophthalmocythere oertlii (Babinot); by J. F. Bainot & J. P. Colin 69
16 On Elofsonia papillata Whatley & Maybury sp. nov.; by R. C. Whatley & C. A. Maybury 73
17 On Elofsonia praepusilla Maybury & Whatley sp. nov.; by C. A. Maybury & R. C. Whatley
18 On Loxococha athersuchi Whatley & Maybury sp. nov.; R. C. Whatley & C. A. Maybury 81
19 On Ektyphocythere quadrata Boomer & Lord sp. nov.; by I. Boomer & A. Lord 85
20 On Ektyphocythere lanceolata Boomer sp. nov.; by I. Boomer 89
21 On Ektyphocythere anterocosta Boomer sp. nov.; by 1. Boomer 93
22 On Romecytheridea tenuisculpta (Rome); by K. Wouters 97
23 On Romecytheridea ampla Wouters sp. nov.; by K. Wouters 101
24 On Anisocyamus elegans (Harris); by D. J. Siveter & M. Williams 107
25 On Anisocyamus bassleri (Harris); by D. J. Siveter & M. Williams 115
26 On Leptocythere psammophila Guillaume, 1976; by M. C. Guillaume 123
27 On Cytheropteron latissimum (Norman); by D. J. Horne & J. E. Whittaker 127
28 On Buntonia brunensis Riha sp. nov.; by J. Riha 133
29 On Jaanussonia unicerata Schallreuter, 1971; by J. M. C. Vannier 137
30 On Hemicytherura tricarinata Hanai; by D. J. Horne & 1. Okubo 143
31 Index for Volume 15, 1988 147
Stereo-Atlas of Ostracod Shells 15 (16) 73-76 ( 1988) Elofsonia papillata (1 of 4)
595.337.14 (118.22) (420 : 162.006.50) : 551.35 + 552.51 + 552.52
ON ELOFSONIA PAPILLATA WHATLEY & MAYBURY sp. nov.
by Robin Whatley & Caroline Maybury (University College of Wales, Aberystwyth)
Elofsonia papillata sp. nov.
Holotype:
Type locality:
Derivation of name: Figured specimens:
British Museum (Nat. Hist.) no. OS 12888; 9 LV.
[Paratypes: British Museum (Nat. Hist.) nos. OS 12889-OS 12891],
Blue Clay, sample no. 25, Vicarage Pit, St. Erth. Cornwall. England (Nat. Grid Ref. SW 556352); Upper Pliocene.
Latin, referring to the papillate micro-ornament of the valves.
British Museum (Nat. Hist.) nos. OS 12888 (holotype, 9 LV; PI. 15. 74, fig. 1). OS 12889 (paratype, 9 RV: PI. 15, 74, fig. 2; PI. 15. 76, fig. 4), OS 12890 (paratvpe. cf LV; PI. 15. 74. fig. 3), OS 12891 (paratype, C f LV: PI. 15, 76. figs. 1-3). Paratypes OS 12889, OS 12890 and OS 12891 from the type locality and type horizon, sample nos. 2. 28 and 27 respectively (see C. Maybury, Taxonomy, Palaeoecology and Biostratigraphy of Pliocene Benthonic Ostracoda from St. Erth and North West France, unpub! PhD thesis, Univ. Wales, 1, 3-6. 1985 for sample details).
Explanation of Plate 15. 74
Fig. 1 , 9 LV, ext. lat. (holotype, OS 12888, 490 pm long); fig. 2. 9 RV, ext. lat. (paratype. OS 12889, 460pm long): fig. 3, cf LV. ext.
lat. (paratype, OS 12890, 480 pm long).
Scale A (100 /urn; x 128), figs. 1-3.
Stereo-Atlas of Ostracod Shells 15. 75 Elofsonia papillata (3 of 4)
Diagnosis: A small to medium, subelliptical, posteroventrally compressed species of Elofsonia with a very
delicate micropapillate ornament of pentagonal and hexagonal units and a subelliptical eye spot. A distinct keel-like rim occurs posteroventrally. Sieve-type normal pores commonly fringed bv a circle of papillae. Hinge simple, comprising a smooth bar with indistinct posterior socket in the left valve. There is no distinct anterior terminal element, although the dorsal surface of the median bar of the left valve is weakly denticulate anteriorly. Right valve hinge complementary.
Remarks: In common with E. papillata, E. baltica (Hirschmann, 1909) Meddn Soc. Fauna Flora fenn. , 35.
294, figs. 11-12; see also J. E. Whittaker, Stereo-Atlas Ostracod Shells , 1. 193-200. 1973) possesses sieve-type normal pores occasionally surrounded by papillae; Elofsonia pusilla (Brady & Robertson, 1870) (Ann Mag. nat. Hist., 6(4), 23. pi. 8. figs. 1-3. 1870; see also J. E. Whittaker, Stereo-Atlas Ostracod Shells, 1, 201-204. 1973) possesses a papillate ornament similar to that of the new species. E. papillata, however, is quite distinct from these two species with respect to its shape and outline: it is less tapered anteriorly and posteriorly and shows marked lateral compression posteroventrally, where a broad marginal rim is developed (this rim is absent in E. pusilla and E. baltica). A weakly developed anterior terminal hinge element is present in the other two species; but there is no clearly defined anterior terminal element in E. papillata, except for faint crenulations on the dorsal surface of the anterior end of the hinge groove/bar. In all specimens of E. papillata examined by the authors, the muscle scars were difficult to observe, so that no direct comparison could be made between those of this species and those of previously described Elofsonia.
Distribution : In addition to its occurrence in the Upper Pliocene deposits of St. Erth, England (sample nos. 2, 7,
10, 23, 25. 27-29; see C. Maybury op. cit. for sample details), E. papillata has been recovered from the French Redonian (Upper Pliocene) deposits of Apigne (Le Temple du Cerisier), Beugnon (sample no. 2) and L'Orchere Pincourt (see J.-P. Margerel. Ees Foraminiferes du Redonien. Systematique, Repartition stratigraphique, Paleoecologie, Nantes. 1, 8-26, 1986 for sample details).
Explanation of Plate 15. 76
Figs. 1-3, cf LV (paratype, OS 12891, 450pm long): fig. 1. int. lat.; fig. 2, ant. hinge element: fig. 3, post, hinge element: fig. 4. 9 RV, ornament of lateral surface (paratype, OS 12889, 460pm long).
Scale A (100pm; x 128), fig. 1: scale B (40pm; x283). figs. 2, 3; scale C (10pm; x590), fig. 4.
Stereo- Atlas of Ostracod Shells 15, 74
Elofsonia papillata (2 of 4)
Stereo-Atlas of Ostracod Shells 15(17) 77-80 ( 1988) Elof sonia praepusilla (1 of 4)
595.337.14 (118.22) (420 : 162.006.50 + 44 : 162.002.49) : 551.35 + 552.51 + 552.52
ON ELOFSONIA PRAEPUSILLA MAYBURY & WHATLEY sp. nov.
by Caroline Maybury & Robin Whatley ( University College of Wales , Aberystwyth)
Holotype: Type locality: Derivation of name:
Figured specimens:
Elof sonia praepusilla sp. nov.
British Museum (Nat. Hist.) no. OS 12892; 9 RV.
[Paratypes: British Museum (Nat. Hist.) nos. OS 12893-OS 12895].
Brown Clay, sample no. 29, Vicarage Pit, St. Erth. Cornwall, England (Nat. Grid Ref. SW 556352); Upper Pliocene.
Latin, referring to the close similarity and possible ancestral relationship of the new species to the Pleistocene to Recent species: Elofsonia pusilla (Brady & Robertson, 1870) Ann. Mag. nat. Hist., 6(4), 23, pi. 8, figs. 1-3, 1870).
British Museum (Nat. Hist.) nos. OS 12892 (holotype, 9 RV: PI. 15, 78, fig. 1), OS 12893 (paratype, cf LV: PI. 15, 78, fig. 2; PI. 15. 80, fig. 2). OS 12894 (paratype, cf RV: PI. 15, 80, fig. 1 ), OS 12895 (paratype, 9 RV: PI. 15, 78. fig. 3; PI. 15, 80, figs. 3-4). Specimen OS 12895 is from sample no. 10 at the same locality and horizon as the holotype (see C. Maybury. Taxonomy, Palaeoecology and Biostratigraphy of Pliocene Benthonic Ostracoda from St. Erth and North West France, unpubl. PhD thesis, Univ. Wales, 1, 3-6, 1985 for sample details) and specimens OS 12893 and OS 12894 are both from a sample of light grey, fine to medium grained sand from Le Bosq d’Aubigny (approx, lat. 49° 07'N, long. 1° 05'W). NW France; Upper Pliocene. Redonian (see J.-P. Margerel, Les Foraminiferes du Redonien. Systematique, Repartition stratigraphique, Paleoecologie, Nantes, 1, 8-26, 1968 for geographical and stratigraphical details).
Explanation of Plate 15, 78
Fig. 1 , 9 RV, ext. lat. (holotype, OS 12892, 440 /xm long); fig. 2, cf LV, ext. lat. (paratype. OS 12893, 520 yum long): fig. 3, 9 RV, int.
lat. (paratype, OS 12895, 460/xm long).
Scale A (100/xm; x 129), figs. 1-3.
Stereo-Atlas of Ostracod Shells 15, 79 Elofsonia praepusilla (3 of 4)
Diagnosis: A small to medium, subelliptical to subrectangular, punctate and micropapillate species of
Elofsonia with a weakly developed alar projection midventrally. Sexual dimorphism very strongly developed with males very much longer than females.
Remarks: This species closely resembles Elofsonia pusilla (see J. E. Whittaker, Stereo-Atlas Ostracod Shells,
I, 201-204, 1973) in shape and outline, although the alar protuberance of E. praepusilla is more prominent and overall the valves of the present species are less tumid. Both E. pusilla and E. praepusilla possess a punctate and micropapillate ornament; but whereas the punctate component of the ornament dominates in the latter species, it is subordinate in the former. The most striking difference between the two species is the strong degree of carapace dimorphism exhibited by E. praepusilla. Both males and females of E. pusilla are elongate, whereas the females of E. praepusilla are much less elongate in relation to the male. Precocious sexual dimorphism is also evident in the A-l and A-2 instars of the present species.
E. praepusilla differs from E. papillata Whatley & Maybury, 1988 (Stereo-Atlas Ostracod Shells, 15, 73-76), the only other recorded Pliocene species of Elofsonia, in its more elongate carapace and punctate ornament.
Distribution: This species has been recovered from the Upper Pliocene deposits of St. Erth, Cornwall, England
(sample nos. 1-3, 7, 10, 16, 18, 23, 26-29) and the Upper Pliocene (Redonian) deposits of Beugnon (sample no. 2), L'Orchere Pincourt, Le Bosq d'Aubigny and a mixed sample, NW France. See C. Maybury (op. cit.) and J.-P. Margerel (op. cit.) for details of the British and French samples respectively.
Explanation of Plate 15, 80
Fig. 1, cf RV, ext. lat. (paratype, OS 12894, 530 /xm long); fig. 2, cf LV, int. lat. (paratype, OS 12893, 520 /xm long); figs. 3. 4, 9 RV (paratype, OS 12895, 460/xm long): fig. 3, ant. hinge element; fig. 4, post, hinge element.
Scale A (100/xm; X 129), figs. 1, 2; scale B (50/xm; x223), figs. 3, 4.
Elof sonia praepusilla (2 of 4)
Stereo- Atlas of Ostracod Shells 15, 78
Stereo- Atlas of Ostracod Shells 15, 80
Elofsonia praepusilla (4 of 4)
Stereo-Atlas of Ostracod Shells 15 ( 18) 81-84 ( 1988) Loxoconcha athersuchi (1 of 4)
595.337.14 (118.22) (420 : 162.006.50 + 44:162.002.48) : 551.35 + 552.51 + 552.52
ON LOXOCONCHA ATHERSUCHI WHATLEY & MAYBURY sp. nov.
by Robin Whatley & Caroline Maybury (University College of Wales, Aberystwyth)
Loxoconcha athersuchi sp. nov.
British Museum (Nat. Hist.) no. OS 12882; 9 RV.
[Paratypes: British Museum (Nat. Hist.) nos. OS 12883-OS 12887],
Fine glauconitic, grey sand between 26. 7-32. 4m, Apigne (Borehole II), SW of Rennes (approx, lat. 48° 07'N, long. 1° 41'W), NW France; Redonian, Upper Pliocene.
In honour of Dr John Athersuch in recognition of his important work on the Loxoconchidae. British Museum (Nat. Hist.) nos. OS 12882 (holotype, 9 RV: PI. 15, 82, fig. 1), OS 12883 (paratype, cf LV: PI. 15, 82, fig. 2), OS 12884 (paratype, cf RV: PI. 15, 82, fig. 3), OS 12885 (paratype, 9 LV: PI. 15, 84, fig. 1), OS 12886 (paratype, 9 RV: PI. 15, 84. fig. 2), OS 12887 (paratype, cf RV: PI. 15, 84, fig. 3). Paratypes OS 12883-OS 12884 are from the same sample as the holotype; paratypes OS 12886-OS 12887 are from a bulk sample (sample no. 1), Vicarage Pit. St. Erth, Cornwall, England (Nat. Grid. Ref. SW 556352); Upper Pliocene.
Explanation of Plate 15. 82
Fig. 1, 9 RV, ext. lat. (holotype. OS 12882, 630 fim long); fig. 2, C f LV, ext. lat. (paratype. OS 12883, 750/um long): fig. 3, cf RV.
ext. lat. (paratype, OS 12884, 720^m long).
