l Stereo-Atlas of Ostracod Shells

WfjBb ^ •

in the University of Leicester, England

INSTRUCTIONS TO AUTHORS

Contributions illustrated by scanning electron micrographs of Ostracoda in stereo-pairs

are invited. Full instructions may be obtained on request from the Editors. Format should

follow the style set by the majority of papers in this issue. The Editors should be

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illustrations should be cut to a minimum; preferably each plate should be accompanied by

one page of text only.

Department of Geology, The University, Leicester.

PUBLICATION DATE

Corrected issue date for Volume 2, Part 2 is 17th July, 1974.

STEREO-VIEWING FOR USERS OF THE ATLAS

In order to gain maximum information and benefit from the use of the Steveo-Atlas it is

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Leicester was supplied by the Natural Environment Research Council under the terms of

Grant No. GR/3/95 for the purpose of micropalaeontological research. Editorial expenses

are supported by N. E. R. C. Grant No. GR3/2198.

Plates printed by Broadwater Press Limited, Welwyn Garden City, Herts., England.

Stereo-Atlas of Ostracod Shells, 2:13:69-76 (1974) Semicytherura nigrescens (1 of 8)

595.337.14 (119.9) (261.268:162.003.50 + 423.3:162.003.50 + 261.26:162.002.55): 551.351

ON SEMICYTHERURA NIGRESCENS (BAIRD)

by John E. tfait taker

( British Museum (Natural History) London )

Genus SEMICYTHERURA Wagner, 1957

Type-speoies (by original designation) : Cythere nigrescens Baird, 1838

Diagnosis: Shell smooth to highly ornate; caudal process pronounced. Internally,

calcified inner lamella very broad both anteriorly and posteriorly; in

posterior part the line of concrescence (= inner margin) sweeps strongly

forwards, in many species to reach as far as the middle of the valve;

consequently marginal pore canals very long though many are false

particularly in the posterior region. Median hinge element of left valve

usually smooth and short, but produced at both ends and generally

crenulate. Males wider than females, being inflated posteriorly to

accommodate the massive copulatory appendage.

Remarks: For a comparison with Cytherura and Hemicytherura as typified by their

respective type-species, C. gibba (0. F. Muller) and H. cellulosa

(Norman), see Stereo-Atlas of Ostracod Shells , vol . 1, pt. 4, pp. 273-

280 and vol. 1, pt. 1, pp. 77-84, 1973.

Explanation of Plate 2:13:70

Fig. 1, 9 car., ext. It. lat. (1974.105, 400 ym long); fig. 2, d car., ext. It. lat.

(1974.106, 420 ym long); fig. 3, juv-1 car., ext. It. lat. (1974.107, 350 ym long).

Scale A (100 ym ,* xiso) , figs. 1-3.

Stereo-Atlas of Ostracod Shells, 2:13:71 Semicytherura nigrescens (3 of 8)

Semioytherura nigrescens (Baird, 1838)

1838 Cythere nigrescens sp. nov. W. Baird, Mag. Zool . Bot . , vol. 2, p. 143, pi. V, fig. 27.

1866 Cytherura nigrescens (Baird); G. 0. Sars, Forh. VidenskSelsk . Krist., vol. for 1865,

p. 71.

1957 Semicytherura nigrescens (Baird); C. W. Wagner, Sur les Ostracodes du Quaternaire

recent des Pays-Bas et leur utilisation dans 1' etude geologique des depots holocbnes ,

Mouton & Co., The Hague, p. 81, pi. XXXVII.

Type specimens: The types from Berwick Bay, Northumberland, NE England are not with the

remaining part of the Baird Collection in the Brit. Mus. (Nat. Hist.)

and must be presumed lost.

Diagnosis: Adult carapace small (c. 0.40-0.45 mm long); venter straight, dorsal

margin gently arched. Ornament very subdued, made up for the most part

of fine ridges and puncta arranged in rows; towards the outer surfaces,

however, it becomes slightly stronger with a reticulum developed.

Internally, posterior indentation of line of concrescence only moderate.

Males more elongate and widest posteriorly.

Explanation of Tlate 2:13:72

Fig. 1, 9 car., ext. dors. (1974.108, 400 ym long); fig. 2, d car.,

420 ym long); fig. 3, d car., ext. vent. (1974.110, 400 mm long).

Scale A (100 ym ; xi5Q) , figs. 1-3.

ext. dors. (1974.109,

Semicytherura nigrescens (4 of 8)

Stereo-Atlas of Ostracod Shells, 2:13:72

"j~f-

I! Stereo-Atlas of Ostracod Shells, 2:13:70

Semicytherura nigrescens (2 of 8)

Stereo-Atlas of Ostracod Shells, 2:13:73 Semicytherura nigrescens (5 of 8)

Figured specimens: Brit. Mus. (Nat. Hist.) nos. 1974.105 (9 car.: Pi. 2:13:70, fig. 1;

PI. 2:13:76, fig. 3), 1974.106 (d car.: Pi. 2:13:70, fig. 2; PI. 2:13:76,

fig. 2), 1974.107 (juv-1 car.: PI. 2:13:70, fig. 3), 1974.108 (9 car.:

PI. 2:13:72, fig. 1), 1974.109 (d car.: Pi. 2:13:72, fig. 2), 1974.110

(d car.: Pi. 2:13:72, fig. 3), 1974.111 (9 LV: Pi. 2:13:74, figs. 1, 2,

4; PI. 2:13:76, fig. 1). Hancock Mus., Newcastle-upon-Tyne, no number,

but placed in a separate, marked slide (d RV: Pi. 2:13:74, figs. 3, 5).

Nos. 1974.105-110 (living at the time of collection), from tufts of

the green-alga Cladophora in the littoral zone at Osmington Mills,

Weymouth Bay, S England (approx, long. 2°23'W, lat. 50°38'N); salinity

34 %o , water temperature 19 °C; coll, by the author, Sept. 1969.

No. 1974.111 (dead) from The Fleet, Dorset, S England (approx, long.

2 0 34 ' W, lat. 50°38'N). Hancock Mus. specimen (dead) from a slide in the

Brady Collection from Budle Bay, Northumberland, NE England, close to

the type locality (approx, long. 1°45'W, lat. 55°37'N).

Explanation of Plate 2:13:74

Fig. 1, 9 LV, int. lat. (1974.111, 460 ym long). Figs. 2, 4, 9 LV, int. lat. (1974.111):

fig. 2, post, hinge; fig. 4, ant. hinge. Figs. 3, 5, d RV, int. lat. (Hancock Mus.

specimen, 440 ym long): fig. 3, ant. hinge; fig. 5, post, hinge.

Scale A (100 ym ; xl50) , fig. 1; scale B (25 ym ; *500) , figs. 3-5.

Stereo-Atlas of Ostracod Shells, 2:13:75 Semicytherura nigrescens (7 of 8)

Remarks: When seen alive, this rather beautiful species is further distinguished

by its broad black "saddle-shape" band of colour (hence the name) . The

instars (PI. 2:13:70, fig. 3) are quite unlike the adults (PI. 2:13:70,

figs. 1, 2) and it seems that Brady and Norman, working in the latter

half of the 19th C., thought them to be a separate species. I have seen

many such juveniles, labelled Cytherura acuta, in their collections in

the Brit. Mus. (Nat. Hist.) and the Hancock Mus., Newcastle-upon-Tyne,

but as far as I can ascertain this name was never published.

Cytherura nigrescens G. W. Muller (1894, Fauna Flora Golf. Neapel . ,

Monogr. 21, p. 290) is a totally different species to that of Baird.

Muller later realised that the name was pre-occupied, and renamed it

(1912, Das Tierreich, vol. 31, p. 264), by chance, Cytherura acuta !

