A Stereo-Atlas of Ostracod Shells
edited by J. Athersuch, D. J. Horne, D. J. Siveter,
and J. E. Whittaker
Volume 19, Part 2; 31st December, 1992
Published under the aegis of the British Micropalaeontological Society, London
ISSN 0952-7451
Editors
Dr J. Athersuch, StrataData Ltd., 16 Ottershaw Park, Ottershaw, Surrey KT16 OGQ.
Dr D.J. Horne, School of Earth Sciences, University of Greenwich, Walburgh House, Bigland Street,
London El 2NG.
Dr David J. Siveter, Department of Geology, The University, Leicester LEI 7RH.
Dr J.E. Whittaker, Department of Palaeontology, British Museum (Natural History), Cromwell Road,
London SW7 5BD.
Editorial Board
Dr J.-P. Colin, Esso Production Research - European, 213 Cours Victor Hugo, 33321 Begles, France.
Dr MA Ayress, Department of Geology, Australian National University, G.P.O. Box 4, Canberra,
ACT 2601, Australia.
Dr W. Hansch, Ernst-Moritz-Arndt Universitat, Sektion Geologische Wissenschaften, F.L.-Jahnstr. 17a,
2200 Greifswald, Germany.
Prof. R. Lundin, Department of Geology, Arizona State University, Tempe, Arizona 85287-1404, U.SA.
Dr R.E.L. Schallreuter, Universitat Hamburg, Geologisch-Palaontologisches Institut, Bundesstrasse 55,
D 2000 Hamburg 13, Germany.
Prof. N. Ikeya, Institute of Geosciences, Shizuoka University, Shizuoka 422, Japan.
Officers of the British Micropalaeontological Society
Chairman Professor M.B. Hart, Department of Geological Sciences, University of Plymouth, Drake Circus,
Plymouth, Devon PL4 8AA.
Secretary Dr J.B. Riding, British Geological Survey, Keyworth, Nottingham NG12 5GG.
Treasurer Dr I.P. Wilkinson, British Geological Survey, Keyworth, Nottingham NG12 5GG.
Journal Editor Dr M.C. Keen, Department of Geology, The University, Glasgow G12 8QQ.
Newsletter Editor Dr D.J. Shipp, The Robertson Group pic, T/n-y-Coed, Llanrhos, Llandudno,
Gwynedd LL30 ISA.
Conodont Group Chairman Dr J.J. Stone, Department of Geology, Trinity College, Dublin 2, Ireland.
Conodont Group Secretary Dr S.J. Tull, Cambridge Arctic Shelf Programme, West Building, Gravel Hill,
Huntington Road, Cambridge CB3 0DJ.
Foraminifera Group Chairman Dr H.W. Bailey, PaleoServices Ltd., Unit 15, Paramount Industrial Estate,
Sandown Road, Watford WD2 4XA.
Foraminifera Group Secretary Dr S.R. Packer, Millenia Stratigraphic Consultants, Unit 3, Weyside Park,
Newham Lane, Alton, Hampshire GU34 2PJ
Ostracod Group Chairman Dr N.R. Ainsworth, PaleoServices Ltd., Unit 15, Paramount Industrial Estate,
Sandown Road, Watford WD2 4XA
Ostracod Group Secretary Dr I.D. Boomer, School of Environmental Sciences, University of East Anglia,
Norwich NR4 7TJ.
Palynology Group Chair Dr R.J. Davey, The Robertson Group pic, Ty’n-y-Coed, Llanrhos, Llandudno,
Gwynedd LL30 ISA.
Palynology Group Secretary Dr A. McNestry, British Geological Survey, Keyworth, Nottingham NG12 5GG.
Calcareous Nannofossil Group Chairman Dr L.T. Gallagher, Paleo Services, Unit 15, Paramount Industrial
Estate, Sandown Road, Watford WD2 4XA.
Calcareous Nannofossil Group Secretary Dr N.M. Hine, British Geological Survey, Keyworth, Nottingham
NG12 5GG.
Instructions to Authors
Contributions illustrated by scanning electron micrographs of Ostracoda in stereo-pairs are invited. Format
should follow the style set by the papers in this issue. Descriptive matter apart from illustrations should be
cut to a minimum; preferably each plate should be accompanied by only one page of text. Blanks to aid in
mounting figures for plates may be obtained from any one of the Editors or Editorial Board. Completed
papers should be sent to one of the Editors. All contributions submitted for possible publication in the
Stereo-Atlas of Ostracod Shells are reviewed by an appropriate international specialist.
The front cover shows male left valves of Palmoconcha guttata (Norman, 1865) "normal form" (upper) and
"granulata" form of Sars, 1866 (lower). Both Recent, from off Sunderland, NE England and Isle of Bute, SW
Scotland, respectively. Hancock Museum, Newcastle-upon-Tyne, nos. 1.20.14 and 1.20.15. Photographed by
J.E. Whittaker.
A Stereo-Atlas of Ostracod Shells
edited by J. Athersuch, D. J. Horne, D. J. Siveter,
and J. E. Whittaker
Volume 19, 1992
Part 1 (pp. 1-60); 31st July, 1992
Part 2 (pp. 61-133); 31st December, 1992
Published under the aegis of the British Micropalaeontological Society, London
Stereo-Atlas of Ostracod Shells 19, ii
Contents
Contents
1 On Cytheropteron byfieldense Boomer & Bodergat sp. nov.; by I. Boomer & A.-M. Bodergat. 1
2 On Pejonesia sestina (Fleming); by I.C.U. Hinz. 5
3 On Tubupestis tuber Hinz & Jones gen. et sp. nov.; by I.C.U. Hinz & P.J. Jones. 9
4 On Semiilia pauper Hinz gen. et sp. nov.; by I.C.U. Hinz. 13
5 On Cuneoceratina exomata (Herrig); by E. Herrig. 17
6 On Scaldiartella simplex (Krause); by L.E. Petersen & R.F. Lundin. 21
7 On Glyptopleuroides insculptus Croneis & Gale; by C.P. Dewey & J.E. Coker. 25
8 On Glezeria belgica (Matern); by G. Becker & M. Coen. 29
9 On Kanyginia hartmanni Schallreuter & Kanygin sp. nov.; by R.E.L. Schallreuter &
A.V. Kanygin. 33
10 On Fidelitella (Sibiritella) rara (Ivanova); by R.E.L. Schallreuter & A.V. Kanygin. 37
11 On Pseudocandona ceratina Mazepova; by K. Martens, I. Noskova & G. Mazepova. 41
12 On Pseudocandona gajewskajae Bronstein; by K. Martens, I. Noskova & G. Mazepova. 49
13 On Semicytherura pulchra (Cole & Whatley); by MA. Ayress & T. Correge. 57
14 On Strandesia bicomuta Hartmann; by K. Martens & S. George. 61
15 On Geisina gregaria (Ulrich & Bassler); by R.L. Kaesler & G.D. Hecht. 67
16 On Richterina permiana Kohn & Dewey; by P. Kohn & C.P. Dewey. 71
17 On Kiuperiana juglandica Ayress sp. nov.; by MA. Ayress. 75
18 On Gerodia ratina (Griindel); by G. Becker & D. Weyer. 79
19 On Rabienoscapha tergocomuta Becker & Weyer; by G. Becker & D. Weyer. 83
20 On Processobairdia nodocerata Blumenstengel; by G. Becker & H. Blumenstengel. 87
21 On Arcacythere aurani Babinot & Colin sp. nov.; by J.-F. Babinot & J.P. Colin. 91
22 On Kindlella melnyki Dewey & Kohn sp. nov.; by C.P. Dewey & P. Kohn. 95
23 On Anchistrocheles eximia Herrig sp. nov.; by E. Herrig. 99
24 On Jonesia marecorallinensis Correge sp. nov.; by T. Correge. 103
25 On Swainocythere nanseni (Joy & Clark); by T. Correge, M. Ayress & V. Drapala. 107
26 On Rectella siveteri Petersen & Lundin; by L.E. Petersen & R.F. Lundin. Ill
27 On Eurybolbina bispinata (Harris); by M. Williams & C.G. Miller. 115
28 On Eoholina depressa (Kay); by M. Williams & C.G. Miller. 119
29 On Monasterium oepiki Fleming; by I.C.U. Hinz. 123
30 Index for Volume 19, (1992). 131
Stereo-Atlas of Ostracod Shells 19 (14) 61-66 (1992) Strandesia bicornu ta (1 of 6)
595.337.12 (119.9) (540 : 161 .076.10): 551.312
ON STRANDESIA BICORNUTA HARTMANN
by Koen Martens & Sunny George
(Royal Belgian Institute of Natural Sciences, Brussels & Christ College, Irinjalakuda, Kerala, India)
Strandesia bicornuta Hartmann, 1964
1964 Strandesia bicornuta sp. nov. G. Hartmann, Int. Revue ges. HydrobioL, (Syst. Beih.), 3, 94-98, figs. 35, 36.
Type specimens: Lecto- and paralectotypes in the Zoological Museum, Hamburg (Germany); one paralectotype, stored undissected in
Fig. 1, 9 LV, int. lat. (OC.1663, 2186 /tm long); fig. 2, o* LV, int. lat. (OC.1665, 1884 /rm long); fig. 3, 9 car., dors. (OC.1670, 2209 pm
long); fig. 4, 9 LV, ext. lat. (OC.1661, 2302 ttm long); fig. 5, O’ LV, ext. lat. (OC.1666, 1884 /rm long).
