A Stereo-Atlas of Ostracod Shells

edited by R. H. Bate, D. J. Horne, J. W. Neale,

and David J. Siveter

Volume 11, Part 2; 30th November, 1984

Published by the British Micropalaeontological Society, London

Editors

Dr R.H. Bate, SSI (UK) Ltd., Tannery House, Tannery Lane, Send, Woking, Surrey GU23 7EF.
Prof. J.W. Neale, Department of Geology, The University, Hull HU6 7RH.

Dr D.J. Horne, Department of Geology, City of London Polytechnic, Walburgh House, Bigland Street,
London El 2NG.

Dr David J. Siveter, Department of Geology, The University, Leicester LEI 7RH.

Editorial Board

Dr G. Bonaduce, Stazione Zoologica, 80121 Napoli, Italy.

Dr J.-P. Colin, Esso Production Research - European, 213 Cours Victor Hugo, 33321 Begles,
France.

Dr P. De Deckker, Research School of Pacific Studies, Australian National University, PO Box 4,
Canberra ACT 2600, Australia.

Dr D. van Harten, Universiteit van Amsterdam, Geologisch Instituut, Nieuwe Prinsengracht 130,
Amsterdam, The Netherlands.

Dr I. Purper, Departamento de Paleontologia e Estratigrafia, UFRGS, 90 000 Porto Alegre RS, Brazil.
Dr R.E.L. Schallreuter, Universitat Hamburg, Geologisch-Palaontologisches Institut, Bundesstrasse 55,
D 2000 Hamburg 13, West Germany.

Officers of the British Micropalaeontological Society

Chairman Dr R.H. Bate, SSI (UK) Ltd., Tannery House, Tannery Lane, Send, Woking, Surrey
GU23 7EF.

Secretary Dr P.P.E. Weaver, Institute of Oceanographic Sciences, Brook Road, Wormley, Godaiming,
Surrey GU8 5UB. Tel: 042-879 4141.

Treasurer Dr J.E. Whittaker, Department of Palaeontology, British Museum (Natural History),
Cromwell Road, London SW7 5BD. Tel: 01-589 6323.

Journal Editor Dr. L.M. Sheppard, SSI (U.K.) Limited, Tannery House., Tannery Lane, Send, Woking,
Surrey GU23 7EF.

Newsletter Editor Dr R.L. Austin, Department of Geology, The University, Southampton S09 5NH.
Tel: (0703) 559122/557941

Conodont Group Chairman Dr R.L. Austin, Department of Geology, The University, Southampton
S09 5NH.

Secretary Dr H. A. Armstrong, Department of Geology, The University, Newcastle-upon-Tyne NE1 7RU.
Tel: (0632) 328511.

Foraminifera Group Chairman Dr M.D. Brasier, Department of Geology, University of Hull, Hull HU6 7RX.
Secretary Dr J.V. Weston, SSI (UK) Ltd., Tannery House, Tannery Lane, Send, Woking GU23 7EF.
Tel: (0483) 223902.

Microplankton Group Chairman Dr G.C. Wilkinson, Britoil, 150 St. Vincent Street, Glasgow G2 5LJ.
Secretary Dr S.G. Molyneux, British Geological Survey, Ring Road, Halton, Leeds LS15 8TQ. Tel: (0532)
605343.

Ostracod Group Chairman Dr J. Athersuch, B.P. Research Centre, Chertsey Road, Sunbury-on-Thames,
Middlesex TW16 7LN.

Secretary Mr. I.P. Wilkinson, British Geological Survey, Nicker Hill, Keyworth, Nottingham NG12 5GG.
Tel: (06077) 6111.

Palynology Group Chairman Dr M.C. Boulter, Palynology Research Unit, N.E. London Polytechnic,
Romford Road, London E15 4LZ.

Secretary Mr N. Hooker, Britoil, 150 St. Vincent Street, Glasgow G2 5LJ. Tel: 041-204 2525.
Calcareous Nannofossil Group Chairman Dr M.K.E. Cooper, SSI (UK) Ltd., Tannery House, Tannery
Lane, Send, Woking GU23 7EF.

Secretary Miss H. Stowe, Micropalaeontology Unit, University College, Gower Street, London WC1E 6BT.
Tel: 01-387 7050.

Instructions to Authors

Contributions illustrated by scanning electron micrographs of Ostracoda in stereo-pairs are invited.
Format should follow the style set by the majority of papers in this issue. Descriptive matter apart
from illustrations should be cut to a minimum; preferably each plate should be accompanied by one
page of text only. Blanks to aid in mounting figures for plates may be obtained from any one of the
Editors or Editorial Board. Completed papers should be sent to Dr David J. Siveter.

The front cover shows a female left valve of Hemicythere villosa (Sars, 1866)

Printed in the T 1 1C hv TIP's Rlarknnnl Ltd Stanlpv Road Blackpool

A Stereo-Atlas of Ostracod Shells

edited by R. H. Bate, D. J. Horne, J. W. Neale,

and David J. Siveter

Volume 11, 1984

Part 1 (pp. 1-74); 29th June, 1984
Part 2 (pp. 75-150); 30th November, 1984

Published by the British Micropalaeontological Society, London

Stereo-Atlas of Ostracod Shells 11, ii

Contents

1 On Hippula (Cetona) turns (Schallreuter); by R. E. L. Schallreuter

2 On Schallreuteria (Lippea) lippensis Schallreuter subgen. et sp. nov. ; by R. E. L. Schallreuter

3 On Duringia spinosa (Kniipfer); by R. E. L. Schallreuter

4 On Duringia triformosa Jones sp. nov.; by C. R. Jones

5 On Hamanella implexa Finger; by K. L. Finger

6 On Sagmatocythere paracercinata Whatley & Maybury sp. nov.; by R. C. Whatley &

C. Maybury

7 On Sagmatocythere pseudomultifora Maybury & Whatley sp. nov.; by C. Maybury & R. C.

Whatley

8 On Cytheridea (Cytheridea) muelleri muelleri (v. Munster); by R. H. Weiss

9 On Cytheridea ( Cytheridea ) muelleri toenisbergensis Weiss; by R. H. Weiss

10 On Cytheridea ( Cytheridea ) pernota Oertli & Keij; by R. H. Weiss

11 On Paracytheridea cuneiformis (Brady); by J. Athersuch & D. J. Horne

12 On Atjehalla kingmai Keij; by M. Hasan

13 On Cytherelloidea bonanzaensis Keij; by M. Hasan

14 On Ogmoconcha eocontractula Park sp. nov.; by Se-Moon Park

15 On Donmacythere damottae (Colin); by J. P. Colin

16 On Leocytheridea polled Keen gen. et sp. nov.; by M. C. Keen

17 On Archeocosta alkazwinii Al-Bashir & Keen gen. et sp. nov.; by J. M. T. Al-Bashir & M. C.

Keen

18 On Shuleridea (Aequacytheridea) oculata Moos; by R. H. Weiss

19 On Loxoconcha multiornata Bate & Gurney; by A. A. F. Al-Furaih

20 On Loxoconcha undulata Al-Furaih sp. nov.; by A. A. F. Al-Furaih

21 On Loxoconcha amygdalanux Bate & Gurney; by A. A. F. Al-Furaih

22 On Raimbautina hammanni Vannier gen. et sp. nov.; by J Vannier

23 On Thibautina rorei Vannier gen. et sp. nov.; by J. Vannier

24 On Platybolbina runica Schallreuter & Kruta sp. nov.; by R. E. L. Schallreuter & M. Kruta

25 On Piretopsis (Cerninella) bohemica (Barrande); by R. E. L. Schallreuter, D. J. Siveter &

M. Kruta

26 On Bairdoppilata kalakotensis Singh & Tewari; by J. W. Neale & P. Singh

27 On Bairdia beraguaensis Singh & Tewari; by P. Singh

28 On Bairdia kalakotensis Singh & Tewari; by P. Singh

29 Index for Volume 11, 1984

Contents

1

5

9

13

17

15

25

29

37

45

53

59

63

67

71

75

83

91

99

103

107

111

119

123

127

137

141

145

149

Stereo-Atlas of Ostracod Shells 11 (16) 75-82 (1984) Leocytheridea polled (1 of 8)

595.337.14 (118.715) (664 : 162.014.08) : 551.35

ON LEOCYTHERIDEA POLLETI KEEN gen. et sp. nov.

by M. C. Keen

(University of Glasgow, Scotland)

Genus LEOCYTHERIDEA gen. nov.

Type-species: Leocytheridea polled sp. nov.

Latin Leo , lion, referring to the “mountains of the Lion”, the origin of the name Sierra Leone.
Ovate lateral outline, left valve larger than right, males more elongate than females; surface smooth
or pitted with prominent sieve-type normal pore canals; hinge antimerodont; inner margin broad
and irregular, with a prominent anterior indentation, small anterior vestibule, and long sinuous radial
pore canals; central muscle scars consist of vertical row of four scars with a single frontal scar.
The inner margin and the sinuous radial pore canals are very similar to those of Cytheretta, but the
hinge is entirely different. The hinge is somewhat similar to many genera of the Cytherideinae, such
as Clithrocytheridea, and in general lateral outline the valves are similar to such genera as
Cyamocytheridea, Clithrocytheridea, and Ovocytheridea. The anterior vestibule is similar to that of
Cyamocytheridea. The hinge is similar to that of Hemikrithe, which also has an irregular inner
margin ; Hemikrithe differs in lateral outline, central muscle scars, and type of radial pore canals.
Some species of Parakrithe have a similar appearance, but differ in the hinge and type of radial pore
canals.

Explanation of Plate 11, 76

Figs. 1, 3, 9 LV (OS 12287, 680/a.m long): fig. 1 ext. lat. ; fig. 3 normal pore canal with sieve-plate destroyed; fig. 2, 6 LV, ext. lat.

(specimen destroyed, 700/u.m long); fig. 4, 6 RV (OS 12289), normal pore canal with sieve-plate intact. All paratypes.

Scale A (100 /u.m; x 107); fig. 1; scale B (100/u.m; x 101), fig. 2; scale C (5/u.m; x 2500), fig. 3; scale D (5p.m; x 2000), fig. 4.

Stereo-Atlas of Ostracod Shells 11, 77 Leocytheridea polled (3 of 8)

Derivation of name:
Diagnosis:

Remarks:

Remarks (contd.): Leocytheridea is placed in the Cytherideidae on account of lateral shape and ornamentation, hinge,

and central muscle scars. The irregular inner margin and sinuous radial pore canals are different
from other members of the subfamily Cytherideinae, while the muscle scars and radial pore canals
differ from the Krithinae. There is therefore considerable doubt as to which family and subfamily the
new genus should be assigned.

Leocytheridea polled sp. nov.

Holotype:
Type locality:

Derivation of name:
Figured specimens:

Diagnosis:

British Museum (Nat. Hist.) no. OS 12288; 9 RV.

Tertiary (Oligocene?) part of the Bullom Series from borehole SLBH9 near Hastings, Sierra Leone
(Baker, C. D. & Bott, M. H. P. Overseas Geol. & Min. Resources , 8, 260-278). Holotype from
approximate depth of 110 feet; lat. 8°24'N, long. 13°06' W.

In honour of J. D. Pollet, for his geological investigations in Sierra Leone.

British Museum (Nat. Hist.) nos. OS12288 (holotype, 9 RV, SLBH9-9: PI. 11, 78, fig. 1),
OS 12287 (9 LV, SLBH9-12: PI. 11, 76, fig. 1), OS 12289 (8 RV, SLBH9-9: PI. 11, 78, figs. 2, 3),
destroyed (cJ LV, SLBH9-9: PI. 11, 76, fig. 2), OS 12290 (9 RV, SLBH9-9: PI. 11, 80, figs. 1,2,3,
4, PI. 11, 82, fig. 1), OS 12291 (9 RV, SLBH9-10: PI. 11, 82, figs. 2, 3), OS 12292 (9 LV, SLBH9-
10: PI. 11, 82, fig. 4). All specimens are from the type locality; depths of samples in borehole as
follows: SLBH9-9, 110 feet; SLBH9-10, 120 feet; SLBH9-12. 132-137 feet.

Because this is the only species known so far, see generic diagnosis.

Explanation of Plate 11, 78

Fig. 1 9 RV, ext. lat. (holotype, OS 12288, 640 /urn long); figs. 2, 3, $ RV (paratype, OS 12289, 650/ixm long): fig. 2, ext. lat.; fig. 3,
normal pore canals.

Scale A (200p.m; x 94), figs. 1, 2; scale B (20/i.m; x 930), fig. 3.

Stereo- Atlas of Ostracod Shells. 11, 78

Leocytheridea polled (4 of 8)

Stereo- Atlas of Ostracod Shells 11, 76

Leocytheridea polled (2 of 8)

T-f? ■

r*

Stereo- Atlas of Ostracod Shells 11, 79

Leocytheridea polled (5 of 8)

Text-fig. 1, 3 LV, int. lat. (OS12292, 650/rm long)

sieve plate with
large central opening

10/u.m

Text-fig. 2, Diagrammatic sketch through a
normal pore canal

Explanation of Plate 11, 80

Figs. 1-4, 3 RV (paratype OS 12290, 660/rm long): fig. 1, int. lat.; fig. 2, hinge; fig. 3, ant. hinge; fig. 4, post, hinge.
Scale A ( 100/rm ; x 89), fig. 1 ; scale B (100/rm ; x 180), fig. 2 ; scale C (50/rm ; x 350). figs. 3, 4.

Stereo-Atlas of Ostracod Shells 11, 81 Leocytheridea polled (7 of 8)

Remarks: There is variation in lateral outline, some specimens having a more arched dorsal margin than others

(cf. PI. 11, 76, fig. 2 and PI. 11, 82, fig. 4; and PI. 11, 78, fig. 1 and PI. 11, 82, fig. 1); it seems unlikely
that this character will be useful in species discrimination.