Distribution : A phytal marine ostracod found living in the algal zone of the coasts

of NW Europe from the Bay of Biscay in the S (Yassini, 1969, Bull. Inst.

Geol. Bassin Aquitaine , vol. 7, p. 88) to the Arctic coast of Norway in

the N (Sars, 1866). Hagerman (1967, Commentat. biol . , vol. 30, p. 5)

states that it penetrates the Baltic Sea as far as the Gulf of Finland

where the salinity is as low as 6%o.

Stratigraphic range: Pleistocene-Recent.

Explanation of Plate 2:13:76

Fig. 1, 9 LV, int. muse. sc. (1974.111); fig. 2, 9 car., detail of post. dors, region

showing ornament & celate normal pore & seta (1974.105) [Note attached diatom, Cocconeis] ;

fig. 3, d car., detail of ant. vent, region showing several types of simple pores (1974.106).

Scale A (25 ym ; *570) , fig. 1; scale B (10 ym ; xi300) , fig. 2; scale C (10 ym ; xi000) ,

fig. 3.

Semicytherura nigrescens (6 of 8)

•7

I Stereo-Atlas of Ostracod Shells, 2:13:74

Stereo-Atlas of Ostracod Shells, 2:13:76

Semicytherura nigrescens (8 of 8)

Stereo-Atlas of Ostracod Shells, 2:14:77-84 (1974) Semicytherura cornuta (1 of 8)

595.337.14 (119.9) (423.3:162.003.50+261.268:162.003.50): 551.351

ON SEMICYTHERURA CORNUTA (BRADY)

by J. E. "Whittaker

(. British Museum (Natural History) 3 London )

Semicytherura cornuta (Brady, 1868)

1868 Cytherura cornuta sp. nov. G. S. Brady, Trans. Linn. Soc . Lond . , vol. 26, pt. 2,

p. 445, pi. XXXII, figs. 12-15 [9].

1868 Cytherura gibba (0. F. Muller); G. S. Brady, ibid., p. 444, pi. XXXII, figs. 68-70

[non C. gibba (O. F. Muller, 1785)] [ cf ] .

1868 Cytherura lineata sp. nov. G. S. Brady, ibid., p. 441, pi. XXXII, figs. 30-34, 67

[ juveniles] .

1874 Cytherura gibba (0. F. Muller); G. S. Brady, W. H. Crosskey & D. Robertson,

Palaeontogr . Soc. (Monogr.), vol. for 1874, p. 198, pi. XIII, figs. 26-29 [ non

C. gibba (O. F. Muller, 1785)].

1925 Cytherura intumescens sp. nov. G. 0. Sars, An account of the Crustacea of Norway

vol. 9, Ostracoda , Bergen Museum, pts. 11, 12, p. 206, pi. XCVI , fig. 1.

Explanation of Plate 2:14:78

Fig. 1, 9 RV, ext. lat. (lectotype, 580 ym long); fig. 2, d LV, ext. lat. (paralectotype ,

640 ym long) .

Scale A (100 ym ; x]_50) , figs. 1, 2.

Stereo-Atlas of Ostracod Shells, 2:14:79 Semicytherura cornuta (3 of 8)

Lectotype: (here designated) A 9 RV, housed with the Brady Collection in the

Hancock tlus . , Newcastle-upon-Tyne ; no catalogue number, but placed in a

separate, labelled slide.

[Paralectotype: a d LV. No catalogue number; housed as for the

lectotype] .

Type locality: Birtirbuy (= Bertraghboy) Bay, Co. Galway, W Ireland (approx, long.

9° 90 ' W, lat. 53 ° 23 1 N) . Recent.

Figured specimens: Hancock Mus. specimens: Lectotype (9 RV: Pi. 2:14:78, fig. 1), para-

lectotype {d LV : Pi. 2:14:78, fig. 2); both from the type locality, coll,

by G. S. Brady in 1868. Brit. Mus. (Nat. Hist.) nos. 1974.120 (9 car.:

PI. 2:14:80, fig. 1), 1974.121 (d car.: Pi. 2:14:80, fig. 2), 1974.122

(d RV: PI. 2:14:82, fig. 1), 1974.123 (d LV: Pi. 2:14:82, figs. 2, 3),

1974.124 (juv-1 car.: PI. 2:14:84, fig. 1), 1974.125 (d LV: Pi. 2:14:84,

figs. 2 , 3) .

Nos. 1974.120-122, 124, 125 (living at the time of collection), were

obtained from a sample of green-algae in East Fleet, Dorset, S England

(approx, long. 2°29'W, lat. 50°36'N); salinity 34%c , water temperature

20°C, shallow water; coll. Aug. 1969 by J. E. Whittaker. No. 1974.123

(dead) is from Bran Point, Weymouth Bay, S England (approx, long. 2°22'W,

lat. 50°38'N) .

Explanation of Plate 2:14:80

Fig. 1, 9 car., ext. dors. (1974.120, 550 ym long); fig. 2, d car., ext. dors. (1974.121,

660 ym long) .

Scale A (100 ym ; xiso) , figs. 1, 2.

Stereo-Atlas of Ostracod Shells, 2:14:80

Semicytherura cornuta (4 of 8)

Stereo-Atlas of Ostracod Shells, 2:14:78

Semicytherura cornuta (2 of 8)

Stereo-Atlas of Ostracod Shells, 2:14:81 Semicytherura cornuta (5 of 8)

Diagnosis: Carapace large for the genus (c. 0.55-0.65 mm long). Ventral surface

ornamented by strong longitudinal costae, one of which gives rise to a

small posteroventral ala; rest of shell reticulate and finely punctate,

but ornament often subdued anterodorsally . Internally, posterior line of

concrescence reaches strongly forward, in males to a point well into the

anterior half of the valve. Sexual dimorphism pronounced, males more

elongate and strongly inflated posteriorly.

Remarks: The opportunity is taken to clarify and re-illustrate this poorly known

NW European species. Confusion arose in the first place partly from the

misleading drawing of the female in lateral view in Brady's monograph of

1868 (pi. XXXII, fig. 12) - which may have been accidentally transposed

with fig. 68 on the same plate - and partly to Brady's own confusion of

the male of this species with that of Cytherura gibba (O. F. Muller) .

This latter aspect was discussed in my paper on C. gibba ( Stereo-Atlas of

Ostracod Shells , vol. 1, pt. 4, pp. 273-280, 1973).

Thanks to the kind co-operation of Dr. M. E. Christiansen (Zoological

Mus., Oslo) I have also been able to study the types of C. intumescens

Sars, 1925. The carapace of Sars' female holotype (no. F.1424) was

compared with females in Brady's slides of Birtirbuv Bay, and the

copulatory appendage of the male (in slide no. F.7996) with that shown in

PI. 2:14:82, fig. 1 of this paper and other dissected males of S. cornuta

in my collection. I am firmly of the opinion that the two are conspecific.

Explanation of Plate 2:14:82

Fig. 1, d RV, int. lat. showing soft-parts (1974.122, 590 ym long). Figs. 2, 3, d LV,

int. lat. (1974.123, 620 ym long); fig. 2, ant. hinge; fig. 3, post, hinge.

Scale A (100 ym ; xi65) , fig. 1; scale B (25 ym ; x400) , figs. 2, 3.

Stereo-Atlas of Ostracod Shells, 2:14:83 Semicytherura cornuta (7 of 8)

Remarks (contd.): The only species which could now be confused with S. cornuta in NW

European waters is S. acuticostata (Sars, 1866, Forh. VidenskSelsk .

Krist. , vol. for 1865, p. 76). The latter, however, is smaller (adults

c. 0.50 mm long), has a number of strong longitudinal carinae on the

upper surface of its valves and has males which are relatively less

tumid posteriorly.