Scale A (500 pm; X430), figs. 1-5.
Stereo-Atlas of Ostracod Shells 19, 63 Strandesia bicornuta (3 of 6)
Fig. 1, 9 car., vent. (OC.1669, 2163 pm long); fig. 2, O’ car., vent. (OC.1668, 1884 //m long); fig. 3, 9 RV, ext. lat. (OC.1662, 1419/rm
long); fig. 4, 9 RV, int. lat. (OC.1663, 1419/rm long); fig. 5, cr car., dors. (OC.1667, 1860 /tm long); fig. 6, o’ RV, ext. lat. (OC.1666,
1233 pm long); fig. 7, o ■ RV, int. lat. (OC.1665, 1302 pm long). Scale A (500 ^m; x430), figs. 1-7.
Stereo-Atlas of Ostracod Shells 19, 62 Strandesia bicornuta (2 of 6)
Stereo-Atlas of Ostracod Shells 19, 65 Strandesia bicornuta (5 of 6)
Text-fig. 1A-H, appendages; A, 9, A1 (OC.1661); B, cr, A2, detail of distal chaetotaxy (OC.1665); C, 9, idem. (OC.1662); D, 9, Mxl,
respiratory plate not shown (OC.1661); E, 9, A2 (OC.1661); F, cr, right prehensile palp (OC.1665); G, cr, hemipenis (OC.1664);
H, O', left prehensile palp (OC.1665). Scale = 46 /um for A, E; 78 fum for B-D, F-H.
Stereo-Atlas of Ostracod Shells 19, 66 Strandesia bicornuta (6 of 6)
Text-fig. 2A-I, appendages; A, 9. T1 (OC.1662); B, 9, mandibular palp, respiratory plate and chaetotaxy of terminal segment not
shown (OC.1661); C, idem., detail of chaetotaxy of terminal segment; D, 9, Mx2, palp and respiratory plate not shown (OC.1662);
E, idem., palp; F, 9, T2, detail of apical pincer (OC.1662); G, 9, furcal attachment (OC.1661); H, cr, furca (OC.1665); I, 9, furca
(OC.1662). Scale = 146 //m for G-I; 78 /am for A, B, D, E; 29 /am for C, F.
Stereo-Atlas of Ostracod Shells 19 (15) 67-70 (1992) Geisina gregaria (1 of 4)
595.33.21 (1 13.52) (781 : 162.096.38): 551.313.1 +552.52
ON GEISINA GREGARIA (ULRICH & BASSLER)
by Roger L. Kaesler & George D. Hecht
(The University of Kansas, Lawrence, Kansas, U.S.A.)
Genus GEISINA Johnson, 1936
Type-species (by original designation): Beyrichiella gregaria Ulrich & Bassler, 1906
Diagnosis: Bisulcate Kloedenellacea with anterior sulcus shallow or missing; right valve overlapping left valve along free margin but not along
hinge; hinge incised behind sulcus. Posterodorsal spine or inflated bulb present; sexual dimorphism subtle.
Geisina gregaria (Ulrich & Bassler, 1906)
1906 Beyrichiella gregaria sp. nov. E.O. Ulrich & R.S. Bassler, Proc. U.S. natn. Mus., 30, 157, pi. 8, fig. 18.
1908 Jonesina gregaria (Ulrich & Bassler); E.O. Ulrich & R.S. Bassler, Ibid. , 35, 325, 44, fig. 6.
1934 Jonesina gregaria (Ulrich & Bassler); R.S. Bassler & B. Kellett, Spec. Pap. geol. Soc. Am., 1, 346 (q. v. for full synonymy).
1936 Geisina gregaria (Ulrich & Bassler); W.R. Johnson, Pap. geol. Surv. Neb., 11, 22, 23, pi. 2, figs. 11-14.
1946 Geisina gregaria (Ulrich & Bassler); C.L. Cooper, Bull. III. St. geol. Surv., 70, 110, p. 18, figs. 1, 2.
Syn types:
Other specimens:
Type locality:
Figured specimens:
National Museum of Natural History, Washington, no. 35625; a small piece of mudstone with several dozen ostracods on the
upper bedding plane; labelled Cotypes. Because of the state of preservation, we have not selected a lectotype.
National Museum of Natural History, Washington, no. 72236; labelled Plesiotype.
Ulrich & Bassler (1906, p. 158) gave the locality only in vague terms: “Extremely abundant on bedding planes of clayey limestone
bands of the Upper Carboniferous at Kansas City, Missouri.”
Museum of Invertebrate Paleontology, The University of Kansas, Lawrence, no. KUMIP 1,127,479 (9 RV: PI. 19, 70 fig. 2),
KUMIP 1,127,480 ( 9 RV: PI. 19, 70, fig. 1), KUMIP 1,127,482 (9 RV: PI. 19, 68, fig. 2), KUMIP 1,127,483 (9 LV: PI. 19, 68,
fig. 4), KUMIP 1,127,484 (o- LV: PI. 19, 68, fig. 3), KUMIP 1,127,486 (o- dors.: PI. 19, 70, fig. 4), and KUMIP 1,127,488 (A-2
instar RV: PI. 19, 70, fig. 3). All from KUMIP locality “Clinton 4”, 1-2 cm above the upper Williamsburg coal of the Lawrence
Explanation of Plate 19, 68
Fig. 1, 9 RV, ext. lat. (KUMIP 1,127,490, 1160//m long). Fig. 2, 9 RV, ext. lat. (KUMIP 1,127,482, 1140/tm long). Fig. 3, cr LV, ext.
lat. (KUMIP 1,127,484, 1120 /mi long). Fig. 4, 9 LV, ext. lat. (KUMIP 1,127,483, 1160/rm long).
Scale A (100 pm; x50), figs. 1-4.
Stereo-Atlas of Ostracod Shells 19, 69
Geisina gregaria (3 of 4)
Diagnosis:
Discussion:
Distribution:
A cknowledgemen ts:
Formation, Virgilian, Upper Carboniferous; associated with abundant plant fragments in a roadcut at the south end of the dam
at Clinton Lake (SW 1/4, SW 1/4, NW 1/4, Sec. 20, T13S, R19E). KUMIP 1,127,490 (9 RV: PI. 19, 68, fig. 1) is from a pit,
now covered, on the construction site of the Kansas Geological Survey’s Geological Materials Facility, located (NE 1/4, SW 1/4,
Sec. 2, T13S, R19E) about 5 km from KUMIP “Clinton 4”; 1 m above the upper Williamsburg coal, associated with a diverse
marine fauna.
Species of Geisina with prominent posterodorsal spine and sometimes with subtle development of anterior spine on margin of valves.
Ulrich & Bassler (1906, op. cit., 157, pi. 11, fig. 18) misoriented the species, referring to a “large anterior lobe . . . [which] . . .
rises abruptly from the median sulcus and is always the most prominent part of the valve. Usually a small spine, occasionally of
larger size than in the figure, rises from the anterio-dorsal slope, while a faint vertical sulcus is sometimes distinguishable just
behind the spine.” In fact, the large lobe and spine are posterodorsal, and the original authors oriented the animal back to front.
Ulrich & Bassler (1906), Cooper (1946, op. cit., 110), and Pollard (Palaeontology, 9, 680, 1966) emphasized the similarity of
G. gregaria to G. arcuata, which lacks the posterodorsal spine. A small spine present on the anterior margin of adults in our
collections was not mentioned by previous authors. This spine is much more pronounced among early instars. The prominent,
posterodorsal spine is located more anteriorly on specimens associated with a diverse marine fauna (PI. 19, 68, fig. 1). This
variation is almost certainly ecophenotypical in view of the fact that among species of Geisina only G. gregaria is spinose. The
exterior of most of our specimens is coated with coarse crystals (PI. 19, 68, fig. 3); uncoated forms are smooth, showing no sign
of primary pitting or reticulation. Sexual dimorphism is expressed subtly. Females are slightly less elongate than males and are
more inflated posteriorly. The inflated portion may extend above the hinge. Girty (Bull. U.S. geol. Surv., 377, 72, pi. 5, fig. 7,
1909) described Entomis unicornis, a species that is remarkably similar to G. gregaria and that needs additional study with that
similarity in mind.