A slight hinge-ear tends to develop at the postero-dorsal angle of the left valve. The
prominent normal pore canal openings give the surface a punctate appearance. The normal pore
canals are sieve-type with a large central opening; the sieve plate is delicate and easily destroyed,
leaving a pit with a large central opening at the base. There are about 100 normal pore canals.

The hinge is basically antimerodont; the right valve anterior tooth consists of five crenulations
which become larger towards the anterior, the most anterior being quite large, bilobed, and almost
like a small tooth in its own right ; the situation is similar posteriorly, with four crenulations, the most
posterior being larger. In the right valve the median element is a very shallow crenulate groove.
Hinge of left valve is complementary.

The line of the inner margin is irregular. There is a prominent indentation in the antero-
ventral angle, with the production of a small vestibule. There are some 34 anterior radial pore canals,
arranged in three groups: the dorsal group of 14 are long, sinuous, often crossing each other, with
many false canals; the second group is developed around the antero- ventral indentation, where
there are some 15 short, straight, canals ; the third group is found along the ventral part of the antero-
ventral indentation where the canals are long and sinuous. There are some eight ventral radial pore
canals and eight posterior radial pore canals.

The central muscle scars consist of a vertical row of 4 scars with a single frontal scar ; the latter
is approximately oval with a tendency to become ‘U’-shaped or even almost to split into two.
Mandibular scars are present, the most ventral of which lies in an indentation of the ventral inner
margin.

Distribution: Known only from the type locality.

Explanation of Plate 11, 82

Fig. 1, 9 RV, int. muse. sc. (OS 12290); figs. 2, 3, 9 RV (OS 12291, 640/um long): fig. 2, ext. dors.; fig. 3, int. muse, sc.; fig. 4, 3 LV
(OS 12292, 650/xm long), lateral view in transmitted light. All paratypes.

Scale A (25^m; x 550), figs. 1, 3; scale B (100/xm; x 103), figs. 2, 4.

Stereo-Atlas of Ostracod Shells 11 (17) 83-90 (1984) Archeocosta alkazwinii (1 of 8)

595.337.14 (116.331-333.3) (567 : 161.047.30) : 551.35

ON ARCHEOCOSTA ALKAZWINII AL-BASHIR & KEEN

by J. M. T. Al-Bashir & M. C. Keen
(University of Glasgow, Scotland)

Genus ARCHEOCOSTA gen. nov.

Type-species: Archeocosta alkazwinii sp. nov.

Greek arche, beginning; referring to the first or earliest of the Costa group.

Trachyleberidinae with four longitudinal ridges, ventral ridge often indistinct on left valve; no sub-
central tubercle; reticulate ornamentation; carapace subrectangular in lateral view with prominent
anterior hinge ear in left valve, and pointed posterior end; males larger and more elongate than
females; hinge amphidont/heterodont.

Archeocosta is thought to belong to a group of costate ostracods which characterised the late
Cretaceous and Palaeogene shallow marine waters of the southern shores of Tethys. Paracosta
Siddiqui, 1971 and Paleocosta Benson, 1977 are other members of the group which are found in
West and North Africa, the Middle East, and Pakistan .Archeocosta (Cenomanian-Santonian) is
considerably older than Paracosta and Paleocosta (Maastrichtian-Oligocene) and may be ancestral
to them. These ostracods have a dorsal ridge, two median ridges, and a marginal ventral ridge;
Paracosta and Paleocosta frequently develop a short fifth ridge between the two median ridges, a
feature not seen in Archeocosta. It needs to be emphasised that the ventral ridge is very close to the
ventral margin, but it is this ridge that is continuous with the anterior and posterior marginal rims;
the lower median ridge might be confused with the normal position of the ventral ridge, and it is not
continuous with the marginal rims. Paracosta and Paleocosta differ from each other principally in the
strength of ornamentation, Paleocosta having more prominent longitudinal ridges with coarser and

Explanation of Plate 11, 84

Fig. 1, $ car., ext. rt. lat. (OS 12293, 540/xm long); fig. 2, 9 car., ext. rt. lat. (holotype, OS 12294, 630yu.m long); fig. 3, 9 car., ext. rt. lat.

(OS 12295, 620/u.m long); fig. 4, 8 car., ext. rt. lat. (OS 12299, 720/xm long).

Scale A (100/xm; x 94), fig. 1; scale B (lOO/rm; x 82), figs. 2, 3; scale C (lOO^m; x 69), fig. 4.

Stereo-Atlas of Ostracod Shells 11, 85 Archeocosta alkazwinii (3 of 8)

Remarks ( contd .): more regular intercostal reticulation. Al-Sheikhly (‘Maastrichtian-Upper Eocene Ostracoda of the

subfamily Trachyleberidinae from Iraq, Jordan and Syria’; unpublished Ph.D. thesis, Univ. of
Glasgow 1980) considered such differences to warrant subgeneric distinction only.

Archeocosta is similar to these two taxa in many details, including the presence of a short eye-
rib, two small ridges bifurcating from the posterior end of the dorsal ridge, the distribution of pore
cones, and internally the crescentic anterior tooth of the right valve. It differs in the asymmetry of the
valves, whereby the ventral ridge is always distinct in the right valve but not always easily seen in the
left; in having a shorter and less prominent ridge running from the eye-tubercle towards the sub-
central area; in frequently having two ridges running from the anterior end of the upper median
ridge; and in the absence of any clear bifurcation at the posterior end of the upper median ridge.
Internally Archeocosta differs in having a smooth hinge bar, unlike the crenulate bar of Paracosta
and Paleocosta. There is a possibility that the smooth hinge bar of Archeocosta could be due to
preservation because individual specimens of the two other genera may have smooth hinge bars on
this account, and specimens which may be conspecific with A. alkazwinii have been described by
Sayyab (‘Cretaceous Ostracoda from the Arabian Gulf Area’; unpublished Ph.D. dissertation.
State University of Iowa, 1956) with a crenulate hinge bar (seeA . alkazwinii below). Most species of
Paracosta and Paleocosta also have a narrow anterior vestibule, a feature not observed so far in
Archeocosta . Cythereis Jones, 1849 differs in having only three longitudinal ridges, a prominent sub-
central tubercle, and denticulate anterior and posterior hinge elements. Dumontina Derro, 1966
differs in outline, lacks a hinge-ear, has less prominent and a more irregular number of longitudinal
ridges, and has denticulate or lobate anterior and posterior hinge elements. Trachyleberidea Bowen,
1953 differs in having a sharply pointed posterior end, only three longitudinal ridges, and lobate
terminal hinge elements. Hazelina Moos, 1966 has only three longitudinal ridges which tend to be
thicker, the median ridge curves upwards at the posterior to join the dorsal ridge, has a subcentral
tubercle, and has lobate terminal hinge elements. Costa Neviani, 1928 differs in the presence of only
three longitudinal ridges and the frequent discontinuity of the antero - marginal rim.

Explanation of Plate 11, 86

Fig. 1, 8 car., ext. rt. lat. (OS 12303, 680/a.m long); fig. 2, 8 car., ext. rt. lat. (OS 12304, 652/rm long) ; fig. 3, 8 car., ext. It. lat. (OS 12305.

680/xm long); fig. 4, 9 car., ext. It. lat. (OS 12296, 582/rm long).

Scale A (100/a.m; x 76), figs. 1-3; scale B (lOO^m; x 88), fig. 4.

Derivation of name:
Diagnosis:

Remarks:

Archeocosta alkazwinii (2 of 8)

Stereo- Atlas of Ostracod Shells. 11, 86

Archeocosta alkazwinii (4 of 8)

Stereo-Atlas of Ostracod Shells 11, 84

Stereo-Atlast of Ostracod Shells 11, 87 Archeocosta alkazwinii (5 of 8)

Holotype:
Type locality :

Archeocosta alkazwinii sp. nov.

British Museum (Nat. Hist.) no. OS 12294; $ carapace.

South Rumaila Well-104, south eastern Iraq, lat. 30°05'E, long. 47°23'N; Khasib Formation,
Lower Coniacian, drilling depth of 2386 m.

Derivation of name:
Figured specimens:

After Zakariyy Al-Kazwini, a famous thirteenth century Arab cosmologist and geographer.

Brit. Mus. (Nat. Hist.) nos. OS 12293 (9 car., depth 2386m; PI. 11, 84, fig. 1; PI. 11, 88, fig. 5),
OS 12294 (holotype, 9 car., depth, 2386 m: PI. 11, 84, fig. 2), OS 12295 (9 car., depth 2414 m: PI.
11, 84, fig. 3), OS 12299 (d car., depth 2392 m : PI. 11, 84, fig. 4), OS 12305 (<3 car., depth 2400 m :
PI. 11, 86, fig. 3), OS 12296 (6 car., depth 2412m: PI. 11, 86, fig. 4), OS 12297 (9 car., depth
2416m: PI. 11, 88, fig. 1), OS 12301 (c? car., depth 2424m: PI. 11, 88, fig. 3), OS 12310 (9 car.,
depth 2386 m: PI. 11, 88, fig. 4), OS 12309 (9 car., depth 2392 m: PI. 11, 88, fig. 6), OS 12307 (9
RV, depth 2416m: PI. 11, 90, fig. 3), OS 12308 (9 LV, depth 2414m: PI. 11, 90, fig. 4); all from the
Khasib Formation of South Rumaila Well-104. Specimens OS 12303 (d car., depth 2362 m: PI. 11,
86, fig. 1), OS 12300 (d car., depth 2348 m: PI. 11, 88, fig. 2), OS 12306 (d car., depth 2348 m: PI.
11, 90, fig. 1), and OS 12302 (d car., depth 2342 m: PI. 11, 90, fig. 2) are from the Tanuma
Formation of South Rumaila Well- 104. OS 12304 (d car., depth 4420 ft: PI. 11, 86, fig. 2) is from the
Khasib Formation of Kifl Well- 2.

Diagnosis:

Remarks:

Because this is the only species so far known, see generic diagnosis.

The dorsal ridge bears some prominent pore cones which sometimes give it a sinuous appearance ; it
bifurcates at the posterior, the lower branch being a short curved ridge ending at the “terminus”
pore cone. The upper median ridge is variable in length and prominence, and in most specimens
thickening of the anterior reticulation muri form two thin ridges running from the anterior end of the
upper median ridge towards the anterior margin. The reticulation between the two median ridges
varies in strength between specimens. The marginal ventral ridge is only clearly seen on the right

Explanation of plate 11, 88

Fig. 1, 9 car., ext. It. lat. (OS 12297, 640/um long) ; fig. 2, 6 car., ext. It. lat. (OS 12300, 720 /am long); fig. 3, <3 car., ext. It. lat. (OS 12301,
742/um long); fig. 4, 9 car., ext. vent. (OS 12310, 630/am long); fig. 5, 9 car., ext. dors. (OS 12293, 540/am long); fig. 6, 9 car., ext.
dors. (OS 12309, 630 /am long). Scale A (200 /am; x 82), figs. 1, 5; scale B (200 /am; x 72), figs. 2 — 4, 6.

Stereo-Atlas of Ostracod Shells 11, 89 Archeocosta alkazwinii (7 of 8)

Remarks (contd.):

valve of both males and females; at the posterior it is continuous with the posterior marginal rim; at
the anterior it converges towards the lower median ridge and in some specimens a branch of it is
continuous with the anterior marginal rim. The reticulation varies in strength between specimens at
both the anterior and posterior. There is no true sub-central tubercle, although some specimens
show a slight prominence where the upper median ridge bifurcates at the anterior. Eye tubercle
prominent. 6-10 anterior and 5-6 posterior denticles. Pore cores often prominent.

Internally, the marginal area is broad, there are no vestibules, the selvage is distinct. The
hinge of the right valve has a crescentic-shaped smooth anterior tooth with a higher conical dorsal
part and a lower ventral part extending below the postjacent socket, the latter being deep, smooth,
and rounded; the median groove appears to be smooth; the posterior tooth is a large hemispherical
boss; the hinge of the left valve is complementary. The muscle scars could not be observed.

A. alkazwinii is probably synonymous with ‘ Mesocythereis reticulata’ Sayyab M.S. (86-87,
pi. 3, figs. 23, 24, text-fig. 20) from the Upper Cretaceous of the Arabian Gulk, although Sayyab
describes a crenulate hinge bar and a reniform posterior tooth. Paracosta declivis Siddiqui, 1971, the
type-species of the genus from the Upper Eocene of Pakistan differs in the absence of a hinge ear and
the presence of a much longer upper median ridge. Paracosta arabica (Bassiouni, 1969) from the
Palaeocene-Eocene of N. Africa and the Middle East differs in having a more bluntly rounded
posterior margin, a weak hinge ear, and less prominent longitudinal ridges.

A alkazwinii shows considerable range in size, with females varying between 540/um and
640/um in length and males between 630/um and 750/u.m. The size distribution is continuous, with
no obvious groupings, and smaller and larger individuals may occur in the same sample (compare PI.
11, 84 fig. 1, a small form L = 540/um, with the holotype, PI. 11, 84, fig. 2, L = 630/u.m). The smaller
individuals have the same ornamentation as the larger, are heavily calcified, and have a fully
developed amphidont hinge. It is felt justified to regard them as adult and not a case of precocious
sexual dimorphism, but it is impossible to determine whether the size variation is an environmental

Distribution:

or genetic phenomenon.
Turonian to Coniacian of Iraq.

Explanation of Plate 11, 90

Fig. 1, d car., ext. It. lat. (OS 12306, 700/am long); fig. 2, 6 car., ext. It. lat. (OS 12302, 630/am long); fig. 3, 9 RV, int. lat. (OS 12307,
630/am long); fig. 4, 9 LV, int. lat. (OS 12308, 630/aiti long). Scale A (200/am; x74), fig. 1; scale B (200/am; x81), figs. 2-4.