Scale A (200 gm; X86), figs. 1-3.
Stereo- Atlas of Ostracod Shells 15, 83 Loxoconcha athersuchi (3 of 4)
Diagnosis: A medium to large, subovate (9) to subrectangular (cf) species of Loxoconcha, coarsely punctate
medianly and reticulate peripherally with distinct radiate muri anteriorly. Free marginal rim broad, except orally and with an ornament of weakly developed muri with micropunctate sola. Internal details typical of the genus.
Remarks: This species is similar in carapace morphology to Loxoconcha linleyi Horne, 1982 (Stereo-Atlas
Ostracod Shells, 9, 33-40). but whereas L. athersuchi possesses a coarsely punctate ornament medianly, L. linleyi is finely pitted. The reticulate component of the ornament of the present species is also more strongly developed and male specimens are both absolutely and relatively more elongate.
L. athersuchi is an abundant component of the ostracod fauna from the two French localities in the Apigne region listed below; but only ten valves have been recovered from the single British locality, St. Erth and these, without exception, are larger than the French specimens. Both French (PI. 15, 82, figs. 1-3 and PI. 15, 84, fig. 1) and British (PI. 15, 84, figs. 2-3) specimens are illustrated for comparison; their size difference may be a consequence of their disjunct geographical distribution.
Distribution: The species has been recovered from the Redonian, Upper Pliocene deposits of Apigne (Borehole
II and Le Temple du Cerisier), L'Orchere Pincourt, Palluau I. Palluau II and a mixed sample, all from NW France (see J.-P. Margerel, Les Foraminiferes du Redonien. Systematique, Repartition stratigraphique, Paleoecologie, Nantes, 1. 8-26, 1968 for sample details). It also occurs in a bulk sample (sample no. 1 ) and a sample of blue clay (sample no. 29) from the Upper Pliocene deposits of Vicarage Pit, St. Erth, Cornwall, England (see C. Maybury, Taxonomy, Palaeoecology and Biostratigraphy of Pliocene Benthonic Ostracoda from St. Erth and NW France, unpub. PhD thesis, Univ. Wales, 1, 3-6, 1985 for sample details).
Explanation of Plate 15, 84
•Fig. 1, 9 LV, int. lat. (paratype, OS 12885, 620 /zm long); fig. 2, 9 RV, ext. lat. (paratype. OS 12886, 720 /um long); fig. 3, cf RV, int.
lat. (paratype, OS 12887, 780/um long).
Scale A (200/um; x86), figs. 1-3.
Holotype:
Type locality:
Derivation of name: Figured specimens:
Stereo-Atlas of Ostracod Shells 15, 82
Loxoconcha athersuchi (2 of 4)
Stereo- Atlas of Ostracod Shells 15, 84
Loxoconcha athersuchi (4 of 4)
Stereo-Atlas of Ostracod Shells 15 (19) 85 - 595.337.14 (116.21) (420: 162.003.50)
88(1988)
: 551.351 + 552.52
Ektyphocythere quadrata ( 1 of 4)
ON EKTYPHOCYTHERE QUADRATA BOOMER & LORD sp. nov.
by Ian Boomer & Alan Lord (University College, London)
Ektyphocythere quadrata sp. nov. sp. A.; A. Lord, Palaeontology, 17 (3), 614, pi. 90, figs. 11, 12.
sp. A of Lord, 1974; P. Donze, in: Oertli, H. J. (Ed.), Atlas des Ostracodes de France. Memoires , 114, pi. 25, figs. 12, 13, Pau.
British Museum (Nat. Hist.) no. OS 13237; 9 LV.
Thorncombe Beacon, Dorset Coast; lat. 50° 43'0"N, long. 2° 48'30''W. Amaltheus margaritatus clay (sample 62 of Lord 1974); late Pliensbachian, Amaltheus subnodosus Subzone. Jurrasic.
With reference to the distinctive lateral outline.
British Museum (Nat. Hist.) nos. OS 13236 (cf LV: PI. 15, 86, fig. 1), specimen lost ( cf RV: PI. 15, 86, fig. 2), OS 13237 (9 LV: PI. 15, 88, fig. 3), OS 13238 (9 RV: PI. 15. 88, fig. 1), OS 13239 (9 RV: PI. 15, 88, fig. 2), OS 13240 (9 LV: P). 15. 88, fig. 3).
All specimens from the type level and locality.
A distinctly quadrate species of Ektyphocythere. Valves elongate, slightly more elongate in the larger left valve. Dorsal and ventral margins converge only slightly posteriorly, with well-marked posterior cardinal angles in both valves. Ornament consists of uniform, longitudinal ribs showing weak triangular alignment. Intercostal surface finely punctate. Hinge hemimerodont. each tooth comprising seven bifid elements. Muscle scars as figured (see Text-fig. L). Inner lamella broad, fused throughout. Marginal pore canals simple and straight, seven anteriorly, four posteriorly. Sexual dimorphism is apparent, the presumed males being more elongate (PI. 15. 86. figs. 1, 2). Overlap is best developed along posterior margin and at anterior cardinal angle.
Explanation of Plate 15. 86
Fig. 1, cf LV. ext. lat. (OS 13236, IAS pm long): fig. 2, cf RV. ext. lat. (specimen lost. 775/am long): fig. 3, 9 LV, ext. lat. (holotype. OS 13237, 695/am long). Scale A (100/xm; x 105). figs. 1-3.
1974 Ektyphocythere 1985 Ektyphocythere Elf -Aquitaine, 9 Holotype: Type locality:
Derivation of name: Figured specimens:
Diagnosis:
Stereo- Atlas of Ostracod Shells 15, 87 Ektyphocythere quadrata (3 of 4)
Remarks: Recorded from the Dorset Coast only from the subnodosus Subzone (Lord 1974). Donze (1985)
figured two specimens from the early Domerian of France, one from the A. margaritatus Zone of Tilly-sur-Seulles, Calvados and the other from the Amaltheus stokesi Subzone (equivalent to the lower part of the British A. margaritatus Zone) of Saint-Vincent-Sterlange, Vendee, both of which undoubtedly belong to the new species. In his accompanying range chart Donze gives a stratigraphical distribution for the species of late Pliensbachian. The present authors also have sporadic records of this species from the Mochras borehole. Wales. The youngest record of the species is from a Dactvlioceras tenuicostatum Zone marl from the Ilminster area (Nat. Grid Ref. 406157), England.
Maupin ( Geobios , 11, 107-111, 1978) described two new species of “ Procytheridea ?" from the earliest Toarcian of Vendee, France. One of these species, P. jardensis, has an outline similar to that of E. quadrata (Maupin 1978. pi. 1. figs. 5-11.) but has fewer, less distinct primary ribs. The second species, P. neumannae, has an outline similar to the genus Gramannella but possesses a ribbing pattern similar to E. quadrata (Maupin 1978, pi. 1. figs. 1-4.). P. jardensis has been recorded from the P. spinatum Zone of the Mochras Borehole and probably evolved from E. quadrata in the late Pliensbachian.
Material studied: Three adult carapaces, 150 adult valves and|30 juvenile valves.
Text fig. 1. Adductor and frontal muscle scars
of right valve of Ektyphocythere quadrata.
Distribution .
Acknowledgements :
The Pliensbachian Pleuroceras spinatum, A. margaritatus (A. stokesi Subzone) and Tragophyl- loceras ibex zones of the Mochras borehole, Wales; A. stokesi to P. spinatum zones, late Pliensbachian of France (Donze, 1985); A. subnodosus Subzone of the Dorset Coast (Lord 1974) and the Toarcian, D. tenuicostatum Zone of the Ilminster area, England.
Dept Education, Northern Ireland and University College, London, for their financial support.
Explanation of Plate 15, 88
Fig. 1, 9 RV, int. lat. (OS 13238, 645/um long); fig. 2, 9 RV, ext. lat. (OS 13239, 715/im long); fig. 3, 9 LV, int. lat. (OS 13240. 640/u.m long). Scale A (100/zm; x 146), fig. 1; scale B (100/u.m; X 100), figs. 2, 3.
Ektyphocythere quadrata (2 of 4)
Stereo-Atlas of Ostracod Shells 15, 86
Stereo- Atlas of Ostracod Shells 15, 88
Ektyphocythere quadrata (4 of 4)
Stereo-Atlas of Ostracod Shells 15 (20) 89-92 (1988) Ektyphocythere lanceolata ( 1 of 4)
595.337.14 (116.213) (429 : 162.005.52) : 551.351 + 552.52
ON EKTYPHOCYTHERE LANCEOLATA BOOMER sp. nov.
by lan Boomer ( University College, London)
Ektyphocythere lanceolata sp. nov.
Holotype: Type locality:
Derivation of name: Figured specimens:
British Geological Survey, Keyworth no. MPK 5800, 9 carapace.
Mochras Borehole, Dyfed, Wales (Nat. Grid Ref. 55332594); lat. 52° 51'0"N, long. 4° 06'30"W. Sample no. 5 (609.8-61 1 .2m); Toarcian, Dumortieria levesquei Zone (D. moorei Subzone), Jurassic.
With reference to the valve outline in lateral view.
British Geological Survey nos. MPK 5800 (holotype, 9 car.: PI. 15, 90, fig. 1), MPK 5801 (9 LV: PI. 15, 90, fig. 2), MPK 5802 (9 RV: PI. 15, 92, fig. 1), MPK 5803 (9 car.? PI. 15, 92, fig. 2), MPK 5804 (9 LV; PI. 15, 94, fig. 3).
All specimens are from type level and locality.
Explanation of Plate 15, 90
Fig. 1, 9 LV, ext. lat. (holotype, MPK 5800, 730/im long); fig. 2. 9 RV. ext. lat. (MPK 5801, 750/u.m long). Scale A (100/i.m; x!15), figs. 1, 2.
Stereo-Atlas of Ostracod Shells 15, 91 Ektyphocythere lanceolata (3 of 4)
Diagnosis:
Remarks:
Distribution :
A species of Ektyphocythere with a distinctly elongate (lanceolate) lateral outline. Dorsal and ventral margins converging to a narrowly rounded posterior in the left valve, with a more triangular and pointed posterior margin in the right valve. Ornament consists of fine longitudinal ribs in weak triangular alignment with intercostal punctation. Marginal zone broad and fused throughout. Hinge hemimerodont, but details of the terminal elements unknown. Material available suggests that muscle scars are typical of the genus. Left valve larger than right; overlap generally weak but best developed at the cardinal angles. Sexually dimorphic, the presumed males being more elongate and less inflated posteriorly.
Ektyphocythere lanceolata is closely related to the Pliensbachien to Toarcian E. quadrata Boomer & Lord (Stereo-Atlas Ostracod Shells, 15, 85-88, 1988), the main distinguishing feature being the more obviously tapering outline of the former. Their respective stratigraphical positions suggests a close evolutionary link.
Material studied; 20 adult carapaces, 35 adult valves and 15 juvenile valves and fragments. Only a few poorly preserved male specimens were recovered.
Only recorded from the late Toarcian of the Mochras Borehole, Wales.
Explanation of Plate 15, 92
Fig. 1 , 9 RV, int. lat. (MPK 5802, 745 /im long); fig. 2, 9 LV, ext. lat. (MPK 5803, 705 pm long); fig. 3, 9 LV, int. lat. (MPK 5804, 740jum long).
Scale A (100/u.m; x 100), figs. 1-3.
Ektyphocythere lanceolata (2 of 4)
Stereo- Atlas of Ostracod Shells 15, 90
Stereo- Atlas of Ostracod Shells 15, 92
Ektyphocythere lanceolata (4 of 4)
Stereo-Atlas of Ostracod Shells 15 (21) 93-96 ( 1988) 595.337.14 (116.213) (420 : 162.002.51) : 551.351 + 552.52
Ektyphocy there anterocosta ( 1 of 4)
ON EKTYPHOCYTHERE ANTEROCOSTA BOOMER sp. nov.
by Ian Boomer (University College , London)
71986 Ektyphocy there
Holotype: Type locality :
Derivation of name: Figured specimens:
Ektyphocythere anterocosta sp. nov.
sp. A. N. R. Ainsworth. Bull. geol. Surv. Ir., 3. 316, pi. 9, figs. 7, 8, 10-12.
British Museum (Nat Hist.) no. OS 13277; cf RV.
Temporary road exposure on the A303 Ilminster bypass. Boxstone Hill. Dorset. Nat. Grid Ref. 402156 (lat. 50° 44'N, long. 2° 30'W); marl approximately 30cm below base of Yeovil Sands. Toarcian, Pseudogrammoceras fallaciosum Subzone.
With reference to the ornament on the anterior lateral surfaces.
British Museum (Nat. Hist.) nos. OS 13276 ( cf LV: PI. 15. 94. fig. 1). OS 13277 (holotvpe, cf RV: PI. 15, 94, fig. 2; PI. 15, 96, figs. 1, 5), OS 13278 (9 LV: PI. 15. 94, fig. 3: PI 15. 96' fig. 4). OS 13279 (RV juv.: PI. 15, 94, fig. 4), OS 13280 (LV juv.: PI. 15. 94, fig. 5). OS 13281 ($ LV: PI. 15. 96, fig. 2), OS 13282 ($ car: PI. 15, 96, fig. 3). Nos. OS 13276-78. 81. 82 from type level and locality; nos. OS 13279, 80 from upper part of Hildoceras bifrons Zone, type section. 80cm below type level.