Ulrich & Bassler (1906, 158) reported G. gregaria from “Upper Carboniferous at Kansas City, Missouri” and (1906, 164) from
“Coal Measures, Kansas City, Missouri,” rocks that belong to the Missourian Stage. Echols & Creath (Micropaleontology, 5,
397, 1959) reported it from the Desmoinesian and Missourian stages. Here we extend the range to include rocks of the Virgilian
Stage in the Midcontinent of North America. The species lived in nearshore, brackish-water environments and is found in organi-
cally rich, terrigenous mudstones, especially those associated with coal beds. In this mode of life it was apparently similar to the
closely related G. arcuata (Bean) (Mag. nat. Hist., 9, 376, 377, fig. 55, 1836) as reported by Pollard (1966, 676, 677). True to its
name, G. gregaria typically occurs in great abundance on bedding planes of mudstone.
We thank Prof Larry W. Knox (Tennessee Technological University) and Dr Christopher P. Dewey (Mississippi State University)
for careful reviews of an early draft of the manuscript and Mr Jack Keim (University of Kansas) for photography.
Explanation of Plate 19, 70
Fig. 1, 9 RV, int. lat. (KUMIP 1,127,480, 1202 pm long). Fig. 2, 9 LV, int. lat. (KUMIP 1,127,479, 1140 /tin long). Fig. 3, A-2 instar
RV, int. lat. (KUMIP 1,127,488, 540 /mi long). Fig. 4, o- dors. (KUMIP 1,127,486, 11 18 /mi long).
Scale A (100 /an; x50), figs. 1, 2, 4; scale B (100 pm; xlOO), fig. 3.
Stereo-Atlas of Ostracod Shells 19, 68
Geisina gregaria (2 of 4)
Stereo-Atlas of Ostracod Shells 19, 70
Geisina gregaria (4 of 4)
Stereo-Atlas of Ostracod Shells 19 (16) 71-74 (1992) Richterina permiana (1 of 4)
595.339.11 (113.61) (789 : 162.107.32): 551.351 +552.54
ON RICHTERINA PERMIANA KOHN & DEWEY sp. nov.
by Peter Kohn & Christopher P. Dewey
(Mississippi State University, Mississippi, U.S.A.J
Holotype:
Type locality:
Derivation of name:
Figured specimens:
Richterina permiana sp. nov.
Dunn-Seiler Museum of Geology, Mississippi State University, no. 3341-6a; adult carapace.
[Paratypes: nos. 3341-6b & 6c; one adult carapace and a single valve].
N side of canyon wall, unnamed canyon, Sec. 30, T22S, R1E, Dona Ana County, Picacho
Mountain Quadrangle, New Mexico, U.S.A., lat. 32°21'51"N, long. 106°52'44"W. Upper part of
the Hueco Formation, Wolfcampian, Permian; 142.05 m above base of the measured section in
grey, fossiliferous, marine limestone.
After the Permian, being the only known Permian species of this genus.
Dunn-Seiler Museum of Geology, Mississippi State University, nos. 3341-6a (adult car.: PI. 19, 72,
figs. 1-3), 3341-6b (juv. car.: PI. 19, 74, figs. 1-4) and 3341-6c (juv. LV, PI. 19, 72, fig. 4). All
from the type locality; light grey fossiliferous limestone, N side of canyon wall; Hueco Formation,
Wolfcampian, Lower Permian.
Explanation of Plate 19, 72
Figs. 1-3, adult car. (holotype, 3341-6a, 0.50 mm long): fig. 1, LV ext. lat.; fig. 2, ext. dors.; fig. 3, ext. vent. Fig. 4 (paratype, 3341-6c,
0.50 mm): LV ext. lat.
Scale A (200 ^m; X110), figs. 1-4.
Stereo-Atlas of Ostracod Shells 19, 73
Richterina permiana (3 of 4)
Diagnosis:
Remarks:
Distribution:
A cknow/edgement:
Small, subovate, tumid carapace. Dorsal and ventral margins rounded. Hinge incised. Subequal
valves, overhang ventral margin. Anterior and posterior ends rounded, posterior end more tapered
than anterior, especially in juveniles. Nuchal furrow absent. Numerous, thin, anastomosing ridges
parallel to dorsal and ventral margins, converge at anterior and posterior ends near mid-height.
Smooth area in mid-lateral field, more pronounced in adults.
Richterina permiana differs from all other species assigned to this genus by virtue of its small size
and more tapered outline. Stratigraphically, the genus Richterina Gurich, 1896 hitherto extends
only into the lower Carboniferous (I. Wilkinson & N. Riley, in: R.C. Whatley & C. Maybury
[Eds.], Ostracoda & Global Events , Chapman & Hall, London, 161-172, 1990), which makes R.
permiana the youngest known representative of the genus. Entomozoaceans are typically thought
to have occurred as pelagic ostracods in “basinal” settings (M. Bless, Bull. Soc. belg. Geol., 92,
31-53, 1983; G. Becker & M. Bless, Ostracoda & Global Events, 421-436, 1990), although they are
known to occur in shelf settings (Bless, op. cit., 33). In contrast, Casier ( Revue Paleobiol., 6,
193-204, 1987 and Wilkinson & Riley (op. cit.) prefer to suggest a vagrant, nektobenthonic habit
for the entomozaceans, in dysaerobic habitats where sedimentation occurred below wave base. The
material from the Hueco Formation supports the hypothesis that entomozoaceans could occur in
shallow shelf settings.
U.S.A.; Hueco Formation, Wolfcampian Series, Lower Permian.
We acknowledge the financial support given by the Donors of the Petroleum Research Fund
administered by the American Chemical Society.
Explanation of Plate 19, 74
Fig. 1-4, juv. car. (paratype, 3341-6b, 0.32 mm long): fig. 1, LV ext. lat.; fig. 2, RV ext. lat.; fig. 3, ext. dors.; fig. 4, ext. vent.
Scale A (200 /;m; x 1 25), figs. 1-4.
Stereo-Atlas of Ostracod Shells 19, 74
Richterina permiana (4 of 4)
Stereo-Atlas of Ostracod Shells 19 (17) 75-78 (1992) Kuiperiana juglandica (1 of 4)
595.337.14 (118.21) (931 : 163.170.45): 551.35 + 552.54
ON KUIPERIANA JUGLANDICA AYRESS sp. nov.
by Michael A. Ayress
(The Australian National University, Canberra)
Kuiperiana juglandica sp. nov.
? 1986 Loxoconcha sp. 2 G. Ciampo, Boll. Soc. paleont. ital., 24(1), pi. 4, fig. 3.
Holotype:
Type locality:
Derivation of name:
Figured specimens:
Diagnosis:
Remarks:
Geology Museum, University of Otago, Dunedin, New Zealand, no. OU 40667; 9 LV.
All Day Bay, North Otago, New Zealand (lat. 45° 12'S, long. 170°53'E); Early Miocene Altonian Stage of the Rifle
Butts Formation. New Zealand fossil record file number J42/f 1 69.
From Latin juglans, a walnut; referring to its superficial resemblance.
Geology Museum, University of Otago, Dunedin, New Zealand, nos. OU 40666 (paratype, o' car.: PI. 19, 76, fig. 1),
OU 40667 (holotype, 9 LV: PI. 19, 76, fig. 2), OU 40668 (paratype, 9 RV: PI. 19, 76, fig. 3), OU 40669 (paratype, o*
car.: PI. 19, 76, fig. 4), OU 40665 (paratype. O' LV: PI. 19, 78, figs. 3, 4; text-fig. 1) all from the type locality, and OU
40672 (paratype, 9 RV: PI. 19, 78, fig. 1, 2) from Trig Z escarpment, Waitaki Valley, North Otago, New Zealand (lat.
44° 48.7' S, long. 1 70° 31.6' E); Early Miocene Waitakian Stage of the Otekaike Limestone.
A small species of Kuiperiana with a weak mid-dorsal sulcus, a curved ventrolateral ridge and dense reticulation, the
fossae of which are subrounded and diminish in size only slightly towards the valve periphery. Adductor muscle scars
large and subangular: upper median scar elongate subrectangular, the remainder subtriangular. Fulcral point deep and
situated below the anterior extension of the upper median adductor scar. Frontal scar large and “V”-shaped. Females
only slightly higher than males.
K. juglandica is very similar to Loxoconcha meridionalis Muller, 1908, from Antarctic waters, the type species of the
genus Myrena Neale (1967, Scient. Rep. Br. Antarct. Surv., 58, 19, pi. Ih, fig. 7) considered here (and by Maybury,
Stereo-Atlas Ostracod Shells, 17, 67, 1990) to be congeneric with Kuiperiana Bassiouni (1962, Roemeriana, 3, 62, fig. 3a,
Explanation of Plate 19, 76
Fig. 1, cr car., ext. post. (OU 40666, 370 pm long); fig. 2, 9 LV, ext. lat. (holotype, OU 40667, 360 pm long); fig. 3, 9 RV, ext. lat.
(OU 40668, 370 /tm long); fig. 4, O’ car., dors. (OU 40669, 370 pm long). Scale A (100 /mi; Xl60), figs. 1-4.
Stereo-Atlas of Ostracod Shells 19, 77 Kuiperiana juglandica (3 of 4)
pi. 7, figs. 1-4). Scanning electron photographs of specimens of M. meridionalis figured by Neale (kindly provided by J.