Stereo- Atlas of Ostracod Shells 11, 90

Archeocosta alkazwinii (8 of 8)

Stereo- Atlas of Ostracod Shells 11, 88

Archeocosta alkazwinii (6 of 8)

Stereo-Atlas of Ostracod Shells 11 (18) 91-98 (1984) Schuleridea oculata (1 of 8)

595.337.14 (118.15) (430.1: 161.006.51 + 161.007.53 + 161.008.52 + 161.009.51) : 551.35 (24.08.5-20) + 552.51

ON SCHULERIDEA (AEQUACYTHERIDEA) OCULATA MOOS

by Roseline H. Weiss

(Geological Institute, University of Cologne, Germany)

Schuleridea (Aequacytheridea) oculata Moos, 1970

1894 Cytheridea perforata (Roemer); E. Lienenklaus, Z. dt. geol. Ges., 46, 225, pi. 15, fig. 5 (pars).

71958 Schuleridea perforata (Roemer); C. Ellerman, Fortschr. Geol. Rheinld. Westf., 1, 210.

71963 Aequacytheridea perforata (Roemer); van den Bold, Neues Jb. Geol. Palaont. Mh., 1963, 114.

1970 Schuleridea ( Aequacytheridea ) oculata sp. nov. B. Moos, Geol. Jb., 88, 296, pi. 29, figs. 6-12.

1975 Schuleridea (Aequacytheridea) oculata Moos; M. Faupel, Gottinger Arb. Geol. Palaont., 17, 27, pi. 8, figs. la-b.

71980 Schuleridea oculata Moos; H. Uffenorde, Neues Jb. Geol. Palaont. Mh., 1980, 119.

1981 Schuleridea (Aequacytheridea) oculta Moors; H. Uffenorde, Palaeontographica Abt. A, 172 (4-6), 142, pi. 2,
figs. 1, 4.

1983 Schuleridea (Aequacytheridea) oculata Moos; R. H. Weiss, Palaeontographica Abt. A, 182 (1-3), 50, pi. 1, figs. 1-7, pi. 2,
figs. 1-7, pi. 3, figs. 1-4, text-fig. 1.

Explanation of Plate 11, 92

Fig. 1, 3 car., ext. dors. (GIK 932-1205, 925/u.m long); fig. 2, 3 car., ext. vent. (GIK 932-1208, 938/a.m long).
Scale A (lOO^tm; x 101), figs. 1, 2.

Stereo-Atlas of Ostracod Shells 11, 93 Schuleridea oculata (3 of 8)

Holotype: Bundesanstalt fur Geowissenschaften und Rohstoffe, Hannover, Typk.-No. 6999; 9 RV.

[Paratypes: No. 6998, 9 LV, and No. 7000, 9 car.].

Type locality: Astrup near Osnabriick, West Germany. Upper Oligocene.

Figured specimens; Geological Institute, University of Cologne, nos. 932 -1201 (9 LV:P1. 11, 98, fig. 1), 932 -1202(9
LV : PI. 1 1,94, fig. 1), 932 -1202 (9 RV : PI. 11, 96, fig. 1),932 -1205 (dear.: PI. 11, 92, fig. 1), 932 -
1207 (dLV: PI. 11, 94, fig. 2), 932-1208 (dear.: PI. 11, 92, fig. 2), 932-1211 (d LV: PI. 11, 98, fig.
2), 932-1212 (d RV: PI. 11, 96, fig.2).

All specimens were collected by Prof. E. K. Kempf in 1961 at a depth of 54.2-55.5 m from
shaft Tonisberg near Krefeld, Germany (German Nat. Grid Ref.: R 34033, H 97555; long. 6° 29' E,
lat. 51° 25' N); Upper Oligocene; Sphenolithus ciperoensis zone (NP25) according to Benedek &
Muller (N. Jb. Geol. Palaont., Mh., 1974, 388); fine sand (grain size 0. 2-0. 06 mm = 92.5%)
according to Kempf (Niederrhein , 35, fig. 2, 1968) ; shallow marine (5-20 m water depth) according
to Goerlich ( Fortschr . Geol. Rheinld. Westf., 1, 220, 1958).

Explanation of Plate 11, 94

Fig. 1, 2 LV, ext. lat. (GIK 932-1202, 875 pom long.) ; fig. 2, dLV, ext. lat. (GIK 932-1207, 925 Atm long). PI. 11, 94, fig. 1 and PI. 11, 96,
fig. 1 represent both valves of a single carapace.

Scale A (IOOaoti; x 93), figs. 1, 2.

Stereo->Atlas of Ostracod Shells 1 1, 92

Schuleridea oculala (2 of 8)

Stereo- Atlas of Ostracod Shells 11, 94

Schuleridea oculata (4 of 8)

-

-

Stereo-Atlas of Ostracod Shells 11, 95

Schuleridea oculata (5 of 8)

Sex

N

X

L (/rm)
Min

Max

X

H (/Am)
Min

Max

X

L/H

Min

Max

99 RV

20

846

813

875

521

500

550

1.620

1.535

1.676

3c? RV

9

883

850

900

509

500

525

1.738

1.657

1.776

99 LV

24

885

838

925

585

550

625

1.514

1.458

1.565

c?<? LV

15

922

875

950

556

525

588

1.659

1.616

1.705

L (/Am)

W (/Am)

L/W

Sex

N

X

Min

Max

X

Min

Max

X

Min

Max

99 car.

9

897

875

925

456

450

475

1.970

1.944

2.000

86 car.

4

925

913

938

422

413

425

2.194

2.176

n n i n

a..l1l

Table 1. Measurements on specimens (N = no. of specimens; x = mean; L = length; H = height;
W = width); A = valves, B = carapaces.

Diagnosis: In the lateral view valves subtriangular, anterior end broadly rounded, posterior end narrowly

rounded ventrally. Both valves with small peripheral nodes along the anterior and posterior margins.
Left valve considerably larger than right valve, overlapping it on all sides. Surface of the valves
coarsely pitted; eye-tubercles distinct. In dorsal view carapaces subrhomboidal to elongate-
fusiform.

Explanation of Plate 11, 96

Fig. 1, $ RV, ext. lat. (GIK 932-1202, 850/Am long); fig. 2, 6 RV, int. lat. (GIK 932-1212, 875/Am long).
Scale A (100/Am; x 93), figs. 1, 2.

Stereo-Atlas of Ostracod Shells 11, 97 Schuleridea oculata (7 of 8)

Remarks: Sexual dimorphism pronounced. Shell morphotype B more elongate, lower and in dorsal view

narrower than morphotype A. As the genus Schuleridea is not yet represented by living species, it is
supposed that the males are represented by Morphotype B.

The hinge is divided into three elements in each valve. The terminal elements are dentate
plates (R V) or loculate sockets (L V) ; the median element is subdivided into three parts - proximal,
central and distal. The proximal and distal parts are smooth; the proximal part, however, being much
broader than the distal part. The central parts - a groove (RV) or a ridge (L V) - are furnished with
fine striations, and form a part of the opening mechanism (discussed in detail by Weiss 1983).

Numerous, funnel-type normal pores open on elevated parts of the shell. Marginal pore-
canals are also very numerous (approx. 60 anteriorly). They reach the outer surface distally of the
flange and their openings on the exterior surface of the shell form a zigzag line.

Line of concrescence and inner margin are very slightly separated along the anterior margin.

Distribution: Upper Oligocene: Astrup near Osnabriick, Germany (Lienenklaus 1894, Moos 1970, op. cit.) ;

Doberg near Biinde, Germany (Lienenklaus 1894, Moos 1970, op. cit.); Shaft Kapellen (Lower
Rhine Basin), Germany (Ellerman 1958, Moos 1970, op. cit.); Shaft Rossenray (Lower Rhine Basin),
Germany (van den Bold 1963); Shaft Tonisberg (Lower Rhine Basin), Germany (Weiss 1983);
Kassel, Germany (Moos 1970 op. cit.); Volpriehausen near Uslar (boring), Germany (Moos 1970,
op. cit.); Hollkopf near Glimmerode (Basin of Kassel), Germany (Faupel 1975, op. cit.); Nieder-
sachsen (borings), Germany (Uffenorde 1980, 1981, op. cit.).

Acknowledgement: Thanks are due to the Deutsche Forschungsgemeinschaft for providing the Cambridge Stereoscan

180.

Explanation of Plate 11, 98

Fig. 1 , $ LV, int. lat. (GIK 932-1201, 825 /Am long) ; fig. 2, 6 LV, int. lat. (GIK 932-12 11,913 /im long). PI. 11, 96, fig. 2 and PI. 11, 98,
fig. 2 represent both valves of a single carapace.

Scale A (100/Am; x 93), figs. 1, 2.

Stereo-Atlas of Ostracod Shells 1 1, 96 Schuleridea oculata (6 of 8)

Stereo-Atlas of Ostracod Shells 11 (19) 99-102 (1984) Loxoconcha multiornala (1 of 4)

595.337.14 (119.9) (267.8 : 161.050.26) : 551.351

ON LOXOCONCHA MULTIORNATA BATE & GURNEY

by Ali A. F. Al-Furaih
(King Saud University, Riyadh, Saudi Arabia)

Loxoconcha multiornata Bate & Gurney, 1981

1971 Loxoconcha ornatovalvae Hartmann; R. H. Bate, Bull. Centre Rech. Pau-SNPA, suppl. 5, 245, 246, 248, 250, pi. 1 , figs. Ik, 2k,
pi. 2, fig. 3k, pi. 3, figs. 2k, 3k; non L. ornatovalvae Hartmann, 1964.

1978 Loxoconcha sp.A, S. P. Jain, Bull. Ind. Geol. Assoc., 11(2), 126, fig. 5A.

1981 Loxoconcha ( Loxoconcha ) multiornata sp. nov. R. H. Bate & A. Gurney, Bull. Br. Mus. nat. Hist. (Zool.) , 41 (5), 236, 238, figs.

1 A-J, 2A.

Holotype: BM(NH) no. 1980.236, 8 carapace.

[Paratypes: nos. 1980.237-243],

Type locality: Abu Dhabi Lagoon (24° 32'N, 54° 27'E), marine, sublittoral; Recent.

Figured specimens: King Saud University coll. nos. KSU.G.OS 218 ($ RV; PI. 11, 100, fig. 1), KSU.G.OS. 219 (d RV:

PI. 11, 100, fig. 2), KSU.G.OS 220 ( 8 LV: PI. 11, 100, fig. 3), KSU.G.OS 221 (c? LV: PI. 11, 102,
figs. 1, 3), KSU.G.OS 222 (8 RV:P1. 11, 102 fig. 2). All the figured specimens are from the Jazirat
Tarut coast of the Arabian Gulf, approx, lat 26° 35°N, long. 50° 05'E; Recent, marine.

Explanation of Plate 11, 100

Fig. 1, 9 RV, ext. lat. (KSU.G.OS. 218, 460/u.m long); fig. 2, 8 RV, ext. lat. (KSU.G.OS. 219, 480/j.m long); fig. 3, 8 LV, ext. lat.
(KSU.G.OS. 220, 480/rm long).

Scale A (100/u.m; x 137), fig. 1; scale B (100/um; x 125), figs. 2, 3.

Stereo- Atlas of Ostracod Shells 11, 101 Loxoconcha multiornata (3 of 4)

Diagnosis:

Remarks:

Distribution:

A small (< 500/zm long) species of Loxoconcha with straight parallel dorsal and ventral margins.
Surface ornamentation consists of coarse, deep reticulations with tendency toward development of
irregular ribbing pattern. There is a well developed eye tubercle and strong sexual dimorphism.
The external morphology of this species somewhat resembles L. kitanipponica Ishizaki, 1971, but
differs in having a reticulate surface with irregular ribbing pattern. L. ornatovalvae Hartmann, 1964
very closely resembles L. multiornata but is differentiated by its less prominently developed dorsal
ridge. Furthermore, the two species differ in details of ornamentation, particularly in the ribbing
pattern.

L. multiornata has been found on the west coast of India (Jain, op. cit.) and in the Arabian Gulf
(Bate & Gurney, op cit., and herein).

Explanation of Plate 11, 102

Figs. 1,3, dLV (KSU.G.OS. 221, 480/um long): fig. 1 , int. lat., fig. 3, int. muse. sc.; fig. 2, 8 RV, int. lat. (KSU.G.OS. 222, 480/u.m long).
Scale A (100^m; x 140), figs. 1, 2; scale B (25/u.m; X 600), fig. 3.

Stereo-Atlas of Ostracod Shells 11, 100

Loxoconcha multiornata (2 of 4)

Stereo-Atlas of Ostracod Shells 11 (20) 103-106 (1984) Loxoconcha undulata (1 of 4)

595.337.14 (119.9) (267.8 : 161.050.26) : 551.351

on LOXOCONCHA UNDULATA AL-FURAIH sp. nov.

by Ali A. F. Al-Furaih
(King Saud University, Riyadh, Saudi Arabia)

Loxoconcha undulata sp. nov.

1971 Loxoconcha sp. C.; R. H. Bate, Bull. Centre Rech. Pau SNPA, suppl. 5, 246, 250, pi. 3, figs. 2n, 3n.

1981 Loxoconcha (Loxoconcha) indica Jain; R. H. Bate & A. Gurney, Bull. Br. Mus. nat. Hist. (Zool.), 45(5), 240, 241, figs. 5A-H;

non Loxoconcha megapora indica Jain, 1978.

Holotype:
Type locality:
Derivation of name:

Figured specimens:

King Saud University coll. KSU.G.OS. 210; $ RV.

Jazirat Tarut coast, Arabian Gulf (approx, lat. 26° 35'N, long. 50° 05'E); Recent, marine.

Latin undulatus , wavy; referring to the fancied resemblance of the anterior and posterior ornamen-
tation to a wavy sea.

King Saud University coll. nos. KSU.G.OS. 210 (holotype, $ RV: PI. 11, 104, fig. 1), KSU.G.OS.
211 (6 LV: PI. 11, 104, figs. 2, 3), KSU.G.OS. 212 ($ LV: PI. 11, 106, fig. 1), KSU.G.OS. 213 (6
RV: PI. 11, 106, figs. 2, 3). All the figured specimens are from the type locality.

