I REPRINTED JANUARY 1991 l

A Stereo -Atlas of Ostracod Shells

edited by R. H. Bate, J. W. Neale, Lesley M. Sheppard

and David J. Siveter

Volume 6, Part 1; 29th June 1979

Published by The British Micropalaeontological Society
in association with Robertson Research International Ltd., Llandudno, Wales

Editors

Dr. R.H. Bate, Department of Palaeontology, British Museum (Natural History), Cromwell Road,
London SW7 5BD.

Prof. J. W. Neale, Department of Geology, The University, Hull HU6 7RH.

Ms. Lesley M. Sheppard, Department of Palaeontology, British Museum (Natural History),
Cromwell Road, London SW7 5BD.

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

Editorial Board

Dr. Richard H. Benson, Smithsonian Institution, Washington, D.C., 20560. U.S.A.

Dr. Alwine Bertels, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires,

Argentina.

Dr. K. Ishizaki, Institute of Geology and Paleontology, Tohoku University, Sendai, Japan.

Dr. C.W. Haskins, Robertson Research International Limited, ‘Ty’n-y-Coed’, Llanrhos, Llandudno,
N. Wales, LL30 ISA.

Dr. P.J. Jones, Bureau of Mineral Resources, P.O. Box 378, Canberra City, A.C.T 2601 , Australia.
Prof. Dr. E. Kempf, Geologisches Institut der Universitat Koln, Ziilpicher StrasSe 49, D-5 Koln 1,
German Federal Republic.

Dr. H.J. Oertli, S.N.P.A., Centre de Recherches, 64001 Pau, France.

Prof. G. Ruggieri, Instituto e Museo di Geologia dell’Universita di Palermo, Corso Tukory, 131,
90134 Palermo, Italy.

Mr. P.F. Sherrington, Petro-Canada, P.O. Box 2844, Calgary, Alberta T2P 2M7, Canada.

Instructions to Authors

Contributions illustrated by scanning electron micrographs of Ostracoda in stereo-pairs are invited.
Full instructions may be obtained on request from any one of the Editors or Editorial Board. Format
should follow the style set by the majority of papers in this issue. Descriptive matter apart from
illustrations should be cut to a minimum; preferably each plate should be accompanied by one page
of text only. Blanks to aid in mounting figures for plates may be obtained from the Editors.
Completed papers should be sent to Ms. L.M. Sheppard, Department of Palaeontology, British
Museum (Natural History), Cromwell Road, London SW7 5BD.

Acknowledgments

This Volume of the Stereo-Atlas has been aided by generous financial support from Robertson
Research International Limited.

Stereo -viewing for users of the Atlas

In order to obtain maximum information and benefit from the use of the Stereo-Atlas it is essential
that the user view the micrographs stereoscopically. Small pocket-sized stereo-viewers are most
suitable for this purpose. Two suppliers are:

C.F. Casella & Co. Ltd., Regent House, Britannia Walk, London N1 7ND, and
Air Photo Supply Corpn., 158 South Station, Yonkers, New York 10705. U.S.A.

The front cover shows a female (external & internal views) of Cativella bensoni Neale

Stereo- Atlas of Ostracod Shells 6(1) 1—4 (1979)

595.337.14 (1 16.312) (427.4:162.000.54) : 551.351 + 552.52

Schuleridea hammi (1 of 4)

ON SCHULERIDEA HAMMI (TRIEBEL)

by John W. Neale
(University of Hull, England)

1938

1956

1963

Schuleridea hammi (Triebel 1938)

Cytheridea (Haplocytheridea) hammi n. sp. E. Triebel, Senckenbergiana, 20, 484 - 5, pi. 3, figs. 42 - 47.

Schuleridea hammi (Triebel); G. Deroo, Institut Franqais du Pe'trole, 11, 1512 (not figured).

Schuleridea hammi (Triebel); P. Kaye, Revue de Micropaldontologie, 6 ( 1 ), 3 1 - 2, pi. 2, figs. 5-8.

Holotype: Senckenberg Museum, Frankfurt am Main, No. X/e 122a, d LV.

Type locality: Kastendamm near Hannover.

Age: Aptian.

Figured specimens: University of Hull coll. nos. HU.19.C.15.3 (9 LV: PI. 6, 2, fig. 1), HU.19.C.15.1 (d LV: PI. 6, 2, fig. 2),
HU.19.C.15.5 (d RV: PI. 6,4, fig. 1), HU.19.C.15.3 (9 LV: PI. 6,4, fig. 2). All specimens from Upper B
Beds, Coastal Section, Speeton Clay, Speeton,E. Yorks, England; lat. 54°10'N, long. 0°14'40"W. Upper
Barremian.

Explanation of Plate 6, 2

Fig. 1, 9 LV, ext. lat. (HU. 19.C. 1 5.3, 796 long); fig. 2, d LV, ext. lat. (HU. 1 9.C. 1 5. 1 , 880 ^tm long).

Scale A (100 pm; x 107), figs. 1 , 2.

-F-

i-i— i—

— h— -i —

Stereo- Atlas of Ostracod Shells 6, 3

Schuleridea hammi (3 of 4)

Remarks: In side view valves taper markedly posteriorly and are strongly pitted. Eye tubercle weak and hinge
structure relatively weak compared with other species of Schuleridea

Distribution: This species is characteristic of the Upper Barremian of Britain and N. Germany. In Germany it ranges up
into the Lower Aptian and has been recorded from beds placed in the lowest Aptian at Speeton in the
North of England; so far it has not been noted in the Aptian of S. England. Recently, E. Kemper (1975
Ber. Naturhist. Ges. 119, 54 - 55 et al.) has recorded it from the higher Aptian nutfieldensis and
melchioris zones in boreholes west of Peine in the centre of the basin north and east of Hannover. In
Denmark, O. B. Christensen (1973 Geol. Sun1. Denmark III Series 40, 1 15) has noted it in the Upper
Barremian of the N0vling No. 1 well in Central Jutland.

Explanation of Plate 6, 4

Fig. 1 , d RV, ext. lat. (HU.19.C.15.5, 840 long); fig. 2, 9 LV, int lat. (HU.19.C.15.3, 196 pm long).
Scale A ( 100 pm;x 109), fig. 1 ; scale B ( 1 00 pm; x 116), fig. 2.

Stereo-Atlas of Ostracod Shells 6 (2) 5 — 12 (1979) Cativella bensoni { 1 of 8)

595.337.14 (1 19.9) (269.5:164.027.76 + 269.7:163.166.78 + 269.7:163.160.78 + 269.7:163.167.79) : 551.35 (26.03:24.08.67
448)

ON CATIVELLA BENSONI NEALE

by John W. Neale
(University of Hull, England)

Cativella bensoni Neale 1967

1880 Cythere polytrema Brady; G. S. Brady, Rept. Sci. Res. Voyage H. M. S. Challenger, 1873 ■ 76. Zoology 1, pt 3, 87, pi.
21, fig. 5 a - h.

1916 Cythere polytrema Brady; F. Chapman, in: Brit. Antarct. Exped. 1907 - 9, Rept. Sci. Inv. Geology 2, 50, pi. 6, fig. 3.

1964 Cativella sp., R. H. Benson, Univ. Kans, Paleont. Contr. Arthropoda no. 6, 32 - 3, text-fig. 23.

1967 Cativella bensoni sp. nov., J. W. Neale, Brit. Antarct. Surv. Sci. Repts. No. 58, 30 - 2, pi. 3 a, b, d, f, f ', f”; pi. 4 f, g, h, h';
text-fig. 10.

non 1878 Cythere polytrema sp. nov., G. S. Brady, Trans, zool. Soc. Lond., 10, 393, pi. 66, fig. 1 a - d.

Holotype: HU.13.R.12.1, ? car.

[paratypes: HU.13.R.12.2 - 20 and Brit. Mus. (Nat. Hist.) coll. no. 1966.7.13.1 (16 specimens)] .
Type locality : Halley Bay, Coats Land, Antarctica (approx, lat. 75°30'S, long. 26°40'W) from pale grey, silty sand at
1 13 fathoms.

Figured specimens: University of Hull coll. nos. HU.13.R.12.1 (9 car.: PI. 6, 6, fig. 1; PI. 6, 12, fig. 2), HU. 215. R. 2a (9 RV:
PI. 6, 6, fig. 2), HU. 215. R. 6a (d LV: PI. 6, 8, fig. 1 ; d RV: PI. 6, 8, fig. 2), HU.215.R.la (9 RV: PI. 6, 10,
fig. 1; PI. 6, 12, fig. 1; 9 LV: PI. 6, 10, fig. 2; PI. 6, 12, fig. 3). HU.13.R.12.1 from 113 fathoms, Halley
Bay, Coats Land, Antarctica (approx, lat. 75°30'S, long. 26°40'W). All other figured material from 67
metres through a hole in the Ross Ice Shelf at White Island (lat. 78°4'S, long. 167°25'E).

Explanation of Plate 6, 6

Fig. 1, 9 car., ext. It. lat. (holotype, HU.l 3.R. 1 2. 1 , 1117 pm long); fig. 2, 9 RV, ext. lat. (HU. 215. R. 2a, 1 148 pm long).