Whittaker of the BM (NH)) show that K. juglandica differs from that species in being smaller, in lacking a dorsal ridge, in
its smaller and more well rounded fossae, in its smooth solum (that of M. meridionalis is finely punctate) and in its slightly
larger muscle scar pattern. Kuiperiana lindsayi McKenzie, Reyment & Reyment (1991 , Revta esp. Paleont., 6(2), 152, pi.
IV, fig. 4, pi. V, fig. 10) from the Late Eocene of southeast Australia and deep waters of the S. W. Pacific (as Palmoconcha
sp. Ayress, 1988, unpubl. PhD thesis, UCW Aberystwyth, 699, pi. 25, figs. 22-24) is also somewhat similar, but in that
species the reticulation is rather subdued and the fossae are subdivided. Loxoconcha rolnickii Blaszyk (1987, Palaeont.
pol., 49, 72, pi. 15, fig. la-d) from the Oligocene of West Antarctica probably should also be assigned to Kuiperiana
although no internal details of that species are known. It differs from K. juglandica in having weak marginal ornament.
The taxonomic significance of the internal sub-central features of K. juglandica is not clear. The muscle scar pattern
is slightly larger and more irregular than in previous described species of Myrena but is very similar to certain species
of Palmoconcha, e.g. P. laevata (Norman) (Horne & Kilenyi, Stereo-Atlas Ostracod Shells, 8, 107-116, 1981, and
Horne & Whatley, ibid. , 12, 158, 1985). The fulcral point is a conspicuous feature close to and ahead of the median two
adductor scars consistent with both Palmoconcha and Myrena. This feature has yet to be examined in Kuiperiana.
Distribution: So far, has been found throughout the Oligocene, Whaingaroan Stage to Early Miocene, Altonian Stage of South
Island, New Zealand. A similar form possibly belonging to this species, differing only in having punctation towards the
valve periphery, occurs in the Late Eocene of New Zealand.
Text-fig. 1. Internal features observed in transmitted light,
a LV (OU 40665, 360 gm long).
Explanation of Plate 19, 78
Figs. 1, 2, 9 RV (OU 40672, 370/rm long): fig. 1, post, hinge; fig. 2, int. lat.; figs. 3, 4, cr LV (OU 40665, 360 pm long): fig. 3, int.
lat.; fig. 4, adductor muse. sc. Scale A (50/rm; x480) fig. 1; scale B (100 gm; x!50) figs. 2, 3; scale C (20 /rm; X600) fig. 4.
100 //m
Stereo-Atlas of Ostracod Shells 19, 78
Kuiperiana juglandica (4 of 4)
Stereo-Atlas of Ostracod Shells 19, 76
Kuiperiana juglandica (2 of 4)
Stereo-Atlas of Ostracod Shells 19 (18) 79-82 (1992) Gerodia ratina (1 of 4)
595.337.1 (113.51) (430 : 161 .01 1.50): 551.35 + 552.52
ON GERODIA RATINA (GRUNDEL)
by Gerhard Becker & Dieter Weyer
(University of Frankfurt & Kulturhistorisches Museum, Magdeburg, Germany)
GERODIA Grundel, 1962
Type-species (by original designation): Gerodia ratina Grundel, 1962
Diagnosis: Spinose, comparatively small and more or less inflated bairdiocypridid genus with subrectangular, subtrapezoidal
to subelliptical lateral outline and narrow apical region. Spines present only on smaller right valve; located
posteroventrally and at (or nearby) the anterior margin respectively. Doublure present and narrow. Adductor
muscle scar pattern unknown.
Distribution: Central and W Europe and N Africa; late Lower Devonian (upper Emsian) to early Lower Carboniferous (lower
Tournaisian).
Gerodia ratina Grundel, 1962
1961 Ostracoda D; J. Grundel, Freiberger-ForschHft. , Clll, 137, 138, pi. 13, figs. 3-5.
1962 Gerodia ratina sp. nov. J. Grundel, Freiberger-ForschHft., 051, 89, pi. 3, figs. 12, 13, pi. 4, figs. 1, 2.
1986 Gerodia ratina Grundel; K. Bartzsch & D. Weyer, Z. geol. Wiss., 14(2), pi. 3, fig. 17.
1987 Gerodia ratina Grundel; G. Becker, Palaeontographica , A200, 78, 79, pi. 6, fig. 4 (q.v. for full synonymy).
1991 Gerodia ratina Grundel; F. Lethiers & R. Feist, Geobios, 24, pi. 3, figs. 25-27 .
Holotype: Geological Institute, Bergakademie Freiberg, Saxony, Germany, no. 29/23; an adult, silicified carapace.
Explanation of Plate 19, 80
Fig. 1, adult car., dors. (SMF Xe 15163, 1010/rm long; tectonically shortened). Fig. 2, adult car., rt. lat. (SMF Xe 15164, 1070/rm long).
Fig. 3, adult car., vent. (SMF Xe 15165, 990 pm long; tectonically shortened).
Scale A (300 /tm; x50), figs. 1-3.
Stereo-Atlas of Ostracod Shells 19, 81 Gerodia ratina (3 of 4)
Type locality:
Figured specimens:
Diagnosis:
Remarks:
Distribution:
A ckn o wledgement:
Quarry “Pfaffenberg NE” near Obernitz village, 3 km SSE of Saalfeld, E Thiiringisches Schiefergebirge,
Germany; lat. 50°38'N, long. 11°24'E. Shales with nodules of cephalopod limestone; Gattendorfia- Stufe, lower
Tournaisian, Lower Carboniferous. Pelagic faces; ostracod fauna of Thuringian ecotype.
Forschungs-Institut Senckenberg, Frankfurt am Main (SMF), Germany, nos. SMF Xe 15163 (adult car.: PI. 19,
80, fig. 1), SMF Xe 15164 (adult car.: PI. 19, 80, fig. 2), SMF 15165 (adult car.: PI. 19, 80, fig. 3), SMF Xe 15166
(adult RV: PI. 19, 82, figs. 1, 2), SMF Xe 15167 (adult car.: PI. 19, 82, fig. 3), SMF 15168 (adult LV: PI. 19, 82,
fig. 4) and SMF 15169 (adult LV: PI. 19, 82, fig. 5).
All of the figured specimens are silicified material and are topotypes.
Moderately inflated Gerodia species with subtrapezoidal lateral outline. Both spines very large; anterior spine
located more or less below mid-height.
Gerodia ratina is characterized by the prominent, admarginal anterior spine located below mid-height. In G.
wocklumeriae Bartzsch & Weyer (Abh. Ber. Naturk. Vorgesch., 12(2), 47, text-figs. 7/1-4, 1980; do VI of Central
Europe) the spines are also prominent. However, in the latter species the anterior spine is located marginally, at
the anterior cardinal angle of the right valve. G. weyeri Grundel (Geologie, 21(7), 860, 1972; do VI of Central and
W Europe and N Africa) differs by its flange-like protuberances and its distinctly inflated carapace. The
prominent marginal rim known in the right valve of other Gerodia species is absent in G. ratina.
The Family Gerodiidae Grundel, 1962 was proposed for podocopids lacking bairdiid or rishonid lateral outlines
(Grundel, op. cit., 88, 1962); however (as known in other bairdiocypridids), the apical region is narrow and the
ventral overlap distinct. With respect to this overall carapace morphology, Becker ( Palaeontographica , 209, 164,
1989; Senckenberg. leth., 71, 1991) transferred Grtindel’s gerodiids to the Family Bairdiocyprididae Shaver, 1961
(Bairdiocypridacea, Podocopina, Podocopida). The comparatively distinct doublure in Gerodia resembles that of
bairdiids and is believed to be an apomorphic character of late Palaeozoic bairdiocypridids. The marginal spines
are considered to be merely biotope indicative features (for low-energy habitats).
Central Europe (Thuringia, Sauerland area), W Europe (Montagne Noire) and N Africa (Algeria). Gattendorfia-
Stufe, lower Tournaisian, Lower Carboniferous.
This paper forms part of D.F.G. project “Faunenvergleich Rhenoherzynikum/Saxothuringikum” no. 5.
Explanation of Plate 19, 82
Figs. 1, 2, adult RV (SMF Xe 15166, 1070/rm long): fig. 1, int. lat.; fig. 2, vent. Fig. 3, adult car., post. (SMF Xe 15167, 1100//m long).
Fig. 4, adult LV, vent. (SMF Xe 15168, 1120 pm long). Fig. 5, adult LV, int. lat. (SMF Xe 15169, 1140 pm long).
Scale A (300 /rm; x52), figs. 1, 3-5; scale B (300 ,um; x50), fig. 2.