Explanation of Plate 11, 104

Fig. 1, $ RV, ext. lat. (holotype, KSU.G.OS. 210,445/u.m long); figs. 2, 3, 6 LV (KSU.G.OS. 21 1, 470 /am long): fig. 2, ext. lat.; fig. 3, ext.
lat., detail showing sieve-plate.

Scale A (100^m; x 150), fig. 1; scale B (100/u.m; x 140), fig. 2; scale C (10/u.m; x 1900), fig. 3.

Stereo-Atlas of Ostracod Shells 11, 105 Loxoconcha undulata (3 of 4)

Diagnosis:

Remarks:

Distribution:

Carapace subrhomboidal in lateral view. Dorsal margin very slightly concave just posterior to the
middle. Ventral margin sinuous, concave anterior to the middle. Shell surface punctate with scat-
tered rounded sieve pores. Eye spot low but distinct.

This species was first recorded in the Arabian Gulf by Bate (1971) and described and illustrated by
Bate & Gurney (1981), but they considered it conspecific with Loxoconcha megapora indica Jain,
1978, from the west coast of India. L. indica differs in having a straight dorsal margin, less distinct
posterior cardinal angle and a much more finely punctated surface. Furthermore, L. undulata has a
more broadly convex postero-ventral margin and the eye tubercle is situated in a lower position. The
present species is somewhat similar toL. matagordensis Swain, 1955, from San Antonio Bay, Texas
coast, but differs in having a more distinct posterior cardinal angle. L . pseudovelata Stancheva, 1 964,
from the Upper Miocene of Bulgaria is very closely related species but differs in details of outline
and having reticulate surface.

L. undulata has been found at several localities in the Arabian Gulf (Bate & Gurney, op. cit., and
herein).

Explanation of Plate 11, 106

Fig. 1, 9 LV, int. lat. (KSU.G.OS. 212, 460/u.m long); figs. 2, 3, S RV (KSU.G.OS. 213, 495/u.m long): fig. 2, int. lat.; fig. 3, int. muse. sc.
Scale A (100/u.m; x 145), fig. 1; scale B (100/u.m; x 140), fig. 2; scale C (25p.m; x 440), fig. 3.

Loxoconcha undulata (4 of 4)

Stereo- Atlas of Ostracod Shells 11, 104

Loxoconcha undulata (2 of 4)

I

Stereo-Atlas of Ostracod Shells 11 (21) 107-110 (1984) Loxoconcha amygdalanux (1 of 4)

595.337.14 (119.9) (267.8 : 161.050.26) : 551.351

ON LOXOCONCHA AMYGDALANUX BATE & GURNEY

by Ali A. F. Al-Furaih
( King Saud University, Riyadh, Saudi Arabia)

Loxoconcha amygdalanux Bate & Gurney, 1981

1971 Loxoconcha sp. B.; R. H. Bate, Bull. Centre Rech. Pau-SNPA, suppl. 5, 245, 246, 248, pi. 1, fig. 2m, pi. 2, fig. 3m.

1977 Loxoconcha sp. A.; K. H. Paik, Meteor Forsch-Ergebnisse, 28, 56, 58, pi. 6, figs. 112-114.

1981 Loxoconcha (Loxoconcha) amygdalanux sp. nov., R. H. Bate & A. Gurney, Bull. Br. Mus. nat. Hist. (Zool), 41(5), 242, 243, figs.
51, J; 6A-K; 8A-C.

Holotype: BM(NH) no. 1980. 258, cJ RV.

[Paratypes: Nos: 1980. 257, 259-263, 269, 430],

Type locality: Abu Dhabi Lagoon (24° 23'N, 54° 27'E); marine, sublittoral; Recent.

Figured specimens: King Saud University coll. nos. KSU.G.OS. 214 (9 RV : PI. 11, 108, fig. 1), KSU.G.OS. 215 (c? LV:

PI. 11, 108, figs. 2, 3), KSU.G.OS. 216(9 LV: PI. 11, 110, fig. 1), KSU.G.OS. 217 (6 RV: PI. 11,
110, figs. 2, 3). All the figured specimens are from the Jazlrat Tarut coast of the Arabian Gulf,
approx, lat. 26° 35'N, long. 50° 05'E; Recent, marine.

Explanation of Plate 11, 108

Fig. 1, 9 RV, ext. lat. (KSU.G.OS. 214, 480/u.m long); figs. 2, 3, 6 LV (KSU.G.OS. 215, 500/am long): fig. 2, ext. lat.; fig. 3, ext. lat., detail
of ornament and sieve-plates.

Scale A (100/x.m; x 140), fig. 1; scale B (100 /am; x 130), fig. 2; scale C (10/am; x 970), fig. 3.

Stereo-Atlas of Ostracod Shells 11, 109 Loxoconcha amygdalanux (3 of 4)

Loxoconcha species with elongate carapace and distinct posteroventral depression. Shell surface
reticulate with concentrically arranged fossae. Fossae are coarser in the middle portion of the cara-
pace, finer towards anterior and posterodorsal.

This species is unlikely to be confused with other described species of the genus. It has a distinct out-
line and coarse ornamentation, particularly in the centre of the carapace.

This species has so far only been found in the Arabian Gulf (Bate & Gurney, op. cit. and herein) and
the Gulf of Oman (Paik, op. cit.).

Explanation of Plate 11, 110

Fig. 1, 9 LV,int. lat. (KSU.G.OS. 216, 480/u.m long); figs. 2, 3, S RV (KSU.G.OS. 217, 505/i.m long): fig. 2,int. lat.; fig. 3. int. muse. sc.
Scale A (100/u.m; x 138), fig. 1; scale B (100/xm; x 130), fig. 2; scale C (25/tm; x 633), fig. 3.

Diagnosis:

Remarks:

Distribution:

Stereo- Atlas of Ostracod Shells 11, 110

Loxoconcha amygdalanux (4 of 4)

Stereo-Atlas of Ostracod Shells 11, 108

Loxoconcha amygdalanux (2 of 4)

Stereo-Atlas of Ostracod Shells 11 (22) 11 1-118 (1984) Raimbautina hammanni (1 of 8)

595.336.13 (113.312) (44 : 162.002.47) : 551.35 + 552.52

ON RAIMBAUTINA HAMMANNI VANNIER gen. et sp. nov.

by Jean Vannier
(University of Rennes, France)

Genus RAIMBAUTINA gen. nov.

Type-species: Raimbautina hammanni sp. nov.

In honour of Raimbaut de Vaqueiras (1155-1207), french troubadour. Gender feminine.
Median-sized palaeocope; adults 1-1.3 mm long (without the posteroventral spine). Two lobal areas
(L3 + L4 & LI + L2) occur either side the main sulcus (S2) which is slightly sigmoidal. L3 is oblique
to the dorsal margin and has a well-marked swelling in its ventral part. Anterior lobal area (LI + L2)
with a distinct preadductorial node (L2). Posterior lobe (L4) is a low swelling and poorly defined.
Velum represented anteriorly by a curved, shield-like flange extended into a spine, joined to the
lobal area (ventral part of L2) by a connecting strut. Long spine, itself spinose, occurs postero-
ventrally and projects posteriorly. Laterovelar furrow well developed.

Raimbautina gen. nov. differs from all other known genera by its very distinctive posteroventral
spine and its shield-like velvar flange tapering towards the posterior and connected to the anterior
lobal area.

Raimbautina shows some morphological similarities in its velum, lobes and sulci with certain
genera belonging to the Family Ctenonotellidea Schmidt, 1941. Bilobatia (cf. Schallreuter, Stereo-
Atlas of Ostracod Shells, 9, 1982), Rakverella (cf. Schallreuter, Palaeontographica A, 153, 1976)
and Schallreuteria (cf. Siveter, Stereo-Atlas of Ostracod Shells , 9, 1982) have a velar sculpture
(female valves) comparable to that of Raimbautina. As far as lobal and sulcal morphology is con-

Explanation of Plate 11, 112

Figs. 1-3, LV (holotype, IGR 5700/A2, 1255 /um long): fig. 1, ext. lat. ; fig. 2, ext. dors, obi., fig. 3, ext. vent. obi.
Scale A (250 /xm; x 70), figs. 1-3.

Stereo-Atlas of Ostracod Shells 11, 113 Raimbautina hammanni (3 of 8)

Remarks ( contd .): cerned, Raimbautina displays both wehrliine and ctenonotelline characteristics: lobe L3 is strongly

developed and lobe L4 is poorly defined.

At present Raimbautina is monotypic and any possible dimorphism of the genus is unknown.

Derivation of name:
Diagnosis:

Remarks:

Raimbautina hammanni sp. nov.

Holotype:

Type locality:

Derivation of name:
Figured specimens:

Diagnosis:

Institut de Geologie, University of Rennes (IGR), coll. no. 5700/A2, LV.

[Paratypes: IGR coll. nos. 5700/BI, LV; 5701/A, RV; 5710/A1, LV; 30270/4, RV; 30336/1,

RV],

Siltstones and mudstones on the path leading to the farm of l'Aubaudais, Guichen, Ille-et-Vilaine,
France; lat. 47° 58' 8" N, long. 1° 44' W. Traveusot Formation, Llandeilo Series, Ordovician.

In honour of Dr. W. Hammann, University of Wurzburg, West Germany.

Institut de Geologie, University of Rennes (IGR), coll. nos. 5700/A2 (holotype, RV: PI. 11, 112,
figs. 1-3; PI. 11, 114, figs. 1, 2),' 5701/A (RV: PI. 11, 114, figs. 3-5), and 5700/BI (LV: PI. 11, 116,
figs. 1-3; PI. 11, 118, figs. 1, 2). All specimens are from the type-locality. All the figured specimens
are latex casts taken from external moulds.

As for the genus.

Explanation of Plate 11, 114

Figs. 1, 2, LV (holotype, IGR 5700/A2): fig. 1, ext. post, obi.; fig. 2, ext. ant. obi. Figs. 3-5, RV (paratype, IGR 5701/A, 955 /xm long): fig.

3, ext. lat.; fig. 4, ext. ant. obi.; fig. 5, ext. post. obi.

Scale A (250 /xm; x 70), figs. 1-5.

Stereo- Atlas of Ostracod Shells 11, 112

Raimbaulina hammanni (2 of 8)

Stereo- Atlas of Ostracod Shells 11, 114

Raimbautina hammanni (4 of 8)

Stereo-Atlas of Ostracod Shells II, 115 Raimhautinu hammanni (5 of 8)

Remarks: Front a structural point of view, the posteroventral spine and the frontal velar flange of Raimbautina

hammanni are surely not merely simple ornamental features. The function of such velar projecting
structures can be interpreted in a number of possible ways (Text-figs, la-c):

1 . The two enormously long spines on the posteroventral part of each valve may have served
as posterior supporting points when the animal was resting on the substrate with the carapace closed
(Text-Fig. 1 b). Added to the contact points of the frontal velar flanges, they would act as stabilizing
structures. The frontal velar flanges extend both ventrally and laterally outward and the two
posterior spines are projected and divergent towards the posterior. The supporting plane would be
wider when the carapace was slightly open, as in a feeding or active attitude. The fact that a strong
connection occurs between the velar flange and L2 supports this hypothesis. Such a strengthening
structure lies just above a possible contact point with the substrate. This interpretation is consistent
with a benthic mode of life.

2. The posteroventral spines (projected backwards, provided with secondary spines) suggest
a defensive function whether the animal was resting on the sea-floor in contact with its frontal
flanges, or was crawling on the substratum, or was swimming (Text-figs, la, c).

3. The posteroventral spines of Raimbautina hammanni are not hollow projections (in
contrast to the dorsal spines of genera such as Aechmina) and cannot be considered as buoyancy
organs. Nevertheless, their position might suggest that they served as lateral stabilizing structures
during swimming. Despite its unhydrodynamically-shaped carapace, an occasional swimming mode
of locomotion near the bottom may have been aided by such projecting structures (Text-fig. lc).

Distribution: In the Armorican Massif, France, Raimbautina hammanni occurs in several localities south of

Rennes (Martigne-Ferchaud synclinorium) near the type locality at Guichen, Ille-et-Vilaine. It is
also known from one locality in Normandy (Ger, Manche) and from one locality in the Laval
synclinorium at Andouille, Mayenne.

R. hammanni has also been obtained from the Iberian peninsula: from the eastern part of the
Sierra Morena, central Spain, near Corral de Calatrava (Ciudad Real district), and from the Toledo
Mountains at a locality between Puerto Rey and Puerto de San Vicente. All middle Ordovician.

Explanation of Plate 11, 116

Figs. 1-3, LV (paratype, IGR 5700/BI, 1185/am long): fig. 1, int. lat. ; fig. 2, int. ant. obi.; fig. 3, int. post. obi.

Scale A (250/u.m; x 90), figs. 1-3.

Stereo- Atlas of Ostacod Shells 11, 117 Raimbautina hammanni (7 of 8)

Text-fig. 1. Raimbautina hammanni gen. et sp. nov. Three possible life attitudes.

A-B: the ostracod is resting on the substrate (P = anterior supporting points; S = posterior supporting points). Position A
suggests an active attitude, in contrast to position B.

C: the animal is swimming near the substrate.

Explanation of Plate 11, 118

Figs. 1, 2, LV (paratype, IGR 5700/BI): fig. 1, int. vent, obi.; fig. 2, vent, obi., detail showing postero-ventral spine.

Scale A (250 /im; x 90), fig. 1 ; scale B (250 /am; x 120), fig. 2.

Stereo- Atlas of Ostracod Shells 11, 116

Raimbautina hammanni (6 of 8)

Stereo- Atlas of Ostracod Shells 11, 118

Raimbautina hammanni (8 of 8)

Stereo-Atlas of Ostracod Shells 11 (23) 119-122 (1984) Thibautina rorei (1 of 4)

595.336.12 (113.311) (44 : 162.001.48) : 551.35 + 552.52

ON THIBAUTINA ROREI VANNIER gen. et sp. nov.

by Jean Vannier
( University of Rennes, France)

Genus THIBAUTINA gen. nov.