Scale A (200 ^m; x 84), figs. 1, 2.

-P-

L-l-*—

Stereo-Atlas of Ostracod Shells 6, 7

Cativella bensoni (3 of 8)

Diagnosis: Adults with heavy reticulate ornamentation in which small tubercles develop at the junction of ridges. A
main row of some seven squarish spines occurs antero-ventrally and about 10 prominent spines lie sub-
parallel to the length posteriorly, of which the postero-ventral are the longest. Copulatory appendage
distinctive with hemipenes triangular and showing sigmoidal curvature. Brush organ well developed.
Antenna with well developed elliptical club-shaped sensor and two-jointed exopodite.

Remarks: Material kindly sent me by Dr. Ensor of the University of Canterbury, New Zealand enables the soft
parts to be figured for the first time. This was collected from 67 metres through a hole in the Ross Ice
Shelf at White Island (78°4'S, 167°25'E), the bottom being steeply sloping and a mixture of basaltic fine
gravel and cobbles heavily encrusted with hydroids and bryozoa. Benson (1964) obtained a single RV in a
core from 448 metres in the same general area. Chapman (1916) also recorded this species (as
C. polytrema ) in this area from raised deposits on the slopes of Mt. Erebus. The type material of
C. bensoni comes from Halley Bay on the other side of Antarctica. Brady (1880) found a few valves at
Prince Edward Island, mostly juveniles, but one, corresponding in size to the penultimate instar, shows
adult type ornamentation. At present there are no grounds for excluding this from the present species.
Juveniles are lightly calcified and ornamented and are fully described in Neale (1967). If one excludes
Benson’s single RV, all the material came from depths between 67 and 206 metres and the species may be
regarded as essentially neritic.

Explanation of Plate 6, 8

Fig. 1 , 6 LV, ext. lat. (HU. 21 5.R.6a, 1108 long); fig. 2, 6 RV, ext. lat. (HU. 21 5.R.6a, 1 100 pm long).
Scale A (200 pm ; x 86), figs. 1,2.

Stereo-Atlas of Ostracod Shells 6, 6

Cativella bensoni (2 of 8)

Stereo-Atlas of Ostracod Shells 6, 8

Cativella bensoni (4 of 8)

Stereo-Atlas of Ostracod Shells 6, 9

50/um

Cativella bensoni (5 of 8)

Male Specimen HU. 215.R.6b

Antennule

Text-fig. 1

Explanation of Plate 6, 10

Fig. 1,9 RV, int. lat. (HU.215.R.la, 1 144 /xm long); fig. 2, 9 LV, int. lat. (HU.215.R.la, 11 12 long).
Scale A (200 /im; x 82), figs, 1, 2.

Stereo-Atlas of Ostracod Shells 6, 1 1
Male Specimen

HU. 215.R.6b

Cativella bensoni (7 of 8)

Text-fig. 2

Copulatory Appendage

Explanation of Plate 6, 1 2

Fig. 1, 9 RV, int. obi. ant. tooth and ocular sinus (HU. 215. R. la, 1112 ,um long); fig. 2, 9 car., ext. dors, (holotype, HU.13.R.
12.1, 1117 /urn long); fig. 3, 9 LV, int. obi. ant. tooth and ocular sinus (HU. 21 5. R. la, 1 144 fj. m long).

Scale A (40 /un; x 270), figs. 1,3; scale B (200 /im; x 82), fig. 2.

Stereo-Atlas of Ostracod Shells 6, 10 Cativella bensoni (6 of 8)

Stereo-Atlas of Ostracod Shells 6, 1 2 Cativella bensoni (8 of 8)

Stereo-Atlas of Ostracod Shells 6 (3) 13—20 (1979)

595.337.14 (1 19.9) (261.2:162.014.050) : 551.353 (26.03:24.08.3680 - 3697)

Pelecocythere sylvesterbradleyi (1 of 8)

ON PELECOCYTHERE SYLVESTERBRADLEYI ATHERSUCH gen. et sp. nov.

by John Athersuch

(B.P. Research Centre, Sunbury-on-Thames, England)

Genus PELECOCYTHERE gen. nov.

Type species: Pelecocythere sylvesterbradleyi sp. nov.

Derivation of name: Pelex, pelekos, Greek; a helmet + Cythere. Gender, feminine.

Diagnosis: Carapace with carinate alae and flattened ventral surface. Alae perforated by large pore canals which
terminate in sieve-pores dorsally and ventrally. Hinge antimerodont.

Pelecocythere sylvesterbradleyi sp. nov.

Holotype: Brit. Mus. (Nat. Hist.) no. 1978.463, d car. + appendages.

[Paratypes: 1978.460-462,464.]

Type locality: Discovery station 9756, haul 14, in the abyssal NE Atlantic off SW Ireland: lat. 50°04.0' - 50°04.3'N,
long. 13°55.6' - 13°53.2'W; depth 3680 - 3697m; date 15.4.1978; Recent.

Explanation of Plate 6, 14

Fig. 1, d LV, ext. lat. (paratype, 1978.460, 1670 pm long); fig. 2, 9 RV, ext. lat. (paratype, 1978.461, 1 700 pm long); fig. 3, $
RV, dors, sieve-pore (paratype, 1978.462).

Scale A (500 pm; x 34), figs. 1,2; scale B (5 pm; x 2150), fig. 3.

4—

-t™

Stereo-Atlas of Ostracod Shells 6, 1 5

Pelecocythere sylvesterbradleyi (3 of 8)

Derivation of name: In honour of the late Professor P. C. Sylvester-Bradley.

Figured specimens: Brit. Mus. (Nat. Hist.) nos. 1978.460 (d; LV: PI. 6, 14, fig. 1; appendages: Text-figs. 1, 2), 1978.461 (9;

RV: PI. 6, 14, fig. 2; PI. 6, 16, fig. 3;LV: PI. 6, 18, figs. 2, 3; PI. 6, 20,figs. 1,3, 5), 1978.462 (9 car.: PI.
6, 14, fig. 3; PI. 6, 16, fig. 1), 1978.463 (holotype, d car.: PI. 6, 16, fig. 2), 1978.464 (d RV: PI. 6, 18,
fig. 1 ; PI. 6, 20, figs. 2, 4). All specimens from the type locality, Discovery station 9756, haul 14;
collected with an epibenthic sledge (see Aldred et al., 1976, Deep-Sea Research 23: 167 - 174) 15.4.78
during R. R. S. Discovery ’ cruise 92

Diagnosis: As for genus.

Distribution: Known only from the type locality.

Remarks: The four adductor muscle scars are subdivided; the upper three into two, the lower one into three. Large
pores, similar to those perforating the alae are present dorsally in the left valve (see PI. 6, 18, fig. 2,
herein). A narrow accomodation groove is present in the left valve, while the right valve bears a long spine
posteriorly.

Cytheropteron fenestratum Brady (see Brady, 1880, Rep. scient. Results Voy. Challenger
(Zoology) 1 (3): 139, pi. 24, figs. 6a - d; Puri & Hulings, 1976, Bull. Br. Mus. nat. Hist. (Zool.) 29 (5):
306, pi. 24, figs. 1 - 6) which, externally, bears a superficial resemblance to the present species, differs
from it in having a pentadont hinge, five elongate adductor muscle scars and in lacking the large alar pore
canals characteristic of Pelecocythere.

Explanation of Plate 6, 16

Fig. 1, 9 car. dors, (paratype, 1978.462, 1610 long); fig. 2, d car. vent, (holotype, 1978.463, 1690 ,um long); fig. 3, 9 RV,
details of ala (paratype, 1978.461).

Scale A (500 pm; x 34), figs. 1,2; scale B (50 pm\ x 270), fig. 3.

Pelecocy there sylvesterbradleyi (4 of 8)

Stereo-Atlas of Ostracod Shells 6, 14

Pelecocythere sylvesterbradleyi (2 of 8)

Stereo- Atlas of Ostracod Shells 6, 16

I I I
4-4-4

Stereo-Atlas of Ostracod Shells 6,17

Pelecocythere sylvesterbradleyi (5 of 8)

Explanation of Plate 6, 18

Fig. 1 , <5 RV, int. lat. (paratype, 1978.464, 1720 //m long); fig. 2, 9 LV, int. lat. (paratype, 1978.461, 1640 fxm long); fig. 3, 9
LV, int., oblique dorsal view showing alar pore canals (paratype, 1978.461).

Scale A (500 /^m; x 34), figs. 1 - 3.

-44— • —

Stereo-Atlas of Ostracod Shells 6, 19

Pelecocythere sylvesterbradleyi (7 of 8)

Explanation of Plate 6, 20

Fig. 1, 9 LV, int. muse. sc. (paratype, 1978.461); figs. 2, 4, 6 RV, terminal hinge elements (paratype, 1978.464); figs. 3, 5, 9
LV, terminal hinge elements (paratype, 1978.461).

Scale A (50 //m; x 290), fig. 1 ; scale B (100 /xm\ x 170), figs. 2 - 5.