Distribution: Recorded as Cytherura cornuta only from the coasts of Britain and

Ireland. Two records, under the name of C. intumescens , however, extend

the geographical range to the NW coast of France (de Vos, 1957, Archs.

Zool. exp. gen., vol. 95, p. 42) and the S coast of Norway (Sars, 1925).

I was unable to find the specimens from the Dardanelles, Turkey (see

Brady, op. cit. , p. 445) but it is thought they would most likely have

belonged to one of G. W. Muller's Mediterranean species, a number of

which look superficially like S. cornuta.

Little is known of the ecology of the species. Of the previous live

records, Sars merely states that it was found between 10 and 30 fathoms

(18-54 m) , de Vos is not specific, but the biotope of her material would

appear to be sea-grass or marine-algae. I have found it myself on marine-

algae in the littoral zone.

Stratigraphical range: Pleistocene-Recent.

Explanation of Plate 2:14:84

Fig. 1, juv-1 car., ext. rt. lat. (1974. 124, 470 ym long). Figs. 2, 3, d LV , ext. lat.

(1974.125, 590 ym long): fig. 2, detail of ant. dors, region, showing subdued ornament,

eye-spot & simple pores; fig. 3, detail of post-vent, region, showing well developed

ornament.

Scale A (100 ym ; *150), fig. 1; scale B (25 ym ; *400) , figs. 2, 3.

Semicytherura cornuta (8 of 8)

Stereo-Atlas of Ostracod Shells, 2:14:84

Stereo-Atlas of Ostracod Shells, 2:14:82

Semicytherura cornuta (6 of 8)

Stereo-Atlas of Ostracod Shells, 2:15:85-92 (1974) Semicytherura sella (1 of 8)

595.337.14 (119.9) (423.3:162.003.50 + 261.27:162.006.55 + 261.268:162.002.50): 551.351

ON SEMICYTHERURA SELLA (SARS)

by Jolm E. Whittaker

( British Museum (Natural History) 3 London )

Semicytherura sella (Sars, 1866)

1866 Cytherura sella sp. nov. G. O. Sars, Forh. VidenskSelsk . Krist. , vol. for 1865, p. 73.

1868 Cytherura cuneata sp. nov. G. S. Brady, Trans. Linn. Soc . Lond . , vol. 26, pt. 2,

p. 442, pi. XXXII, figs. 35-38, 63 [rf] .

1869 Cytherura flavescens sp. nov. G. S. Brady, Ann. Mag. nat . Hist., ser. 4, vol. 3,

p. 49, pi. VIII, figs. 13-15 [9].

1957 Semicytherura sella (Sars); C. W. Wagner, Sur les Ostracodes du Quaternaire recent

des Pays-Bas et leur utilisation dans 1' etude geologique des depots holocbnes , Mouton

& Co., The Hague, p. 85, pi. XL.

Type specimens: The Curators of Invertebrates at the Zoological Museums of Oslo and

Bergen (respectively, M. E. Christiansen and J. Kjennerud) report (pers.

comm.) that no specimens of Cytherura sella exist in Sars' collections

at these repositories. The type must, therefore, be presumed lost.

Type locality: Oslo Fjord, Norway.

Explanation of Plate 2:15:86

Fig. 1, 9 car., ext. It. lat. (1974.112, 410 ym long); fig. 2, d car., ext. It. lat.

(1974.113, 430 ym long); fig. 3, juv-1 car.: ext. It. lat. (1974.114, 360 ym long).

Scale A (100 ym ; xl50) , figs. 1-3.

Stereo-Atlas of Ostracod Shells, 2:15:87 Semicytherura sella (3 of 8)

Figured specimens: Brit. Mus. (Nat. Hist.) nos. 1974.112 (9 car.: Pi. 2:15:86, fig. 1),

1974.113 (d car.: PI. 2:15:86, fig. 2; PI. 2:15:92, fig. 1), 1974.114

(juv-1 car.: PI. 2:15:86, fig. 3), 1974.115 (9 car.: Pi. 2:15:88, fig. 1) ,

1974.116 ( d car.: PI. 2:15:88, fig. 2; PI. 2:15:92, fig. 2), 1974.117

(d car.: PI. 2:15:88, lig. 3; Pi. 2:15:92, fig. 3), 1974.118 (9 LV:

PI. 2:15:90, figs. 1, 3, 4), 1974.119 (9 RV: Pi. 2:15:90, fig. 2).

Nos. 1974.112-117 from various stations in East Fleet, Dorset,

S England (approx, long. 2°29-31'W, lat. 50°35-36'N); coll, by the

author from sand scrapings and sediment from the holdfasts of seaweeds;

living at the time of collection in salinities of 30-35%o and water

temperatures of 5-20°C. No. 1974.118 (dead) from off Tarbert, Loch Fyne ,

W Scotland (approx, long. 5°26'W, lat. 55°52'N), taken from a slide

(no. 1900.3.6.337) in the Brit. Mus. (Nat. Hist.), collected 1876.

No. 1974.119 (dead) from the entrance to Christchurch Harbour, Hampshire,

S England (approx, long. 1°45'W, lat. 50°43'N); coll, by Dr. J.W. Murray,

Univ. of Bristol, in 1960, to whom thanks are due for the donation of the

material .

Diagnosis: Adults small (c. 0.40-0.45 mm long) , dorsal and ventral margins of shell

sub-parallel. Ornament reticulate, but longitudinal costae more strongly

developed than transverse costae; intervening areas finely punctate.

Males more elongate and tumid mid-posteriorly .

Explanation of Plate 2:15:88

Fig. 1, 9 car., ext. dors. (1974.115, 430 ym long); fig. 2, d car., ext. dors. (1974.116,

450 ym long); fig. 3, d car., ext. vent. (1974.117, 430 ym long).

Scale A (100 ym ; x]_40) , figs. 1-3.

Semicytherura sella (2 of 8)

Semicytherura sella (4 of 8)

Stereo-Atlas of Ostracod Shells, 2:15:86

Stereo-Atlas of Ostracod Shells, 2:15:88

Stereo-Atlas of Ostracod Shells, 2:15:89 Semicgtherura sella (5 of 8)

Remarks: The forms described as C. cuneata and C. flavescens are both synonymous

with the present species; the reasons for the confusion being given by

Brady & Norman, 1889 ( Scient . Trans. R. Dubl . Soc . , ser. 2, vol. 4,

p. 194) . On studying more material from various localities in Britain and

comparing them with the Scandinavian types of C. sella, these authors

somewhat belatedly corrected the mistake.

Distribution: A marine or near-marine species confined, on present evidence, to the

coasts of NW Europe. Reliable living records exist from the Arcachon

Basin, SW France (Yassini, 1969, Bull. Inst. Geol . Bassin Aquitaine ,

vol. 7, p. 90) in the S, to the S coast of Norway (Sars, 1866) in the N,

including the Baltic Sea. Unlike most species of Semicgtherura , which

appear to be phytal in habit, S. sella seems to be confined to the

benthos, mostly silt and sand substrates or amongst sediment trapped by

the holdfasts of marine-algae. It is, in fact, probably a "silt-eater", as

the stomach sac was seen on dissection by the author to be full of fine

sand grains when viewed under cross-polarised light.

Stratigraphic range: Pleistocene-Recent.

Explanation of Plate 2:15:90

•Fig. 1, 9 LV, int. lat. (1974.118, 450 urn long); fig. 2, 9 RV, int. lat. (1974.119, 440 ym

long). Figs. 3, 4, 9 LV, int. lat. (1974.119): fig. 3, ant. hinge; fig. 4, post, hinge.

Scale A (100 ym ; xl50) , figs. 1, 2; scale B (25 ym ; x500) , figs* 3, 4.