I
Stereo-Atlas of Ostracod Shells 19 (19) 83-86 (1992) Rabienoscapha tergocornuta (1 of 4)
595.337.11 (113.45) (430: 161.08.50 + 011.50): 551.35 + 552.52
ON RABIENOSCAPHA TERGOCORNUTA BECKER
by Gerhard Becker & Dieter Weyer
(University of Frankfurt & Kulturhistorisches Museum, Magdeburg, Germany)
RABIENOSCAPHA Becker, 1989
Type-species (by original designation): Rabienoscapha tergocornuta Becker, 1989
Diagnosis: Beecherellid genus with bairdiid lateral outline and distinct antero- and posterodorsal spines only on larger
left valve.
Remarks: Rabienoscapha Becker, 1989 resembles Processobairdia Blumenstengel, 1965 in lateral outline and postero-
dorsal ornamentation. However, the overall morphology of the carapace (depression along the free margin)
and the peculiar spine at the anterior cardinal angle of the larger valve best relate to Acanthoscapha Ulrich
& Bassler, 1923 which clearly is a member of the Family Beecherellidae Ulrich, 1894.
Distribution: Central Europe, Rheinisches and E Thiiringisches Schiefergebirge; upper Famennian ( Clymenia —
Wocklumeria stages), Upper Devonian.
Rabienoscapha tergocornuta Becker, 1989
1986 Processobairdia ? sp. A: W. Buggisch, A. Rabien & G. Huhner, Geol. Jb. Hessen , 114, 27, 28, 54, tab. 3, text-fig. 6.
1987 Processobairdial sp. A; H. Groos-Uffenorde, Zentbl. Geol. Palaont., (2), 1987, 187.
1989 Rabienoscapha tergocornuta sp. nov. G. Becker, Geol. Jb. Hessen, 117, 10, 12, pi. 1, figs. 1-8.
Holotype: Hessisches Landesamt fur Bodenforschung, Wiesbaden, Germany; no. HLB 5216/1918, an adult left
valve (internal mould, 1918a and external mould, 1918b).
Explanation of Plate 19, 84
Fig. 1, adult car., rt. lat. (SMF Xe 15494, 1900 pm long). Fig. 2, adult car., post. (SMF Xe 15496, 1830/rm long). Fig. 3, juv. RV, ext.
lat. (SMF Xe 15495, 1390 long). Fig. 4, adult LV, ext. mould (paratype, HLB 5216/1918b, 1900 pm long). Fig. 5, adult LV,
int. lat. (SMF Xe 15497, 1830/rm long). Scale A (300 /tm; x32), figs. 1-3, 5; scale B (300 pm; x28), fig. 4.
Stereo-Atlas of Ostracod Shells 19, 85
Rabienoscapha tergocornuta (3 of 4)
Type locality:
Figured specimens:
Diagnosis:
Remarks:
Distribution:
Quarry “Beuerbach”, N of Oberscheld village at S slope of “Volpertseichen”, about 4 km ENE of
Dillenburg, Dill syncline, Rheinisches Schiefergebirge, Germany; lat. 50°45'N, long. 08°18'E. Grey,
yellowish weathering limestones; do V/do VI, upper-middle costatus conodont Zone, upper Famennian,
Upper Devonian. Ostracod fauna of Thuringian ecotype.
Forschungs-Institut Senckenberg (SMF), Frankfurt am Main, Germany, nos. SMF Xe 15494 (adult car.:
PI. 19, 84, fig. 1; PI. 19, 86, fig. 2), SMF Xe 15496 (adult car.: PI. 19, 84, fig. 2; PI. 19, 86, fig. 5), SMF
Xe 15495 (juv. rv: pi. 19, 84, fig. 3), SMF Xe 15497 (adult LV: PI. 19, 84, fig. 5), SMF Xe 15498 (juv.
LV: PI. 19, 86, fig. 1), SMF Xe 15499 (juv. LV: PL 19, 86, fig. 3), SMF Xe 15500 Uuv. LV: PI. 19, 86,
fig. 4) and SMF Xe 15501 (juv. RV: PI. 19, 86, fig. 6. Hessisches Landesamt fur Bodenforschung,
Wiesbaden (HLB), Germany, no. HLB 5216/1918b (paratype, ext. mould, adult LV, PL 19, 86, fig. 4).
The paratype external mould is from the type locality (quarry “Beuerback”; see Becker, op. cit., 10,
1989). All of the other figured specimens are silicified and have been obtained from the abandoned quarry
“Breternitz E”, in the valley plane of the Saale river, about 1 km NE of Breternitz village and 4 km SE
of Saalfeld, E Thiiringisches Schiefergebirge; lat. 50°38'N, long. 11°26'E. Shales with nodules of
cephalopod limestone; middle Wocklumeria Stage (boundary beds of upper subarmata/ lower paradoxa
zones), upper Famennian (do VI), Upper Devonian. Ostracod fauna of Thuringian ecotype.
Rabienoscapha species with very long and well developed spines; anterior spine directed forward,
posterodorsal spine curved backward. Lateral surface of valves has delicate, concentric riblets.
Becker {op. cit., 12, 1989) only described the larger, left valve of R. tergocornuta. Now, both valves (and
also carapaces) are known from the Thiiringisches Schiefergebirge; the smaller, right valve lacks spines. In
the silicified Thuringian specimens, however, the delicate surface ornamentation (known from external
moulds (see paratype, PL 19, 84, fig. 4) from the Beuerbach quarry) is not preserved.
As for the genus.
f
:i
I
II
Explanation of Plate 19, 86
Fig. 1, juv. LV, vent. (SMF Xe 15498, 1490 pm long). Fig. 2, adult car., dors. (SMF Xe 15494, 1900 pm long). Fig. 3, juv. LV, int.
lat. obi. (SMF Xe 15499, 1360 pm long). Fig. 4, juv. LV, ext. lat. (SMF Xe 15500, 1450 /mi long). Fig. 5, adult car., vent. (SMF Xe
15496, 1830 pm long). Fig. 6, juv. RV, vent. (SMF Xe 15501, 1330 pm long).
Scale A (300 pm\ x32), figs. 1-6.
I
f
Stereo-Atlas of Ostracod Shells 19, 84
Rabienoscapha tergocornuta (2 of 4)
Stereo-Atlas of Ostracod Shells 19, 86
Rabienoscapha tergocornuta (4 of 4)
Stereo-Atlas of Ostracod Shells 19 (20) 87-90 (1992) Processobairdia nodocerata (1 of 4)
595.337.11 (113.45) (430 : 161.011.50): 551.35 + 552.52
ON PROCESSOBAIRDIA NODOCERATA BLUMENSTENGEL
by Gerhard Becker & Horst Blumenstengel
(University of Frankfurt & Geological Survey, Halle, Germany)
Processobairdia nodocerata Blumenstengel, 1965
1965 Processobairdia nodocerata sp. nov. H. Blumenstengel, Freiberger ForschHft., C183, 37, tab. 6, pi. 10, figs. 14, 15, pi. 27, figs. 10-12.
1982 Processobairdia nodocerata Blumenstengel; G. Becker, Palaeontographica, A178, 118, 199, tab. 2, pi. 2, fig. 4 ( q.v . for full synonymy).
1985 Processobairdia nodocerata Blumenstengel; K. Bartzsch & D. Weyer, Freiberger ForschHft., C400, tab. 4, pi. 4, fig. 19.
1986 Processobairdia nodocerata Blumenstengel; K. Bartzsch & D. Weyer, Z. geol. Wiss., 14, pi. 3, fig. 24.
1986 Processobairdia nodocerata Blumenstengel; J.-J. Delvolve & F. Lethiers, C. r. hebd. Seanc. Acad. Sci. (ser. 2, no. 7), 302, 495.
1987 Processobairdia nodocerata Blumenstengel; G. Becker, Palaeontographica, A200, 81, tab. 1, pi. 4, fig. 12.
1987 Processobairdia nodocerata Blumenstengel; F. Lethiers & S. Crasquin, Bull. Soc. geol. Fr. (8), 3, pi. 1, fig. 12.
Holotype: Geological Institute, Bergakademie Freiberg, Saxony, Germany; an unnumbered, silificied, adult right valve.
Type locality: Former roof slate mine “Blaues Gliick” (abandoned underground gallery), 2 km S of Leutenberg, about 13 km
SSE of Saalfeld, E Thiiringisches Schiefergebirge, Germany; lat. 50°33'N, long. 11°29'E. Shales with limestone
nodules, upper do V, upper Famennian, Upper Devonian. Ostracod fauna of Thuringian ecotype.
Figured specimens: Forschungs-Institut Senckenberg (SMF), Frankfurt am Main, Germany, nos. SMF Xe 15484 (adult RV: PI. 19,
88, fig. 1), SMF Xe 15485 (juv. RV: PI. 19, 88, figs. 2, 4), SMF Xe 15486 (adult LV: PI. 19, 88, fig. 3), SMF Xe
15487 (adult LV: PI. 19, 88, figs. 5, 6), SMF Xe 15488 (adult car.: PI. 19, 90, fig. 1), SMF Xe 15489 (adult LV:
PI. 19, 90, fig. 2), SMF Xe 15490 (juv. RV: PI. 19, 90, fig. 3), SMF Xe 15491 (adult RV: PI. 19, 90, fig. 4),
SMF Xe 15492 (adult car.: PI. 19, 90, fig. 5) and SMF Xe 15493 (adult LV: PI. 19, 90, fig. 6).