Type-species: Thibautina rorei sp. nov.

In honour of Thibaut de Navarre (1201-1253), poet, trouvere. King of Navarre. Gender feminine.
Small (length<0.8mm) smooth binodicope; amplete. Short dorsal margin (length< 0.75 mm);
hypocline dorsum. Figure-of-eight-shaped ridge, rounded in tranverse section and ‘open’ dorsally,
on valve lateral surface; in the medio-ventral part of the valve this ridge forms a bulb-like elevation.
Sulcus S2 perpendicular to dorsal margin, wide, short and deep. In the central part of the valve, this
sulcus is symmetrically extended into two narrow divergent depressions, giving an inverted- Y form.
Marginal surface undifferentiated, convex or flat anterodorsally and posterodorsally.

Thibautina gen. nov. is comparable to several Ordovician genera such as Pedomphalella Swain &
Cornell in Swain 1961, Kinnekullea Henningsmoen, 1948, Jonesites Coryell, 1930 and Cincinnati-
concha Warshauer, 1981, all belonging to the Superfamily Aechminacea Boucek, 1936. These
genera have some important features in common with Thibautina : small-sized valves, length rarely
exceeding 1mm; and an arched ridge, rounded in section, more or less developed on the valve lateral
surface. Nevertheless, Thibautina is distinguished from other genera by its crescent-shape ridge and
its inverted-Y depression in the dorsal half of the valve. In many species of Pedomphalella, such as
Pedomphalella egregia from the Caradocian of Baltoscandia (cf. Schallreuter, Ber. deutsch. Ges.
geol. Wiss, A. Geol. Palaont. 13, pi. 2, fig. 2, 1968), the peripheral ridge overhangs a wide circular
depression on the valve lateral surface, in contrast to that of Thibautina rorei.

Explanation of Plate 11, 120

Figs. 1-5, RV (holotype, IGR 5183/A1, 640/u.m long) : fig. 1, ext. lat.; fig. 2, ext. vent, obi.; fig. 3, ext. dors.; fig. 4, ext. post, obi.; fig. 5,
ext. ant. obi.

Scale A (250/u.m; x 100), figs. 1-5.

Stereo-Atlas of Ostracod Shells 11, 121 Thibautina rorei (3 of 4)

Derivation of name:
Diagnosis:

Remarks:

Remarks (contd.): Species of Jonesites such as Jonesites obliquus from the upper Ordovician of the USSR (cf.

Neckaja, Trudy vsesneft. nauchno-issed, geol. -razv. Inst., 20, 251, pi. 3, fig. 11, 1966), and species
of Kinnekullea such as Kinnekullea thorslundi from the uppermost Caradocian of Sweden (cf.
Henningsmoen, Bull. geol. Instn Univ. Upsala, 32, 414, pi. 27, figs. 7-9, 1948), have an incomplete
ridge parallel to the free margin and in many cases it is connected with node(s) near the dorsal
margin. In the American Cincinnaticoncha (cf. type-species C. pedigera Warshauer, J . Paleont.. 55,
pi. 1. figs. 13-19, 1981) the ridge is prominent and arched dorsally (as in Thibautina rorei), but is
developed as an horizontally-disposed J-shaped lobe in contrast to that of the Armorican species.
Two species belonging to the genus Rivillina Vannier, 1983, from the Ordovician of France
(Armorican Massif) and Spain (cf. Vannier, Alcheringa, 7, 1983), also exhibit a ridge of a similar
type to that of Thibautina rorei, but the shape and extent of the ridge differs between the two genera.

Thibautina rorei sp. nov.

Holotype:
Type locality:

Derivation of name:
Figured specimens:

Diagnosis:

Distribution:

Institut de Geologie, University of Rennes (IGR), coll. no. 5183/A1; RV.

[Paratypes: IGR coll. nos. 5181/A12, RV; 5184/BI, RV; 5184/C, RV; 5180/A, RV).

Bed with phosphatic pebbles within the siltstones and mudstones of the Domfront section (samples
DF-9), Ome, France (cf. F. Paris, Mem. Soc. geol. mineral. Bretagne, 26, 1981); lat. 48°36'24"N,
long. 0°41'6" W. Lower part of the Pissot Formation, Llanvirn Series, Ordovician.

In honour of Cipriano de Rore (1516-1565), Italian musician of the Renaissance.

Institute de Geologie, University of Rennes (IGR) coll. nos. 5183/A1 (holotype, RV: PI. 11, 120,
figs. 1-5) and 5184/C (RV : PI. 11, 122, figs. 1-3). Both from type locality; latex cats.

As for the genus. Monotypic.

At present, known only from the siltstones and mudstones of the type locality.

Explanation of Plate 11, 122

Figs. 1-3, RV (paratype, IGR 5184/C, 650/a.m long) : fig. 1, ext. lat.; fig. 2, ext. vent, obi.; fig. 3, ext. dors.
Scale A (250 yum; x 110), figs. 1-3.

Stereo- Atlas of Ostracod Shells 11, 122

Thibautina rorei (4 of 4)

Stereo-Atlas of Ostracod Shells 11, 120

Thibautina rorei (2 of 4)

Stereo-Atlas of Ostracod Shells 11 (24) 123-126 (1984) Platybolbina runica (1 of 4)

595.336.13 (113.313) (437 : 161.014.50) : 551.351

on PLATYBOLBINA RUNICA SCHALLREUTER & KRUTA sp. nov.

by Roger E. L. Schallreuter & Miroslav Kruta

(University of Hamburg, German Federal Republic & Academy of Sciences, Prague, Czechoslovakia)

Platybolbina runica sp. nov.

Holotype:

Type locality:
Derivation of name:
Figured specimens:

Diagnosis:

National (Narodm) Museum, Prague, Czechoslovakia, (NM) no. 22740; 9 LV (on rock).

[Paratype: nos. NM 22741 (steinkern) and 22742 (valve on rock)].

Jezerce, Nusle, Prague; lat. 50° 5.5'N, long. 14° 28.5 E. Kraluv Dvur Stage, upper Ordovician.
Rune, old Nordic - germanic letter; alluding to the scars in the muscle spot.

NM nos. 22740 (holotype, 9 LV: PI. 11, 124, figs. 1, 2), 22741 (steinkern of paratype, juv. tecno-
morphic RV: PI. 11, 126, figs. 1, 2) and 22742 (valve of paratype in the counterpart of rock: PI. 11,
124, fig. 3; PI. 11, 126, fig. 3). All from the type locality.

Species of Platybolbina with a medium-sized muscle spot in a sulcal depression which continues
dorsally in an anterodorsal direction. Dolon weakly convex. Reticulation pattern moderately coarse.
Females c. 2.24mm long.

Explanation of Plate 11, 124

Figs. 1, 2, 9 LV (holotype, NM 22740, 2.24 mm long): fig. 1, int. lat.; fig. 2, photographical ‘cast’ of fig. 1; fig. 3, juv. tecnomorphic RV,
int. lat., ornament behind muscle spot, photographical ‘cast’ (paratype, NM 22742, 1.66 mm long).

Scale A (250/rm; x 37.5), figs. 1, 2; scale B (100/um; x 90), fig. 3.

Stereo-Atlas of Ostracod Shells 11, 125 Platybolbina runica (3 of 4)

Remarks: The only two known valves ofP. runica show only the inside of the shell and the exact nature of the

external morphology of the shell is unknown. P. runica is clearly a member of Platybolbina but a sub-
generic assignment, to eitherP. (Reticulobolbina) or P. (Rimabolbina) (cf. Schallreuter, Geologie 18,
877, 1969) is not possible because it is not yet known whether its muscle spot possesses a fissum or
not. P. runica is the largest known species of Platybolbina . The previous known largest reticulate
species isP. (Reticulobolbina) temperata Sarv, the holotype of which, a female valve, is 1 .70mm long
(Sarv, Eesti NSV Tead. Akad. geol. Inst. Uurim., 1, 39, 1956). The largest known species of P.
(Rimabolbina) , a subgenus known only from middle Ordovician, is P. (R.) omphalota Kesling
(1.88 mm long; see Kesling, Contr. Mus. Paleont. Univ. Mich., 15, 368, 1960). Contrarary to P.
runica, bothP. omphalota and P. temperata have very fine reticulation (Kesling, op. cit., pi. 8, figs.
4-6; Sarv, Eesti NSV Tead. Akad. geol. Inst. Uurim., 4, pi. 2, figs. 2-3; Schallreuter, Palaeonto-
graphica (A), 180, pi. 27(13), fig. 6, 1983).

The muscle spot in the paratype (PI. 11, 126, figs. 1-3) shows tiny impressions which could
possibly represent individual attachment points of the adductor muscle scar. They appear to be
arranged with one long oblique scar above several smaller attachment points, an arrangement which
differs from that of P. (Reticulobolbina) integra (Schallreuter, op. cit., 878) which has a complex of
many small scars. The small pit-like impression in front of the dorsal end of the muscle spot (see PI.
11,1 26, figs. 1-3) may represent an accessory muscle scar. It has a comparable position to the frontal
group of muscle scars of other ostracodes.

Distribution: Known only from type locality; upper Ordovician.

Explanation of Plate 11, 126

Figs. 1-3, juv. tecnomorphic RV (paratype NM 22741-2): figs. 1, 2, steinkern showing domicilium and anteroventral part of velum
(NM 22741): fig. 1, ext. lat.; fig. 2, muscle spot; fig. 3, photographical ‘cast’ of the counterpart in rock (NM 22742), int. lat.
Scale A (250/am; x 49), figs. 1,3; scale B (100/Ltm; x 95), fig. 2.

Stereo- Atlas of Ostraeod Shells 11, 124 Platybolbina runica (2 of 4)

Stereo-Atlas of Ostraeod Shells 11, 126 Platybolbina runica (4 of 4)

Stereo-Atlas of Ostracod Shells 11 (25) 127-136 (1984) Piretopsis bohemica (1 of 10)

595.336.13 (113.312) (437 : 161.014.49) : 551.351 + 552.51

ON PIRETOPSIS (CERNINELLA) BOHEMICA (BARRANDE)

by R. E. L. Schallreuter, David J. Siveter & M. Kruta

(University of Hamburg, West Germany, University of Leicester , England & Academy of Sciences, Prague, Czechoslovakia)

Genus PIRETOPSIS Henningsmoen, 1953

1953 Piretopsis gen. n.; G. Henningsmoen, Norsk Geol. Tidsskr., 32, 43.

1957 Protallinnella nov.; V. Jaanusson, Bull. geol. Instn Univ. Uppsala, 37, 353.

Type-species (by original designation): Piretopsis donsi Henningsmoen, 1953
Subgenus CERNINELLA Pribyl, 1966

1966 Cerninella gen. n.; A. Pribyl, Casopis narodniho muzea, odd. prirod., 135, 201.

Type-species (by original designation): Beyrichia bohemica Barrande, 1872
Diagnosis: See ‘species diagnosis’. The subgenus is considered monotypic.

Remarks: Pribyl (1966) designated Beyrichia bohemica as the type-species of Cerninella. From the genera he

compared with Cerninella, the baltoscandianProta//mA7c//fl Jaanusson is the most similar. However,
this applies more to those Protallinnella species described by Sarv (Eesti NSV Tead. Akad. Geol. Inst.
Uurim. 13, 166-171, 1963) than to the type-species P. grewingki (Bock, 1867), which is the oldest
representative of the genus and which differs from Cerninella notably by its vertical lobes/cristae and
relatively narrow S3 (see Opik ,Publ. Geol. Inst. Univ. Tartu, 44, pi. 2, fig. la). In ‘B’. bohemica
(middle Ordovician, Bohemia), S3 is very broad and the anterior lobes/cristae are oblique to the
dorsal border. The other, slightly younger (upper Volkhovian/lower and middle Kundan) species of

Explanation of Plate 11, 128

Fig. 1, 9RV,ext.lat.(GPIMH2948b,3 .47 mm long, excluding spines) ; fig. 2, posteriorly incomplete tecnomorphic LV, ext. lat., covered
anteroventrally by the 9 RV of fig. 1 (GPIMH 2948a, 3.24mm long).

Scale A (500/xm; x 26), figs. 1, 2.

Stereo-Atlas of Ostracod Shells 11, 129 Piretopsis bohemica (3 of 10)

Remarks (contd.): Protallinnella described by Sarv (op. cit.), and Tetradella salopiensis Harper, 1947 from the Caradoc

of Shropshire, assigned to Cerninella by Pribyl (1966, 203), form a gradual morphological transition
series between the type-species of Protallinnella and Cerninella (cf., for example, Sarv, op. cit., pi. 4,
figs. 5-10 and Siveter, Geol. 7. Spec. Issue 8, 51, pi. 2, figs. 2-4, 1978). Thus, it is considered not
possible to separate Cerninella as a distinct genus. This would blur not only its assumed natural
relationships but also its phylogenetic and palaeogeographic implications.

Pribyl (1966, 202) assumed that Cerninella originated from Protallinnella (or related forms
such as Tallinnellina). This seems to be correct. The stratigraphical occurrences and adult lengths of
the relevant species agree with the morphological changes from oldest to youngest species: P.
grewingki, Middle Volkhovian (1.30 mm); P. loennaensis, Upper Volkhovian (1.70 mm); P.
salopiensis , Costonian (2.93mm); P. bohemica, Vinice Stage (3.72mm). P. bohemica appears, as
expected, to be a morphologically advanced form. However, at the present state of knowledge it is
hard to say whether it originates in a direct line from typical Protallinnella species or whether it forms
a separate branch justifying a distinct subgenus. For the present Cerninella is retained at subgeneric
level.

The systematic position of the Bohemian material which Pribyl (1966) assigned to Cerninella
complicata is also uncertain. The real Beyrichia complicata Salter, 1848, from the Llandeilo of
Wales, has an anterior antrum like the type-species of Tallinnella and belongs to a new tallinnelline
genus (Siveter, in press; cf., op. cit. 49, pi. 1, figs. 7, 8). The dimorphism of Pribyl’s Bohemian
material is unknown, but could possibly also belong to a tetradellid such as Ogmoopsis . If, however,
the material does belong to Cerninella s.s. it would represent the oldest known species (Sarka Stage,
upper lower or lower middle Ordovician) and would justify the subgeneric status of that taxon.