A species of Ektyphocythere distinguished by the coarsely reticulate ornament especially on the anterior third of the lateral surface where it is dominated by several primary costae aligned parallel to the anterior margin. In lateral view, carapace is elongate oval tapering to a narrowly rounded posterior; right valve slightly more quadrate than left; ornament of primary ribs in roughly triangular alignment; secondary cross ribs are strongly developed in well-preserved specimens; in
Explanation of Plate 15, 94
Fig. 1, cf LV, ext. lat. (OS 13276, 820 pirn long); fig. 2, C f RV, ext. lat. (holotype. OS 13277. 800 /zm long): fig. 3 9 LV. int. lat. (OS
13278, 780/xm long); fig. 4. juv. RV, ext. lat. (OS 13279, 700/um long); fig. 5. juv. LV, ext. lat. (OS 13280. 690^im long).
Scale A (100/u.m; x75), figs. 1-5.
Diagnosis:
Stereo- Atlas of Ostracod Shells 15, 95
Diagnosis (cont.):
Ektyphocythere anterocosta (3 of 4)
the right valve apex of the triangular ribbing projects beyond dorsal margin. Left valve overlaps right most markedly at the cardinal angles and along the ventral margin (see PI. 15. 96. fig. 3). Males more elongate than females. Inner margin is broad and fused throughout. Six anterior and four posterior simple marginal pore canals. Hinge hemimerodont(?) with each tooth socket consisting of seven or eight bifid elements (see PI. 15, 94, fig. 4). Details of the median element unknown. Muscle scars as figured (Text-fig. 1).
Remarks: Material studied consists of five carapaces and 69 valves. In well-preserved specimens this species
is quite distinct. It may, however, be confused with E. intrepida Bate & Coleman, 1975 in poorly preserved specimens. The two may be differentiated by the form of the anterior lateral ornament. In E. anterocosta the primary ribs parallel the anterior margin whereas in E. intrepida the primary ribs meet at an acute angle in that part of the valve. In the latter, no primary ribs follow the course of the anterior margin. E. rugosa (Bizon. 1960) and E. bucki (Bizon, 1960) differ from the new species both in outline and pattern of ribbing.
Ainsworth (op. cit.) described similar specimens from the Toarcian and Aalenian of the Fastnet Basin; his material is too poorly preserved for an accurate taxonomic assessment.
Distribution: El. bifrons and Grammoceras thouarsense zones, Toarcian, of the Ilminster area, England.
Text fig. 1. Adductor and frontal muscle scars of female left valve of E. anterocostata (OS 13278).
10/xm
Explanation of Plate 15, 96
Fig. 1, cf RV, ant. ornament (holotype OS 13277); fig. 2, 9 LV, ext. lat. (OS 13281, 730/j.m long); fig. 3, 9 car., ext. lat. (OS 13282.
790/u.m long); fig. 4, 9 LV, int. lat. post, hinge (OS 13278); fig. 5, cf RV, int. lat. (holotype, OS 13277, 800^un long). Scale A (50/u.m; x 160), fig. 1; scale B (100/u,m; x70), figs. 2, 3, 5; scale C (50/u.m; x250), fig. 4.
Stereo- Atlas of Ostracod Shells 15, 96
Ektyphocythere anterocostata (4 of 4)
Stereo-Atlas of Ostracod Shells 15 (22) 97-100 (1988) Romecytheridea tenuisculpta (1 of 4)
595.337.14 (119.29) (675 : 163.029.06) : 551.312
ON ROMECYTHERIDEA TENUISCUEPTA (ROME)
by Karel Wouters
(Koninklijk Belgisch Instituut voor Natuurwetenschappen, Brussels, Belgium )
Genus ROMECYTHERIDEA nom. nov.
1962 Neocytheridea gen. nov. D. R. Rome, Expl. Hydrobiol. Lac Tanganika, Res. Scient., 3(8), 291 ( non Neocytheridea Grekoff, 1953, non Neocytheridea Rajagopalan, 1962).
Type-species (by original designation): Neocytheridea tenuisculpta Rome, 1962.
Derivation of name: After DOM R. Rome (1893-1974) who described the genus Neocytheridea from Lake
Tanganyika.
Diagnosis: Medium-sized valves with anterior and posteroventral rim; sexual dimorphism pronounced;
females with posteroventral brood-pouch; males very narrow in dorsal view; females broad in dorsal view; hinge merodont; V-shaped frontal scar; fulcral point present; small anterior and indistinct posterior vestibulum; numerous marginal pore canals, often bifurcating; valve surface reticulated, sometimes with nodes and protuberances.
Romecytheridea tenuisculpta (Rome, 1962)
1962 Neocytheridea tenuisculpta sp. nov. D. R. Rome, Expl. Hydrobiol. Lac Tanganika, Res. Scient., 3(8), 291, figs. 81, 82.
Holotype: Rome’s collection “Ostracodes du Lac Tanganika” is deposited in the “Koninklijk Belgisch
Instituut voor Natuurwetenschappen”, Brussels, but the type-series of Neocytheridea tenuisculpta is lacking and its whereabouts unknown.
Type locality: Lake Tanganyika, Zaire, SE of Kalemie ( = Albertville) (approx, lat. 5° 57'S, long. 29° 10'E),
depth 7m. Recent, non-marine.
Explanation of Plate 15, 98
Fig. 1, 9 LV, ext. lat. (OC 1287, 670/u.m long); fig. 2, cf LV, ext. lat. (OC 1290, 660/u.m long); fig. 3, Cf RV, ext. lat. (OC 1288, 680 /u,m long). Scale A (200 p-m; x90), figs. 1-3.
Stereo- Atlas of Ostracod Shells 15, 99 Romecytheridea tenuisculpta (3 of 4)
Figured specimens: Koninklijk Belgisch Instituut voor Natuurwetenschappen. Brussels, nos. OC 1287 (9 car.: PI. 15,
98, fig. 1), OC 1288 (cf car.: PI. 15, 98, fig. 3), OC 1289 (cf LV: PI. 15, 100, fig. 1), OC 1290 (cf car.: PI. 15, 98, fig. 2; PI. 15, 100, fig. 2)), OC 1291 (9 car.: PI. 15, 100, fig. 3), OC 1292 (cf LV: Text-fig. 1). All figured specimens are from Lake Tanganyika, Zaire, Isle of Kavala, Bay of Bracone (lat. 5° 39'S, long. 29° 22'E), depth 12m (Kavala is an islet near the West bank, at about 40km NE of Kalemie), and were found in a sediment sample which was collected by the “Mission Hydrobiologique du Lac Tanganika” on 2nd February 1947 (Station no. 138).
Diagnosis: Valves relatively large and thick-shelled; subcentral tubercle present; posteroventral brood pouch
small; posterodorsal node lacking; hinge strongly developed; numerous marginal pore canals; males without mediolateral protuberances; posterior extremity of male carapace in dorsal view narrow.
Distribution: Recent: R. tenuisculpta is known from different localities in Lake Tanganyika. (1) the
type-locality, (2) Zaire, Bay of Bracone of the Isle of Kavala, 40km NE of Kalemie, (3) Zaire, off Moliro, depth 3m (coll.: L. Stappers, 21st November 1912; sample no. 1686), (4) Burundi, N end of Maholi Mountains, depth 2m (coll.: A. Cohen, 1986; sample no. 86.RJ.61B) and (5) Tanzania, Kapili, depth 30m (coll.: A. Cohen, 1986; sample no. 86.RJ.76).
Text-fig. 1. cf LV, int. lat. (OC 1292, 710/u.m long).
200 jum
Explanation of Plate 15, 100
Fig. 1, cf LV, int. lat. (OC 1289, 670Mm long); fig. 2, cf car., dors. (OC 1290, 660 long); fig. 3, 9 car., dors. (OC 1291, 680/am long). Scale A (200/u.m; x90), figs. 1-3.
Romecytheridea tenuisculpta (2 of 4)
Stereo-Atlas of Ostracod Shells 15, 100
Romecytheridea tenuisculpta (4 of 4)
Stereo- Atlas of Ostracod Shells 15, 98
Stereo-Atlas of Ostracod Shells 15 (23) 101-106 (1988) Romecytheridea ampla (1 of 6)
595.337.14 (119.9) (675 : 163.029.06 + 163.030.09) : 551.312
ON ROMECYTHERIDEA AMPLA WOUTERS sp. nov.
by Karel Wouters
(Koninklijk Belgisch Instituut voor Natuurwetenschappen, Brussels, Belgium )
Romecytheridea ampla sp. nov.
Koninklijk Belgisch Instituut voor Natuurwetenschappen, Brussels, no. OC 1295; 9 car. [Paratypes: nos. OC 1296-OC 1309],
Lake Tanganyika, Zaire, Isle of Kavala, Bay of Bracone, 40km NE of Kalemie (approx, lat. 5° 39'S, long. 29° 22'E); Recent, non-marine.
Latin, ampins = wide, because of the wide female carapace (in dorsal view).
Koninklijk Belgisch Instituut voor Natuurwetenschappen, Brussels, nos. OC 1295 (holotype, 9 car.; PI. 15, 102, fig. 1), OC 1296 (paratype, 9 car.; PI. 15, 102, fig. 2), OC 1297 (paratype, cf car.: PI. 15, 102, fig. 3), OC 1298 (paratype, cf car.: PI. 15, 104, fig. 2), OC 1299 (paratype, 9 car.: PI. 15, 104, fig. 3), OC 1301 (paratype, 9 LV: PI. 15, 104, fig. 1), OC 1303a (paratype, cf LV: Text-fig. la), OC 1303b (paratype, preparation, cf appendages: Text-fig. lb, lc. Id, le, lg; Text-fig. 2b, 2d, 2f), OC 1302b (paratype, preparation, cf appendages: Text-fig. If; Text-fig. 2c, 2e), OC 1309b (paratype, preparation, 9 appendages: Text-fig. 2a, 2g). OC 1295-OC 1300 are from the type-locality; OC 1301 -OC 1309 are from Zaire, S Lake Tanganyika, between Moliro and Vua (station 1718) (approx, lat. 8° ll'S, long. 30° 31'E); collected at a depth of 8m by Dr Louis Stappers on 25th November 1912 during the “Mission Stappers 1911-1913", the first Belgian zoological expedition to Lake Tanganyika.
Explanation of Plate 15, 102
Fig. 1, cf LV, ext. lat. (holotype, OC 1295, 460 /Am long); fig. 2, 9 RV, ext. lat. (paratype, OC 1296, 460 pm long); fig. 3. cf RV, ext.
lat. (paratype, OC 1297, 450/Am long).
Scale A (200/un; x 140), figs. 1-3.
Stereo- Atlas of Ostracod Shells 15, 103 Romecytheridea ampla (3 of 6)
Diagnosis: Valves relatively small and thin-shelled; subcentral tubercle absent; large posteroventral brood
pouch and slightly smaller posterodorsal knob-like thickening; hinge very weakly developed; few marginal pore canals; male with mediolateral protuberances; posterior extremity of male carapace truncate in dorsal view.
Distribution: Recent: R. ampla is known from different localities in Lake Tanganyika. (1) the type-locality, (2)
Zaire, between Moliro and Vua, depth 8m, coll. L. Stappers, 25th November 1912 (sample no. 1718), (3) Zaire, off Moliro, depth 30m (sample no. 1680) and 3m (sample no. 1686), coll. L. Stappers, 21st November 1912, (4) S Burundi, about 100km S of Busumbura, depth 2.5m, coll. Andrew Cohen, 1985 (sample no. 85.18), (5) Burundi, 39km S of Busumbura, depth 27m, coll. A. Cohen, 1986 (sample no. 86.RJ.56). The species was also recorded by Mondeguer (1984) as “ Neocytheridea ” cf. tenuisculpta from the Bay of Burton, N Lake Tanganyika (A. Mondeguer. La Baie de Burton (Fosse Nord du Lac Tanganyika), approche sedimentologique et structurale. Unpubl. Dipl. Etude Approf., Univ. de Bretagne, 95 pp, 1984.).
Explanation of Plate 15, 104
Fig. 1, 9 LV, int. lat. (paratype, OC 1301, 440 /xm long); fig. 2, cf car., dors, (paratype, OC 1298, 440 pm long); fig. 3, 9 car., dors., (paratype, OC 1299, 450/xm long).
Scale A (200/aiti; x 140), figs. 1-3.
Holotype:
Type locality:
Derivation of name: Figured specimens:
Stereo- Atlas of Ostracod Shells 15, 102
Romecytheridea ampla (2 of 6)
Stereo-Atlas of Ostracod Shells 15, 104
Romecytheridea ampla (4 of 6)
Stereo-Atlas of Ostracod Shells 15, 105
Romecytheridea ampla (5 of 6)
Text-fig. 2. a, 9 1st leg (paratype, OC 1309); b, cf right 1st leg (paratype, OC 1303); c, cf left 1st leg (paratype, OC 1302); d, cf right 2nd leg (paratype, OC 1303); e, cf left 2nd leg (paratype, OC 1302); f, cf 3rd leg (paratype, OC 1303); g, 9 furca (paratype, OC
1309).
Text-figs, la-g cf. paratype (OC 1303. 450/nm long): a, LV, int. lat . ; b. antennula; c, antenna; d, mandibula; e, maxillula; f, brush-like organ; g, copulatory organ.