Stereo-Atlas of Ostracod Shells, 2:15:91 Semicgtherura sella (7 of 8)

Explanation of Plate 2:15:92

Fig. 1, d car., detail of mid-region of shell (1974.113); fig. 2, d car., detail of ant.

dors, region, showing eye-spot (1974.116); fig. 3, d car., detail of post, part of venter,

showing simple pore & bifid seta (1974.117).

Scale (25 ym ; x73Q) , figs. 1, 2; scale B (10 ym ; x]_800) , fig. 3.

Stereo-Atlas of Ostracod Shells, 2:15:92

Semicytherura sella (8 of 8)

H--J- -

Stereo-Atlas of Ostracod Shells, 2:15:90

Semicytherura sella (6 of 8)

Stereo-Atlas of Ostracod Shells, 2:16:93-100 (1974) Semicytherura sulcata (1 of 8)

595.337.14 (119.1) (262.2:161.035.36): 551.351

ON SEMICYTHERURA SULCATA (G. W. MULLER)

by Neriman Doruk

(University of Leicester 3 England)

Semicytherura sulcata (G. W. FCiller, 1894)

i

1894 Cytherura sulcata sp. nov. G. W. Muller, Fauna Flora Golf. Neapel , Monogr. 21, p. 297,

pi. 17, figs. 4, 10; pi. 19, fig. 19.

1959 Semicytherura sulcata (G. W. Muller); G. Ruggieri, Atti Soc . ital . Sci . nat., vol. 98,

p. 205.

.1968 Semicytherura sulcata (G. W. Muller); M. Masoli, Memorie Mus . trident. Sci. nat.,

vol. 17, fasc. 1, p. 45, pi. 10, figs. 156, 157.

Holotype: Housed in the collections of the Crustacea Section of the Zoological

Museum, Berlin; catalogue no. 9^25. See Diebel, Geologie, vol. 11, pt. 2,

p. 245, 1962.

Type locality: Recent, Bay of Naples, W Italy; associated with the sea-grass Posidonia .

Explanation of Plate 2:16:94

Fig. 1, d R V, ext. lat. (10 5623, 470 ym long); fig. 2, 6 LV, ext. lat. (10 5624, 520 ym

long) .

Scale A (250 ym ; xl83) , fig. 1; scale B (250 ym ; xi64) , fig. 2.

Stereo-Atlas of Ostracod Shells, 2:16:95 Semicytherura sulcata (3 of 8)

Figured specimens: Brit. Mus. (Nat. Hist.) nos. 10 5623 (d RV: Pi. 2:16:94, fig. 1),

10 5624 (d LV: Pi. 2:16:94, fig. 2; PI. 2:16:96, figs. 1, 3), 10 5625

(9 RV: PI. 2:16:96, fig. 2; PI. 2:16:100, fig. 2), 10 5626 (d RV:

PI. 2:16:98, fig. 1), 10 5627 (9 LV: PI. 2:16:98, fig. 2), 10 5628

(d RV: Pi. 2:16:100, fig. 1). All from a drilling off Iskenderun Bay,

S coast of Turkey, 400 ft below sea-floor. Pleistocene; presumed shallow

marine/littoral. Approx, long. 35°59'E, lat. 36°37'N.

Diagnosis: Carapace elongate; surface costate (diagnostic pattern), punctate in

intervening sulci, number of puncta highly variable.

Remarks: Variation in the development of puncta is continuous from very few

(Pi. 2:16:94, fig. 1; PI. 2:16:98, figs. 1, 2) to very many (Pi. 2:16:94,

fig. 2; PI. 2:16:100, fig. 1) and even to coalescence of puncta to form

fossae (PI. 2:16:100, fig. 2). Sexual dimorphism fairly strong; males

more elongate and slightly inflated posteriorly (cf. d: Pi. 2:16:98,

fig. 1 with 9: Pi. 2:16:98, fig. 2).

Distribution: Recent in Gulf of Naples (type locality) and Adriatic Sea (Masoli, op.

cit . ) , Italy.

Quaternary in Italy (Ruggieri, op. cit.).

Pleistocene in Turkey (herein) .

Explanation of Plate 2:16:96

Fig. 1, d LV, int. lat. (10 5624); fig. 2, 9 RV, int . lat. (10 5625, 470 ym long); fig. 3,

d LV, int. muse. sc. (10 5624) .

Scale A (250 ym ; ><135) , fig. 1; scale B (250 ym ; xi5i) , fig. 2: scale C (100 ym ; x4i8) ,

fig. 3.

Stereo-Atlas of Ostracod Shells, 2:16:94

Semicytherura sulcata (2 of 8)

Stereo-Atlas of Ostracod Shells, 2:16:96

Semicytherura sulcata (4 of 8)

Stereo-Atlas of Ostracod Shells, 2:16:97 Semicytherura sulcata (5 of 8)

Explanation of Plate 2:16:98

Fig. 1, d RV, ext. lat. (10 5626, 520 ym long); fig. 2, 9 LV, ext. lat. (10 5627, 440 ym

long) .

Scale A (250 ym ; xl64) , fig. 1; scale B (250 ym ; *198) , fig. 2.

Stereo-Atlas of Ostracod Shells, 2:16:99 Semicytherura sulcata (7 of 8)

Explanation of Plate 2:16:100

Fig. 1, d RV, ext. lat. (10 5628, 520 ym long); fig. 2, 9 RV , ext. lat. (10 5625).

Scale A (250 ym ; x]_58) , fig. 1; scale B (250 ym ; *181) , fig. 2.

Stereo-Atlas of Ostracod Shells, 2:16:98 Semicytherura sulcata (6 of 8)

Stereo-Atlas of Ostracod Shells, 2:16:100 Semicytherura sulcata (8 of 8)

Stereo-Atlas of Ostracod Shells, 2:17:101-104 (1974) Semicytherura ruggierii (1 of 4)

595.337.14 (118.22 + 119.1) (262.2:161.035.36): 551.351

ON SEMICYTHERURA RUGGIERII (PUCCI)

by Neriman Doruk

(University of Leicester 3 England)

Semicytherura ruggierii (Pucci, 1955)

1955 Cytherura ruggierii sp. nov. A. Pucci, G. Geol . , ser. 2, vol . 25, p. 167, pi. 1,

figs. 3, 4, text-fig. 1.

1972 Semicytherura ruggierii (Pucci); H. Uffenorde, Gottinger Arb. Geol. Palaont . , no. 13,

p. 92, pi. 11, figs. 2, 4.

Holotype : cf LV, 0. C. R. , slide no. 878; in the Istituto di Geologia e

Paleontologia , University of Palermo, Italy.

Type locality: The Tronto Valley, E Italy; approx, long. 13°45'E, lat. 42°50'N.

Pleistocene clay (Calabrian) .

Diagnosis: Smooth to reticulate surface, sexually dimorphic ornament.

Explanation of Plate 2:17:102

Fig. 1, 9 RV, ext. lat. (10 5636, 500 ym long); fig. 2, d LV, ext. lat. (broken, 480 ym

long); fig. 3, detail of a celate normal pore (10 5637).

Scale A (250 ym ; xl64) , fig. 1; scale B (250 ym ; x]_70) , fig. 2; scale C (5 ym ; ><4756) ,

fig. 3.

Stereo-Atlas of Ostracod Shells, 2:17:103 Semicytherura ruggierii (3 of 4)

Figured specimens: Brit. Mus. (Nat. Hist.) nos. 10 5636 (9 RV: PI. 2:17:102, fig. 1),

10 5637 (d RV: PI. 2:17:102, fig. 3; Pi. 2:17:104, fig. 2), 10 5638

(9 LV : PI. 2:17:104, fig. 1). The valve (d LV) figured in PI. 2:17:102,

fig. 2; PI. 2:17:104, fig. 3, has been broken after the stereoscan

process .