A feature of Cerninella is the parable-like confluent Cl + C3, a pattern also present in the
hitherto monotypic Piretopsis (middle Ordovician, 4a/3, of the Oslo Region), a genus which seems to
be closely related to Protallinnella. Piretopsis differs from both Protallinnella and Cerninella by

Explanation of Plate 11, 130

Fig. 1, tecnomorphic LV, ext. lat. (GPIMH 2949, 2.94mm long, excluding spines); fig. 2, tecnomorphic LV, ext. lat. (GPIMH 2950,
3.05mm long, excluding spines). Scale A (500/xm; x28.5), figs. 1, 2.

Stereo- Atlas of Ostracod Shells 11, 130

Piretopsis bohemica (4 of 10)

Piretopsis bohemica (2 of 10)

Stereo- Atlas of Ostracod Shells 11, 128

Stereo-Atlas of Ostracod Shells 11, 131 Piretopsis bohemica (5 of 10)

Remarks (contd.): lacking C2, and also from Cerninella by its smaller S3. The “horn-like LI” of Piretopsis resembles

the bulb-like LI of internal moulds of Cerninella (Pribyl, op. cit., pi. 1(15), figs. 1, 2, 1966). Like
Cerninella , Piretopsis is at present best considered a monotypic subgenus. Piretopsis was originally
placed by Henningsmoen within the Piretellinae. Schallreuter ( Geologie , 15, 200, 204, 1966)
assigned Piretopsis to the Steusloffiinae and assumed an origin from Tallinnella. However, more
probably, Piretopsis originates from Protallinnella in the lower Ordovician.

The short, isolated C2 of P. ( Cerninella ) has an homeomorphic equivalent in Steusloffia, a
genus which probably originated from Rigidella. In Rigidella, as in P. (Protallinnella) , C2 is still
connected with the other cristae (cf. Schallreuter, Palaeontographica A 153, text-fig. 6, 1976;
Jaanusson, op. cit., text-fig. 35D, 1957).

Distribution: P. (Piretopsis): middle Ordovician (4ab) of Oslo Region. P. (Cerninella): see type-species. P.

(Protallinnella) : lower Ordovician (upper Oeland: B2b-B3b) of Baltoscandia, middle Ordovician
(Costonian) of Welsh Borderland; also middle Ordovician (Llandeilo) of Morocco (J. Vannier,
pers. comm.).

Piretopsis (Cerninella) bohemica (Barrande, 1872)

1855 Beyrichia Bohemica, Barrande, MS; T. R. Jones, Ann. Mag. nat. Hist., (2) 16, 91 ( nom . nud.).

1868 Beyrichia Bohemica, Barr.; J. J. Bigsby, Thesaurus Siluricus, 72 §, 199 (nom. nud.).

1872 Beyrichia Bohemica. Barr.; J. Barrande, Systeme Silurien (I) Suppl. 1, 492, 497, 498-9, 500, pi. 26, figs. 13a-d, pi. 34, figs.

18-22.

1876 Beyrichia Bohemica, Barr.; G. le G. de Tromelin & P. Lebesconte, Assoc. Franc, avancement sci. C.R. 4me sess. Nantes
(1875), 638.

1889 Beyrichia Bohemica Barrande; A Krause, Z. Dt. geol. Ges., 41, 20.

1889 Beyrichia Bohemica Barrande; A. Krause, Sber. Ges. naturf. Freunde Berlin, 1889 (1), 15.

Explanation of Plate 11, 132

Fig. 1, tecnomorphic RV, ext. vent. obi. (GPIMH 2951, visible part 2.68mm long, excluding spines); fig. 2, $ RV, ext. vent. obi. (GPIMH
2952, visible part 2.75mm long); fig. 3, 9 RV, ext. ant. (GPIMH 2948b).

Scale A (500/u.m; x 27), figs. 1, 2; scale B (500/um; X22.5), fig. 3.

Stereo-Atlas of Ostracod Shells 11, 133 Piretopsis bohemica (7 of 10)

1896 Beyr. Bohemica Barr. (= Tetradella? ); G. Giirich, Verh. Russ.-Kaiserl. miner. Ges., 32, 388.

1908 Tetradella bohemica (Barrande); E. O. Ulrich & R. S. Bassler, Proc. U.S. natn. Mus., 35, 306.

1934 Tetradella bohemica (Barrande); R. S. Bassler & B. Kellett, Spec. Pap. geol. Soc. Am., 1, 54, 479.

1941 Tetradella bohemica (Barrande 1872); E. A. Schmidt, Abh. Senck. Naturf. Ges., 454, 40, 41, 43-44 (all pars): non 40, 41,
43-44 (all pars), 30, 47, 64, pi. 2, figs. 11-13 (all = Tallinnella ? hloubetinensis Jaanusson, 1957).

1954 Beyrichia bohemica Barr.; D. D. Hughes, Micropaleontologist , 8(3), 41.

1957 Tallinnella? bohemica (Barrande, 1872); V. Jannusson,Bn//. geol. Instn Univ. Uppsala, 37, 342, 343, text-fig. 36, pi. 10, fig. 3
(probably = PI. 11, 130, fig. 1 herein).

1962 Tetradella bohemica (Barrande); A. H. Muller & H. Zimmermann, Aus J ahrmillionen Tiere der Vorzeit, 387, fig. 140, Jena.

1963 Tetradella bohemica (Barrande); A. H. Muller, Lehrbuch der Paldozoologie , 2(3), fig. 44B (= Muller & Zimmermann, op. cit.,
fig. 140), Jena.

1966 Tetradella ? bohemica (Barrande, 1872); A. Pribyl in Z. Spinar et al., Systematickd paleontologie bezobratlych, 684, text-fig.
X-116 (= Muller & Zimmerman, op. cit., fig. 140), Prague.

1966 Tallinnella bohemica (Barr.); V. Havlicek & J. Vanek, Sborm'k geol. ved (P), 8, 32, 53, 55.

1966 Cerninella (Cerninella) bohemica (Barrande, 1872); A. Pribyl, Cas Narodniho Muzea, odd, phrod., 135, 201, 202, 203, 204-5,
206, 207, pi. 1(15), figs. 1, 2, pi. 2(16), figs. 1-3, text-fig. 2a-b.

1978 Tetradella bohemica (Barrande) ; A. H. Muller, Lehrbuch der Paldozoologie , 2(3), fig. 55 (= Muller, op. cit., fig. 44B), 2nd edit.
Jena.

1979 Cherninella bohemica (Barrande, 1872); V. A. Ivanova, Trudy Paleont. Inst. Akad. nauk SSSR, 172, 168.

1979 Cerninella bohemica (Barrande, 1872); A. Pribyl, Sborm'k Ndrodm'ho Muzea (B), 33 (for 1977), 54, 63, 67, 108. 112, table
between 112 & 113, pi. 4, figs. 1-2 (= Pribyl, op. cit., pi. 2(16), figs. 2, 3), text-figs. 3.1-2 (= Pribyl, op. cit., text-figs. 2b, 2a),
11.1-2 (= Pribyl, op. cit., pi. 1(15), figs. 1, 2), 16.1 (text-fig. 11.2 = part of 16.1).

1983 Cerninella bohemica (Barrande, 1872); C. R. Jones & David J. Siveter, Stereo-Atlas Ostracod Shells, 10, 7.

Explanation of Plate 11, 134

Fig. 1, $ LV, int. lat. (GPIMH 2953, 3 .40mm long, inclusive of dolon) ; fig. 2, 9 RV, int. lat. (GPIMH 2954, 2.96 mm long, excluding
spines and dolon); fig. 3, tecnomorphic LV, ext. lat., ornament on posterior lobe (GPIMH 2949).

Scale A (500/u.m; x 23), figs. 1, 2; scale B (100/am; x 110), fig. 3.

Stereo-Atlas of Ostracod Shells 11, 134

Piretopsis bohemica (8 of 10)

Stereo-Atlas of Ostracod Shells 11, 135

Piretopsis bohemica (9 of 10)

Lectotype:

Type locality:
Figured specimens:

Diagnosis:

National Museum, Prague; internal mould, 9 LV (not carapace as stated by Schmidt 1941). On a
piece of almost black mudstone, no. L 10010 [ex. CD 805, Inv. no. 1700]; figured by Muller &
Zimmermann 1962, Muller 1963, 1978 and Pribyl m Spinar (loci cit.). Designated by E. A. Schmidt
1941, op. cit., 43; Barrande 1872, op. cit., pi. 34, figs. 19, 20; Pribyl 1966, op. cit., text-fig. 2a
(drawing), pi. 1(15), fig. 1 (right hand side) [= Pribyl 1979, op. cit., text-fig. 3.2 and 11.1 (righthand
side) respectively]. Barrande’s drawing of the specimen chosen as lectotype does not agree in all
details with the specimen considered as the lectotype by Pribyl but the latter is in all probability the type.

[Paratypes: 4 further pieces of rock, with many internal and external moulds, nos. L 10009
(part and counterpart), L 10011- L 10013. Pieces L 10009 and L 10011 are black mudstone; L 10012
and L 10013 consist of a mica- and limonite-rich dark-grey mudstone in which the ostracode shells are
replaced by limonite, and presumably come from another horizon].

Vinice Formation, Caradoc. Trubin, near Kraluv Dvur, Bohemia; lat. 49°3'N, long. 14°2'E.
Geologisch-Palaontologisches Institut und Museum, University of Hamburg (GPIMH) nos.
2948a (tecnomorphic LV : PI. 11, 128, fig. 2), 2948b (9 RV: PI. 11, 128, fig. 1; PI. 11, 132, fig. 3),
2949 (tecnomorphic LV : PI. 11, 130, fig. 1 ; PI. 11, 134, fig. 3), 2950 (tecnomorphic LV : PI. 11, 130,
fig. 2), 2951 (tecnomorphic RV: PI. 11, 132, fig. 1), 2952(9 RV: PI. 11, 132, fig. 2), 2953 (9 LV: PI.
11, 134. fig. 1) and 2954 (9 RV: PI. 11, 134, fig. 2). All GPIMH numbers refer to ‘Silcoset’ casts
from the slab of black mudstone no. Ar 39170, Paleozoologiska sektionen, Naturhistoriska
Riksmuseet, Stockholm; from the Vinice Formation, Caradoc Series of the type locality. The slab
contains many external and a few internal moulds ofP. (C.) bohemica , together with single valves of
Hastatellina sp ,,Disulcinoides ? sp. and Parapyxion ? sp. Cast no. 2949 is probably of the same valve,
on Ar 39169, as that figured by Jaanusson (1957).

Piretopsis (Cerninella) species with very broad S3 and bulb-like LI and L3 at the dorsal border. Cl
and C3 form a parable-like crista distinctly oblique (in anteroventral direction) to the dorsal margin,
where each has a sharp cusp-like termination. C2 normally isolated from Cl + C3, dorsally extending
to the mid-dorsal half of the valve. C4 connected with C1 + C3 at a distinct angle, and absent
dorsally except for a plica-like cusp at the dorsal margin. Velum is a rather narrow flange, sometimes
undulate, from anterodorsal corner to gradual posterocentral termination. Velar dimorphism:
dolon narrow, weakly convex; antrum very shallow. Marginal sculpture formed by a row of spines.
Tiny spines along all parts of velar edge except dolon.

Stereo-Atlas of Ostracod Shells 11, 136

Piretopsis bohemica (10 of 10)

Remarks: P. (C.) bohemica is the youngest and largest (3.72mm ) Piretopsis species, differing from congeneric
species mainly by its very broad S3, its oblique anterior lobes/cristae and its normally isolated C2. In
the type-species, P. (Piretopsis) donsi (adult length 2.3 mm), C2 seems to be missing whereas in all
P. (Protallinnella) species C2 is still connected with Cl + C3 and more or less perpendicular to the
dorsal margin. In P. (Protallinnella) salopiensis (Harper, 1947) the anterior cristae are already
slightly oblique to the dorsal margin. Furthermore, C4 inP. (P.) donsi is separated from Cl + C3 but
complete, inP. (Protallinnella) tricostata (Sarv, 1963) it is absent, and inP. (C.) bohemica it is still
connected with Cl + C3 but is lacking dorsally except for a plica-like cusp which resembles that ofP.
(Protallinnella) loennaensis (Sarv, pi. 4, figs. 5-8, 10, 1963).

Velar dimorphism inP. (C.) bohemica is weakly developed and is very similar to that of the
steusloffiin ePseudostrepula (cf. PI. 11, 128, figs., 1, 2 with Schallreuter, Geologie 15, pi. 4, figs. 1, 2,
1966 or Palaeontographica A 180, PI. 25(11), figs. 4, 5, 1983). In the type-species ofP. (Piretopsis)
and P. (Protallinnella) the dolonal antra seem to be broader and therefore more distinct (Opik, op.
cit., pi. 2, fig. 1 b ; Henningsmoen, op. cit., pi. 2, fig. 7). Reduced velar dimorphism during phylogeny
also occurs in other steusloffiines (eg Steusloffta, Jaanusson, op. cit., 339).

On Ar. 39170 one tecnomorph, much smaller than all the sympatricP. bohemica valves, is
distinguished mainly by the total absence of cristae and its highly spinose lobes and velum. It may be
conspecific withP. bohemica , but this is not certain owing to the lack of intermediate sized larvae.

Distribution: With certainty only from the type locality. Recorded (material not seen) from elsewhere in

Czechoslovakia from Cernin and other localities in the Vinice Fm (=Cernin Fm) and from the
underlying Letna Fm (lower Caradoc) of Blyskava, Chrustenice, Dlouha hora, Petrovka, Drabov
and possibly Benn and other localities (Pribyl, 205, 1966); also from the underlying Liben Fm,
upper Llandeilo (Havlicek & Vanek, op. cit., 53).