Romecytheridea ampla (6 of 6)
Stereo- Atlas of Ostracod Shells 15, 106
Stereo-Atlas of Ostracod Shells 15 (24) 107-114 (1988) Anisocyamus elegans (1 of 8)
595.336.16 (113.312) (766 : 162.098.34) : 551.351 + 552.52
ON ANISOCYAMUS ELEGANS (HARRIS)
by David J. Siveter & Mark Williams (University of Leicester, England)
Genus ANISOCYAMUS Martinsson, 1960 Type-species (by original designation): Primitiopsis elegans Harris, 1957
Diagnosis: Primitiopsid ostracodes lacking adductorial pit, preadductorial node, or any discrete lobation.
Valves unequal (right valve larger), reticulate. Ornamentation of the right valve is absent, reduced, or restricted in distribution. No velum in adult tecnomorph. Dolon of heteromorph extends from the posterior hinge corner along the rear part of the valve, to the central ventral area, but is continued only as a bend along the rest of the ventral and anterior surfaces. Adductor muscle spot present.
Remarks: Only two species, A. bassleri (Harris, 1931) (see Siveter & Williams, Stereo-Atlas Ostracod Shells
15 (25) 115-122, 1988), and A. elegans are so far assigned to this genus (Martinsson 1960). Martinsson (op. cit.) also questionably assigned Primitiopsis minutiperforata Harris, 1957 to this genus. Work in progress will seek to clarify the taxonomic position of the latter species.
Jangadellina Melnikova, 1980 (= Neocyamus Melnikova, 1979; Palaont. z. , 4, 47-59) apparently differs from Anisocyamus by lacking distinct reticulation and by having dorsal valve surfaces extend above the hingeline in lateral view (Melnikova 1979, op. cit.).
Explanation of Plate 15. 108
Fig. 1, d” car., post. (OS 13304, 1.12mm long). Figs. 2-5, d” car. (OS 13305, LV 1.14mm long): fig. 2, LV ext. lat. ; fig. 3, obi. vent.; fig. 4, vent.; fig. 5, RV, ext. lat.
Scale A (250/u.m; x45), figs. 1, 2, 5; scale B (250/u.m; x40), figs. 3, 4.
Stereo-Atlas of Ostracod Shells 15, 109
Anisocyamus elegans (3 of 8)
Anisocyamus elegans (Harris, 1957)
1957 Primitiopsis elegans n. sp., R. W. Harris, Okla. Geol. Surv. Bull., 75, 203, pi. 6, fig. 18.
1960 Anisocyamus elegans (Harris); A. Martinsson, Bull. Geol. Inst. Univ. Upps., 38, 143, pi. 1, figs. 1-8, pi. 2, figs. 1-8, text- fig. 1.
1960 A. elegans (Harris); R. W. Harris, Okla. Geol. Notes, 20, 178, text-fig. 1.
1964 P. elegans Harris; R. W. Harris, Okla. Geol. Notes 24, 137, tab. 1.
1979 P. elegans Harris; R. E. L. Schallreuter, Neues Jb. Geol. Palaontol., 12, 745.
Holotype: Museum of Comparative Zoology, Harvard University, U.S.A., no. 4594; 9 left valve (shows
distortion posteriorly, adjacent to dolon).
Type locality : Approximately 2.5 m above the base of Decker’s Zone 32 (see Harris 1957), Tulip Creek
Formation, Simpson Group, Ordovician; U.S. Highway 77 (Sec. 25, T. 2s. R1E), Arbuckle Mountains, Oklahoma, U.S. A.; approximately lat. 34° 25'N, 97° 08'W.
Figured specimens: British Museum (Nat. Hist.) nos. OS 13304 (cf car.: PI. 15, 108, fig. 1), OS 13305 (cf car.: PI. 15,
108, figs. 2-5), OS 13306 (9 car.: PI. 15, 110, figs. 1,4), OS 13307 (9 LV: PI. 15, 110, figs. 2, 3; PI. 15, 112, fig. 5; PI. 15, 114, fig. 6). OS 13308 (9 car.: PI. 15, 110, fig. 5; PI. 15, 114, fig. 5), OS 13309 (9 LV: PI. 15, 112, figs. 1-3), OS 13310 (9 RV: PI. 15, 112, fig. 4), OS 13311 (juv. car.: PI. 15, 114, figs. 1, 2), OS 13312 (juv. RV: PI. 15, 114, figs. 3, 4).
All the specimens were recovered by the authors from a 3cm thick shale bed in the Mountain Lake Member of the Bromide Formation (Simpson Group, Ordovician) approximately 42m below the base of the overlying Viola Limestone. Collected from the W side of Highway 99 (sec. 12, T.l N., R.6 E), about 5km S of Fittstown, Oklahoma, U.S. A.; approximately lat. 34° 41'N, long. 97° 41'W.
I
Explanation of Plate 15, 110
Fig. 1, 4, 9 car. (OS 13306, 1.03mm long): fig. 1, post.; fig. 4, vent. Figs. 2, 3, 9 LV (OS 13307, 1.08mm long): fig. 2, ext. lat.; fig.
vent. obi. Fig. 5, 9 car., ext rt. lat. (OS 13308, 1.0mm long).
Scale A (250 /urn; x48), figs. 2, 3; scale B (150/xm; x45), figs. 1, 4; scale C (200 /am; x50), fig. 5.
3,
t
Anisocyamus elegans (2 of 8)
Stereo-Atlas of Ostracod Shells 15, 110
Anisocyamus elegans (4 of 8)
Stereo-Atlas of Ostracod Shells 15, 108
Stereo- Atlas of Ostracod Shells 15 , 111
Anisocyamus elegans (5 of 8)
Diagnosis:
Remarks:
Distribution :
Species oi Anisocyamus with finely reticulate left valve. Reticulation developed only as a restricted field antero-centrally of the muscle spot on the right valve, allowing 10- 12 fossae to occur between the anterior edge of the adductor muscle spot and the anteriormost part of the valve.
A row of tubercles occurs along the admarginal surface (from the anterocentral to the posterocentral area) of juvenile and adult tecnomorph left valves, and is also present but not posteriorly in heteromorphs. Martinsson {op. cit.) also noticed these tubercles in both A. elegans and A. bassleri but considered them to be restricted to the anteroventral section of the left valve margin. A second row of faint tubercles are also located more admarginally in the anteroventral area of the left valve.
The reticulate ornament of the right valve occasionally extends beyond the adductor muscle spot to the postadductorial area of the right valve. As suggested by Martinsson (op. cit.) the spacing of ornament is often better described as punctate on this valve. In a few cases the ornament of the adult left valve also has the appearance of punctation rather than the more usual reticulation.
Martinsson's (op. cit.) material (from Oklahoma) was indicated to be from the Tulip Creek Formation, but is probably from the Bromide Formation (Mountain Lake Member) according to the stratigraphy of Fay & Grafham (Univ. Kansas Paleontol. Contrib. Monograph 1, 14, 1982). A. elegans is known from the Tulip Creek and Bromide formations, middle Ordovician (Whiterockian), Arbuckle Mountains, Oklahoma, U.S.A.
Explanation of Plate 15, 112
Figs. 1-3, $ LV (OS 13309, 1.16mm long): fig. 1, int. lat. ; fig. 2, int. lat. obi.; fig. 3, detail of tubercles on admarginal surface. Fig. 4, 9 RV, int. lat. (OS 13310, 1.12mm long). Fig. 5, 9 LV, ext. detail of muscle spot (OS 13307).
Scale A (200 /xm; x46), figs. 1, 2; scale B (50 /xm; x370), fig. 3; scale C (200/xm; x48), fig. 4; scale D (50/xm; x255), fig. 5.
!
I
Stereo-Atlas of Ostracod Shells 15, 113
Anisocyamus elegans (7 of 8)
FITTSTOWN
®\
ARBUCKLE MOUNTAINS
—>
/
S' ~zS.
„ t \ \ A
(\ [ \J VJ \ ' J
) N
Text-fig. 1. Principal Ordovician Simpson Group sections in southern Oklahoma, U.S.A. (see Fay & Grafham 1982, Univ. Kansas Paleontol. Contrib. Monograph 1, 335-369). 1, North Interstate 35; 2, Highway 99 south of Fittstown; 3, South Interstate 35; 4, Rock Crossing, Criner Hills; 5 Spring Creek, Arbuckle Ranch east of Pooleville. Inset shows middle Ordovician palaeogeography of Oklahoma (adapted from Longman 1982, Univ. Kansas Paleontol. Contrib. Monograph 1, 7).
Explanation of Plate 15, 114
Figs. 1, 2, juv. car. (OS 13311, 0.86mm long): fig. 1, ext. It. lat.; fig. 2, ext. It. lat. obi. Figs. 3, 4, juv. RV (OS 13312, 0.88mm long): fig. 3, ext. lat.; fig. 4, ext. vent. obi. Fig. 5, 9 car., RV ornament (OS 13308). Fig. 6, 9 LV, ornament (OS 13307). Scale A (200 /ixm; x49), figs. 1, 2; scale B (200/xm; x45), figs. 3, 4; scale C (200/xm; x 192), fig. 5; scale D (50 /xm; x240), fig. 6.
Anisocyamus elegans (6 of 8)
Stereo-Atlas of Ostracod Shells 15, 114
Stereo-Atlas of Ostracod Shells 15, 112
Anisocyamus elegans (8 of 8)
Stereo-Atlas of Ostracod Shells 15 (25) 115-122 (1988) Anisocyamus bassleri (1 of 8)
593.336.16 (113.312) (766 : 162.098.34) : 551.351 + 552.52
ON ANISOCYAMUS BASSLERI (HARRIS)
by David J. Siveter & Mark Williams (University of Leicester, England)
Anisocyamus bassleri (Harris, 1931)
1931 Primitiopsis bassleri n. sp., R. W. Harris in: C. E. Decker, Okla. Geol. Sun’. Bull., 55, 91, 92, pi. 11, figs. 2a, d, pi. 14, figs. 2a, b.
1934 Primitiopsis bassleri Harris; R. S. Bassler & B. Kellet, Geol. Soc. Am. Spec. Pap., no. 1, 465.
1936 Primitiopsis bassleri Harris; R. W. Harris in: C. E. Decker, Field Conference for the study of the Simpson Formation: Okla. City Geol. Soc., Guidebk., 7.
1936 Primitiopsis bassleri Harris; F. M. Swartz, J. Paleontol., 10. no. 7,558, pi. 83, figs. 2a, b.
1941 P. bassleri Harris; E. A. Schmidt, Abb Senckenb. Naturforsch. Ges., 454. 52.
1949 P. bassleri Harris; I. Hessland, Bull. Geol. Inst. Univ. Upps., 33, 239.
1950 P. bassleri Harris; S. A. Levinson, J. Paleontol., 24, no. 1, 67, 68, text-figs. 4a, b.
1951 P. bassleri Harris; C. E. Decker, Am. Assoc. Pet. Geol. Bull., 24, 913.
1952 P. bassleri Harris; C. E. Decker, Am. Assoc. Pet. Geol. Bull., 36, 135.
1955 P. bassleri Harris; A. Martinsson, Bull. Geol. Inst. Univ. Upps., 36, 1, 19.
1957 P. bassleri Harris; R. W. Harris, Okla. Geol. Surv. Bull., 75, 202, pi. 6, figs. 17a, b.
1960 A. bassleri (Harris); A. Martinsson, Bull. Geol. Inst. Univ. Upps., 38, 146, pi. 3, figs. 1-10.
1960 A. bassleri (Harris); R. W. Harris, Okla. Geol. Notes, 20, 178, text-fig. 1.
1964 P. bassleri Harris; R. W. Harris, Okla. Geol. Notes, 24, 136, tab. 1.
1979 P. bassleri Harris; R. E. L. Schallreuter, Neues Jahrb. Geol. Palaeontol. Monatsh., 12, 745.
Explanation of Plate 15, 116
Fig. 1, cf car., post. (OS 13313, 0.94mm long). Figs. 2, 3, cf car. (OS 13314, 1.19mm long): fig. 2, ext. It. lat . ; fig. 3, obi. vent. Fig. 4.
C f car., vent. (OS 13315, 1.27mm long). Fig. 5, cf RV, ext. lat. (OS 13316, 1.19mm long).
Scale A (150 /urn; x66), fig. 1; scale B (250 /xm; x46), figs. 2, 3; scale C (250 /um; x 38), fig. 4; scale D (250 /xm; x43), fig. 5.
Stereo-Atlas of Ostracod Shells 15, 117 Anisocyamus bassleri (3 of 8)
Lectotype: Designated Martinsson 1960, 146; Harvard Museum of Comparitive Zoology, U.S.A. no. MCZ
4593A; poorly preserved 9 carapace (= Harris 1931, pi. 14, figs. 2a, b). Both valves are abraded with consequent reduction of ornament.
Martinsson (op. cit., 153) stated that the specimen he had chosen for the lectotype of A. bassleri was not registered in the collections of the Harvard Museum of Comparitive Zoology, U.S.A. , the repository for Harris’s (1957) material. We have, however, examined the type material and Martinsson’s chosen lectotype is present in the collection. Harris (1931, 92) mentioned a ‘Type’ but failed to specify which it was. Later Harris (1960, 180) referred his original figures (Harris 1931, pi. 11, figs. 2a, b, and pi. 14, fig. 2b) to Harvard Museum specimen no. MCZ 4593A, which he stated to be the Holotype. This was, however, preceded by Martinsson's designation of the same specimen as lectotype.
Type locality: From the top of Decker's Zone 8 (see Harris 1957), Bromide Formation, 29.9m below the top of
the Simpson Group, Ordovician; about 400m W of U.S. Highway 77 (Sec. 25, T. 2s, R1E), Arbuckle Mountains, Oklahoma, U.S.A.; approximately lat. 34° 25'N, long. 97° 08'W.