Explanation of Plate 19, 88
Fig. 1, adult RV, ext. lat. (SMF Xe 15484, 1470 //m long). Figs. 2, 4, juv. RV (SMF Xe 15485, 1390 pm long): fig. 2, int. lat.; fig. 4,
post. Fig. 3, adult LV, ext. lat. (SMF Xe 15486, 1610/tm long). Figs. 5, 6, adult LV (SMF Xe 15487, 1640 pm long): fig. 5, int. lat.;
fig. 6, obi. int. lat.
Scale A (300 gm; x36), figs. 1, 3-6; scale B (300 /rm; x30), fig. 2.
Stereo-Atlas of Ostracod Shells 19, 89 Processobairdia nodocerata (3 of 4)
All of the figured specimens are silicified and are from the small, abandoned quarry “Hoher Schu(3”,
Rotenbach valley, 450 m NNW of Reschwitz village, about 5 km S of Saalfeld, E. Thiiringisches Schiefergebirge;
lat. 50°38'N, long. 11°21'E. Thin layer of shales with limestone nodules within quartzitic sandstones of
“Hauptquarzit” horizon, Clymenia Stage (do V), upper Famennian, Upper Devonian. Ostracod fauna of
Thuringian ecotype.
Diagnosis: Processobairdia species with very long, well developed posterodorsal spine and approximately anterodorsally
located knob on each valve; knob more distinct on right than left valve. Marginal rim present and more developed
in larger left valve than in smaller right valve. Antero- and posteroventrally denticulate. Carapace surface with
minute, regularly scattered pits.
Remarks: Processobairdia nodocerata is characterized by its distinctive, symmetrically arranged ornamentation. The
type-species of Processobairdia Blumenstengel, 1965, P. posterocerata (do 11113-do V), has much weaker
posterodorsally located spines. Moreover, the distinct and denticulate marginal structure known from P.
nodocerata is not developed in the type species and the lateral outline of its valves is less elongate.
Griindel ( Neues Jb. Geol. Palaont. Mh., 1965, 6, 354, 1965) established the Tribe Processobairdiini
[ = Subfamily Processobairdiinae sensu Schallreuter, 1979 (Proceedings of the International Symposium on
Ostracodes, Beograd, 27, 1979)] for bairdiids with “peculiarly specialized sculptures”, i.e. with dorsal spines.
These features, believed to be distinctive for the genus Processobairdia are, however, considered to be merely
biotope indicative (for low-energy environments) and, therefore, lack suprageneric significance. Marginal
structures (rims, ridges, denticules), also known in “smooth” Bairdia, are taxonomically relevant only at the
species level.
Distribution: Central Europe (E Thiiringisches Schiefergebirge), W Europe (W Pyrenees, S Cantabrian Mountains), N Africa
(Morocco); upper Famennian, Upper Devonian; Clymenia Stage — upper paradoxa Zone of Wocklumeria Stage
(do V-do VI).
Explanation of Plate 19, 90
Fig. 1, adult car., vent. (SMF Xe 15488, 1450/rm long). Fig. 2, adult LV, vent. (SMF Xe 15489, 1420 pm long). Fig. 3, juv. LV, ext.
lat. (SMF Xe 15490, 1090 //m long). Fig. 4, adult RV, int. lat. (SMF Xe 15491, 1530 pm long). Fig. 5, adult car. dors. (SMF Xe 14592,
1470/zm long). Fig. 6, adult LV, vent. (SMF Xe 15493, 1500 pm long).
Scale A (300 /rm; x36), figs. 1-6.
Stereo-Atlas of Ostracod Shells 19 (21) 91-94 (1992) Arcacythere aurani (1 of 4)
595.337.14 (116.333.3) (691 : 163.046.17): 551.35 + 552.54
ON ARCACYTHERE AURANI BABINOT & COLIN sp. nov.
by Jean-Franfois Babinot & Jean-Paul Colin
(Universite de Provence, Marseille & Esso Rep, Begles, France)
Holotype :
Type locality:
Derivation of name:
Figured specimens:
Arcacythere aurani sp. nov.
Centre de Sedimentologie-Paleontologie, Universite de Provence, Centre Saint-Charles, Marseille, no.
HMA 1, o* carapace.
[Paratypes: nos. PMA 1-7; five carapaces and two valves].
Grey marls of Berivotra, SE of Majunga, NW Malagasy Republic (approx, lat. 16° 10' S, long. 46° 35' E),
with planktonic foraminifera, calcareous nannofossils. Middle Maastrichtian, Gansseri Zone.
In honour of Prof Auran Randrianasolo (Pointe-a-Pitre, Guadelupe) in recognition for his extensive
researches on Middle and Late Cretaceous microfaunas of the Malagasy Republic.
Centre de Sedimentologie-Paleontologie, Universite de Provence, Centre Saint-Charles, Marseille, coll,
nos. PMA 1/1 (paratype, o’ car.: PI. 19, 92, fig. 1), PMA 1/2 (paratype, 9 car.: PI. 19, 92, fig. 2), HMA
1 (holotype, o * car.: PI. 19, 92, fig. 3), PMA 1/3 (paratype, 9 car.: PI. 19, 92, fig. 4), PMA 1/4
(paratype, 9 LV: PI. 19, 94, fig. 1), PMA 1/5 (paratype, O’ RV: PI. 19, 94, fig. 2), PMA 1/6 (paratype,
o’ cr.: PI. 19, 94, fig. 3), PMA 1/7 (paratype, 9 car.: PI. 19, 94, fig. 4). All from the type locality and
horizon, sample Q19.07 (Randrianasolo, A., Etude stratigraphique et micropaleontologique des bassins
sedimentaires malgaches situes au Nord de la Bestiboka, de TAlbien moyen a la limite Cretace-Tertiaire,
Thesis Univ. Provence, Marseille, 1986).
Explanation of Plate 19, 92
Fig. 1, cr car., ext. I. lat. (paratype, PMA 1/1, 505 /^m long); fig. 2, 9 car., ext. I. lat. (paratype, PMA 1/2, 516/rm long); fig. 3, cr
car., ext. rt. lat. (holotype, HMA 1, 483 gm long); fig. 4, o* car., ext. I. lat. (paratype, PMA 1/3, 500 /urn long).
Scale A (100 nm; xl20), figs. 1-4.
Stereo-Atlas of Ostracod Shells 19, 93
Arcacythere aurani (3 of 4)
Diagnosis:
Remarks:
Distribution:
A ckn o wledgemen ts:
Small, elongate, subrectangular species of Arcacythere Hornibrook, 1952. Anterior margin obliquely
rounded, acute at the ventral level. Posterior margin truncated, spinose, straight, with a distinct dorsal
quadrate angle, especially marked in the females. Dorsal and ventral margins nearly straight, slightly
ventrally concave on the right valve. Very robust and variable reticulation with vertical and horizontal
ribs and large subcircular to elongate fossae; strong posterior vertical depression; ribs essentially smooth.
Left valve strongly overlapping the right valve. Hinge amphidont, straight, with smooth small distal
tooth and a smooth median element. Anterior marginal zone very broad. Other internal features not
observed. Pronounced sexual dimorphism with females much larger than males.
The genus Arcacythere Hornibrook ( Palaeont . Bull. Wellington, 18, 31, 1952) was originally restricted
to the single species A. chapmani Hornibrook, 1952, known from the late Cretaceous to Middle Miocene
in New Zealand. Recently, Ayress (/. micropalaeontol., 10, 223-226, 1991) demonstrated that the genus
Rockallia Whatley, Frame & Whittaker ( Stereo-Atlas Ostracod Shells, 5, 137-144, 1978), known from
deep-sea sediments worldwide and from the Oligo-Miocene of northwestern Europe, was a junior
synonym of Arcacythere. The presence of the genus Arcacythere reported for the first time in the Late
Cretaceous of the Malagasy Republic and also known from the Late Cretaceous (Piripouan stage,
Campanian) of New Zealand (Hornibrook, 1952, op. cit.) indicates that the Family Rockallidae Whatley,
Uffenorde, Harlow, Downing & Kesler (7. micropalaeontol., 1, 1-11, 1982), originated in the Austral
domaine. A. aurani sp. nov. differs from the type-species, A. chapmani, essentially by its coarser
reticulation and the presence of a ventral expansion of the anterior margin.
In addition to the type locality, Arcacythere aurani sp. nov. has been found in levels of the same age from
the Mahafanina-Antanafantatra region (Majunga Basin, Malagasy Republic).
We sincerely thank Dr A. Randrianasolo (Pointe-a-Pitre, Guadelupe) for giving us the material to
study.
Explanation of Plate 19, 94
Fig. 1, 9 LV, int. lat. (PMA 1/4, 508 /rm long); fig. 2, o’ RV, int. lat. (paratype, PMA 1/5, 487 nm long); fig. 3, O’ car., ext. dors.