Acknowledgements: RELS is indebted to the Deutsche Forschungsgemeinschaft (DFG) for supporting the investigation.

D J S gratefully acknowledges an exchange visit under the auspices of the Royal Society and theDPG
in cooperation with the GPIMH. MK thanks the Czechoslovakian Academy of Sciences and the
GPIMH for making the collaborative study possible.

■

M

Stereo-Atlas of Ostracod Shells 11 (26) 137-140 (1984)
595.337.11. (118.14) (540 : 161.074.33) : 551.35 + 552.54

Bairdoppilata kalakotensis (1 of 4)

ON BAIRDOPPILATA KALAKOTENSIS SINGH & TEWARI

by John W. Neale & Pratap Singh
(University of Hull, & 33 Khur Bura, Dehra Dun, India)

Bairdoppilata kalakotensis Singh & Tewari, 1966

1966 Bairdoppilata kalakotensis sp. nov. P. Singh & B. S. Tewari in B. S. Tewari & P. Singh, Cent.Advan. Study in Geology, Panjab
University , Chandigarh, 3, 118, pi. 1, figs. la-d.

71968 Bairdoppilata jaswanti sp. nov. S. N. Singh & Misra, J. Pal. Soc. India, 11, 26, pi. 11, fig. 1, non. pi. 10, figs. 9, 10.
Holotype: University of Lucknow, India, coll. no. L.U. 216.

[Paratype: L.U. 217],

Sample 22; dark grey, fossiliferous, argillaceous limestone of the Kalakot Formation, Subathu
Group, late early Eocene. About 150ft. above road level in a cliff on the western side of the road
leading to Gua from Beragua and situated at a distance of about 800 feet S 1 5°W from the opening of
the Beragua Mine in the Kalakot Coalfield (Survey of India topographic sheet 43K/8), Nawshera
and Rajouri Tehsils of Poonch District, Jammu and Kashmir State, India (Text fig. 1).
University of Lucknow, India, nos. L.U. 216 (holotype, car. PI. 11, 138, figs. 1, 2; PI. 11, 140, fig. 2)
and L.U. 217 (car.: PI. 11, 140, figs. 1, 3). Both from the type locality.

Carapace large, subtriangular. Dorsal margin arched, ventral margin convex. Upper half of anterior
end rounded, posterior end somewhat drawn out below middle line. Left valve larger, anterodorsal
overlap quite pronounced as compared to posterodorsal and mid-dorsal, ventral overlap pro-
nounced. Teeth distinct on anterodorsal and posterodorsal angles. Highest in middle; lateral outline
in dorsal and ventral views strongly convex, dorsal margin on anterior side curved and ventral
margin strongly curved in middle region.

Type locality:

Figured specimens:
Diagnosis:

Explanation of Plate 11, 138

Figs. 1, 2, car. (holotype, L.U. 216, 1330p.m long): fig. 1, ext. rt. lat.; fig. 2, ext. It. lat.
Scale A (200/rm; x 132), figs. 1, 2.

Stereo- Atlas of Ostracod Shells 11, 139

Bairdoppilata kalakotensis (3 of 4)

Remarks: This species is close to Bairdia subdeltoidea (Munster) of Latham (Trans. R. Soc. Edin., 59, 39-40

1938), from the Palaeocene of Pakistan. Latham’s form (length = 1340/rm) is similar in size but
differs in being higher anteriorly with a steeper anterodorsal slope and less concave anterodorsal and
more convex anteroventral margins in the right valve. The apparent projection of the posterior end
of the right valve in Latham’s specimen appears due to the absence of the left valve extremity
because of breakage (as ascertained by optical microscopy). Bairdia subdeltoidea (Oligocene of
W Germany) differs from both in its shorter, straighter anterodorsal margin and less sloping centro-
dorsal margin and Latham’s form will eventually need a new name. Bairdoppilata poddari
Lubimova & Mohan (Bull. Geol. Min. Met. Soc. India , 22, 21-22, 1960) is higher in proportion to
length and otherwise differs in much the same way as B. subdeltoidea. In 1972 Khosla (Micropaleon-
tology, 18, 484) referred S. N. Singh and Misra’sB. jaswanti (Eocene Fuller’s Earth, Kolayatji area,
Bikaner, Rajasthan) to B. poddari. However, Singh and Misra’s second figured specimen (p. 11,
fig. 1 ) is closer to B. kalakotensis and in view of the length they
give for B. jaswanti (950)U,m) could be a juvenile of the
present species. We have not examined the originals so
place it only questionably in the synonymy of Bairdoppilata
kalakotensis. The typical subtriangular carapace shape, the
very steep posterodorsal and steep anterodorsal slopes of the
dorsal margin and all round overlap of the left valve allow
Bairdoppilata kalakotensis to be distinguished from the
associated Bairdia beraguaensis, Bairdia kalakotensis (see
Stereo-Atlas of Ostracod Shells 11, 141-144 & 145-148
respectively) and Bairdia jammmuensis Singh & Tewari.

Distribution: Late early Eocene Kalakot Formation, Subathu Group,

Jammu and Kashmir State. Also the Ghotaru no. 1 well of
Rajasthan (in prep.).

Explanation of Plate 11, 140

Figs. 1, 3, car., (paratype, L.U. 217, 1450 pm long): fig. 1, ext. rt. lat.; fig. 3, vent.; fig. 2, car.,
ext. dors, (holotype, L.U. 216, 1330 pm long).

Scale A (200 /u,m; x 62), fig. 1 ; Scale B (200 pm; x 43), figs. 2, 3.

Text-fig. 1 . Location of type locality.

Stereo- Atlas of Ostracod Shells 11, 140

Bairdoppilata kalakotensis (4 of 4)

Stereo- Atlas of Ostracod Shells 11, 138

Bairdoppilata kalakotensis (2 of 4)

Stereo-Atlas of Ostracod Shells 11 (27) 141-144 (1984) Bairdia beraguaensis (1 of 4)

595.337.11. (118.14) (540 : 161.074.33) : 551.35 + 552.54

ON BAIRDIA BERAGUAENSIS SINGH & TEWARI

by Pratap Singh

(33 Khur Bura, Dehra Dun, India)

Bairdia beraguaensis Singh & Tewari, 1966

1966 Bairdia beraguaensis sp. nov. P. Singh & B. S. Tewari in B. S. Tewari & P. Singh, Cent.Advan. Study in Geology, Pan jab Univer-
sity, Chandigarh, 3, 119, pi. 1, figs. 4a-d.

Holotype: University of Lucknow, India, no. L.U. 214.

[Paratype: L.U. 215].

Type locality: Sample 22; dark grey, fossiliferous, argillaceous limestone of the Kalakot Formation, Subathu

Group, late early Eocene. About 150ft above road level in a cliff on the western side of the road
leading to Guafrom Beragua and situated at a distance of about 800 feet S15°W from the opening of
the Beragua Mine in the Kalakot Coalfield (Survey of India topographic sheet 43K/8), Nawshera
and Rajouri Tehsils of Poonch District, Jammu and Kashmir State, India (see Neale & Singh, Stereo-
Atlas of Ostracod Shells, 11, 139, text-fig. 1).

Figured specimens: University of Lucknow, India, nos. L.U. 214 (holotype, car.: PI. 11, 142, fig. 1; PI. 11, 144, fig. 2)

and L.U. 215 (car.: PI. 11, 142, fig. 2; PI. 11, 144, figs. 1, 3). Both specimens are from the type
locality.

Explanation of Plate 11, 142

Fig. 1, car., ext. rt. lat. (holotype, L.U. 214, 1005/xm long); fig. 2, car., ext. It. lat. (paratype, L.U. 215, 1002/xm long).
Scale A (200 /x m; x 99), figs. 1, 2.

Stereo- Atlas of Ostracod Shells 11, 143 Bairdia beraguaensis (3 of 4)

Diagnosis:

Remarks:

Distribution:

Carapace elongate. Dorsal margin subarched, anterodorsal margin slightly concave, posterodorsal
margin markedly concave, mid-ventral margin slightly convex. Angularly rounded anterior end,
posterior and constricted and produced. Larger left valve overlaps right valve along dorsal and mid-
posterior to mid-ventral regions. Height is half length, highest at mid-length. Lateral outline in
dorsal and ventral views convex with both ends compressed, dorsal and ventral margins slightly
curved.

Bairdiacea are particularly well represented in the Eocene of Jammu and Kashmir State, this species
being one of six recorded (see Tewari & Singh, op. cit.).R. beraguaensis differs from Bairdoppilata
kalakotensis Singh & Tewari, Bairdia kalakotensis Singh & Tewari (see Stereo-Atlas of Ostracod
Shells 11, 137-140 & 145-148 respectively) and Bairdia jammuensis Singh & Tewari in its promi-
nent beak-like projection at the posterior end.

Bairdia beraguaensis occurs in the late early Eocene Kalakot Formation of the Subathu Group
exposed in Jammu & Kashmir State, India.

Explanation of Plate 11, 144

Figs. 1 , 3, car. (paratype, L.U. 215, 1002 p. m long): fig. l,ext. rt. lat.; fig. 3, ext. vent. Fig. 2, car., ext. dors, (holotype, L.U. 214, 1005 /xm
long).

Scale A (200 /am; x 99), fig. 1; Scale B (200 /xm; x 70), fig. 2; Scale C (200 /xm; x 66), fig. 3.

Stereo- Atlas of Ostracod Shells 11, 142

Stereo- Atlas of Ostracod Shells 11, 144

Bairdia beraguaensis (4 of 4)

Bairdia beraguaensis (2 of 4)

Stereo-Atlas of Ostracod Shells 11 (28) 145-148 (1984) Bairdia kalakotensis (1 of 4)

595.337.11. (118.14) (540 : 161.074.33) : 551.35 + 552.54

ON BAIRDIA KALAKOTENSIS SINGH & TEWARI

by Pratap Singh

(33 Khur Bura, Dehra Dun, India)

Bairdia kalakotensis Singh & Tewari, 1966

1966 Bairdia kalakotensis sp. nov. P. Singh & B. S. Tewari in B. S. Tewari & P. Singh, Cent.Advan. Study in Geology, Panjab Univer-
sity, Chandigarh, 3, 118, pi. 1., figs. 2a-d.

Holotype: University of Lucknow coll. no. L.U. 210.

[Para type: L.U. 211],

Type locality: Sample 22; dark grey, fossiliferous, argillaceous limestone of the Kalakot Formation, Sabuthu

Group, late early Eocene. About 150ft above road level in a cliff on the western side of the road
leading to Gua from Beragua and situated at a distance of about 800 feet, S 1 5°W from the opening of
the Beragua Mine in the Kalakot Coalfield (Survey of India topographic sheet 43K/8), Nawshera
and Rajouri Tehsils of Poonch District, Jammu and Kashmir State, India (see Neale & Singh, Stereo-
Atlas of Ostracod Shells 11, 139, text-fig. 1).

Figured specimens: University of Lucknow, India, nos. L.U. 210 (holotype, car.: PI. 11, 146, figs. 1,2; PI. 11, 148, figs. 2,

3) and L.U. 211 (car.: PL 11, 148, fig. 1). Both specimens are from the type locality.

Explanation of Plate 11, 146

Figs. 1, 2, car. (holotype, L.U. 210, 800/zm long): fig. 1, ext. rt. lat. ; fig. 2, ext. It. lat.
Scale A (200/zm; x 118), figs. 1, 2.

Stereo-Atlas of Ostracod Shells 11, 147 Bairdia kalakotensis (3 of 4)

Carapace elongate. Dorsal margin sub-arched, posterodorsal slope long and somewhat concave in
posterior region, ventral margin fairly straight and inclined upward anteriorly, making pronounced
anteroventral angle. Anterior end broadly rounded, posterior end angularly rounded. Left valve
larger than right and overlaps all along dorsal margin and mid-ventral margin. Height is half length;
highest part of carapace at mid-length. Carapace ovate in dorsal and ventral views, compressed at
anterior and posterior ends; dorsal and ventral margins curved. Valves punctate.

B. kalakotensis differs from B. beraguensis Singh & Tewari (see Stereo-Atlas of Ostracod Shells 11,
141-144, 1984) in not having a beak like projection at the posterior end, and its more arched dorsai
margin and convex ventral margin distinguish it from B. jammuensis Singh & Tewari. Its elongate
carapace in lateral view and its broadly rounded anterior end separate Bairdia kalakotensis from
Bairdoppilata kalakotensis Singh & Tewari (see Stereo-Atlas of Ostracod Shells, 11, 137-140, 1984).
Bairdia kalakotensis occurs in the late early Eocene Kalakot Formation of the Subathu Group
exposed in Jammu and Kashmir State, India.

Diagnosis:

Remarks:

Distribution:

Explanation of Plate 11, 148

Fig. 1, car., ext. rt. lat. (paratype, L.U. 211, 840 /zm long); figs. 2, 3, car. (holotype, L.U. 210, 800 /zm long): fig. 2, ext. dors.; fig. 3, ext.
vent.

Scale A (200 /zm; x 116), fig. 1 ; Scale B (200 /zm; x 91), fig. 2; scale C (200 /zm; x 98), fig. 3.