Figured specimens: British Museum (Nat. Hist.) nos. OS 13313 (cf car.: PI. 15, 116. fig. 1), OS 13314 (C f LV: PI. 15,
116, figs. 2, 3), OS 13315 (cf car.: PI. 15, 116, fig. 4), OS 13316 (cf car.: PL 15, 116, fig. 5), OS
13327 (9 car.: PI. 15, 118, fig. 1), OS 13317 (9 car.: PI. 15, 118, figs. 2, 3; PI. 15, 122, fig. 3), OS
13318 (9 car.: PI. 15, 118, fig. 4), OS 13319 (9 RV: PI. 15, 118, fig. 5), OS 13320 (9 car.: PL 15,
120, fig. 1), OS 13321 (9 RV: PI. 15, 120, fig. 2), OS 13322 (9 LV: PI. 15, 120, fig. 3), OS 13323 (9 LV: PI. 15, 120, fig. 4), OS 13324 (juv.: PI. 15, 122, figs. 1. 2), OS 13325 (9 car.: PI. 15, 122, fig. 4), OS 13326 (9 RV: PI. 15, 122, fig. 5).
These specimens were recovered from two samples we collected from the Mountain Lake Member, Bromide Formation, Simpson Group, middle Ordovician; from the E side of the Interstate 35 North roadcut (Sec. 30, T.l S., R.2 E), Arbuckle Mountains, Oklahoma, U.S.A.; approximately lat. 34° 25'N, long. 97° 08'W. Specimens OS 13313-OS 13315 are from a shale bed
Explanation of Plate 15, 118
Fig. 1, 9 car., post. (OS 13327, 0.83mm long). Figs. 2, 3, 9 car. (OS 13317, 0.88mm long): fig. 2, ext. It. lat.; fig. 3, vent. obi. Fig. 4, 9 car., vent. (OS 13318. 0.83mm long). Fig. 5, 9 RV, ext. lat. (OS 13319, 0.88mm long).
Scale A (150/xm; x67), fig. 1; scale B (150/xm; x55), figs. 2-5.
Anisocyamus bassleri (4 of 8)
Anisocyamus bassleri (2 of 8)
Stereo- Atlas of Ostracod Shells 15, 116
Stereo-Atlas of Ostracod Shells 15, 118
Stereo-Atlas of Ostracod Shells 15, 119
Figured specimens: (cont.)
Diagnosis:
Remarks:
Anisocyamus bassleri (5 of 8) 25.2m below the base of the overlying Viola Limestone. All the other specimens are from a shale bed 31.4m below the base of the Viola Limestone.
Species of Anisocyamus with coarsely reticulate left valve, reticulation absent on right valve. The reticulation on the left valve allows 6-8 fossae to occur between the anterior edge of the adductor muscle spot and the anteriormost part of the valve.
A. bassleri is distinguished from the only known other congeneric species, A. elegans (Harris, 1957) (see Siveter & Williams, Stereo-Atlas Ostracod Shells, 15, 107-114, 1988) principally by its coarser reticulation and absence of ornament on the right valve. In addition the dolon. which occupies the posterior and posteroventral part of heteromorphic valves, is longitudinally shorter than in A. elegans, while the velar bend of the heteromorph lies closer to the valve edge in A. bassleri (see Marti nsson 1960).
The hinge of the right valve consists of a groove but no 'teeth'; the left valve exhibits a ridge confluent with two minor, terminal depressions (see PI. 15, 120, figs. 2-4). The tooth and socket arrangement observed by Levinson (1950) for A. bassleri has not been seen in the extensive material we have studied and is considered not to be present in the species.
As in A. elegans, a row of tubercles along the margin of the left valve stretches from the anterocentral to the posterocentral area in juvenile and adult tecnomorphic valves, and again appears to be absent posteriorly in heteromorphic values..
The reticulate ornament of A. bassleri is restricted to the left valve during all the observed ontogenetic stages, but is more dense in juveniles than in adults and also covers less of the ventral lateral surface. In addition, the ratio of valve length to valve width increases from juveniles to adults.
Both Harris (1931, 92; 1957, 202) and Martinsson (1960, 147) noted that male specimens are rarer than females. Our population studies on A. bassleri retrieved from the Bromide Formation (Interstate 35 Section. Arbuckle Mountains, Oklahoma) have corroborated these statements
Explanation of Plate 15. 120
Fig. 1, 9 car - ant. (OS 13320, 0.88mm long). Fig. 2 $ RV. int. lat. (OS 13321. 0.91mm long). Fig. 3, 9 LV, int. lat. (OS 13322.
0.88mm long). Fig. 4, 9 LV, int. lat. (OS 13323, 0.88mm long).
Scale A (150/xm; x67), fig. 1; scale B (150/um; x57), figs. 2-4.
Stereo-Atlas of Ostracod Shells 15, 121 Anisocyamus bassleri (7 of 8)
Remarks (cont.): (Text-figs. 1, 2), but only if valves and carapaces are treated as individual specimens.
The muscle scar pattern of Anisocyamus is illustrated for the first time herein (PI. 15. 122. fig. 4). It is ovate and appears to consist of alternating and radiating ridges and grooves. Distribution: A. bassleri is so far only known from the Bromide Formation, middle Ordovician (Whiterockian- Mohawkian), Arbuckle Mountains, Oklahoma, U.S.A.
2
3
□
o o
□ HETEROMORPH LV ■ TECNOMORPH LV
800 900 1000 1100
LENGTH (JJM)
I
1200
Text-fig. 1. Size variation for a ‘population’ of 55 specimens (from a single sample) of A. bassleri. Collected from the Mountain Lake Member of the Bromide Formation, 31.4m below the overlying Viola Limestone, on the Interstate 35 North roadcut section, Arbuckle Mountains, Oklahoma, U.S.A. Sampled material probably crosses time stratigraphic levels and is not intended to infer a single living population.
Text-fig. 2. Size variation for a 'population' of 34 specimens (from a single sample) of A. bassleri. Collected from the Mountain Lake Member of the Bromide Formation, 25.2m below the overlying Viola Limestone, on the Interstate 35 North roadcut section. Arbuckle Mountains. Oklahoma, U.S.A. Sampled material probably crosses time stratigraphic levels and is not intended to infer a single living population.
Explanation of Plate 15, 122
Figs. 1, 2, juv. car. (OS 13324, 0.5mm long): fig. 1, ext. It. lat.; fig. 2, obi. vent. Fig. 3, 9 LV, ext. lat. muscle spot (OS 13317). Fig. 4, 9 car., ext. rt. lat. reticulation (OS 13325). Fig. 5, 9 RV, int. lat- obi., muscle scar pattern (OS 13326).
Scale A (150/um; x82), figs. 1,2; scale B (50/u.m; x 170), fig. 3; scale C (50/um; x 153), fig. 4; scale D (50/um; x206), fig. 5.
Anisocyamus bassleri (8 of 8)
Stereo-Atlas of Ostracod Shells 15, 120
Anisocyamus bassleri (6 of 8)
Stereo-Atlas of Ostracod Shells 15, 122
Stereo-Atlas of Ostracod Shells 15 (26) 123-126 (1988) Leptocythere psammophila (1 of 4)
595.337.14 (119.9) (44:162.004.48) : 551.313.2
ON LEPTOCYTHERE PSAMMOPHILA GUILLAUME
by Marie-Claude Guillaume (Universite Pierre et Marie Curie, Paris, France)
Leptocythere psammophila Guillaume, 1976
1874 Cythere pellucida Baird; G. S. Brady. H. W. Crosskey & D. Robertson, Palaeontogr. Soc. (Monogr.), 28. 142. pi. 3, figs. 20-24 ( non Baird, 1850).
1976 Leptocythere psammophila sp.nov. M.-C. Guillaume, Abh. Verb, naturwiss. Ver. Hamburg (NF) 18/19 (Suppl.), 328, pl.l, fig. 4, pi. 5, figs, a-c, pi. 6, fig. c, text-fig. a.
Holotype: Type locality: Figured specimens:
Natural History Museum, Paris, no. FG756; cf valves and appendages.
[Paratypes, nos. FG758-762]
Pempoul, near Roscoff, Brittany, France; lat. 48° 44'N, long. 04° 01 'W. Intertidal fine sand. Recent.
Natural History Museum, Paris, nos. FG756 (holotype, cf LV: PI. 15, 124, fig. 1), FG757 (9 LV: PI. 15, 124, fig. 5), FG758 (9 LV:P1. 15, 124, fig. 3), FG759 (cf car.: PI. 15, 124, fig. 2), FG760 (9 car.: PI. 15, 124, fig. 4), FG761 (cf car.: PI. 15, 126, fig. 2). FG762 (cf LV: PI. 15. 126, figs. 3-5), FG788 (juv.-l RV: PI. 15, 126, fig. 1).
All except FG757 and FG788 collected by the author from the type locality: FG757 collected at Roscoff, Brittany (lat. 48° 43'N, long. 03°59' W), FG788 at Paimpol, Brittany (lat. 48°47'N, long. 03°03'W). Water temperature in the vicinity of the type locality varies from around 16°C in August to 9.5°C in March; salinity varies from 34.4%o in April to 35.2%o in August-September.
Explanation of Plate 15. 124
Fig. 1, cf LV, ext. lat. (holotype, FG756, 580/u.m long); fig. 2, cf car., dors. (FG759, 570/um long); fig. 3, 9 LV, ext. lat. (FG758.
580/i.m long); fig. 4, 9 car., dors. (FG760, 550/um long); fig. 5. 9 LV, ext. lat. (FG757, 550/xm long).
Scale A (100/u.m; xllO), figs. 1-5.
Stereo-Atlas of Ostracod Shells 15, 125 Leptocythere psammophila (3 of 4)
Diagnosis: Medium to large (530-650 jum long) Leptocythere, ornament varying from fine to coarse pitting.
Post-ocular sulcus weak, dorsomedian sulcus distinct. Posteroventral alar protruberances weak or absent. Colour white, buff or dark brown in living specimens. Both free corners of distal process of male copulatory appendage pointed, one acute, the other obtuse; ventral margin nearly straight with two small indentations; proximal finger-like process curved, a little longer than the ejaculatory duct.
Remarks: This species was for a long time confused with two others, L. pellucida (Baird. 1850) (The Natural
History of the British Entomostraca , Ray Soc., London, 173. pi. 21, fig. 7) and L. castanea (Sars, 1866) (Forh. VidenskSelsk. Krist., 1865, 32.), from which it is distinguished by size, the form and proportions of the valves, and the morphology of the male copulatory appendage (see Guillaume, op. cit. for full discussion of the problem). The confusion arose mainly from the variation in external ornament exhibited by Leptocythere species, populations of which may include both “finely” and “coarsely” ornamented individuals according to the degree of calcification of the valves (e.g., compare PI. 15, 124, fig. 3, with PI. 15, 124, fig. 5) (see C. Kuhl. Abh. Verh. naturwiss. Ver. Hamburg, (NF) 23, 275-301, 1980).
Distribution: Recent: an outer estuarine species found on sandy substrates, from the Atlantic coast of France to
the Baltic.
Text-fig. 1. Cf copulatory appendage (holotype, FG756).
Explanation of Plate 15, 126
Fig. 1, juv.-l, RV (FG788. 490/xm long); fig. 2, cf car., vent. (FG761, 570Mm long); figs. 3-5, cf LV (FG762, 580pm long): fig. 3. int.
lat.; figs. 4, 5, ant. and post, hinge elements.
Scale A (100/um; XllO), figs. 1-3; scale B (50/u.m; x450), figs. 4, 5.
Stereo-Atlas of Ostracod Shells 15, 124
Leptocythere psammophila (2 of 4)
Stereo-Atlas of Ostracod Shells 15, 126
Leptocythere psammophila (4 of 4)
Stereo-Atlas of Ostracod Shells 15 (27) 127-132 (1988) Cytheropteron latissimum (1 of 6)
595.337.14 (119.9) (261.26:161.002.50 + 411:162.005.55) : 551.351
ON CYTHEROPTERON LATISSIMUM (NORMAN)
by David J. Horne & John E. Whittaker (Thames Polytechnic & British Museum , (Natural History), London)
Genus CYTHEROPTERON Sars, 1866
Type species (designated by Brady & Norman, 1889): Cythere latissima Norman. 1865.
1866 Cytheropteron gen. nov. G. O. Sars, Fork. VidenskSelsk. Krist., 1865. 79.
1957 Kobayashiina gen. nov. T. Hanai, J. Fac. Sci. Univ. Tokyo, (2), 11, 30.
1974 Lobosocytheropteron gen. nov. K. Ishizaki & F. J. Gunther, Sci. Rep. Tohoku Univ., sr.2. Geol.. 45. 38.
Diagnosis: Carapace variable in shape; sub-rhomboidal to sub-ovate in lateral view, sub-hexagonal, sub-ovate
or shaped like an arrowhead in dorsal view; usually inflated posteroventrally, often with conspicuous alae. Caudal process usually present. Ornament variable; smooth, pitted or reticulate. Eye spots absent. Valves conspicuously unequal; left valve larger than right valve, but the right valve is usually higher and overlaps the left valve dorsally. Inner lamella of moderate width; anterior vestibulum present, small, posteroventral vestibulum very small or absent. Marginal pore canals straight or weakly sinuous, of varying length: 10-12 anteriorly. Frontal muscle scar v-shaped or heart-shaped, sometimes subdivided. Hinge merodont/entomodont. strongly crenulate or locellate, often with modified anteromedian or posterior elements; the median element varies from straight to sinuous. Sexual dimorphism inconspicuous.