(PMA 1/6, 450 /urn long); fig. 4, 9 car., ext. vent. (PMA 1/7, 483 /ym long).
Scale A (100 //m; xl20), figs. 1-4.
Stereo-Atlas of Ostracod Shells 19, 92 Arcacythere aurani (2 of 4)
Stereo-Atlas of Ostracod Shells 19 (22) 95-98 (1992) Kindlella melnyki (1 of 4)
595.336.14 (113.61) (789 : 162. 108.32): 551.351 + 552.52
ON KINDLELLA MELNYKI DEWEY & KOHN sp. nov.
by Christopher P. Dewey & Peter Kohn
(Mississippi State University, Mississippi, U.S.A.)
Kindlella melnyki sp. nov.
1988 Kindlella sp. aff. K. fissiloba I.G. Sohn; D.H. Melnyk & R.F. Maddocks, Micropaleontology , 34, 37, pi. 2, fig. 17.
Holotype:
Type locality:
Derivation of name:
Figured specimens:
Dunn-Seiler Museum of Geology, Mississippi State University, no. 3341-8a; adult carapace.
[Paratypes: nos. 3341-8b, 8c & 8d; one adult carapace, one juvenile carapace and a left valve].
Apache Canyon, Sec. 36, T22S, R1W, Picacho Mountain Quadrangle, New Mexico, U.S.A., lat.
32°20'59"N, long. 107° 53' 16" W. Upper part of the Hueco Formation, Wolfcampian, Permian;
0.7 m above base of the measured section at the W end of the S side of Apache Canyon, in tan
fossiliferous shale; marine.
The Apache Canyon section is in three parts, so that the type horizon for K. melnyki is situated
6.25 m above the exposed base of the correlated section.
After David Melnyk, who first recognised the species in the Permian of Texas.
Dunn-Seiler Museum of Geology, Mississippi State University, nos. 3341-8a (adult car.: PI. 19, 96,
figs. 1-4), 3341-8b (adult car.: PI. 19, 98, fig. 1), 3341-8c (juv. car., PI. 19, 98, figs. 2-4) and
3341-8d (adult LV: PI. 19, 98, fig. 5). All from tan fossiliferous shale at the type locality.
Explanation of Plate 19, 96
Figs. 1-4, adult car. (holotype, 3341-8a, 0.75 mm long): fig. 1, RV ext. lat.; fig. 2, LV ext. lat.; fig. 3, ext. vent. fig. 4, ext. dors.
Scale A (250^/m; x75), figs. 1-4.
Stereo-Atlas of Ostracod Shells 19, 97
Kindlella melnyki (3 of 4)
Diagnosis:
Remarks:
Distribution:
A ckn o wledgemen t:
Small, elongate, subquadrate carapace. Dorsal margin straight, cardinal angles slightly obtuse.
Two dorsal lobes protrude above hinge on each valve. Posterior lobe larger than anterior lobe.
Lobes dorsoposteriorly directed, merge ventrally with valve surface. Anterior and posterior ends
broadly rounded, posterior end with slight ventral swing. Maximum height anterior of midlength.
Lateral surface of valves covered by coarse, thick walled reticulation. Smooth, subcentral,
kirkbyan spot just below midheight and posterior to midlength. Thick, inner carina extends from
cardinal angles subparallel to entire free margin. Inner carina separated from outer carina by single
row of reticulations. Reticulation fades near anterior cardinal angle. External edge of free margin
smooth. Ventral margin medially concave in lateral aspect. Valves subequal, with right valve
rabetted around free margin to receive left valve. Hinge straight, tongue and groove with slight
thickening at cardinal ends.
K. bituberculata (M’Coy, 1844), from the Carboniferous of Scotland and Ireland (T.R. Jones &
J. Kirkby, Scient. Trans. R. Dubl. Soc., (2), 6, 173-205, 1896; M.A. Latham, Trans. R. Soc.
Edinb., 57, 352-395, 1933; E. Robinson, Geol. J., Special Issue 8, 121-166, 1978), has a more
quadrate outline, less pronounced lobation and finer meshed reticulation pattern than K. melnyki.
Both K. fissiloba Sohn, 1954 and K. centrinoda Sohn, 1954, from the Permian of Texas (I.G.
Sohn, Prof. Pap. U.S. geol. Surv., 264A, 1-24, pis. 1-5, 1954), exhibit distinctive subdivisions of
the anterior lobe, whereas the anterior lobe of K. melnyki is unmodified.
The distribution of K. melnyki in the Hueco Formation of New Mexico supports the assertion
that this species normally occupied nearshore marine or lagoonal habitats and was tolerant of
terrigenous substrates (Melnyk & Maddocks, op. cit.).
U.S. A.; Hueco Formation, Wolfcampian Series, Lower Permian.
We acknowledge the financial support given by the Donors of the Petroleum Research Fund
administered by the American Chemical Society.
Explanation of Plate 19, 98
Fig. 1, adult car. (paratype, 3341-8b, 0.78 mm long): RV ext. lat. Figs. 2-4, juv. car. (partype, 3341-8c, 0.66 mm long): fig. 2, RV ext.
lat.; fig. 3, ext. dors.; fig. 4, ext. vent. Fig. 5, adult LV (paratype, 3341-8d, 0.77 mm): int. lat.
Scale A (250/im; x75), figs. 1-5.
Stereo-Atlas of Ostracod Shells 19, 96
Kindlella melnyki (2 of 4)
Kindlella melnyki (4 of 4)
Stereo-Atlas of Ostracod Shells 19, 98
Stereo-Atlas of Ostracod Shells 19 (23) 99-102 (1992) Anchistrocheles eximia (1 of 4)
595.337.11 (116.333.3) (430 : 161 .013.54): 551.35 + 552.55
ON ANCHISTROCHELES EXIMIA HERRIG sp. nov.
by Ekkehard Herrig
(University of Greifswald, Germany)
Anchistrocheles eximia sp. nov.
Ho/otype:
Type locality:
Derivation of name:
Figured specimens:
Diagnosis:
Fachrichtung Geowissenschaften, Ernst-Moritz-Arndt-Universitat Greifswald, coll. no. 29591/
12D; LV.
Flint erratic boulder, GroB-Kedingshagen, near Stralsund, NE Germany (lat. 54°20'N, long.
13°02'E); Upper Maastrichtian (Upper Cretaceous).
Latin eximius, extraordinary; alluding to shape of valves in external and internal view.
Fachrichtung Geowissenschaften, University of Greifswald, no. 29591/12D (holotype, LV: PI. 19,
100, figs. 1-3; PI. 19, 102, figs. 1-3), erratic boulder from GroB-Kedingshagen, near Stralsund.
Large species of Anchistrocheles with anteriorly and posteroventrally compressed shell; spinose
anterior margin; duplicature wide, extending nearly to middle of dorsal margin anteriorly and
posteriorly; inner shell surface in central region with a U-like (dorsally open) crest surrounding the
muscle scar field ventrally.
Explanation of Plate 19, 100
Figs. 1-3, LV (holotype, no. 29591/12D, 670 am long): fig. 1, int. lat.; fig. 2, dors.; fig. 3, ext. lat.
Scale A (100 /rm; X100), figs. 1-3.
Stereo-Atlas of Ostracod Shells 19, 101 Anchistrocheles eximia (3 of 4)
Remarks: A. eximia is a rare and the largest hitherto known species of the genus in the Upper Cretaceous (see
Herrig, E., Z. geol. Wiss., Schriftenreihe, Berlin (in press)). It is distinguished from other species
by its anteriorly and posteroventrally strongly compressed shell (behind the anterior compressed
area the valves abruptly become inflated along a straight vertical (dorsal-ventral) line) and by the
valve interiors with their wide inner lamellae extending antero- and posterodorsally nearly to the
middle of the dorsal margin. In Upper Cretaceous ostracods, this kind of duplicature is otherwise
only known in some species of the genus Krithe. Inner margin and line of concrescence coincide
except anteriorly, forming a narrow vestibulum. Another striking feature of the inner shell surface
is a distinctive U-like crest, dorsally open, surrounding the muscle scar field ventrally. Marginal
pore-canals are numerous, expecially in the anterior part of the inner lamella, and straight.
Distribution: Only known from Quaternary erratic boulders of siliceous chalk, Upper Maastrichtian (Upper
Cretaceous). The region of its possible provenance is Southern Sweden and/or the middle to
eastern Baltic Sea.
Explanation of Plate 19, 102
Figs. 1-3 (holotype, no. 29591/12D, 670 /im long): fig. 1, LV, int. lat., detail of muscle scars and U-like crest; fig. 2, RV, int. lat., detail
of hinge; fig. 3, RV, int. lat.
Scale A (100 fum; x250), figs. 1, 2; scale B (100 ^m; xlOO), fig. 3.