Bairdia kalakotensis (2 of 4)

Stereo- Atlas of Ostracod Shells 11, 146

Stereo- Atlas of Ostracod Shells 11, 148

Bairdia kalakotensis (4 of 4)

Stereo-Atlas of Ostracod Shells 11 (29) 149-150 (1984)

Index, Volume 11, 1984 (1 of 2)

General Index

Al-Bashir, J. M. T. & Keen, M.C., On Archeocosta alkazwinii Al-Bashir & Keen gen. et sp. nov.; 83-90

Al-Furaih, A. A. F., On Loxocortcha amygdalanux Bate & Gurney; 107-110

Al-Furaih, A. A. F., On Loxoconcha multiornata Bate & Gurney; 99-102

Al-Furaih, A. A. F., On Loxoconcha undulata Al-Furaih sp. nov.; 103-106

alkazwinii, Archeocosta ; 83-90

amygdalanux, Loxoconcha ; 107-1 10

Archeocosta alkazwinii Al-Bashir & Keen gen. et sp. nov.; 83-90

Athersuch, J. & Horne, D. J., On Paracytheridea cuneiformis (Brady); 53-58

Atjehella kingmai Keij; 59-62

Bairdia beraguaensis Singh & Tewari; 141-144

Bairdia kalakotensis Singh & Tewari; 145-148

Bairdoppilata kalakotensis Singh & Tewari; 137-140

beraguaensis, Bairdia ; 141-144

bohemica, Piretopsis (Cerninella) ; 127-136

bonanzaensis, Cytherelloidea; 63-66

Colin, J. P., On Donmacythere damottae (Colin); 71-74

cuneiformis, Paracytheridea ; 53-58

Cytherelloidea bonanzaensis Keij ; 63-66

Cytheridea (Cytheridea) muelleri muelleri (V. Munster); 29-36

Cvtheridea (Cytheridea) muelleri toenisbergensis Weiss; 37-44

Cytheridea ( Cytheridea ) pernota Oertli & Keij; 45-52

damottae, Donmacythere ; 71-74

Donmacythere damottae (Colin); 71-74

Duringia spinosa (Kniipfer); 9-12

Duringia triformosa Jones sp. nov.; 13-16

eocontractula, Ogmoconcha; 67-70

Finger, K. L., On Hamanella implexa Finger; 17-20

Hamanella implexa Finger; 17—20

hammanni, Raimbautina; 111-118

Hasan, M., On Atjehella kingmai Keij; 59-62

Hasan, M., On Cytherelloidea bonanzaensis Keij; 63-66

Hippula (Cetona) turris (Schallreuter); 1-4

Horne, D. J. & Athersuch, J., On Paiacytheridea cuneiformis (Brady); 53-58
implexa, Hamanella ; 17-20

Jones, C. R., On Duringia triformosa Jones sp. nov.; 13-16
kalakotensis, Bairdia; 145-148
kalakotensis, Bairdoppilata; 137-140

Keen, M. C., On Leocytheridea polled Keen gen. et sp. nov.; 75-82

Keen, M. C. & Al-Bashir, J. M. T., On Archeocosta alkazwinii Al-Bashir & Keen gen. et sp. nov., 83-90
kingmai, Atjehella ; 59-62

Kruta, M. & Schallreuter, R. E. L., On Platybolbina runica Schallreuter & Kruta sp. nov.; 123-126

Kruta, M., Schallreuter, R. E. L. & Siveter, D. J., On Piretopsis (Cerninella) bohemica (Barrande); 127-136

Leocytheridea polled Keen gen. et sp. nov.; 75-82

Lippea Schallreuter subgen. nov.; 5-8

lippensis, Schallreuteria (Lippea) ; 5-8

Loxoconcha amygdalanux Bate & Gurney; 107-110

Loxoconcha undulata Al-Furaih sp. nov.; 103-106

Loxoconcha multiornata Bate & Gurney; 99-102

Maybury, C. & Whatley, R. C., On Sagmatocythere paracercinata Whatley & Maybury sp. nov.; 21-24
Maybury, C. & Whatley, R. C., On Sagmatocythere pseudomultifora Maybury & Whatley sp. nov.; 25-28
muelleri muelleri, Cytheridea (Cytheridea) ; 29-36
muelleri toenisbergensis, Cytheridea (Cytheridea) ; 37-44
multiornata, Loxoconcha ; 99-102

Neale, J. W. & Singh, P., On Bairdoppilata kalakotensis Singh & Tewari; 137-140

oculata, Schuleridea (Aequacytheridea) ; 91-98

Ogmoconcha eocontractula Park sp. nov.; 61 -ID

paracercinata, Sagmatocythere; 21-24

Paracytheridea cuneiformis (Brady); 53-58

Park, Se-Moon, On Ogmoconcha eocontractula Park sp. nov.; 61 -ID

pernota, Cytheridea (Cytheridea) ; 45-52

Piretopsis (Cerninella) bohemica (Barrande); 127-136

Platybolbina runica Schallreuter & Kruta sp. nov.; 123-136

polled, Leocytheridea ; 75-82

pseudomultifora, Sagmatocythere ; 25-28

Raimbautina hammanni Vannier gen. et sp. nov.; 111-118

rorei, Thibaudna ; 119-122

runica, Platybolbina ; 123-126

Sagmatocythere paracercinata Whatley & Maybury sp. nov.; 21-24
Sagmatocythere pseudomultifora Maybury & Whatley sp. nov.; 25-28
Schallreuter, R. E. L., On Duringia spinosa (Kniipfer); 9-12
Schallreuter, R. E. L., On Hippula (Cetona) turris (Schallreuter); 1-4

Schallreuter, R. E. L., On Schallreuteria (Lippea) lippensis Schallreuter subgen. et sp. nov.; 5-8
Schallreuter, R. E. L. & Kruta, M. On Platybolbina runica Schallreuter & Kruta sp. nov.; 123-126
Schallreuter, R. E. L., Siveter, D. J. & Kruta, M., On Piretopsis (Cerninella) bohemica (Barrande); 127-136
Schallreuteria (Lippea) lippensis Schallreuter subgen. et sp. nov.; 5-8
Schuleridea (Aequacytheridea) oculata Moos; 91-98

Stereo-Atlas of Ostracod Shells 11 (29) 150 (1984)

Index, Volume 11 , 1984 ( 2 of 2)

Singh, P., On Bairdia beraguaensis Singh & Tewari; 141-144
Singh, P., On Bairdia kalakotensis Singh & Tewari; 145-148
Singh, P. & Neale, J. W., On Bairdoppilata kalakotensis Singh & Tewari; 137-140

Siveter, D. J., Schallreuter, R. E. L. & Kruta, M., On Piretopsis (Cerninella) bohemica (Barrande); 127-136
spinosa, Duringia ; 9-12

Thibautina rorei Vannier gen. et sp. nov.; 119-122
triformosa, Duringia ; 13—16
turris, Hippula (Cetona) ; 1-4
undulata, Loxoconcha ; 103-106

Vannier, J., On Raimbautina hammanni Vannier gen. et sp. nov.; 111-118
Vannier, J., On Thibautina rorei Vannier gen. et sp. nov.; 119-122
Weiss, R. H., On Cytheridea (Cytheridea) muelleri muelleri (V. Munster); 29-36
Weiss, R. H., On Cytheridea (Cytheridea) muelleri toenisbergensis Weiss; 37-44
Weiss, R. H., On Cytheridea ( Cytheridea ) pernota Oertli & Keij; 45-52
Weiss, R. H., On Schuleridea (Aequacytheridea) oculata Moos; 91-98

Whatley, R. C. & Maybury, C., On Sagmatocythere paracercinata Whatley & Maybury sp. nov.; 21-24
Whatley, R. C. & Maybury, C., On Sagmatocythere pseudomultifora Maybury & Whatley sp. nov.; 25-28

Index; Geological Horizon

See 1 (2) 5-22 (1973) for explanation of the Schedules in the Universal Decimal Classification

(113.311)

(113.312)

(113.313)

(116.212)

(116.331)

Lower Ordovician:

Thibautina rorei', 119-122
Middle Ordovician:

Duringia triformosa ', 13-16
Hippula (Cetona) turns ', 1-4
Piretopsis (Cerninella) bohemica ', 127-136
Raimbautina hammanni', 111-118
Schallreuteria (Lipped) lippensis ; 5-8
Upper Ordovician:

Duringia spinosa ', 9-12
Platybolbina runica; 123-126
Middle Liassic:

Ogmoconcha eocontractula; 61 -ID
Cenomanian:

Archeocosta alkazwinii', 83-90
Donmacythere damottae', 71-74

(116.332) Turonian:

Archeocosta alkazwinii ; 83-90
(116.333.3) Santonian:

Archeocosta alkazwinii', 83-90

(118.14) Eocene:

Bairdia beraguaensis ; 141-144
Bairdia kalakotensis', 145—148
Bairdoppilata kalakotensis', 137-140

(118.15) Oligocene:

Cytheridea (Cytheridea) muelleri muelleri',
29-36

Cytheridea (Cytheridea) muelleri

toenisbergensis ; 37-44

Cytheridea (Cytheridea) pernota ', 45-52

Hamanella implexa ; 17-20

Leocytheridea polled ', 75-82

Schuleridea (Aequacytheridea) oculata ; 91-98

(118.21) Miocene:

Hamanella implexa \ 17-20

(118.22) Pliocene:

Sagmatocythere paracercinata; 21-24
Sagmatocythere pseudomuldfora ; 25-28
(1 19.9) Recent:

Atjehella kingmai ; 59-62
Cytherelloidea bonanzaensis; 63-66
Loxoconcha amygdalanux ; 107-110
Loxoconcha muldornata; 99-102
Loxoconcha undulata', 103-106
Paracytheridea cuneiformis ; 53-58

(267.8)

(411)

(420)

(429)

(430.1)

(430.2)

Index; Geographical Location

See 1 (2) 5-22 (1973) for explanation of the Schedules in the Universal Decimal Classification

Persian Gulf:

Loxoconcha amygdalanux ; 107-110
Loxoconcha muldornata; 99-102
Loxoconcha undulata ; 103-106
Scotland:

Paracytheridea cuneiformis', 53-58
England:

Ogmoconcha eocontractula ; 61 -ID
Paracytheridea cuneiformis ; 53-58
Sagmatocythere paracercinata ', 21-24
Sagmatocythere pseudomuldfora ; 25-28
Wales:

Duringia triformosa ; 13-16
German Federal Republic:

Cytheridea ( Cytheridea) muelleri muelleri ;
29-36

Cytheridea (Cytheridea) muelleri
toenisbergensis ; 37-44
Cytheridea (Cytheridea) pernota ', 45-52
Schallreuteria (Lippea) lippensis ; 5—8
Schuleridea (Aequacytheridea) oculata; 91-98
German Democratic Republic:

Duringia spinosa ; 9-12
Hippula (Cetona) turris; 1-4

(437) Czechoslovakia:

Piretopsis (Cerninella) bohemica ; 127-136
Platybolbina runica ; 123-126
(44) France:

Donmacythere damottae ; 71-74
Raimbautina hammanni; 111-118
Thibautina rorei; 119-122
(540) India:

Bairdia beraguaensis ; 141-144
Bairdia kalakotensis; 145-148
Bairdoppilata kalakotensis; 137-140
(567) Iraq:

Archeocosta alkazwinii ; 83-90
(595) Malaysia:

Atjehella kingmai; 59-62
Cytherelloidea bonanzaensis ; 63—66

(664) Sierra Leone:

Leocytheridea polled ; 75-82
(794) California:

Hamanella implexa ; 1 7-20

Stereo- Atlas of Ostracod Shells: Vol. 11, Part 2

CONTENTS

11 (16) 75-82
11 (17) 83-90

11 (18) 91-98
11 (19) 99-102
11 (20) 103-106
11 (21) 107-110
11 (22) 111-118
11 (23) 119-122
11 (24) 123-126

11 (25) 127-136

11 (26) 137-140
11 (27) 141-144
11 (28) 145-148
11 (29) 149-150

On Leocytheridea polled Keen gen. et sp. nov.; by M. C. Keen.

On Archeocosta alkazwinii Al-Bash-ir & Keen gen. et sp. nov.; by J. M. T.
Al-Bashir & M. C. Keen

On Shuleridea (Aequacytheridea) oculata Moos; by R. H. Weiss
On Loxoconcha muldornata Bate & Gurney; by A. A. F. Al-Furaih
On Loxoconcha undulata Al-Furaih sp. nov; by A. A. F. Al-Furaih
On Loxoconcha amygdalanux Bate & Gurney; by A. A. F. Al-Furaih
On Raimbaudna hammanni Vannier gen. et sp. nov.; by J. Vannier
On Thibaudna rorei Vannier gen. et sp. nov.; by J. Vannier
On Platybolbina runica Schallreuter & Kruta sp. nov.; by R. E. L.
Schallreuter & M. Kruta

On Piretopsis (Cerninella) bohemica (Barrande); by R. E. L. Schallreuter,
D. J. Siveter & M. Kruta

On Bairdoppilata kalakotensis Singh & Tewari; by J. W. Neale & P. Singh
On Bairdia beraguaensis Singh & Tewari; by P. Singh
On Bairdia kalakotensis Singh & Tewari; by P. Singh
Index for Volume 11, 1984

Prepaid annual subscription (valid for Volume 12, 1985)
Individual subscription £22.00 or US $50.00 for 2 parts (post free)
Price per Part: £22.00 or US $50.00
Institutional subscription £45.00 or US $85.00 for 2 parts (post free)
Price per Part: £40.00 or US $75.00

Back volumes: Vol. 1 (4 Parts): £20.00; price per Part: £5.00
Vol. 2 (4 Parts): £28.00; price per Part: £7.00
Vol. 3 (2 Parts): £24.00; price per Part: £12.00
Vol. 4 (2 Parts): £30.00; price per Part: £15.00
Vol. 5 (2 Parts): £32.00; price per Part: £16.00
Vol. 6 (2 Parts): £40.00; price per Part: £20.00
Vol. 7 (2 Parts): £40.00; price per Part: £20.00
Vol. 8 (2 Parts): £60.00; price per Part: £30.00
Vol. 9 (2 Parts): £60.00; price per Part: £30.00
Vol. 10 (2 Parts): £60.00; price per Part: £30.00
Vol. 11 (2 Parts): £60.00; price per Part: £30.00

Postage extra in sales of all back Parts
No trade discount is allowed on the subscription rate

Orders should be addressed to: Dr R. C. Whatley,
Department of Geology,

University College of Wales,

Aberystwyth, Dyfed.

Cheques should be made payable to B.M.S. (Stereo-Atlas Account)

SPECIAL OFFER

50 % off all back part prices if
you become a subscriber to the Atlas