Stereo-Atlas of Ostracod Shells 6, 20

Pelecocythere sylvesterbradleyi (8 of 8)

~j- -

Stereo-Atlas of Ostracod Shells 6, 1 8

Pelecocythere sylvesterbradleyi (6 of 8)

4-44

mT

I

I

I

j Stereo- Atlas of Ostracod Shells 6 (4) 21— 26 (1979) Zabythocypris redunca (1 of 6)

i 595.337.1 1 (1 19.9) (261.7:162.019.017) : 551.353 (26.03 : 24.08.3053 - 3155)

ON ZABYTHOCYPRIS REDUNCA ATHERSUCH & GOOD AY sp. nov.

by John Athersuch & Andrew Gooday

(BP Research Centre, Sunbury and Institute of Oceanographic Sciences, Wormley )

Zabythocypris redunca sp. nov.

Holotype: Brit. Mus. (Nat. Hist.) no. 1978.456; 9 car. and appendages.

[Paratypes: 4 specimens; B. M. (N. H.) nos. 1978.457 - 459, 466.]

Type locality: Discovery station 8528, haul 1, in the abyssal NE Atlantic off Mauritania; lat. 17°38.3' - 17°38.7'N,
long. 18°34.9' - 18°35.8'W; depth 3150 - 3155m; date 2.7.1974; Recent.

Derivation of name: reduncus, -a, -um, Latin: hooked, curved back.

Figured specimens: Brit. Mus. (Nat. Hist.) no. 1978.456 (9 car.: PI. 6, 22, fig. 1), 1978.457 (9 LV: PI. 6, 22, fig. 2),
1978.458 (<J LV: PL 6, 22, fig. 3), 1978.459 (9 car.; LV: PI. 6, 24, figs. 1, 3; RV: PI. 6, 24, fig. 2). All
specimens collected with an epibenthic sledge (see Aldred etal., 197 6, Deep-Sea Research 23: 167 - 174)
in the abyssal NE Atlantic during R. R. S. Discovery cruise 63 (June - July, 1974).

Explanation of Plate 6, 22

Fig. 1 , 9 car., ext. rt. lat. (holotype, 1978.456, 1 560 pm long); fig. 2, 9 LV, ext. lat. (paratype, 1978.457, 1560 pm long); fig. 3,
d LV, ext. lat. (paratype, 1978.458, 1710 pm long).

Scale A (500 ^m; x 37), figs. 1 - 3.

— M-

p--*-

Stereo-Atlas of Ostracod Shells 6, 23

Zabythocypris redunca (3 of 6)

Figured specimens: 1978.456, 466 are from the type locality. 1978.457, 459 are from Discovery station 8521, haul 1; lat.

(contd.) 20°46.9' -20°47.6'N, long. 18°53.4' - 18°53.5'W; depth 3053 - 3058m. 1978.458 is from station 8532,
haul 1 ; lat. 13°47.8'- 1 3°48.0'N, long. 18°14.0'- 18° 14.8'W; depth 3 1 13 - 3 1 19m.

Diagnosis: A species of Zabythocypris with an acutely-tapering dorsal spine; angle between spine and postero-dorsal
margin <90°. Vibratory plate of fifth limb with three naked, proximally-segregated setae; furca of male
with two subterminal setae; copulatory appendages distinctive.

Remarks: Maddocks (1969, Bull. U.S. natn. Mus. 295 : 102 - 110) introduced the genus Zabythocypris with ?

Bythocypris heterodoxa Chapman (1910, J. Linn. Soc. 30 : 429, pi. 56, fig. 20a, b) as the type species.
Also included in the genus were Bairdia exaltata Brady, 1880, Zabythocypris ancipita Maddocks, 1969
and Z. helicina Maddocks, 1969. All of these species show a close affinity to Bythocypris in the general
shell structure and, where known, details of the appendages, but only those specimens regarded by
Maddocks as Z. heterodoxa bear a dorsal spine on the left valve. We regard this character alone as
diagnostic of the genus Zabythocypris. The other three species, therefore, should be excluded from
Zabythocypris and be placed either in Bythocypris or in another, new, genus.

Maddocks (1969) illustrated two specimens (a male from Peru, fig. 56C, and a female from
Mozambique, fig. 56B) both exhibiting the characteristic dorsal spine, and referred them to Z. heterodoxa
(Chapman). She regarded these specimens as belonging to different sub-species, and the holotype
illustrated by Chapman, 1910 as a juvenile. Both differ in size and shape from Chapman’s specimen and
from each other. We believe, particularly in view of their great geographic separation, that Maddocks’
specimens differ enough from each other and from the holotype of Z. heterodoxa to be regarded as
separate species.

Distribution: Known only from foraminiferal ooze at Discovery stations 8521, 8528 and 8532 on the continental rise
off NW Africa at depths of 3053 - 3 155m.

Explanation of Plate 6, 24

Fig. 1,9 LV, int. lat. (paratype, 1978.459, 1585/^m long); fig. 2, 9 RV, int. lat. (1978. 459, 1585 pm long); fig. 3, 9 LV, muse.

sc. (1978.459). Scale A (500 pm\ x 37), figs. 1,2; scale B (50 pm\ x 295), fig. 3.

|T-

Ft"

Zabythotypris redunca (4 of 6)

H--*-

Stereo-Atlas of Ostracod Shells 6, 22

Stereo-Atlas of Ostracod Shells 6, 24

Zabythocypris redunca (2 of 6)

■HMBaasMnaMnaaMeanMMnMMnHBaBMpHBiinBnMiBKHMBaHBa

Stereo-Atlas of Ostracod Shells 6, 25

Zabythocypris redunca (5 of 6)

— ! — -i —

Stereo-Atlas of Ostracod Shells 6, 26

Zabythocypris redunca (6 of 6)

d copulatory
appendage +
furcal ramus
1978.458

J 9 genital lobe
+ furcal ramus
1978.458

100 pm

Text-fig. 2

-I — (-

Stereo-Atlas of Ostracod Shells 6 (5) 27 - 30 (1979)
595.337.14 (1 19.9) (267.35:161.024.54) : 551.351

Paijenborchellina alata (1 of 4)

ON PAIJENBORCHELLINA ALATA GURNEY sp. nov.

by Ann R. Gurney

(British Museum [Natural History] , London)

Paijenborchellina alata sp. nov.

Holotype: Brit. Mus. (Nat Hist.) 1979.1 33, 9 car.

[Paratypes: Brit. Mus. (Nat. Hist.) 1979.134 - 1 44 J .

Type locality: Abu Dhabi lagoon (central terrace), Persian Gulf; approx, lat. 24°32'N, long. 54°27'E.

Derivation of name: Referring to alate process.

Figured specimens: Brit. Mus. (Nat. Hist.) nos. 1979.133 (holotype, 9 car.: PI. 6, 28, fig. 1; PI. 6, 30, fig. 1), 1979.134 (d

car.: PI. 6, 30, fig. 3), 1979.135 (c? car.: PI. 6, 30, fig. 7), 1979.136 (9 car.: PI. 6, 30, fig. 6), 1979.137 (9

car.: PI. 6, 30, fig. 2), 1979.138 (-1 instar, LV: PI. 6, 30, fig. 5), 1979.140 (9 car., RV: PI. 6, 28, fig. 2;

LV: PI. 6, 28, fig. 3, PI. 6, 30, fig. 4). 1979.134 - 138, 140 are from Abu Dhabi lagoon (back lagoon

terrace), Persian Gulf. All specimens described here were collected by Dr. G. Evans, Imperial College of
Science, London.

Explanation of Plate 6, 28

Fig. 1 , 9 car., ext. It. lat. (nurotype, 1979.133, 680 pm long); fig. 2, 9 car.: RV, int. lat. (paratype, 1979. 140, 691 pm long); fig.

3, 9 car.: LV, int. lat. (paratype, 1979.140, 697 pm long).

Scale A (250 pm; x 88), fig. 1 ; scale B (250 pm] x 86), figs. 2, 3.

Stereo-Atlas of Ostracod Shells 6, 29

Paijenborchellina alata (3 of 4)

Diagnosis: Species of Paijenborchellina possessing short, stout, alae; posterior part of alae more strongly developed
than anterior part. Carapace surface almost smooth with weak reticulations and pitting antero-ventrally,
postero-dorsally. Dorsal margin upraised and thickened.

Remarks: P. alata sp. nov. is the only Recent, smooth, alate Paijenborchellina recorded and cannot be confused with
any previously described species. The males are more elongate, with less distinct alae than the females; the
alae are also unequally developed in both dimorphs with the left valve ala tending to be more strongly
developed. Hinge antimeridont, not truly characteristic of the Cytheruridae (where the hinge is
peratodont) into which family this genus is normally placed. The adductor muscle scars are situated
within a shallow depression that is reflected on the outside of the shell by a muscle scar node that is
tuberculate in some individuals. Twelve long, straight, marginal pore canals are present around the anterior
margin. Caudal process in -1 instar of variable length. The muscle scars are shown clearly in this species:
the lower adductor muscle scar is unusually offset to the rear with respect to the other three. The crescent
shaped frontal muscle scar is particularly large.