Explanation of Plate 15. 128
Fig. 1, $ LV, ext. lat. (lectotype, 1987.331. 605/u.m long); fig. 2, 9 RV, vent. (1988.303. 640/um long); fig. 3. cf LV. ext. lat., (paralectotype, 1988.302, 600/um long); fig. 4, cf RV, vent. (1988.304. blbpm long); fig. 5. Cf RV. ext. lat. (paralectotype. 1988.302, 600Mm long).
Scale A (100/u.m; x 90), figs. 1-5.
Stereo- Atlas of Ostracod Shells 15, 129 Cytheropteron latissimum (3 of 6)
Diagnosis (cont.): Antennula with five articulated podomeres, the distal one relatively very short. Antenna with
two relatively long, curved distal chelate setae. Setal formulae of basal podomeres of legs: (1:2:1), (1 + 1: 1:1 or 2), (0:1:1). Male copulatory appendage usually with three distal processes; one broad and lamellar, the other two narrow, pointed, variously shaped and situated one on either side of the thick, curved ejaculatory duct.
Remarks: Species of Cytheropteron exhibit considerable variation both in external ornament and in details of
the hinge; in our opinion the minor differences used to distinguish Kobayashiina Hanai and Lobosocytheropteron Ishizaki & Gunther are insufficient to justify separate generic status for these taxa.
Cytheropteron latissimum (Norman, 1865)
1865a Cythere latissima sp. nov. A. M. Norman, in: G. S. Brady (Ed.), Rep. Br. Ass. Advmt. Sci., 1865, 191. *
1865b Cythere latissima sp. nov. A. M. Norman, in: G. S. Brady (Ed.), Nat. Hist. Trans. Northumb., 1, 19, pi. 6, figs 5-8*.
1866 Cytheropteron convexum (Baird); G. O. Sars, Fork. VidenskSelsk. Krist., 1865. 80-81 ( non Cythere convexa Baird, 1850).
1868 Cytheropteron latissimum (Norman); G. S. Brady, Trans. Linn. Soc. Lond., 26, 448, pi. 34, figs. 26-30.
1878 Cytheropteron latissimum (Norman); G. S. Brady, Trans. Zool. Soc. Lond., 10, 403, pi. 69, fig. la-d.
1973 Cytheropteron latissimum (Norman); J. W. Neale & H. V. Howe, Crustaceana , 25, pi. 1, figs. 4a, b.
1980 Cytheropteron latissimum (Norman); R. C. Whatley & D. Masson, Revta esp. Micropaleont., 11, 225-227 . pi. 6, figs. 7, 9. 12.
* Norman published identical type descriptions in two separate publications in 1865; only in one was the species illustrated, however.
Explanation of Plate 15, 130
Fig. 1. $ RV, int. lat. (1988.303, 640/u.m long); figs. 2-4, cf (1988.304, 670yum long): fig. 2, LV, ext. lat.; fig. 3. LV, dors.; fig. 4, RV. ext. lat.
Scale A (100/u.m; x 90), figs. 1-4.
Cytheropteron latissirnum (2 of 6)
Stereo-Atlas of Ostracod Shells 15, 128
Stereo-Atlas of Ostracod Shells 15, 130
Cytheropteron latissirnum (4 of 6)
Stereo-Atlas of Ostracod Shells, 15, 131 Cytheropteron latissimum (5 of 6)
Here designated: British Museum (Nat. Hist.) no. 1987.331; 9 left valve.
[Paralectotype: no. 1988.304, cf left and right valves]
Dogger Bank, central North Sea (approx, lat. 50°45'N, long. 2°00'E); Recent, marine. British Museum (Nat. Hist.) nos. 1987.331 (lectotype, 9 LV: PI. 15. 128, fig. 1), 1988.302 (paralectotvpe, cf; LV: PI. 15. 128, fig. 3; RV: PI. 15, 128, fig. 5), 1988.303 (9 RV: PI. 15. 128, fig. 2; PI. 15, 130, fig. 1), 1988.304 (cf; RV: PI. 15, 128, fig. 4; LV: PI. 15, 130, figs. 2-4).
All were taken from slides in the Norman Collection at the British Museum (Nat. Hist.); the lectotype and paralectotype are from slide no. 1911.11.8 M3673; 1988.303 and 1988.304, from slide no. 1911.11.8 M3670, were collected "between the Cumbrae Isles” (W Scotland, approx, lat. 55° 45'N, long. 4°56'W) on July 8th, 1885, depth 15-25 fathoms (27-46m).
Carapace sub-rhomboidal in lateral view, with a blunt caudal process above mid-height and rounded, truncate alae terminating well behind mid-length. Posteroventral margin compressed. Greatest width a little behind mid-length. Ornamented with vertically elongate fossae in the posterior half, giving way anteriorly to more rounded, scattered fossae.
Neale & Howe {op. cit.) illustrated a syntypic LV from Norman's type material from Holy Island, NE England (housed in the G. S. Brady Collection at the Hancock Museum, Newcastle-upon- Tyne) but did not designate a lectotype.
Recent: NW European coasts between 50° and 70°N; records from the Arctic and off NE America are questionable. A sublittoral species found on a variety of sediment substrates in water depths of 5-80m, usually in normal marine salinities, although in the Baltic it can tolerate salinities as low as 10 o/oo (see Whatley & Masson op. cit. for detailed discussion of distribution and ecology). Pleistocene: many localities in NW Europe (see Whatley & Masson, op. cit. for details). Pliocene: Antwerp Crag (Brady, 1978, op. cit.).
Stereo-Atlas of Ostracod Shells 15, 132 Cytheropteron latissimum (6 of 6)
Text-fig. 1: a, 9 LV, int. lat., viewed in transmitted light; b, cf antennula; c, cf antenna; d, cf copulatory appendage. All drawings based on study of several specimens.
Lectotype:
Type locality: Figured specimens:
Diagnosis:
Remarks:
Distribution:
Stereo- Atlas of Ostracod Shells 15 (28) 133-136 (1988) Buntonia brunensis ( 1 of 4)
595.337.14 (118.21) (437: 1 6 1 .0 16.49) : 551.35 + 552.52
ON BUTONIA BRUNENSIS RlHA sp. nov.
by Jaroslav Rfha
(Moravian Museum, Brno, Czechoslovakia )
Buntonia brunensis sp. nov.
Holotype:
Type locality:
Derivation of name Figured specimens:
Diagnosis:
Dept, of Geology and Paleontology, Moravian Museum, coll. no. MM VI-13-1/3: cf ?, RV. (Paratypes, nos. MM VI-13-1/2, 4-11],
Borehole Ceska HV-208 (35. 6-35. 8m) near Brno, southern Moravia, Czechoslovakia; lat. 49°15'N, long. 16°30'E. Calcareous clays, Orbuline suturalis Zone, lower Badenian, Miocene. Latin name of Brno.
Dept, of Geology and Paleontology, Moravian Museum, coll. nos. MM VI-13-1/2 (paratvpe. 9 ? LV: PI. 15, 134, figs. 1,2), MM VI-13-1/3 (holotvpe, cf ? LV: PI. 15, 134, fig. 3), MM VI-13-1/4 (paratype, 9 ? LV: PI. 15, 136, fig. 2), MM VI-13-1/6 (paratype, cf ? RV: PI. 15. 136. fig. 3). MM VI-13-1/7 (paratype, cf ? RV: PI. 15, 136, fig. 1).
All collected by the author from the type locality and horizon.
Ornament reticulate/pitted; primary reticulation faint, with four bow-shaped ventrolateral ribs, two transverse ribs in the area of anterodorsal corner; secondary reticulation conspicuous, in the form of small, rounded pits. Five denticles on posteroventral margin and a conspicuous spine at the end of the shortest ventrolateral rib in the posteroventral area.
Explanation of Plate 15, 134
Fig. 1,2, 9? LV (MM VI-13-1/2, 480pm long): fig. 1, ext. lat.; fig. 2, detail of posteroventral spine; fig. 3, cf? LV, ext. lat. (holotype, MM VI-13-1/3, 510pm long).
Scale A (100pm; x!50), figs. 1, 3; scale B (25pm; x620), fig. 2.
Stereo-Atlas of Ostracod Shells 15, 135 Buntonia brunensis ( 3 of 4)
Remarks: B. brunensis is similar to B. sublatissima dertonensis Ruggieri. 1954 (Atti della Soc. Ital. Sci. Nat,
93, 565, 568), having a prominent spine which serves as a base for distinguishing B. dertonensis from B. sublatissima (Neviani). To quote Professor G. Ruggieri (pers. comm., 1983): "Buntonia dertonensis was erected as a subspecies many years ago, in the pre-SEM time. Of course, it is a species, not a subspecies. And the original description lacks an important detail, that is the presence of a little spine in the posteroventral region". However. B. brunensis does in fact have a spine much more pronounced than in B. dertonensis. it also differs in having smaller diameter pits, as well as different muscle scars and their manifestation on the external side of the valve. B. dertonensis has its eye tubercle formed in another way and the valves are sharply inclined down to a short ventrolateral rib.
Sexual dimorphism has not been definitely proved in the small quantity of material.
Distribution: Known only from the type locality.
Explanation of Plate 15, 136
Fig. 1, cf? RV, int. lat. (MM VI-13-1/7, 528pm long); fig. 2, 9? LV, ext. lat., detail of eye tubercle (MM VI-13-1/4, 490pm long); fig.
3, Cf? RV, ext. lat. (MM VI-13-1/6, 522pm long).
Scale A (100pm; x!50), figs. 1, 3; scale B (50pm; x260), fig. 2.
Stereo- Atlas of Ostracod Shells 15, 134
Buntonia brunensis (2 of 4)
Stereo-Atlas of Ostracod Shells 15, 136
Butonia brunensis (4 of 4)
Stereo-Atlas of Ostracod Shells 15 (29) 137-142 ( 1988) Jaanussonia unicerata (1 of 6)
595.337 (113.313) (430.1: 161.008.54) + 485 : 161.018.57) : 551.351 + 552.55.
ON JAANUSSONIA UNICERATA SCHALLREUTER
by Jean Vannier
( University of Leicester , England)
Genus JAANUSSONIA Schallreuter, 1971
1971 Jaanussonia gen. nov.; R. E. L. Schallreuter, N. Jb. Geol. Paldont. Mh Jg. 1971, 4, 255.
1986 Jaanussonia; R. E. L. Schallreuter in: von Hacht, U. ( e d . ) , Ostrakoden aus Ojlemyrflint Geschieben von Sylt in Fossilien von Sylt II, 14, Hamburg.
Diagnosis: Small (adults < 700)um long), asymmetric, non-sulcate ostracodes. Amplete to postplete outline.
Carapace rounded to ovate in lateral view. Ratio of valve length: height = 1.3- 1.7. Long (approx. 0.7 length) straight dorsal margin. Curved, faint 'sulcament' (sensu Schallreuter. Palaeontogra- phica A, 144 1973) may occur on dorsal inner surface. Posterodorsal hollow spine on left valves only. Right over left overlap. Lateral surface smooth to locally densely punctate. (Modified after Schallreuter 1971; op. cit., 255).
Remarks: Jaanussonia is closest to Kayina Harris, 1957, Hemiaechminoides Morris & Hill, 1952 and Hemeaschmidtella
Schallreuter, 1971. The main features in common are a dorsal/posterodorsal asymmetry (involving umbonate sculpture, knob or spine) and a right over left ventral overlap. These four genera form the family Jaanussoniidae Schallreuter, 1971.
Schallreuter (1971, op. cit.) implicitly considers jaanussoniids as paraparchitaceans on the basis of a possible reversal of overlap, on the supposed occurrence of a calcified inner lamella and on external sexual dimorphism. However, no such morphological features appear to exist in typical jaanussoniids. Also
Explanation of Plate 15. 138
Figs. 1, 2, 4, LV (GPIMH 3420, 518/um long): fig. 1, ext. lat . ; fig. 2, ext. dors.; fig. 4. ext. vent. obi. Figs. 3, 5. 6, LV (GPIM-G 27/E 521p,m long): fig. 3, detail ventral margin, int. lat. obi.; fig. 5. detail dorsal margin, ext. ant. obi.; fig. 6, detail ventral margin, ext. ant. obi.
Scale A (100/zm; X 140), figs. 1, 2, 4; scale B (50/u.m: x 320), fig. 3; scale C (50/zm; x480), figs. 5, 6.
Stereo-Atlas of Ostracod Shells 15, 139 Jaanussonia unicerata (3 of 6)
Remarks (cont.): according to Schallreuter, Barsella Shishkinskaja. 1964 (in: Biostratigrafija neftegazonosnych oblastej SSSR
[ Paleontologija i biostratigrafija paleozojskich otlozenij neftegazonosnych oblastej SSSR/, 105-140, Moscow) from the Devonian of the Russian Platform, is very similar to Jaanussonia and Hemiaechminoides. However, its distinctive ‘kloedenellid-type' dimorphic features distinguish it from jaanussoniids.