10 5636 and 10 5638 from a drilling off Iskenderun Bay, S coast of

Turkey, 430 ft below sea-bed; Pleistocene; presumed shallow marine;

approx, long. 35°59'E, lat. 36°37'N. 10 5637 and figured broken

specimen from a drilling off S coast of Turkey, 630 ft below sea-floor;

Plio-Pleistocene ; presumed littoral; approx, long. 35°45'E, lat. 36°28'N.

Remarks: Variable in ornament, surface smooth between costae (see PI. 2:17:102,

fig. 1) or can be wholly reticulate (as figured in Uffenorde, op. cit. ,

pi. 11, figs. 2, 4). But variation is continuous; intermediate form

figured in PI. 2:17:102, fig. 2. Sexual dimorphism very pronounced;

males more elongate and with median rib lacking in females (cf. 9:

PI. 2:17:102, fig. 1, with d: PI. 2:17:102, fig. 2).

Distribution: Plio-Pleistocene and Pleistocene in Turkey; Pleistocene in Italy (Pucci,

op. cit.). Recent in the Adriatic (Uffenorde, op. cit.) and Aegean Seas

(Barbeito-Gonzalez , 1971, Mitt. hamb. zool . Mus. Inst., vol. 6, p. 293),

E Mediterranean.

Explanation of Plate 2:17: 104

Fig. 1, 9 LV, int. lat. (10 5638, 470 ym long); fig. 2, d RV, int. lat. (10 5637, 490 ym

long); fig. 3, d LV, int. muse. sc. (broken).

Scale A (250 ym ; xl49) , fig. 1; scale B (250 ym ; xl40) , fig. 2; scale C (100 ym ; x5i8) ,

fig. 3.

Stereo-Atlas of Ostracod Shells, 2:17:102

Semicytherura ruggierii (2 of 4)

Stereo-Atlas of Ostracod Shells, 2:17:104

Semicytherura ruggierii (4 of 4)

Stereo-Atlas of Ostracod Shells, 2:18:105-112 (1974) Semicytherura incongruens (1 of 8)

595.337.14 (118.22+119.1) (262.2:161.035.36): 551.351

ON SEMICYTHERURA INCONGRUENS (G. W. MULLER)

by Neriman Doruk

(University of Leicester, England)

Semicytherura incongruens (G. W. Miiller, 1894)

H 1894 Cytherura incongruens sp. nov. G. W. Muller, Fauna Flora Golf. Neapel , Monogr. 21,

p. 296, pi . 17 , figs . 2 , 7 , 8 ; pi . 19 , fig. 7 .

M 1968 Semicytherura incongruens (G. W. Muller); M. Masoli, Memorie Mus . trident. Sci. nat . ,

vol. 17, fasc. 1, p. 40, pi. 10, figs. 141-144.

Holotype: Housed in the collections of the Crustacea Section, Zoological Museum,

Berlin; catalogue no. 9224. See Diebel, Geologie , vol. 11, pt. 2, p. 245,

1962.

Type locality: Muller's type came from a sample of Posidonia sea-grass, Bay of Naples,

W Italy.

Diagnosis: Carapace, ovate. Ventral half of shell longitudinally costate, variably

reticulate and strongly punctate, remainder smooth to punctate.

Explanation of Plate 2:18:106

Fig. 1, 9 RV, ext. lat. (10 5620, 480 ym long); fig. 2, 9 LV, ext. lat. (10 5621, 560 ym

long) .

Scale A (250 ym ; xl80) , fig. 1; scale B (250 ym ; *154), fig. 2.

Stereo-Atlas of Ostracod Shells, 2:18:107 Semicytherura incongruens (3 of 8)

Figured specimens: Brit. Mus. (Nat. Hist.) 10 5620 (9 RV: Pi. 2:18:106, fig. 1), 10 5621

(9 LV: PI. 2:18:106, fig. 2; Pi. 2:18:108, fig. 1; PI. 2:18:112,

fig. 2), 10 5622 (d RV: PI. 2:18:108, figs. 2, 3; PI. 2:18:110, fig. 1),

10 5725 (9 RV: Pi. 2:18:112, fig. 1), 10 5726 {d LV: Pi. 2:18:110,

fig. 2) . 10 5620 and 10 5621 from drillings off Iskenderun Bay, S coast

of Turkey, 1050 ft below sea-floor; Plio-Pleistocene ; presumed shallow

marine; approx, long. 35°45'E, lat. 36°28'N. 10 5622 from drillings off

Iskenderun Bay, Turkey, 600 ft below sea-floor; Pleistocene; presumed

shallow marine; approx, long. 35°59'E, lat. 36°37'N. 10 5725 and 10 5726

from drillings off S coast of Turkey, 400 ft below sea-floor; Pleistocene;

presumed shallow marine; approx, long. 35°04'E, lat. 36°26'N.

Remarks: Very variable in number of puncta which coincide with normal pore canals.

Dorsal surface can be quite free of puncta. Sexual dimorphism distinct;

female tumid towards venter, seen dorsallv widest point in middle; males

more elongate, with slight inflation mid-posteriorlv and posteroventral

depression.

Explanation of Plate 2:18:108

Fig. 1, 9 LV, int. lat. (10 5621); fig. 2, d RV, int. lat. (10 5622, 625 ym long); fig. 3,

d RV, int. muse. sc. (10 5622) .

Scale A (250 ym ; xi22) , fig. 1; scale B (250 ym ; xiio) , fig. 2; scale C (100 ym ; x407) ,

fig. 3.

Stereo-Atlas of Ostracod Shells, 2:18:108

Semicytherura incongruens (4 of 8)

~j-

i Stereo-Atlas of Ostracod Shells, 2:18:106

Semicytherura incongruens (2 of 8)

Stereo-Atlas of Ostracod Shells, 2:18:109 Semicytherura incongruens (5 of 8)

Distribution: Recent in Gulf of Naples (type locality), Adriatic Sea (Masoli, op. cit.;

Uffenorde, 1972, Gottinger Arb . Geol . Palaont., no. 13, p. 90), Aegean

Sea (Barbeito-Gonzales , 1971, Mitt. hamb. zool . Mus. Inst., vol. 67,

p. 293), Rhone Delta, S France (Kruit, 1955, Verb. K. ned . geol. mijnb

Genoot . , Geol. ser. , vol. 15, p. 486).

Pliocene-Pleistocene in Turkey (herein) .

Explanation of Plate 2:18:110

Fig. 1, d RV, ext. lat. (10 5622); fig. 2, d LV, ext. lat. (10 5726, 600 ym long).

Scale A (250 ym ; xl31) , fig. 1; scale B (250 ym ; xi39) , fig. 2.

Stereo-Atlas of Ostracod Shells, 2:18:111 Semicytherura incongruens (7 of 8)

Explanation of Plate 2:18:112

Fig. 1, 9 RV, ext. lat. (10 5725, 580 ym long); fig. 2, 9 LV, ext. vent. obi. (10 5621).

Scale A (250 ym ; xi43) , fig. 1; scale B (250 ym ; xl47) , fig. 2.

Stereo-Atlas of Ostracod Shells, 2:18:112

Stereo-Atlas of Ostracod Shells, 2:18:110

Semicgtherura incongruens (8 of 8) ;

Stereo-Atlas of Ostracod Shells, 2:19:113-116 (1974) Semicytherura exudata (1 of 4)

595.337.14 (119.1) (262.2:161.035.36): 551.351

ON SEMICYTHERURA EXUDATA DORUK sp. nov.

by Neriman Doruk

(University of Leicester 3 England)

1968 Semicytherura

p. 47, pi. 3,

Holotype :

Type locality:

Derivation of name:

■Semicytherura exudata sp. nov.

sp. 1. M. Masoli, Memorie Mus . trident. Sci . nat . , vol. 17, fasc. 1,

fig. 26; pi. 10, figs. 158, 159.