Distribution: P. alata is restricted to the calm waters of the Abu Dhabi lagoon where it occurs on fine terrace sediments.

This is reflected in the morphological appearance: smooth shell and ventrolateral alae. It is presently only
recorded from the Abu Dhabi lagoon although it is almost certainly to be found in similar lagoonal
environments along the Trucial coast; it is not found outside on the near shore shelf sediments where it is
replaced by a recticulate species of Paijenborchellina (see Gurney, Stereo-Atlas of Ostracod Shells 1979 6
Pt. 2, in press).

Explanation of Plate 6, 30

Fig. 1, 9 car., ext. rt. lat. (holotype, 1979.133, 680 pm long); fig. 2, 9 car., ext. dors, (paratype, 1979.137, 688 pm long); fig. 3,
<5 car., ext. rt. lat. (paratype, 1979.134, 671 pm long); fig. 4, 9 LV, int. lat. muse. sc. (paratype, 1979.140, 697 pm long): fig.
5, -1 , instar LV, ext. lat. (paratype, 1979. 138, 552 pm long); fig. 6, 9 car., ext. vent, (paratype, 1979. 1 36, 714 pm long); fig. 7
d car., ext. It. lat. (paratype 1979.135, 671 pm long).

Scale A (200 pm; x 60), figs. 1 , 2, 3, 7; scale B (250 ,am; x 480), fig. 4; scale C ( 130 pm ; x 70), fig. 5 ; scale D (200 pm ; x 50),
fig. 6.

Stereo-Atlas of Ostracod Shells 6, 30

Paijenborchellina alata (4 of 4)

Stereo-Atlas of Ostracod Shells 6, 28

Paijenborchellina alata (2 of 4)

i i i
4'-44

Stereo-Atlas of Ostracod Shells 6 (6) 3 1 —34 (1979)
595.337.14 (1 16.233) (47:161.048.54) : 55 1 .35 1 + 552.52

Galliaecytheridea elegans (1 of 4)

ON GALLIAECYTHERIDEA ELEGANS (SHARAPOVA)

by Nicholas Fuller & Alan Lord
( University College , London )

Galliaecytheridea elegans (Sharapova, 1937)

1937 Eucy there elegans sp. nov. E. G. Sharapova, Trudy NGRI, A 106, 82, pi. II, fig. 19.

1955 Palaeocytheridea elegans (Sharapova, 1937); P. S. Lyubimova, Trudy VNIGRI, new series, 84, 48, pi. Ill, figs, la - b.

Holotype: No. 4 - 20, VNIGRI (All-Union Petroleum Research Geological Prospecting Institute) collection,
Leningrad.

Type locality: Middle reaches of River Emba, Emba Oil Field, U.S.S.R.. ‘Neocomian’ of Sharapova (1937), Lower
Cretaceous?

Figured specimens: Brit. Mus. (Nat. Hist.) OS 11391 (LV: PL 6, 32, fig. 1), OS 1 1392 (LV: PI. 6, 32, fig. 2; PI. 6, 34, fig. 4),
OS 1 1393 (RV: PI. 6, 32, fig. 3), OS 1 1394 (RV: PI. 6, 34, figs. 1 , 3 & 5), OS 1 1395 Guv. RV: PI. 6, 34,
fig. 2). All specimens are from Bed 8 ( Subplanites pseudo scythicus Zone, Lower Volgian) at Gorodische,
25km north of Ul’yanovsk, River Volga, U.S.S.R.. Bed number of Mesezhnikov, M. S. et al. (1977, fig. 1).

Explanation of Plate 6, 32

Fig. 1, LV, ext. lat. (OS 11391, 856 long); fig. 2, LV, int. lat. (OS 11392, 812 pm long); fig. 3, RV, ext. lat. (OS 11393,

781 pm long).

Scale A (200 pm\ x 58), fig. 1 ; scale B (200 pm\ x 63), figs. 2, 3.

-■H— i—

Stereo-Atlas of Ostracod Shells 6, 33

Galliaecytheridea elegans (1 of 4)

Diagnosis: Outline rounded subrectangular, with well-marked cardinal angles and a prominent anterior marginal rim.

Surface covered with shallow pits which become less dense and decrease in size towards margins. One
spine postero-ventrally, most strongly developed in right valves. Anterior marginal pore canals 8 - 9
simple, short and straight; posterior canals not observed.

Remarks: Distinguished from G. volgaensis (Lyubimova) ( Stereo-Atlas of Ostracod Shells, 1979, 6 (9)) by being
generally more inflated and lacking anterior spines. G. miranda (Lyubimova) ( Stereo-Atlas of Ostracod
Shells, 1979, 6 (8)) also resembles G. elegans but is more acuminate posteriorly and possesses anterior
marginal spines.

Distribution: Middle Volga area; present material from lower part pseudo scythicus Zone, Lower Volgian at Gorodische.

Original record from ‘Neocomian’ of the Emba Oil Field, also Lake Inder (panderi Zone, Lower Volgian
of Sharapova, 1937).

Explanation of Plate 6, 34

Fig. 1 , RV, int. lat. (OS 1 1394, 750 pm long); fig. 2, juv. RV, ext. lat. (OS 1 1395, 719 pm long); fig. 3, RV, int. lat. muse. sc.
(OS 11394); fig. 4, LV, int. lat. hinge (OS 11392); fig. 5, RV, int. lat. hinge (OS 11394).

Scale A (200 pm, x 66), fig. 1 ; scale B (200 fim; x 70), fig. 2; scale C (50 pm, x 250), fig. 3; scale D (100 pm~, x 110), fig. 4;
scale E ( 1 00 pm ; x 120), fig. 5 .

Galliaecytheridea elegans (4 of 4)

Stereo-Atlas of Ostracod Shells 6, 32

Stereo-Atlas of Ostracod Shells 6, 34

Galliaecytheridea elegans (2 of 4)

I

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i

I

i

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i

Stereo-Atlas of Ostracod Shells 6 (7) 35—42 (1979) Galliaecytheridea gorodischensis ( 1 of 8)

595.337.14 0 16.233) (47:161 .048.54) : 551.351 + 552.52

ON GALLIAECYTHERIDEA GORODISCHENSIS FULLER & LORD sp. nov.

by Nicholas Fuller & Alan Lord
(University College, London)

Galliaecytheridea gorodischensis sp. nov.

1939 Eucy there grossopunctata (Chapman); E. G. Sharapova, Trudy NGRI, A 126, 17, pi. 1 , fig. 12.

1955 Palaeocytheridea grossopunctata (Chapman); P. S. Lyubimova, Trudy VNIGRI, new series, 84, 47, pi. II, figs. 5a- c.
non 1904 Cy there corrosa Jones & Sherborn var . grossepunctata Chapman, Proc. R. Soc. Victoria 16, 185, pi. 23, figs, 5 - 5b.

Holotype: Brit. Mus. (Nat. Hist.) OS 11404 d RV.

[Paratypes: Brit. Mus. (Nat. Hist.) OS 11402, OS 1 1403, OS 1 1405 - OS 1 1410.]

Type locality: Gorodische, near Ul'yanovsk, U.S.S.R.. Dorsoplanites panderi Zone, Middle Volgian, Upper Jurassic.

Explanation of Plate 6, 36

Fig. 1 , d LV, ext. lat. (paratype, OS 1 1402, 969 pm long); fig. 2, d LV, int. lat. (paratype, OS 1 1403, 969 pm long); fig. 3, d
RV, ext lat. (holotype, OS 1 1404, 969, pm long).

Scale A (500 ^m; x 50) figs. 1-3.

Stereo-Atlas of Ostracod Shells 6, 37

Galliaecytheridea gorodischensis (3 of 8)

in

Figured specimens: Brit. Mus. (Nat. Hist.) OS 11402 (d LV: PI. 6, 36, fig. 1), OS 11403 (d LV: PI. 6, 36, fig. 2; PI. 6,40, figs.

2, 5), OS 1 1404 (holotype, d RV: PI. 6, 36, fig. 3), OS 1 1405 (d RV: PI. 6, 38, fig. 1 ; PI. 6, 40, figs. 3, 4),
OS 11406 (9 RV: PI. 6, 38, fig. 2), OS 11407 (9 RV: PI. 6, 38, fig. 3; PI. 6, 42, figs. 2, 4), OS 11408
(9 LV: PI. 6, 40, fig. 1), OS 11409 (juv. RV: PI. 6, 42, fig. 1), OS 11410 (9 LV: PI. 6, 42, fig. 3).
OS 11402 - OS 11405 are from Bed 9 ( Dorsoplanites panderi Zone, Middle Volgian); OS 11406,
OS 1 1409, OS 11410 are from Bed 8 ( Subplanites pseudoscythicus Zone, Lower Volgian) and OS 1 1407
and OS 1 1408 are from Bed 5 ( Subplanites klimovi Zone, Lower Volgian) at Gorodische, 25 km north of
Ul’yanovsk, River Volga, U.S.S.R.. Bed numbers of Mesezhnikov, M. S., Dain, L. G., Kuznetsova, K. I. and
Yakovleva, S. P., International Colloquium on Upper Jurassic stratigraphy and the Jurassic /Cretaceous
boundary in the Boreal Realm - Jurassic /Cretaceous boundary beds in the Middle Volga area (A
Prospectus to Geological Excursions), All-Union Petroleum Research Geological Prospecting Institute,
(VNIGRI), Leningrad, 1977, fig. 1 .