New S.E.M. observations on well preserved Ordovician Baltic ostracodes extracted from cherts and cherty limestones by hydrofluoric acid (R. Schallreuter’s collections. University of Hamburg), demonstrate that no inner lamella comparable to that of Palaeozoic (e.g. Schallreuter in: Kristie (ed.), Proc. 7th. Inter. Symposium on Ostracodes , Serbian Geol. Soc., Beograd 1979) or Recent podocopes occurs in jaanussoniids as defined in the present paper. Furthermore, simple right over left ventral overlap seems to be a common characteristic of all jaanussoniids. The only example (Schallreuter 1971, op. cit.) of a reversal of overlap, in Kayina hybosa (Harris, 1957) (see R. W. Harris. Bull. Oklahoma Geol. Surv. 75. 160. pi. 3, fig. 11, 1957) is dubious. Current studies on Harris' Ordovician material (M. Williams, pers. com.) indicate that ventral overlap conditions of Kayina hybosa are apparently identical to those of all jaanussoniids.
Most jaanussoniids (middle Ordovician to (?) late Palaeozoic) are more probably related to leiocopes rather than to podocopes such as the superfamily Paraparchitacea (see I. G. Sohn, U.S. Geol. Surv. Prof. Pap., 711-A, 1971). Typical leiocopes (Vannier in prep.) are small-sized, non-sulcate, non-dimorphic and exhibit a left valve (ventral) asymmetry (e.g. Brevidorsa Neckaja, 1966; see Text-fig. 1 herein and Schallreuter, in: Fossilien von Sylt II. von Hacht, U. (ed.), Hamburg, pi. 5. fig. 9, 1986) and a remarkably constant right over left overlap. Moreover, they lack a distinct calcified inner lamella. All these fundamental internal and external features are found in most jaanussoniids.
Feiocope valves are typically like two more or less elongate domes joined at a short dorsal margin; their evenly convex external surfaces lack any lobal or sulcal features. These morphological characteristics and their small size generally distinguish leiocopes from other Palaeozoic ostracodes. However, an extremely simple ‘architectural type’ of the carapace (see R. Benson, Ann. Rev. Earth Planet. Sci., 9, 1981) also occurs in other taxonomic groups (e.g. late Palaeozoic paraparchitaceans; see discussion above). Obsolescence of lobal/sulcal sculpture in binodicopes (e.g. Vogdesella; see Vannier, Palaeontographica A, 193, 1986) or reduction of dimorphic brood-care features (e.g. Ochescapha ; R. Schallreuter in prep.) are responsible for numerous other examples of homeomorphic species. Dome-like thin-walled carapaces are also common
Explanation of Plate 15, 140
Fig. 1, FV (GPIM-G 27/1, 521/zm long), int. lat. Figs. 2-5, car. (GPIM-G 27/2; FV, 442/um long): fig. 2, detail of external overlap conditions, ventral margin, ext. ant. obi.; fig. 3, ext. lat. (FV); fig. 4, ext. dors.; fig. 5, ext. vent.
Scale A (100p.m; x 140), fig. 1; scale B (100/zm; x 155), figs. 2-5.
Stereo-Atlas of Ostracod Shells 15, 138
Jaanussonia unicerata (2 of 6)
Stereo- Atlas of Ostracod Shells 15, 140
Jaanussonia unicerata (4 of 6)
Stereo-Atlas of Ostracod Shells 15. 141 Jaanussonia unicerata (5 of 6)
Remarks (cont.): amongst fossil (e.g. Silurian cypridinids; see D. J. Siveter et al., Palaeontology , 30, 1987) and Recent myodocopid ostracodes (e.g. Polycope; see Hasan. Stereo-Atlas Ostracod Shells, 10, 63-66, 1983). According to Benson (op. cit.), a dome-like carapace represents the most economical and efficient design to carry uniform mechanical stresses. This architectural design is common to active swimmers (e.g. pelagic myodocopid ostracodes), burrowers or interstitial dwellers (e.g. some Recent podocope ostracodes). Dome-like carapaces have a very low' potential for positional stability on the water-sediment interface and therefore, are rarely found in true benthic forms. Consequently leiocopes such as typical dome-shaped thin-walled aparchitids ( Brevidorsa , Text-fig. 1) might be interpreted as swimming forms or possible burrowing forms (e.g. strongly asymmetrical jaanussoniids like Jaanussonia: Text-fig. 1).
Jaanussonia unicerata Schallreuter, 1971
1971 Jaanussonia unicerata sp. nov. R. E. L. Schallreuter. N. Jh. Geol. Pdlaont. Mh. Jg. 1971, 4, 256, fig. 4.
1986 Jaanussonia unicerata Schallreuter: R. E. L. Schallreuter. Ostrakoden a us Ojlemyrflint-Geschieben von Sylt, op. cit.. pi. 6, fig. 9.
Holotype: Type locality: Figured specimens:
Diagnosis:
Remarks:
Geologisch-Palaontologisches Institut und Museum, University of Hamburg (GPIMH), German Federal Republic, no. GP1M-G 29/4. LV.
Norderstrand Visbv. Isle of Gotland. Baltic Sea. Sweden; lat. 57° 40'N. long. 18° 18'30"E. Ojlemyrflint erratic boulder (no. G2: Schallreuter coll.), upper part of Harjuan 'Series', upper Ordovician. Geologisch-Palaontologisches Institut und Museum, University of Hamburg, nos. GPIMH 3420 (LV: PI. 15. 138, figs. 1, 2. 4), GPIM-G 27/1 (LV: PI. 15, 138, figs. 3, 5, 6; PI. 15, 140, fig. 1) and GPIMH 27/2 (carapace: PI. 15. 140, figs. 2-5). GPIM-G 27/1 and GPIM-G 27/2 are from the Isle of Karlso, Sweden: lat. 57° 18'N. long. 18° 8'E; Ojlemyrflint erratic boulder (no. G30; Schallreuter coll.), upper part of Harjuan 'Series’, upper Ordovician. GPIMH 3420 is from the Isle of Sylt, North Sea, German Federal Republic; lat. 54° 56’N, long. 8° 21'E; Ojlemyrflint erratic boulder (Sy 60; Schallreuter coll.). Upper Harjuan 'Series', upper Ordovician.
Adults < 640/i.m long. Rounded carapace, postplete in outline. Ratio valve of length: height = 1.3- 1.5. Well defined straight dorsal margin. 'Sulcament' (sensu Schallreuter, 1973, op. cit. ) faintly expressed internally as a curved dorsal partition. Strong ventral right-over-left overlap. Valve separation straight in dorsal and ventral view. Prominent curved spine located in posterior cardinal area of left valves only, projecting backwards and overreaching dorsal margin.
For a full description of this species see Schallreuter 1971 (op. cit.) Jaanussonia unicerata shares many morphological features with Jaanussonia valdari Schallreuter, 1984 (Geol. For. Stockholm
Stereo-Atlas of Ostracod Shells 15, 142
Jaanussonia unicerata (6 of 6)
Remarks (cont.): Forh. 106, fig. 4B) and Jaanussonia rossica (Neckaja, 1966). However, it has a low length:height
ratio compared to that of ./. valdari from the middle Ordovician of Sweden and a much more prominent posterodorsal spine than in J. valdari or ./. rossica from the middle Ordovician of Lithuania (see Neckaja, Tr. VNIGRI, 251 1966).
Distribution: Erratic boulders from the Baltic region: Ojlemyrflint boulders from the Isles of Gotland (Sweden) and Sylt
(German Federal Republic). Harjuan 'Series', upper Ordovician.
Acknowledgements: To Roger Schallreuter, the Humboldt Foundation (Bonn) for my Research Fellowship at Hamburg University; to David Siveter (University of Leicester) and the Royal Society.
1975) (E-H). A.E: external lateral views of a left valve; B, F: internal lateral views of a left valve; C,G: schematic cross-sections of the ventral margin; D,H: reconstruction of ostracode in inferred life attitude with protruding frontal appendages.
Stereo-Atlas of Ostracod Shells 15 (30) 143-146 (1988) Hemicytherura tricarinata (1 of 4)
595.337.14 (119.9) (520:161.133.34) : 551.351
ON HEMICYTHERURA TRICARINATA HANAI
by David J. Horne & Ichiro Okubo (Thames Polytechnic, England & Shujitsu Joshi University, Japan)
Hemicytherura tricarinata Hanai, 1957
1957 Hemicytherura tricarinata sp. nov. T. Hanai, J. Fac. Sci. Tokyo Univ., (2), 11, 25,26, pi. 2, figs. 3a, b.
1980 Hemicytherura tricarinata Hanai; I. Okubo, Pubis Seto mar. biol. Lab., 25, 16-18, figs, le, f, 2i — 1, 6a-k.
1982 Hemicytherura tricarinata Hanai; Y. Hou etal., Cretaceous-Quaternary Ostracode Fauna from Jiangsu, 176, 177, pi. 74, fig. 18, text-figs. 38a, b. Geological Publishing House. Beijing.
University of Tokyo, UMUT-CA-2621, $ car. Figured Hanai 1957, pi. 2, fig. 3a.
[Paratype, UMUT-CA-2622, 9 car. Figured Hanai 1957, pi. 2, fig. 3b.]
About 1 km NE of Akase railroad station, near Hiraiwa, Uto-shi, Kumamoto Prefecture. Japan (approx, lat. 32°40'N, long. 130°31'E); beach sand. Recent.
National Science Museum, Tokyo no. NSMT-Cr 9369 (cf copulatory appendage; Text-fig. lb). British Museum (Nat. Hist.) nos. 1988.318 (9; RV: PI. 15. 144, fig. 1; LV: PI. 15. 144, fig. 3), 1988.319 (cf; LV: PI. 15, 144, fig. 2; RV: PI. 15, 146, fig. 1), 1988.320 (9 car.: PI. 15, 146, fig. 2), 1988.321 (cf LV: PI. 15, 146, fig. 3). All collected alive by 1. Okubo from intertidal sand with Zostera in the Inland Sea of Seto, Japan: NSMT-Cr 9369 on 27th June, 1975 (lat. 34°31'N, long. 134°00'E), all the rest on 11th July, 1980 (lat. 34°27'N, long 133° 59'E). NSMT-Cr 9369 was previously illustrated by Okubo (op. cit., fig. 6d) under the provisional no. MO-879.
Small species of Hemicytherura with a short caudal process and without a discrete central group of fossae. Using the numerical notation of I. R. Hoskin (Revta esp. Micropaleont., 7. 91-98, 1975): fossa 1 divided by a longitudinal murus, the upper part being fused with fossa 10; 2 fused with 1 1 (see Text-fig. la). Male copulatory appendage with subtriangular processes and ejaculatory duct.
Explanation of Plate 15. 144
Fig. 1 , 9 RV, ext. lat. ( 1988.318. 360 pm long); fig. 2, cf LV, ext. lat. ( 1988.319, 310 pm long): fig. 3. 9 LV. ext. lat. (1988.318. 360 iu.m long). Scale A (100/u.m; x!90), figs. 1-3.
Holotype: Type locality: Figured specimens :
Diagnosis:
Stereo-Atlas of Ostracod Shells 15, 145 Hemicytherura tricarinata (3 of 4)
Remarks: The appendages of H. tricarinata have been fully illustrated by Okubo (op. cit.). As noted by
Hanai (op. cit.), this species closely resembles Hemicytherura quadrazea Hornibrook, 1953 (Palaeont. Bull. Wellington, 18, 61, pi. 14, figs. 219-223) from the Recent of New Zealand; the latter differs mainly in having narrow muri subdividing fossa 12 and separating fossae 1 1 from 2 and 10 from 1.
Distribution: Pleistocene to Recent of Japan and China. A marine species usually found on intertidal sand
amongst Zostera.
Text-fig. la, Generalised sketch of a 9 LV with Hoskin's (1975) numerical notation of the fossae; lb. cf copulatory appendage (NSMT-Cr 9369).
Explanation of Plate 15, 146
Fig. 1, Cf RV, ext. lat. (1988.319, 310/u.m long); fig. 2, 9 car., dors. (1988.320, 360pm long); fig. 3, cf LV, int. lat. (1988.321, 310/xm long).
Scale A (100/u.m; xl90), figs. 1-3.