Brit. Mus. (Nat. Hist.) no. 10 5633, 9 RV.

Drillings off Iskenderun Bay, S coast of Turkey; approx, long. 35°59'E,

lat. 36°37'H; 400 ft below sea-floor. Pleistocene.

Latin, "exude", with reference to the appearance of the normal pores.

Diagnosis: Three main ribs form a distinctive triangular pattern, rest of shell

finely reticulate. Normal pores raised with swollen rims (see

PI. 2:19:114, fig. 3) .

Explanation of Plate 2:19:114

Fig. 1, 9 RV, ext. lat. (10 5633, 490 ym long); fig. 2, d LV, ext. lat. (10 5634, 510 ym

long); fig. 3, d LV, detail of mid-dors, area with celate pores (10 5634) .

Scale A (250 ym ; x]_70) , fig. 1; scale B (250 ym ; xi64) , fig. 2; scale C (20 ym ; x656) ,

fig. 3.

Stereo-Atlas of Ostracod Shells, 2:19:115 Semicytherura exudata (3 of 4)

Figured specimens: Brit. Mus. (Nat. Hist.) nos. 10 5633 (9 RV: PI. 2:19:114, fig. 1;

PI. 2:19:116, figs. 2, 3), 10 5634 (d LV: Pi. 2:19:114, figs. 2, 3),

10 5635 (9 LV: Pi. 2:19:116, fig. 1). All from the type locality;

presumed shallow marine.

Remarks: Differs from the closely related species S. punctata (G. W. Muller)

(1894, Fauna Flora Golf. Neapel , Monogr. 21, pp. 292, 293) and

S . tergestina Masoli (op. cit. , p. 160) in ornament detail. Strength

of ribs variable, as is development of eye tubercle. Sexual dimorphism

strong, males more elongate (see Pi. 2:19:114, figs. 1, 2).

Distribution: Known only, as far as I am aware, from the Pleistocene of S Turkey

(herein) and the Recent of the N Adriatic (Masoli, op. cit.).

Explanation of Plate 2:19:116

Fig. 1, 9 LV, int. lat. (10 5635, 530 ym long); fig. 2, 9 RV, int. lat. (10 5633); fig. 3,

9 RV, int. muse. sc. (10 5633) .

Scale A (250 ym ; xl33) , fig. 1; scale B (250 ym ; xi41) , fig. 2; scale C (100 ym ; x437) ,

fig. 3.

Stereo-Atlas of Ostracod Shells, 2:19:114

Semicytherura exudata (2 of 4)

Stereo-Atlas of Ostracod Shells, 2:19:116

Semicytherura exudata (4 of 4)

Stereo-Atlas of Ostracod Shells, 2:20:117-124 (1974) Timiriasevia mackerrowi (1 of 8)

595.337.14 (116.222) (425.72:162.002.51): 551.312

ON TIMIRIASEVIA MACKERROWI BATE

by R. G. Clements

(University of Leicester 3 England)

Timiriasevia mackerrowi Bate, 1965

1965 Timiriasevia mackerrowi sp. nov. R. H. Bate, Palaeontology , vol. 8, pp. 756-758,

pi. Ill, figs. 2-12.

non 1971 Timiriasevia cf. mackerrowi Bate; F. W. Anderson in F. W. Anderson & R. A. Bazley,

Bull. geol. Surv. Gt Br . , 34, p. 133, figs. 12, 13.

Holotype : Brit. Mus. (Nat. Hist.) 10 2734, 9 carapace.

Type locality: Old Cement Quarry, Kirtlington, Oxfordshire, England; Nat. Grid Ref.:

SP 495200. Fimbriata-waltoni Clay (see Bate, op. cit.), White Limestone,

Bathonian, Middle Jurassic.

Figured specimens: Brit. Mus. (Nat. Hist.) nos. 10 6270 (9 LV: Pi. 2:20:118, fig. 1),

10 6271 (9 RV: Pi. 2:20:118, fig. 2), 10 6272 (9 RV: Pi. 2:20:118,

fig. 3), 10 6273 (9 LV: PI. 2:20:120, fig. 4; Pi. 2:20:122, fig. 7;

PI. 2:20:124, fig. 1) .

Explanation of Plate 2:20:118

Fig. 1, 9 LV, ext. lat. (10 6270, 710 ym long); fig. 2, 9 RV, ext. lat. (10 6271, 550 ym

long); fig. 3, 9 RV, ext. lat. (10 6272, 550 ym long); fig. 4, cf RV, ext. lat. (10 6276,

530 ym long); fig. 5, d RV, ext. lat. (10 6277 , 530 ym long).

Scale A (100 ym ; xl20) , fig. 1; scale B (100 ym ; x80) , figs. 2-5.

Stereo-Atlas of Ostracod Shells, 2:20:119 Timiriasevia mackerrowi (3 of 8)

10 6274 (9 RV: PI. 2:20:120, fig. 5; PI. 2:20:124, fig. 2), 10 6275

(9 car.: PI. 2:20:122, fig. 3), 10 6276 (cf RV: Pi. 2:20:118, fig. 4),

IO 6277 (d RV: PI. 2:20:118, fig. 5), 10 6278 (d LV: PI. 2:20:120,

fig. 1), IO 6279 (cf LV: PI. 2:20:120, fig. 2), IO 6280 (cf car.:

PI. 2:20:122, figs. 1, 5), 10 6281 (cf car.: Pi. 2:20:122, fig. 2),

IO 6282 (cf car.: PI. 2:20:122, fig. 6), 10 6283 (cf RV: PI. 2:20:124,

fig. 3), IO 6284 (d RV: text-fig. 1), 10 6285 (juv RV: Pi. 2:20:120,

fig. 3), IO 6286 (juv car.: Pi. 2:20:122, fig. 4). All from same sample

as measured specimens. Forest Marble, Elm Farm Quarry.

Timiriasevia with greatest height distinctly posterior. Anterior

marginal sulcus. Costae rounded, sub-parallel to margins and roughly

concentric about a sub-triangular to elongate mid-lateral region.

Small, rounded, perforate tubercles particularly in anterior and

posterior regions - the latter ones normally forming a pattern of four

on each valve. About 20 radial pore canals from anterior vestibule.

Anterior and posteroventral flanges marked. Right valve posteroventral

flange extensive, frilled, oblique. Accommodation groove in left valve

only. Sexual dimorphism strong; female with pouch-like posteroventral

inflation beyond margin.

Explanation of Plate 2:20:120

Fig. 1, cf LV, ext. lat. (IO 6278, 610 ym long); fig. 2, d LV, ext. lat. (IO 6279, 520 ym

long); fig. 3, juv RV, ext. lat. (10 6285, 370 ym long); fig. 4, 9 LV, hinge (10 6273);

fig. 5, 9 RV, hinge (10 6274).

Scale A (100 ym ; xi20) , fig. 1; scale B (100 ym ; x80) , fig. 2; scale C (100 ym ; xno),

fig. 3; scale D (100 ym ; x]_08) , fig. 4; scale E (100 ym ; xi80) , fig. 5.

Figured specimens:

(contd. )

Diagnosis :

Stereo-Atlas of Ostracod Shells, 2:20:118

Timiriasevia mackerrowi (2 of 8)

Timiriasevia mackerrowi (4 of 8)

Stereo-Atlas of Ostracod Shells, 2:20:120

Stereo-Atlas of Ostracod Shells, 2:20:121 Timiriasevia mackerrowi (5 of 8)

Remarks : Lateral outline variable - reflecting position of greatest height of

carapace. Greatest height at or anterior to midline in juveniles.