Diagnosis: Rounded subrectangular, with inflated valves and prominent anterior marginal rims. Coarsely punctate
surface ornament. Postero-ventral spine may be present, especially in right valves. Anterior pore canals
5 - 6, simple and straight; posterior canals not observed. Sexual dimorphism strongly developed.

Explanation of Plate 6, 38

Fig. 1 , d RV, int. lat. (paratype, OS 11405, 969 p m long); fig. 2, 9 RV, ext. lat. (paratype, OS 1 1406, 1125 pm long); fig. 3, 9
RV, int. lat. (paratype, OS 1 1407, 981 pm long).

Scale A (500 pm\ x 50), fig. 1 ; scale B (500 pm; x 44), fig. 2; scale C (500 pm; x 52), fig. 3.

Stereo-Atlas of Ostracod Shells 6, 38

Galliaecytheridea gorodischensis (4 of 8)

Galliaecytheridea gorodischensis (2 of 8)

Stereo-Atlas of Ostracod Shells 6, 36

Stereo-Atlas of Ostracod Shells 6, 39 Galliaecytheridea gorodischensis (5 of 8)

Remarks: Sharapova (1939) identified her material with Cythere corrosa var. grossepunctata described by
Chapman (1904) from the Bajocian of Western Australia. Subsequently, Lyubimova (1955) followed
this specific identification for specimens from Gorodische on the River Volga, placing them in
Palaeocytheridea Mandelstam. The present material differs from the drawings given by Lyubimova only in
its possession of a finer, more widespread surface punctation. The Russian material is certainly not
conspecific with Chapman’s Australian form, and thus the name Galliaecytheridea gorodischensis is
proposed. Permyakova (in D. M. Pjatkova and M. N. Permyakova, Jurassic Foraminifera and Ostracoda of
the Ukraine, Kiev, 1978, p. 153. In Russian) has placed this species in Procytheridea Peterson [as
P. grossopunctata (Sharapova 1939)] , but inspection of the holotype of the type-species of Procytheridea
(P. F. Sherrington and A. Lord, Stereo-Atlas of Ostracod Shells 2: 39, p. 48, fig. 1, 1975) demonstrates
that the two are not congeneric.

Explanation of Plate 6, 40

Fig. 1 , 9 LV, ext. lat. (paratype, OS 1 1408, 937 pm long); fig. 2, 6 LV, int. lat. hinge (paratype, OS 11403, fig. 3); 6 RV, int.
lat. hinge (paratype, OS 11405); fig. 4, 6 RV, int. lat. muscle-scars (paratype, OS 11405); fig. 5, 6 LV, int. lat. muscle-scars
(paratype, OS 1 1403).

Scale A (500 ^m; x 53), fig. 1 ; scale B (100 pm; x 108), figs. 2, 3 ; scale C (50 pm; x 280), fig. 4; scale D (50 pm ; x 240), fig. 5.

— i-4-

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Stereo-Atlas of Ostracod Shells 6,41

trr

Galliaecytheridea gorodischensis (7 of 8)

Remarks: Cythere corrosa var. grossepunctata and C. drupacea var. fortior are both forms described by Chapman
(contd.) which B. Kellett and E. D. Gill (Aust. J. Sci. 18, p. 126. 1956) have subsequently regarded as dimorphs of
the same species. They placed the species in Procytheridea, but the assignment is difficult to verify in the
absence of internal characters. Chapman’s illustrations depict an ostracod which differs in outline and
ornament from the present material.

G. gorodischensis is found in association with G. miranda (Lyubimova), G. ramosa (Lyubimova),
G. elegans (Sharapova), G. mandelstami (Lyubimova), Mandelstamia ventrocomuta (Sharapova),
Oligocythereis kostytschevkaensis (Lyubimova), Protocythere prolongata (Sharapova) and Cytherelloidea
aff. C. weberi Steghaus.

Distribution: Lower and Middle Volgian at Gorodische. A similar form occurs in the Middle Volgian of Kashpir
(immediately south of Syzran on the River Volga and 200 km south of Gorodische) but has more anterior
marginal pore canals. Known from the Volga region and the Ukraine.

Explanation of Plate 6, 42

Fig. 1 , juv. RV, ext. lat. (paratype, OS 1 1409, 531 pm long); fig. 2, 9 RV, int. lat. hinge (paratype, OS 1 1407); fig. 3, 9 LV, int.
lat. muscle-scars (paratype, OS 1 1410); fig. 4, 9 RV, int. lat. muscle-scars (paratype, OS 1 1407).

Scale A (100 pm; x 1 20), fig. 1 ; scale B (100 pm; x 177), fig. 2; scale C (50 pm ; x 300), fig. 3 ; scale D (50 pm ; x 350), fig. 4.

Stereo-Atlas of Ostracod Shells 6, 42

Galliaecytheridea gorodischensis (8 of 8)

Stereo- Atlas of Ostracod Shells 6, 40

Galliaecytheridea gorodischensis (6 of 8)

I

I I I
4-4- -4-

Stereo-Atlas of Ostracod Shells 6 (8) 43—46 (1979)
595.337.14 (1 16.233) (47:161.048.54) : 55 1 .35 1 + 552.52

Galliaecytheridea miranda (1 of 4)

ON GALLIAECYTHERIDEA MIRANDA (LYUBIMOVA)

by Nicholas Fuller & Alan Lord
(University College , London)

Galliaecytheridea miranda (Lyubimova, 1955)

195 5 Palaeocytheridea miranda sp. nov. P. S. Lyubimova, Trudy VNIGRI, new series, 84, 46, pi. IV, figs. 6a - b.

Holotype: No. 226 - 30, VNIGRI (All-Union Petroleum Research Geological Prospecting Institute) collection,
Leningrad.

Type locality : Gorodische, Ul’yanovskaya region, U.S.S.R.. ‘Perisphinctes bleicheri Zone’, lower Volgian ( sensu
Lyubimova) Upper Jurassic.

Figured specimens: Brit. Mus. (Nat. Hist.) OS 11379 (d LV: PI. 6, 44, fig. 1), OS 11380 (d LV: PI. 6,44, fig. 2), OS 11381
(d RV: PI. 6, 44, fig. 3), OS 11382 (d RV: PI. 6,46, fig. l),OS 11383 (9 RV: PI. 6, 46, fig. 2), OS 11384
(juv. RV: PI. 6, 46, fig. 3), OS 11379 - OS 11382 are from Bed 8 ( Subplanites pseudoscythicus Zone,
Lower Volgian) and others from Bed 4 (Aulacostephanus autissiodorensis Zone, Upper Kimmeridgian) at
Gorodische, 25km north of Ul’yanovsk, River Volga, U.S.S.R.. Bed numbers of Mesezhnikov, M.S. et al.

(1977, fig, 1).

Explanation of Plate 6, 44

Fig. 1, 6 LV, ext. lat. (OS 11379, 812 pm long); fig. 2, d LV, int . lat. (OS 11380, 812 pm long); fig. 3, d RV, ext. lat. (OS

1 1381, 856 ,um long).

Scale A (200 pm\ x 6 1 ), figs. 1,2; scale B (200 pm\ x 58), fig. 3.

Stereo-Atlas of Ostracod Shells 6, 45

Galliaecytheridea miranda (3 of 4)

Diagnosis: Outline elongate-oval, with a well developed anterior marginal rim. Posterior triangular. Cardinal angles
marked. Right valves commonly show two posterior spines and one postero-ventral spine. Anterior pore
canals total 10 and are simple, short and straight; posterior canals not observed. Sexual dimorphism well
developed.

Remarks: Similar to G. gorodischensis Fuller and Lord in original illustrations of Lyubimova, but differs in fact in
outline and in density and development of ornament. Also shows some similarity to G. spinosa Kilenyi,
1969 from the Kimmeridgian type-section in England (Palaeontology 12, 112 - 160), which is relatively
longer with an acuminate posterior margin.

Distribution: This species is at present known only from Gorodische and Kashpir in the Volga Basin, with a range of
Upper Kimmeridgian to Middle Volgian.

Explanation of Plate 6, 46

Fig. 1 , 6 RV, int. lat. (OS 1 1382, 875 pm long); fig. 2, 9 RV, ext. lat. (OS 1 1383, 1000 pm long); fig. 3, juv. RV, ext. lat. (OS
11384, 750 long).

Scale A (200 pm \ x 56), fig. 1 ; scale B (200 pm \ x 5 1 ), fig. 2 ; scale C (200 pm ; x 66), fig. 3.