Hemicytherura tricarinata (4 of 4)
Stereo- Atlas of Ostracod Shells 15, 144
Stereo-Atlas of Ostracod Shells 15, 146
Hemicytherura tricarinata (2 of 4)
Stereo-Atlas of Ostracod Shells 15 (31) 147-148 ( 1988)
General Index
Index, Volume 15, 1988 (1 of 2)
Amphiexophthalmocy there oertlii (Babinot); 69-72 ampla, Romecytheridea: 101-106 Anisocyamus bassleri (Harris); 115-122 Anisocyamus elegans (Harris); 107—114 anterocosta, Ektyphocy there: 93-96 athersuchi, Loxoconcha ; 81-84
Babinot, J. F. & Colin, J. P. , On Amphiexophthalmocythere oertlii (Babinot); 69-72 bassleri, Anisocyamus: 115-122
Becker, G., On Tricornina ( Bohemina) paragracilis (Blumenstengel) ; 29-32
Boomer, I., On Ektyphocy there anterocosta Boomer sp. nov.; 93-96
Boomer, I., On Ektyphocythere lanceolata Boomer sp. nov.; 89-92
Boomer, I. & Lord, A., On Ektyphocythere quadrata Boomer & Lord sp. nov.; 85-88
Bradleya normam (Brady); 33-36
brunensis, Buntonia: 133-136
Buntonia brunensis Riha sp. nov.; 133-136
Colin, J. P. & Babinot, J. F., On Amphiexophthalmocythere oertlii (Babinot); 69-72 cyma, Webbylla: 17-20
Cytheropteron latissimum (Norman); 127-132
Ektyphocythere anterocosta: 93-96 Ektyphocythere lanceolata Boomer sp. nov.; 89-92 Ektyphocythere quadrata Boomer & Lord sp. nov.; 85-88 elegans, Anisocyamus: 107-114
Elofsonia papillata Whatley & Mayburv sp. nov.; 73-76 Elofsonia praepusilla Mayburv & Whatley sp. nov.; 77-80
Foster, D. W. & Kaesler. R. L.. On Bradleya normani (Brady); 33-36 Guillaume, M. C., On Leptocythere psammophila Guillaume; 123-126 Hemicytherura tricarinata Hanai; 143-146
Horne, D. J. & Okubo, I., On Hemicytherura tricarinata Hanai; 143-146 Horne, D. J. & Slipper, I. J., On Quadracythere nodosa Haskins; 45-48 Horne, D. J. & Whittaker, J. E., On Cytheropteron latissimum (Norman); 127-132 hornei, Palmoconcha: 13-16
Jaanussonia unicerata Schallreuter; 137-142
Kaesler, R. L. & Foster, D. W. , On Bradleya normani (Brady); 33-36 keeni, Quadracythere: 41-44
lanceolata, Ektyphocythere: 89-92 latissimum, Cytheropteron: 127-132 Leptocythere psammophila Guillaume; 123-126
Lord, A. & Boomer, I., On Ektyphocythere quadrata Boomer & Lord sp. nov.; 85-88 Loxoconcha athersuchi Whatley & Maybury sp. nov.; 81-84 Loxoconcha pararhomboidea Whatley & Maybury sp. nov.; 9-12 Loxoconcha praepontica magna Maybury & Whatley subsp. nov.; 5-8 Loxoconcha praepontica praepontica Maybury & Whatley subsp. nov.; 1-4
Maybury, C. A. & Whatley, R. C., On Elofsonia papillata Whatley & Maybury sp. nov.; 13-16
Maybury, C. A. & Whatley, R. C.. On Elofsonia praepusilla Maybury & Whatley sp. nov.; 77-80
Maybury, C. A. & Whatley, R. C., On Loxoconcha athersuchi Whatley & Maybury sp. nov.; 81-84
Maybury, C. A. & Whatley, R. C., On Loxoconcha pararhomboidea Whatley & Maybury sp. nov.; 9-12
Maybury, C. A. & Whatley, R. C., On Loxoconcha praepontica magna Maybury & Whatley subsp. nov.; 5-8
Maybury, C. A. & Whatley, R. C., On Loxoconcha praepontica praepontica Maybury & Whatley subsp. nov.; 1-4
Maybury, C. A. & Whatley, R. C., On Palmoconcha hornei Maybury & Whatley sp. nov.; 13-16
nodosa, Quadracythere: 45-48 normani, Bradleya: 33-36
oertlii,, Amphiexophthalmocythere: 69-72
Okubo, I. & Horne, D. J., On Hemicytherura tricarinata Hanai; 143-146 ornatoreticulata, Reticulocosta: 37-40
Palmoconcha hornei Maybury & Whatley sp. nov.; 13-16
papillata, Elofsonia: 73-76
paragracilis, Tricornina (Bohemina): 29-32
pararhomboidea, Loxoconcha: 9-12
piformis, Pilla ; 25-28
Pilla piformis Schallreuter & Siveter gen. et sp. nov.; 25-28 praepontica magna, Loxoconcha: 5-8 praepontica praepontica, Loxoconcha: 1-4 praepusilla, Elofsonia: 77-80 psammophila, Leptocythere: 123-126
Quadracythere keeni Slipper sp. nov.; 41-44 Quadracythere nodosa Haskins; 45-48 quadrata, Ektyphocythere: 85-88
reticulata, Webbylla: 21-24
Reticulocosta ornatoreticulata (Reyment); 37-40
Reyment, R., On Reticulocosta ornatoreticulata (Reyment); 37-40
Riha, J., On Buntonia brunensis Riha sp. nov.; 133-136
Romecytheridea ampla Wouters sp. nov.; 101-106
Romecytheridea tenuisculpta (Rome); 97-100
Schallreuter, R. E. L. & Siveter, D. J., On Pilla piformis Schallreuter & Siveter gen. et sp. nov.; 25-28
Schallreuter, R. E. L. & Siveter, D. J., On Webbylla cyma Schallreuter & Siveter gen. et sp. nov.; 17-20
Schallreuter, R. E. L. & Siveter, D. J., On Webbylla reticulata Schallreuter & Siveter sp. nov.; 21-24
Stereo-Atlas of Ostracod Shells 15, 31 Index, Volume 15, 198H( 2of2)
Siveter, D. J. & Schallreuter, R. E. L., On Pilla piformis Schallreuter & Siveter gen. et sp. nov.; 25-28
Siveter, D. J. & Schallreuter, R. E. L., On Webbylla cyma Schallreuter & Siveter gen. et sp. nov.; 17-20
Siveter, D. J. & Schallreuter, R. E. L., On Webbylla reticulata Schallreuter & Siveter sp. nov.; 21-24
Siveter, D. J. & Williams, M., On Anisocyamus bassleri (Harris); 115-122
Siveter, D. J. & Williams, M., On Anisocyamus elegans (Harris); 107-114
Slipper, I. J., On Quadracythere keeni Slipper sp. nov.; 41-44
Slipper, 1. J. & Horne, D. J., On Quadracythere nodosa Haskins; 45-48
tenuisculpta, Romecytheridea ; 97-100
Timberlake, S., On Timiriaseva triangularis Timberlake sp. nov.; 57-68 Timberlake, S., On Timiriasevia uptoni Timberlake sp. nov.; 49-56 Timiriasevia triangularis Timberlake sp. nov.; 57-68 Timiriasevia uptoni Timberlake sp. nov. ; 49-56 triangularis, Timiriasevia ; 57-68 tricarinata, Hemicytherura: 143-146
Tricornina (Bohemina) paragracilis (Blumenstengel) ; 29-32
unicerata, Jaanussonia: 137-142 uptoni, Timiriasevia ; 49-56
Vannier, J., On Jaanussonia unicerata Schallreuter; 137-142
Webbylla cyma Schallreuter & Siveter gen. et sp. nov.; 17-20 Webbylla reticulata Schallreuter & Siveter sp. nov.; 21-24
Whatiev, R. C. & Maybury, C. A., On Elofsonia papillata Whatley & Maybury sp. nov.; 15-lb
Whatley, R. C. & Maybury, C. A., On Elofsonia praepusilla Maybury & Whatley sp. nov.; 77-80
Whatley, R. C. & Maybury, C. A., On Loxoconcha athersuchi Whatley & Maybury sp. nov.; 81-84
Whatley, R. C. & Maybury, C. A., On Loxoconcha pararhomboidea Whatley & Maybury sp. nov.; 9-12
Whatley, R. C. & Maybury, C. A., On Loxoconcha praepontica magna Maybury & Whatley subsp. nov.; 5-8
Whatley, R. C. & Maybury, C. A., On Loxoconcha praepontica praepontica Maybury & Whatley subsp. nov.; 1-4
Whatley, R. C. & Maybury, C. A., On Palmoconcha hornei Maybury & Whatley sp. nov.; 13-16
Whittaker, J. E. & Horne, D. J., On Cytheropteron latissimum (Norman); 127-132
Williams, M. & Siveter, D. J., On Anisocyamus bassleri (Harris); 115-122
Williams, M. & Siveter, D. J., On Anisocyamus elegans (Harris); 107-114
Wouters, K., On Romecytheridea ampla Wouters sp. nov.; 101-106
Wouters, K., On Romecytheridea tenuisculpta (Rome); 97-100
Index; Geological Horizon
See 1 (2) 5-22 (1973) for explanation of the Schedules in the Efniversal Decimal Classification
|
(113.312) |
Middle Ordovician: Anisocyamus bassleri ; 115-122 |
(118.14) |
Eocene: Quadracythere nodosa', 45-48 |
|
Anisocyamus elegans', 107-114 |
(118.15) |
Oligocene : |
|
|
(113.313) |
Upper Ordovician; |
Quadracythere keeni', 41-44 |
|
|
Jannussonia unicerata', 137-142 Pilla piformis', 25-28 |
(118.21) |
Miocene: Buntonia brunensis; 133-136 |
|
|
Webbylla cyma', 17-20 Webbylla reticulata', 21-24 |
(118.22) |
Pliocene : Elofsonia papillata', 15-lb |
|
|
(113.4) |
Devonian : Tricornina (Bohemina) paragracilis', 29-32 |
Elofsonia praepusilla', 77—80 Loxoconcha athersuchi', 81-84 |
|
|
(116.21) |
Liassic: Ektyphocythere anterocosta: 93-96 Ektyphocythere lanceolata ; 89-92 Ektyphocythere quadrata; 85-88 |
Loxoconcha pararhomboidea', 9-12 Loxoconcha praepontica magna ; 5-8 Loxoconcha praepontica praepontica ; 1-4 Palmoconcha hornei ; 13-16 |
|
|
(116.222) |
Bathonian : Timiriasevia triangularis', 57-68 Timiriasevia uptoni', 49-56 |
(119.9) |
Recent : Bradley a normani: 33-36 Cytheropteron latissimum', 127-132 |
|
(116.331) |
Cenomanian : Amphiexophthalmocy there oertlii', 69-72 |
Hemicytherura tricarinata', 143-146 Leptocythere psammophila: 123-126 |
|
|
(118.13) |
Palaeocene; Reticulocosta ornatoreticulata; 37-40 |
Romecytheridea ampla: 101-106 Romecytheridea tenuisculpta', 97-100 |
Index; Geographical Location
See 1 (2) 5-22 (1973) for explanation of the Schedules in the Universal Decimal Classification
|
(261.26) |
North Sea: Cytheropteron latissimum ; 127-132 |
(44) |
France: Amphiexophthalmocythere oertlii ; 69- |
|
(265.1) |
South-East Pacific: Bradleya normani', 33-36 |
Elofsonia praepusilla: 77-80 Leptocythere psammophila: 123—126 |
|
|
(411) |
Scotland ; Cytheropteron latissimum', 127-132 |
Loxoconcha athersuchi ; 81-84 Loxoconcha praepontica praepontica : |
|
|
(420) |
England: |
Palmoconcha hornei ; 13-16 |
|
|
Ektyphocythere anterocosta: 93-96 Ektyphocythere quadrata', 85-88 |
(485) |
Sweden : Jaanussonia unicerata: 137-142 |
|
|
Elofsonia papillata', 15-lb Elofsonia praepusilla', 77-80 |
(520) |
Japan : Hemicytherura tricarinata: 143-146 |
|
|
Loxoconcha athersuchi ; 81-84 Loxoconcha pararhomboidea ; 9-12 |
(669) |
Nigeria: Reticulocosta ornatoreticulata: 37-40 |
|
|
Loxoconcha praepontica magna', 5-8 Quadracythere keeni', 41-44 Timiriasevia triangularis', 57-68 |
(675) |
Zaire: Romecytheridea ampla: 101-106 Romecytheridea tenuisculpta: 97-100 |
|
|
Timiriasevia uptoni', 49-56 |
(766) |
Oklahoma: |
|
|
(429) |
Wales: Ektyphocythere lanceolata', 89-92 |
Anisocyamus bassleri: 115-122 Anisocyamus elegans: 107-114 |
|
|
(430.1) |
German Federal Republic; Jaanussonia unicerata', 137-142 Tricornina ( Bohemina ) paragracilis', 29-32 |
(944) |
New South Wales: Pilla piformis: 25-28 Webby Ilia cyma: 17-20 |
|
(437) |
Czechoslovakia: Buntonia brunensis', 133-136 |
Webbylla reticulata: 21-24 |
Stereo-Atlas of Ostracod Shells: Vol. 15, Part 2
CONTENTS
15 (16) 73- 76
15 (17) 77- 80
15 (18) 81- 84
15 (19) 85- 88
15 (20) 89- 92 15 (21) 93- 96 15 (22) 97-100 15 (23) 101-106 15 (24) 107-114 15 (25) 115-122 15 (26) 123-126 15 (27) 127-132 15 (28) 133-136 15 (29) 137-142 15 (30) 143-146 15 (31) 147-148
On Elofsonia papillata Whatley & Maybury sp. nov. ; by R. C. Whatley & C. A. Maybury
On Elofsonia praepusilla Maybury & Whatley sp. nov.; by C. A. Maybury & R. C. Whatley
On Loxoconcha athersuchi Whatley & Maybury sp. nov. ; by R. C. Whatley & C. A. Maybury
On Ektyphocythere quadrata Boomer & Lord sp. nov.; by I. Boomer & A. Lord
On Ektyphocythere lanceolcita Boomer sp. nov.; by I. Boomer On Ektyphocythere anterocosta Boomer sp. nov.; by I. Boomer On Romecytheridea tenuisculpta (Rome); by K. Wouters On Romecytheridea ampla Wouters sp. nov.; by K. Wouters On Anisocyamus elegans (Harris); by D. J. Siveter & M. Williams
On Anisocyamus bassleri (Harris); by D. J. Siveter & M. Williams
On Leptocythere psammophila Guillaume, 1976; by M. C. Guillaume
On Cytheropteron latissimum (Norman); by D. J. Horne & J. E. Whittaker
On Buntonia brunensis Riha sp. nov.; by J. Riha On Jaanussonia unicerata Schallreuter, 1971; by J. M. C. Vannier On Hemicytherura tricarinata Hanai; by D. J. Horne & I. Okubo Index for Volume 15, 1988
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