Strength of ornament varies; juveniles and a few adults develop a weak

inter-costal punctation. Left valve larger than right valve. Females

larger and apparently less numerous than males. Paratype 10 2737

described by Bate (op. cit.) as a juvenile is here considered an adult

male. One sectioned female carapace contained a juvenile ostracod

carapace. Presumed low salinity, non-marine; always found associated

with other ostracods of similar presumed habitat (see Bate op. cit. and

McKerrow et al . , 1969, Palaeontology, vol. 12, pp. 56-83).

Distribution: Upper Bathonian: Fimbriata-waltoni clay (White Limestone) , Kemble Beds

(Forest Marble) , and horizons in the Wychwood Beds (Forest Marble) of

the type locality; Forest Marble [Beds 9 and 10(a)] at Elm Farm Ouarry,

Stratton Audley, Oxfordshire, Nat. Grid Ref.: SP 601255 (see Palmer,

T. J. , 1973, Proc . Geol . Ass., vol. 84, pp. 53-64).

Middle Bathonian: Viviparus Marl, Sharps Hill Beds, at Castle Barn

Ouarry, Sarsden, Oxfordshire; Nat. Grid Ref.: SP 300226.

Acknowledgement : To Prof. P.C. Sylvester-Bradlev & Dr. R.H. Bate for loan of material.

Explanation of Plate 2:20:122

Fig. 1, d car., dors. (10 6280, 570 pm long); fig. 2, d car., vent. (10 6281, 540 ym long);

fig. 3, 9 car., vent. (10 6275, 570 ym long); fig. 4, juv car., dors. (10 6286, 320 ym

long); fig. 5, d car., post. (10 6280); fig. 6, d car., post. (10 6282, 490 ym long);

fig. 7, $ LV, int. muse. sc. (10 6273).

Scale A (100 ym ; x70) , figs. 1-3, 5, 6; scale B (100 ym ; xll4) , fig. 4; scale C (50 ym ;

x375) , fig. 7.

Stereo-Atlas of Ostracod Shells, 2:20:123 Timiriasevia mackerrowi ' (7 of 8)

H - no. specimens; x = mean; SD = standard deviation.

Text-fig. 1. d RV internal (10 6284) Text-fig. 2. Sections through a series of d

showing muscle scars, and measured dimensions. and 9 carapaces to show structure of duplicature.

Explanation of Plate 2:20:124

Fig. 1, 9 LV, int. lat. (10 6273, 670 ym long); fig. 2, 9 RV, int. obi. ventro-lat. (10 6274,

540 ym long); fig. 3, d RV, int. lat. (10 6283, 540 ym long).

Scale A (100 ym ; xl00) , figs. 1-3).

Stereo-Atlas of Ostracod Shells, 2:20:122

Timiriasevia mackerrowi (6 of 8)

Stereo-Atlas of Ostracod Shells, 2:20:124

Timiriasevia mackerrowi (8 of 8)

Stereo-Atlas of Ostracod Shells, 2:21:125-132 (1974) Pennyella pennyi (1 of 8)

595.337.14 (116.333.3) (941:163.115.32): 552.54

ON PENNYELLA PENNYI NEALE gen. et sp. nov.

by John W. Neale

(University of Hull3 England)

Genus PENNYELLA gen. nov.

Type-species: Pennyella pennyi sp. nov.

Derivation of name: In honour of my friend and colleague Dr. L. F. Penny.

Diagnosis: Shell of trachyleberid shape, saggital in dorsal view showing marked

sexual dimorphism, strong reticulation with spinose muri and sparse

normal pore canals. Four adductor scars, the middle two elongate, and

hook shaped frontal scar. Pennyella differs from most other trachy-

leberids in lacking an eye tubercle.

Remarks: From Agulhasina Dingle, 1971 (Maastrichtian, Agulhas Bank) it differs

in having almost twice as many radial pore canals (30 anteriorly 12

posteriorly) , in the greatest width lying posteriorly and not centrally

and in the muscle scar pattern. It lacks the ventral rib and rounded

posteroventral outline in lateral view of Agrenocythere Benson, 1971

(Eocene-Recent) .

Explanation of Plate 2:21:126

Fig. 1, 9 LV, ext. lat. (HU.67.C.1, 558 ym long); fig. 2, 9 LV, int. lat. (HU. 67. C. 5,

603 ym long) .

Scale A (100 ym ; x]_81) , fig. 1; scale B (100 ym ; xl56) , fig. 2.

Stereo-Atlas of Ostracod Shells, 2:21:127

Pennyella pennyi (3 of 8)

Pennyella pennyi sp. nov.

Holotype: University of Hull coll. no. HU.67.C.1, 9 LV.

[Paratypes: University of Hull coll. nos. HU. 67 .C. 2-10] .

Type locality: One Tree Hill, Gingin, Western Australia; approx, long. 115°52'E,

lat. 31°32'S. Santonian, Upper Cretaceous. Fine white chalk with an

abundant foraminif eral and ostracod fauna indicative of warm shelf

seas.

Figured specimens: University of Hull coll. nos. HU.67.C.1 (9 LV: Pi. 2:21:126, fig. 1;

PI. 2:21:132, fig. 1), HU. 67. C. 2 (cf RV: Pi. 2:21:128, fig. 3;

PI. 2:21:132, fig. 3), HU. 67. C. 3 (9 RV: PI. 2:21:132, fig. 2),

HU. 67. C. 4 (cf RV: Pi. 2:21:130, fig. 1), HU. 67. C. 5 (9 LV : PI. 2:21:126,

fig. 2), HU. 67. C. 9 (9 LV: Pi. 2:21:128, fig. 2), HU. 67. C. 10 (9 RV :

PI. 2:21:128, fig. 1; PI. 2:21:130, fig. 2). All from the Gingin Chalk,

Western Australia.

Diagnosis: Anterior and posteroventral margins separated from the body of the

valve by well-developed sulci divided by very fine transverse ribs.

Explanation of Plate 2:21:128

Fig. 1, 9 RV, ext. dors. (HU. 67. C. 10, 610 ym long); fig. 2, 9 LV, ext. dors. (HU. 67. C. 9,

584 ym long); fig. 3, cf RV, int. lat. (HU. 67. C. 2, 610 ym long).

Scale A (100 ym ; xi58) , figs. 1, 3; scale B (100 ym ; xl43) , fig. 2.

H-4~

Stereo-Atlas of Ostracod Shells, 2:21:126 Pennyella penny i (2 of 8)

Stereo-Atlas of Ostracod Shells, 2:21:128 Pennyella penny i (4 of 8)

Stereo-Atlas of Ostracod Shells, 2:21:129 Pennyella pennyi (5 of 8)

Remarks: So far this species has only been found in the Gingin Chalk where it

makes up about 1% of the fauna and its commonest associates are

Cytherella , Cytherelloidea , Apateloschizocythere and Paramunseyella .

The genus is more widespread. The form assigned by Swain (1973,

J. Paleont. , vol. 47, no. 4, p. 713, pi. 1, figs. 12, 13a-c) to

Cletocythereis ? from Maastrichtian in a core from the Shatsky Plateau

in the Pacific at long. 158°01.3'E, lat. 32°34.5'N belongs here.

Swain's specimens are larger than adult P. pennyi but also show the

vertical ridge posteriorly suggesting that this is also a feature of

generic importance.

Text-fig. 1. Muscle scar

pattern in P. pennyi.

la Left valve lb Right valve

Explanation of Plate 2:21:130

Fig. 1, cf RV, ext. lat. (HU. 67. C. 4, 603 ym long); fig. 2, 9 RV, ext. lat. (HU. 67. C. 10,

610 ym long) .