Stereo-Atlas of Ostracod Shells 6, 46

Galliaecytheridea miranda (4 of 4)

Galliaecy theridea miranda (2 of 4)

i-~ -

Stereo-Atlas of Ostracod Shells 6, 44

+-*■- r

Stereo-Atlas of Ostracod Shells 6 (9) 47—50 (1979) Galliaecytheridea volgaensis (1 of 4)

595.337.14 (1 16.233) (47:161.048.54) : 55 1 .35 1 + 552.52

ON GALLIAECYTHERIDEA VOLGAENSIS (LYUBIMOVA)

by Nicholas Fuller & Alan Lord
(University College, London)

Galliaecytheridea volgaensis (Lyubimova, 1955)

1955 Palaeocytheridea volgaensis sp. nov. P. S. Lyubimova, Trudy VNIGRI, new series, 84, 41, pi. Ill, figs. 4a - b.

Holotype: No. 117-4 VNIGRI (All-Union Petroleum Research Geological Prospecting Institute) collection,
Leningrad.

Type locality: Samarskaya Luka, Repevka, U.S.S.R.. Upper Kimmeridgian ( sensu Lyubimova, 1955), Upper Jurassic.

Figured specimens: Brit. Mus. (Nat. Hist.) OS 1 1385 (<J LV: PI. 6, 48, fig. 1), OS 1 1386 (d LV: PI. 6, 48, fig. 2), OS 11387 (6
RV: PI. 6, 48, fig. 3), OS 11388 (6 RV: PI. 6, 50, fig. 1 ), OS 1 1389 (9 LV: PI. 6, 50, fig. 2), OS 11390 (9
RV: PI. 6, 50, fig. 3), All specimens are from Bed 3 ( Aulacostephanus autissiodorensis Zone, Upper
Kimmeridgian) at Gorodische, 25km north of Ul’yanovsk, River Volga, U.S.S.R.. Bed number of
Mesezhnikov, M.S. et al. (1977, fig. 1).

Explanation of Plate 6, 48

Fig. 1, 6 LV, ext. lat. (OS 1 1385, 687 pm long); fig. 2, 6 LV, int. lat. (OS 1 1386, 750 pm long); fig. 3, 6 RV, ext. lat. (OS
11387, 750, pm long).

Scale A (200 pm\ x 7 1 ), fig. 1 ; scale B ( 200 pm\ x 67), figs. 2, 3.

— I — I- J~f~+

! 1 iii

>1 III

I Stereo-Atlas of Ostracod Shells 6, 49 Galliaecytheridea volgaensis ( 3 of 4) j

11 III

ii 'll

11 Iii

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Si iii

ll III

Diagnosis: Elongate subrectangular, parallel-sided in dorsal view with well developed anterior marginal rims. Strong | | 1

surface ornament of large subrounded cells which decrease in size near the margins. Postero-ventral spines
I ; occur, most strongly developed on right valves. Normal pores prominent on surface. Marginal pore canals

simple, straight with 8-10 anteriorly and 3 posteriorly. Sexual dimorphism strongly developed. ! | !

Remarks: Occurs in Upper Kimmeridgian associated with G. monstrata (Lyubimova), G. miranda (Lyubimova),
G. mandelstami (Lyubimova), Mandelstamia ventrocornuta (Sharapova), Oligocythereis
kostytschevkaensis (Lyubimova) and Protocythere prolongata (Sharapova). Permyakova (in Pjatkova,
D. M. & Permyakova, M. N., Jurassic Foraminifera and Ostracoda of the Ukraine, Kiev, 1978, p. 136. In
Russian.) has assigned this species to Parariscus Oertli.

Distribution: This species is at present known only from Gorodische (Upper Kimmeridgian) in the Volga Basin and
from the Ukraine. Lyubimova (1955) gives a range of Lower Oxfordian to Lower Volgian for this species.

Explanation of Plate 6, 50

Fig. 1 , 6 RV, int. lat. (OS 1 1388, 750 pm long); fig. 2, 9 LV, ext. lat. (OS 11389, 625 pm long); fig. 3, 9 RV, ext. lat. (OS
1 1390, 637 pm long).

Scale A (200 pm\ x 70), fig. 1 ; scale B (200 pm\ x 80), fig. 2; scale C (200 ,um; x 78), fig. 3.

Stereo-Alias of Ostracod Shells 6, 50

Galliaecytheridea volgaensis (4 of 4)

Stereo-Atlas of Ostracod Shells 6,48

Galliaecytheridea volgaensis (2 of 4)

i

Stereo-Atlas of Ostracod Shells 6 (10) 51 —54 (1979)

595.337.14 (1 16.233) (47:161:048.54 + 161.048.53) : 55 1 .35 1 + 55 2.52

Mandelstamia ventrocornuta (1 of 4)

ON MANDELSTAMIA VENTROCORNUTA (SHARAPOVA)

by Nicholas Fuller & Alan Lord
( University College, London )

Mandelstamia ventrocornuta (Sharapova, 1939)

1939 Cytherissa ventrocornuta sp. nov. E. G. Sharapova, Trudy NGRI, A 126, 12, pi. I, fig. 4.

1955 Mandelstamia ventrocornuta (Sharapova, 1939); P. S. Lyubimova, Trudy VNIGRI, new series, 84, 63, pi. VI, figs. 9a - c.

Holotype: No. 51 - 4, VNIGRI (All-Union Petroleum Research Geological Prospecting Institute) collection,
Leningrad.

Type locality: Two sites given in original description; Lyubimova {op. cit., p. 63) gives Obshchiy Syrt, Ozinkovskii
district, U.S.S.R.. Lower Volgian (sensu Lyubimova), Upper Jurassic.

Figured specimens: Brit. Mus. (Nat. Hist.) OS 11396 (LV: PI. 6, 52, figs. 1, 2), OS 11397 (RV: PI. 6, 52, fig. 3), OS 11398
(RV: PI. 6, 54, fig. 1 ), OS 1 1399 (LV: PI. 6, 54, fig. 2), OS 1 1400 (car.: PI. 6, 54, figs. 3, 4), OS 1 1401
(juv. LV: PI. 6, 54, fig. 5). OS 11397, OS 11399 from Bed 3 {Aulacostephanus autissiodorensis Zone,
Upper Kimmeridgian). OS 11396, OS 11398 and OS 11401 from Bed 11 {Dorsoplanites panderi Zone,
Middle Volgian) at Gorodische, 25km north of Ul’yanovsk, River Volga; OS 11400 from Bed 7 {panderi
Zone, Middle Volgian) at Kashpir, immediately south of Syzran, on the River Volga and 200km south of
Gorodische, U.S.S.R.. Bed numbers of Mesezhnikov, M. S. et al. (1977, figs. 1 and 2).

Explanation of Plate 6, 5 2

Fig. 1, LV, ext. lat. (OS 1 1396, 687 pm long); fig. 2, LV, int. lat. (OS 1 1396, 687 pm long); fig. 3, RV, ext. lat. (OS 1 1397, 656
pm long).

Scale A (200 ^m; x 7 1 ), figs. 1,2; scale B (200 pm \ x 75), fig. 3.

Stereo-Atlas of Ostracod Shells 6, 53

Mandelstamia ventrocornuta (3 of 4)

Diagnosis: A species of Mandelstamia with characteristic features of genus, but inner margin and line of
concrescence do not coincide anteriorly and a narrow vestibule is present. Surface ornamented with an
open reticulate network; postero-ventral protruberance present. Marginal pore canals simple and straight,
10 anteriorly and 7 posteriorly. Sexual dimorphism not recognised.

Remarks: Mandelstamia abdita Lyubimova, 1955 has a similar ornamental pattern, but differs in shape and in the
possession of a strong mid- to postero-ventral spine. M. facilis Lyubimova, 1955 lacks any postero-
ventral features, although it does have a reticulate ornament. In our material a single carapace of M. facilis
occurred and this closely resembled Lyubimova’s illustrations {op. cit., pi. VII, figs. 2a, b), but both
specimen and illustrations could well be female although no obvious male counterpart was recognised.
Inner margin and line of concrescence usually coincide in Mandelstamia, but in M. ventrocornuta and in
M. sexti Neale, 1961 from the Speeton Clay (Lower Cretaceous) of England a narrow anterior vestibule is
present.

Distribution: The type material was from the Virgatites virgatus and D. panderi Zones (Middle Volgian) and Lyubimova
(1955) records the species from Oxfordian to mid-Volgian. At Gorodische the species ranges from
Kimmeridgian {Aulacostephanus eudoxus Zone) to Middle Volgian {panderi Zone). Known from the
Volga area and the Ukraine.

Explanation of Plate 6, 54

Fig. 1 , RV, int. lat. (OS 11398, 750 pm long); fig. 2, LV, int. lat. muse. sc. (OS 11399); fig. 3, car., vent. (OS 1 1400, 1\9 pm
long); fig. 4, car., dors. (OS 1 1400, 7 1 9 pm long); fig. 5, juv. LV, ext. lat. (OS 1 1401, 4 1 9 pm long).

Scale A (200 pm; x 67), fig. 1 ; scale B (25 //m; x 500), fig. 2; scale C (200 /jm;x 71), figs. 3,4; scale D ( 100 pm ; x 120), fig. 5.

Stereo-Atlas of Ostracod Shells 6(1 1) 55—62 (1979) Oligocythereis kostytschevkaensis (1 of 8)

595.337.14 (1 16.233) (47:161.048.54) : 551.351 + 5 52.52

ON OLIGOCYTHEREIS KOSTYTSCHEVKAENSIS (LYUBIMOVA)

by Nicholas Fuller & Alan Lord
(University College, London)

Oligocythereis kostytschevkaensis (Lyubimova, 1955)

1955 Orthonotacythere kostytschevkaensis sp. nov. P. S. Lyubimova, Trudy VNIGRI, new series, 84, 91 - 92, pi. X, figs. 6a - b.

Holotype: No. 117 - 10, VNIGRI (All-Union Petroleum Research Geological Prospecting Institute) collection,
Leningrad.

Type locality: Samarskaya Luka, Kostychi, U.S.S.R.. Upper Kimmeridgian (sensu Lyubimova, 1955), Upper Jurassic.

Explanation of Plate 6, 56

Fig. 1, 6 LV, ext. lat. (OS 11411, 750 pm long); fig. 2, <5 LV, int. lat. (OS 11412, 687 pm long); fig. 3, 6 RV, ext. lat. (OS
11413, 750 pm long).

Scale A ( 100 ^m; x 67), fig. 1 ; scale B ( 100 ,ttm; x 75), fig. 2; scale C ( 1 00 pm ; x 65 ), fig. 3.

-t-i-

Stereo- Atlas of Ostracod Shells 6, 57

Oligocythereis kostytschevkaensis (3 of 8)

X-L.

I I

» I

Figured specimens: Brit. Mus. (Nat. Hist.) OS 11411 (6 LV: PI. 6, 56, fig. 1), OS 11412 (<5 LV: PI. 6, 56, fig. 2; PI. 6, 62, fig.

2) OS 11413 (<J RV: PI. 6, 56, fig. 3), OS 11414(<3RV: PI. 6, 58, fig. 1), OS 11415 (9 LV: PI. 6, 58, fig.
2), OS 1 1416 (9 LV: PI. 6, 58, fig. 3), OS 1 1417 (9 RV: PI. 6, 60, figs. 1 , 2), OS 1 1418 (6 RV: PI. 6. 60.
fig. 3; PI. 6, 62, fig. 3), OS 11419 (9 RV: PI. 6, fig. 4; PI. 6, 62, fig. 1), OS 11420 (juv. RV: PI. 6, 60,
fig. 5). OS 11411, OS 11413, OS 11415, OS 11416, OS 11417 and OS 11419 are from Bed 3
(Aulacostephanus autissiodorensis Zone, Upper Kimmeridgian), OS 11412, OS 11418 and OS 11420
are from Bed 4 (autissiodorensis Zone) and OS 11414 is from Bed 8 ( Subplanites pseudoscythicus Zone,
Lower Volgian) at Gorodische, 25km north of Ul’yanovsk, River Volga, U.S.S.R.. Bed numbers of
Mesezhnikov, M. S. et al. (1977. fig. 1).

Diagnosis: Subrectangular, tapering, greatest height anteriorly; prominent cardinal angles. Large eye tubercle.

Posterior marginal rim bears 4 - 6 spine bases. Surface relief strong and accompanied by an ornament of
oval to subtriangular pits. Anterior pore canals 10 - 12 in number, simple, slightly sinuous, grouped in
pairs; posterior canals 4 - 5 in number simple, straight. Sexually dimorphic.

Explanation of Plate 6, 58

Fig. 1 , d RV, int. lat. (OS 1 1414, 700 pm long); fig. 2, 9 LV, ext. lat. (OS 11415, 656 pm long); fig. 3, 9 LV, int. lat. (OS
1 1416, 656 pm long).

Scale A (100 ^m; x 71), fig. 1 ; scale B ( 100 pm; x 75), figs. 2, 3.

TT

Stereo-Atlas of Ostracod Shells 6, 58

Oligocythereis kostytschevkaensis (4 of 8)

Stereo-Atlas of Ostracod Shells 6,56

Oligocythereis kostytschevkaensis (2 of 8)

4-4-4

Stereo-Atlas of Ostracod Shells 6, 59 Oligocy thereis kostytschevkaensis (5 of 8)

Remarks: A distinctive species which we consider to belong to Oligocy thereis Sylvester-Bradley. However,
Permyakova (in D. M. Pjatkova and M. N. Permyakova, Jurassic Foraminifera and Ostracoda of the
Ukraine, Kiev, 1978, p. 148. In Russian) has recently placed this species in Infacythere Griindel. In PI. 6,
60, fig. 5 a juvenile specimen (OS 11420) is illustrated which is similar to O. kostytschevkaensis but
intermediate instar stages were not observed.

The preservation of this and other species from the Volgian of the type-area ( Stereo- Atlas of
Ostracod Shells 1979, 6 (6) — (10) is excellent, as are foraminifera and calcareous nannofossils from the
same samples. The structural stability of the Russian platform has helped to minimise diagenetic effects,
resulting in an exceptional state of preservation (W. J. Arkell, Jurassic Geology of the World, Edinburgh,
1956, pp. 491 -92).

Distribution: Upper Kimmeridgian, Lower and Middle Volgian of Gorodische; Volga area and the Ukraine.

Explanation of Plate 6, 60

Fig. 1, 9 RV, ext. lat. (OS 1 1417, 625 /urn long); fig. 2, 9 RV, ext. antero-dorsal area (OS 1 1417); fig. 3, 6 RV, int. lat. muscle-
scars (OS 11418); fig. 4, 9 RV, int. lat. muscle-scars (OS 11419); fig. 5, juv. RV, ext. lat. (OS 1 1420, 375 /um long).

Scale A (100 /4 m; x 80), fig. 1 ; scale B (50 /4 m; x 200), fig. 2; scale C (50 /4m; x 383), fig. 3 ; scale D (50 /jm ; x 396), fig. 4; scale
E (100 /4m; x 130), fig. 5.

-1-4.-

Stereo-Atlas of Ostracod Shells 6, 61

Oligocy thereis kostytschevkaensis (7 of 8)

Explanation of Plate 6, 62

Fig. 1 , 9 RV, int. lat. (OS 1 1419, 625 /4 m long); fig. 2, 6 LV, int. lat. hinge (OS 1 1412); fig. 3, 6 RV, int. lat. hinge (OS 1 1418).
Scale A ( 100 /4 m; x 1 50), fig. 1 ; scale B (100 /4 m; x 130), fig. 2; scale C ( 100 /4m; x 122), fig. 3.

Stereo-Atlas of Ostracod Shells 6, 62

Oligocythereis kostytschevkaensis (6 of 8)

Oligocythereis kostytschevkaensis (8 of 8)

Stereo- Atlas of Ostracod Shells 6, 60

I I I

I I
I I
I I

1

I

Stereo-Atlas of Ostracod Shells 6 (12) 63—66 (1979)
595.336.13 (1 13.313) (486:161.018.57) : 551.35 + 552.55

Caprabolbina capra (1 of 4)

ON CAPRABOLBINA CAPRA SCHALLREUTER

by Roger E. L. Schallreuter
(University of Hamburg, German Federal Republic)

Genus CAPRABOLBINA Schallreuter, 1972
Type-species (by original designation): Caprabolbina capra Schallreuter, 1972

Diagnosis: A genus of the subfamily Gryphiswaldensiinae. Unisulcate, S2 deep, long and sigmoidal; preadductorial
node low, more or less elliptical, sited behind a weak (-obsolete) SI; greatest lobal inflation occurs in
postadductorial area posteroventrally of S2, crest of posterior lobe projects above the hinge line and
higher than that of the other lobes. Velum entire, narrow and flange-like anteriorly and ventrally,
posteriorly appears as a rounded brim; female velar flange expanded anterocentrally to centroventrally,
forming a faintly convex dolon paralleled by a narrow, upturned, rim-like peripheral torus; dolon and
the marginal surface form a distinct antrum. Marginal sculpture consists of a ridge. Except for S2, the
antrum and parts of dorsum, shell surface is reticulate; some tubercles occur, especially on posterior part
and ventral surface of velum.

Remarks: The deep, long, sigmoidal main sulcus (S2) differentiates this genus from Gryphiswaldensia Schallreuter
( Ber . geol. Ges. DDR 10 (4), 481, 1965) and Dogoriella Kanygin ( Ostrakody ordovika gomoj sistemy
Cerskogo, 41, 1967) As shown in Ctenobolbina maclearni Copeland (Pap. geol. Surv. Can. 72 - 43, 10,
1973), the two ventral spines of the type-species are not, as formerly presumed (Schallreuter, Mss. Z.
Univ. Greifswald (Math, -naturwiss. R.) 21, 206, 1972), a diagnostic feature of the genus.

Distribution: Upper Ordovician. Baltoscandia and Quebec, Canada.