Scale A (100 ym ; xl66) , fig. 1; scale B (100 ym ; xi52) , fig. 2.

Stereo-Atlas of Ostracod Shells, 2:21:131

Pennyella pennyi (7 of 8)

I

Explanation of Plate 2:21:132

Fig. 1, 9 LV, ext. lat. to show ornamentation, normal pore canals & muse. sc. (HU.67.C.1);

fig. 2, 9 RV, ext. ant. obi. (HU. 67. C. 3, 584 ym long); fig. 3, d RV, int. muse. sc.

(HU. 67. C. 2, 610 ym long).

Scale A (50 ym ; x325) , fig. 1; scale B (100 ym ; xll4) , fig. 2; scale C (20 ym ; x890) ,

fig. 3.

Stereo-Atlas of Ostracod Shells, 2:21:130 Pennyella pennyi (6 of 8)

Stereo-Atlas of Ostracod Shells, 2:21:132 Pennyella pennyi (8 of 8)

Stereo-Atlas of Ostracod Shells, 2:22:133-140 (1974) Bathycythere vanstraateni (1 of 8)

595.337.14 (119.1) (262.3:161.017.41 + 262.3:161.018.41): 551.352

ON BATHYCYTHERE VANSTRAATENI SISSINGH

by W. Sis singh

(Shell U. K. Exploration & Production Co . Ltd. 3 London)

Genus BATHYCYTHERE Sis singh, 1971

1971 Bathycythere gen. nov. W. Sissingh, Proc . K. ned . Akad . Wet., Amsterdam, ser. B, 74,

no. 4, p. 409.

1971 "Xandarosina" . R. H. Benson & P. C. Sylvester-Bradley , Bull. Cent. Rech. Pau - SNPA ,

vol. 5 suppl., pp. 63-91 [nomen nudum].

Type-speoies (original designation) : Bathycythere vanstraateni Sissingh, 1971

Diagnosis : Subovate to subrectangular carapace with prominent marginal and ventro-

lateral spines. No eye tubercle. Bulbose radial pore canals. Weak

holamphidont hinge.

Explanation of Plate 2:22:134

Figs. 1-3, RV (10 6267, 1130 ym long). Fig. 1, ext. ant.; fig. 2, ext. lat.; fig. 3, ext.

vent. obi.

Scale A (250 ym ; *57), figs. 1-3.

Stereo-Atlas of Ostracod Shells, 2:22:135 Bathycythere vanstraateni (3 of 8)

Bathycythere vanstraateni Sissingh, 1971

1971 Bathycythere vanstraateni sp. nov. W. Sissingh, Proc. K. ned. Akad. Wet., Amsterdam,

ser. B, 74, no. 4, p. 410, pis. 1, 2, text-figs. 2-4.

1971 " Xandarosina " sp. R. H. Benson & P. C. Svlvester-Bradley , Bull. Cent. Rech. Pau -

SNPA, vol. 5 suppl., p. 69, figs. 3a, b.

Holotype : A left valve, deposited in the micropalaeontological collections

(S 27532) of the University of Utrecht.

Type locality: Core 355 (interval 240-270 cm) , taken in the deep basin of the SE

Adriatic Sea at a depth of 1096 m; approx, long. 18°25'E, lat. 41°30'N.

Late Pleistocene.

Figured specimens: Brit. Mus. (Nat. Hist.) 10 6267 (RV: Pi. 2:22:134, figs. 1-3;

PI. 2:22:138, fig. 1; PI. 2:22:140, figs. 1, 2), 10 6268 (LV:

PI. 2:22:136, figs. 1-3), 10 6269 (LV: Pi. 2:22:138, figs. 2, 3;

PI. 2:22:140, figs. 3, 4).

10 6267 and 10 6268 from Core 296 (interval 330-360 cm and 400-

440 cm respectively); taken from 1063 m depth at approx, long. 17°43'E,

lat. 41°16'N. 10 6269 from Core 293 (interval 80-110 cm); taken from

1198 m depth at approx, long. 18°9'E, lat. 41°44'N. All specimens are

from late Pleistocene subsurface deposits within the area of the type

locality .

Explanation of Plate 2:22:136

Figs. 1-3, LV (10 6268, 1220 ym long). Fig. 1, ext. post.; fig. 2, ext. lat.; fig. 3, ext.

dors. obi.

Scale A (250 ym ; x53) , figs. 1-3.

Bathycythere vanstraateni (4 of 8)

Stereo-Atlas of Ostracod Shells, 2:22:134

Bathycythere vanstraateni (2 of 8)

Stereo-Atlas of Ostracod Shells, 2:22:136

Stereo-Atlas of Ostracod Shells, 2:22:137

Bathijcythere vanstraateni (5 of 8)

Diagnosis: Anterior part of lateral surface smooth; spinose ventrolaterallv and

posteriorly .

Remarks: Sexual dimorphism is not convincingly observed in this species.

Presumed males seem to be somewhat smaller, relatively lower and

slightly more compressed in dorsal view than females. Dorsomedian and

ventromedian adductor muscle scar may be subdivided (see PI. 2:22:138,

fig. 3 & text-fig. 1).

Distribution: Late Pleistocene of the deep SE Adriatic Sea.

Also reported as a species of "Xandarosina" ( nomen nudum) from

Pleistocene and younger deep water deposits of the Mediterranean Sea

(Benson, R. H. & Sylvester-Bradley , P. C., op. cit.).

Explanation of Plate 2:22:138

Fig. 1, RV int. lat. (10 6267); fig. 2, LV int. lat. (10 6269, 1130 ym long); fig. 3, LV

int. muse. sc. (10 6269).

Scale A (250 ym ; x57) , figs. 1, 2; scale B (50 ym ; x200) , fig. 3.

Stereo-Atlas of Ostracod Shells, 2:22:139 Bathycijthere vanstraateni (7 of 8)

Text-fig. 1. Muscle scar pattern in B. vanstraateni ; after Sissingh (op. cit.). x115.

#

la Juvenile left valve lb Adult right valve with 1c Adult left valve with

divided dorsomedian undivided dorsomedian

adductor muscle scar adductor muscle scar

Explanation of Plate 2:22:140

Figs. 1, 2, RV int. details of terminal hinge elements (10 6267); figs. 3, 4, LV int.

details of terminal hinge elements (10 6269) .

Scale A (50 ym ; x265) , figs. 1-4.

Stereo-Atlas of Ostracod Shells, 2:22:138

Bathycythere vanstraateni (6 of 8)

Stereo-Atlas of Ostracod Shells, 2:22:140

Bathycythere vanstraateni (8 of 8)

STEREO-ATLAS OF OSTRACOD SHELLS

Contents, Volume 2, Part 2

2:13:69-76 On Semicytherura nigrescens (Baird); by J. E. Whittaker (£0.90)

2:14:77-84 On Semicytherura comuta (Brady); by J. E. Whittaker (£0.90)

2:15:85-92 On Semicytherura sella (Sars) ; by J. E. Whittaker (£0.90)

2:16:93-100 On Semicytherura sulcata (G. W. Muller) ; by N. Doruk (£0.90)

2:17:101-104 On Semicytherura ruggierii (Pucci); by N. Doruk (£0.45)

2:18:105-112 On Semicytherura incongruens (G. W. Muller); by N. Doruk (£0.90)

2:19:113-116 On Semicytherura exudata Doruk sp. nov. ; by N. Doruk (£0.45)

2:20:117-124 On Timiriasevia mackerrowi Bate; by R. G. Clements (£0.90)

2:21:125-132 On Pennyella pennyi Neale gen. et sp. nov.; by J. W. Neale (£0.90)

2:22:133-140 On Bathycythere vanstraateni Sissingh; by W. Sissingh (£0.90)

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