Explanation of Plate 6, 64

Figs. 1 - 4, posteriorly incomplete 9 RV (GPIH 2184, 707 pm long): fig. 1, ext. anterovent. obi.; fig. 2, ext. ant.; fig. 3, ext.

vent.; fig. 4, ext. lat.

Scale A (250 pm\ x 98), fig. 1 ; scale B (250 pm\ x 85), fig. 2; scale C (250 pm\ x 93, figs. 3, 4.

Stereo-Atlas of Ostracod Shells 6,65

Caprabolbina capra (3 of 4)

Caprabolbina capra Schallreuter, 1972

1972 Caprabolbina capra sp. nov. R. Schallreuter, Mss. Z. Univ. Greifswald (Math. - naturwiss. R.) 21, 206, fig. 3.

1975 Caprabolbina capra Schallreuter; R. Schallreuter, Neues Jb. Geol. Palaont. Abh. 150 (3), 289.

Holotype: Geologisch-Palaontologisches Institut, University of Hamburg (GPIH), no. 2183, tecnomorphic RV
(larva).

Type locality: Norderstrand Visby, Isle of Gotland (Baltic Sea); lat. 57°40'N, long. 18°18.5'E. Ojlemyrflint erratic
boulder (no. G2), Upper Ordovician.

Figured specimens: Geologisch-Palaontologisches Institut, University of Hamburg, nos. 2184 (posteriorly incomplete 9 RV:
PI. 6, 64, figs. 1 - 4) and 2185 (d LV: PI. 6, 66, figs. 1 - 4). Both from the Isle of Gotland (Baltic Sea),
Ojlemyrflint erratic boulders nos. G6 (2184; Lickershamn; lat. 57°49.5' N, long. 18°30.5'E) and G9
(2185; Gnisvard: lat. 57°30'N, long. 18/E), Upper Ordovician; coll, by Horst Kaufmann, 1975.

Diagnosis: Species of Caprabolbina whose adults are c. 0.85mm long. S2 rather broad. Ventral lateral surface has a
single spine on either side of S2. Reticulation relatively coarse.

Remarks: Caprabolbina capra is characterized by its two ventral spines. In Caprabolbina maclearni S2 is smaller and
the reticulation finer than in C. capra.

Distribution: Ojlemyrflint erratic boulders of the Isle of Gotland (Baltic Sea), Upper Ordovician.

Explanation of Plate 6, 66

Figs. 1-4 ,6 LV (GPIH 2185, 854 long): fig. 1 , ext. lat.; fig. 2, ext. ant. obi. ; fig. 3, ext. vent.; fig. 4, ext. dors. obi.
Scale A (250 pm\ x 97), fig. 1 ; scale B(250(um;x65), fig. 2; scale C(250,um;x82), fig. 3 ; scale D (250 /rra; x 84), fig. 4.

TT

Stereo-Atlas of Ostracod Shells 6, 64

Caprabolbina capra (2 of 4)

Stereo-Atlas of Ostracod Shells 6, 66

Caprabolbina capra (4 of 4)

wm

•« e • t % A5

.-■* W - ■

Stereo-Atlas of Ostracod Shells 6 (13) 67—70 (1979)
595.336.13 (1 13. 313) (486: 161. 01 8. 57) : 551.35 + 552.55

Platybolbina spongiosoreticulata (1 of 4)

ON PLATYBOLBINA ( RET1CU LO BOLBIN A )
SPONGIOSORETICULATA SCHALLREUTER

by Roger E. L. Schallreuter
(University of Hamburg, German Federal Republic)

Platybolbina (Reticulobolbina) spongiosoreticulata Schallreuter, 1972

1972 Platybolbina (Reticuloboblina) spongiosoreticulata sp. nov. R. Schallreuter, Wiss. Z. Univ. Greifswald (Math, -naturwiss.
R.) 21, 205, 206, fig. 1.

1972 Platybolbina (Reticulobolbina) spongiosoreticulates sp. nov. R. Schallreuter, lb id., 21, 205 ( lapsus calami).

1975 Platybolbina (Reticulobolbina) spongiosoreticulata Schallreuter; R. Schallreuter, Palaeontographica (A) 149, (4/6), 147.

Holotype: Geologisch-Palaontologisches Institut, University of Hamburg (GPIH), no. 2186, a tecnomorphic RV
(larva).

Type locality: Norderstrand Visby, Isle of Gotland (Baltic Sea); lat. 57°40’N, long. 18°18.5'E. Ojlemyrflint erratic
boulder (no. G2), Upper Ordovician.

Explanation of Plate 6, 68

Figs. 1-3,9 RV (GPIH 2187, 1,003 long): fig. 1 , ext. ant. obi.; fig. 2, ext. vent, obi.; fig. 3, ext. lat. Fig. 4, d RV with velum
broken away, ext. vent. (GPIH 2188, 982 long).

Scale A (250 pm\ x 75), figs. 1 - 4.

Stereo-Atlas of Ostracod Shells 6, 69

Platybolbina spongiosoreticulata (3 of 4)

Figured specimens: Geologisch-Palaontologisches Institut, University of Hamburg, nos. 2187 (9 RV: PI. 6, 68, figs. 1 - 3),
2188 (d RV with velum broken away: PI. 6. 68, fig. 4; PI. 6, 70, fig. 3), 2189 (anterodorsally incomplete
tecnomorphic RV: PI. 6, 70, fig. 1) and 2190 (tecnomorphic LV: PI. 6, 70, fig. 2).

All the figured specimens are from the Isle of Gotland (Baltic Sea), beach opposite the Isle of
Lilia Karlso; lat, 57°18'N, long. 18°8'E; Ojlemyrflint erratic boulder (no. G30, coll, by the author, 1976),
Upper Ordovician.

Diagnosis: Adults c. 1.00 - 1.06mm long. Lateral surface quite strongly convex. Adductorial muscle scar field is
central, smooth, not depressed. Velar flange entire, and in tecnomorphs is narrower. Dolon broad,
strongly convex, occupies the antero- and centroventral regions. Lateral surface of shell has dense,
‘sponge -like’ reticulation, which is absent from the muscle scar field and is reduced near the cardinal areas.

Remarks: This species was hitherto recorded from only one juvenile valve. The largest known tecnomorphic valve
with a velum (GPIH 2191) is 1.06mm long, its domicilium being 870 long. The domicilium of the
figured female right valve is 823 pm long, that of the figured 6 RV 900 pm long. It seems reasonable
to suggest, therefore, that the males are possibly larger than the females.

The specimens illustrated in PL 6, 70, figs. 1 - 3 show that the reticulation is finer outside than
inside the valves.

Distribution: Ojlemyrflint erratic boulders of the Isle of Gotland (Baltic Sea), Upper Ordovician.

Explanation of Plate 6, 70

Fig. 1, tecnomorphic RV (anterodorsaliy incomplete), ext. lat. (GPIH 2189, 902 pm long); fig. 2, tecnomorphic LV, int. lat.
(GPIH 2190, 744 pm long); fig. 3, 6 RV (velum broken away), ext. lat. (GPIH 2188).

Scale A (250 ^m; x 77), fig. 1 ; scale B (250 pm\ x 94), fig. 2; scale C (250 pm\ x 71 ), fig. 3.

Stereo-Atlas of Ostracod Shells 6, 68 Platybolbina spongiosoreticulata (2 of 4)

S<g;>U;i;S

Stereo-Atlas of Ostracod Shells 6, 70

Platybolbina spongiosoreticulata (4 of 4)

/r,V* * a

ms&wk

Stereo -Atlas of Ostracod Shells: Vol.6, Parti

CONTENTS

6 (1) 1 - 4 On Schuleridea hammi (Triebel); by J. W. Neale

6 (2) 5 - 12 On Cativella bensoni Neale; by J. W. Neale

6 (3) 13-20 On Pelecocythere sylvesterbradleyi Athersuch gen. et sp. nov.; by J. Athersuch

6 (4) 2 1 - 26 On Zabythocypris redunca Athersuch & Gooday sp. nov.; by J. Athersuch & A. Gooday

6 (5) 27 - 30 On Paijenborchellina alata Gurney sp. nov.; by A. Gurney

6 (6) 31 - 34 On Galliaecytheridea elegans (Sharapova); by N. Fuller & A. Lord

6 (7) 35 - 42 On Galliaecytheridea gorodischensis Fuller & Lord sp. nov.; by N. Fuller & A. Lord

6 (8) 43 - 46 On Galliaecytheridea miranda (Lyubimova); by N. Fuller & A. Lord

6 (9) 47 - 50 On Galliaecytheridea volgaensis (Lyubimova); by N. Fuller & A. Lord

6(10)51 -54 On Mandelstamia ventrocornuta (Sharapova); by N. Fuller& A. Lord

6 (1 1) 55 - 62 On Oligocythereis kostytschevkaensis (Lyubimova); by N. Fuller & A. Lord

6 (12) 63 - 66 On Caprabolbina capra Schallreuter; by R. E. L. Schallreuter

6 (13) 67 - 70 On Platybolbina ( Retie ulobolbina ) spongiosoreticulata Schallreuter; by R. E. L. Schallreuter

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