Anchistrocheles eximia (4 of 4)
Stereo-Atlas of Ostracod Shells 19, 100
Anchistrocheles eximia (2 of 4)
Stereo-Atlas of Ostracod Shells 19, 102
Stereo-Atlas of Ostracod Shells 19 (24) 103-106 (1992) Jonesia marecorallinensis (1 of 4)
595.337.14 (119.1) (265.7 : 163.146.17): 551.352
ON JONESIA MARECORALLINENSIS CORREGE sp. nov.
by Thierry Correge
(The Australian National University, Canberra)
Jonesia marecorallinensis sp. nov.
National Museum of Victoria (Melbourne, Australia) no. NMVP197923; RV.
[Paratype NMVP197922; LV],
Western Coral Sea. ODP Leg 133, site 822. Present day water depth 955 m. Lat. 16°25.379'S,
long. 146° 12.904'E. Late Pleistocene calcareous ooze.
Latin, referring to the occurrence of this species in the Coral Sea.
National Museum of Victoria (Melbourne, Australia) nos. NMVP197923 (holotype, RV: PI. 19,
104, figs. 1-5; PI. 19, 106, figs. 2, 5), NMVP197922 (paratype, LV: PI. 19, 106, figs. 1, 3, 4). Both
from the type locality, the holotype from section 02/01/60-60 cm, the paratype from section
02/03/1 10-1 12 cm.
A large species of Jonesia characterized by a pronounced dorsal inflation which overreaches the
dorsal margin, tapering ventrally. The carapace is heart-shaped in end view. Three dorsal muscle
scars prominent submedianly corresponding externally with a shallow depression. Fine striations
on the dorsal external surface. Caudal process dorsally situated. Internal rib well developed. L/H
ratio approximately 2.4.
Holotype:
Type locality:
Derivation of name:
Figured specimens:
Diagnosis:
Explanation of Plate 19, 104
Figs. 1-5, RV (holotype, NMVP197923, 970/^m long): fig. 1, ext. lat.; fig. 2, int. lat. flat showing inflation; fig. 3, int. oblique vent.;
fig. 4, post.; fig. 5, int. oblique vent.
Scale A (100 //m; x60), figs. 1-3, 5; scale B (100 um\ x90), fig. 4.
Stereo-Atlas of Ostracod Shells 19, 105 Jonesia marecorallinensis (3 of 4)
Remarks:
Distribution:
A cknowledgements:
The internal rib seen in this species is diagnostic of Baltraella, but I follow Schornikov ( Ostracods
of the family Bythocytheridae from Far Eastern Seas, 99, Moscow: Akademiya Nauk SSSR, 1981
[In Russian]) who synonymises Baltraella with Jonesia. J. marecorallinensis differs from B.
baltraensis Pokorny, 1968 ( Cas . Miner. Geol., 13, 385-390, text-figs. 1-4) and from J. cuneata
Schornikov, 1981 {op. cit., 101, text-fig. 31B) in its pyriform outline and dorsal inflation. The two
species described by Keij {Proc. K. ned. Akad. Wet., ser. B, 82, 33-44, 1979) are much smaller and
do not have the characteristic inflation of J. marecorallinensis.
J. marecorallinensis is the first species within the Jonesia/Baltrae/la group described from the
bathyal environment. The possibility of downslope transport is unlikely because of the fragility of
the shell. In addition, a study of ostracods from the Australian continental shelf (Labutis,
Cytheracean Ostracoda from the Great Barrier Reef , unpubl. Thesis, Macquarie University, 1977)
found several species of Baltraella {ibid., 52 & 53) but failed to encounter J. marecorallinensis.
So far, this species has been found only in Late Pleistocene calcareous ooze from the Western
Coral Sea, at a water depth of 955 m.
I would like to thank Michael Ayress and Patrick De Deckker (Geology Dept., ANU) for useful
taxonomic discussions and comments to improve the manuscript. Robin Whatley is acknowledged
for his review of the manuscript. The Electron Microscope Unit (EMU) at ANU is gratefully
acknowledged for access to their SEM and for expert help.
Explanation of Plate 19, 106
Figs. 1, 3, 4, LV (paratype, NMVP197922, 910//m long): fig. 1, ext. lat.; fig. 3, int. lat.; fig. 4, detail of dors, muscle scars; figs. 2 &
5, RV (holotype, NMVP197923, 970 //m long): fig. 2, dors.; fig. 5, detail of muscle scars.
Scale A (100 //m; x55), figs. 1-3; scale B (10/rm; x300), figs. 4, 5.
Stereo- Atlas of Ostracod Shells 19, 104
Jonesia marecorallinensis (2 of 4)
Stereo-Atlas of Ostracod Shells 19, 106
Jonesia marecorallinensis (4 of 4)
Stereo-Atlas of Ostracod Shells 19 (25) 107-110 (1992) Swainocythere nanseni (1 of 4)
595.337.14 (119.9) (265.7 : 163.145.43 + 163.153.30): 551.352 (26.03)
ON SWAINOCYTHERE NANSENI (JOY & CLARK)
by Thierry Correge, Michael A. Ayress & Victoria Drapala
(The Australian National University , Canberra)
Swainocythere nanseni (Joy & Clark, 1981)
1977 Cytheropteron? nealei n. sp., J.A. Joy & D.L. Clark, Micropalaeontology , 23, 141, pi. 1, figs. 8-11 [non “Cytheropteron” nealei
S.P. Jain [Bull. Indian Geologists Ass., 8, 54, 1975)].
1981 Cytheropteron nanseni nom. nov., J.A. Joy & D.L. Clark, J. Paleont., 55, 1108.
Holotype:
Type locality:
Figured specimens:
Diagnosis:
Department of Geology & Geophysics, University of Wisconsin, Madigan, Wisconsin, UW 1597-8b; RV.
Core FI 423, 16-1, Alpha Cordillera, central Arctic Ocean. Lat. 84°55.72'S, long. 126°43.37'E, water
depth 1532 m; Recent.
National Museum of Victoria (Melbourne, Australia) no. NMVP197924 (o' RV: PI. 19, 108, fig. 1; PI.
19, 1 10, figs. 4, 5) from western Coral Sea; top 1 cm of core FR 590/29; present day water depth 1834 m;
lat. 15°42.3'S, long. 145°59.6'E. NMVP197925 (o’ LV: PI. 19, 108, fig. 2; PI. 19, 110, figs. 1-3), same
locality. NMVP197926 (9 LV: PI. 19, 108, figs. 3, 4) from Tasman Sea, BMR core 71 GC 044-45 cm; lat.
29° 30.90'S, long. 153° 54.79' E; present day water depth 1298 m. (Note: specimens NMVP197924 and
NMVP197925 are disarticulated valves from the same carapace.)
Carapace small, subtriangular in lateral outline, with well-developed ventral caudal process. Coarse
punctation covering the median surface of the carapace, weakly aligned subhorizontally. Very fine
punctation near the anterior margin. Rest of carapace is smooth. Sexual dimorphism apparent; male
more elongate than female.
Explanation of Plate 19, 108
Fig. 1, O' RV, ext. lat. (NMVP197924, 310/rm long); fig. 2, O' LV, ext lat. (NMVP197925, 310/rm long); figs. 3 & 4, 9 LV
(NMVP197926, 250^m long): fig. 3, dors.; fig. 4, camera lucida drawing ext. lat.
Scale A (100 pm; x 190), figs. 1, 4; scale B (100 pm; x220), figs. 2, 3.
Stereo-Atlas of Ostracod Shells 19, 109 Swainocythere nanseni (3 of 4)
Remarks: Whatley (lit. comm., 1992) pointed out to us that with respect to its shape and outline this species
resembles Paijenborchella Kingma, 1948 and Gibboborchella Grundel, 1976, but differs from those
genera in its internal features. We prefer to assign this species to Swainocythere Ishizaki, 1981 based on
its identical internal features and external features, including the conspicuous mid-anterior inflation
corresponding to the anterior vestibule characteristic of the genus. 5. nanseni differs from Swainocythere
chejudoensis Ishizaki, 1981 ( Sci . Rep. Tohoku Univ., 51, 1-2, 61), from the outer shelf of the East China
Sea, in its punctation confined subcentrally, its more pronounced ventral caudal process, and in its more
weakly denticulate median hinge element. S. nanseni substantiates the previously monotypic genus. Two
other, as yet undescribed, deep sea species from the southwest Pacific and Arctic waters also belong to
the genus. These latter species differ from S. nanseni mainly in having strong reticulation. Joy & Clark’s
illustrations (1977, op. cit., 149, pi. 1, figs. 8-10) do show some slight differences from our material
including slightly more extensive surface punctation and a greater length to height ratio, but can be
accounted for by geographical variation. Specimens from Arctic waters identical to ours illustrated here
have recently been shown to us by Briggs, which supports the species identification of our material and
indicates the wide distribution of this species.
Distribution: Joy & Clark’s (1977, op. cit.) core top material, from the Chukchi Rise and Alpha Cordillera regions of
the central Arctic Ocean, ranges in waterdepth between 1351 to 2810 m. We found this species in a
number of core locations around Australia, in the SW Pacific and SE Indian oceans of Late Pleistocene
to Recent age. The bathymetric distribution ranges from 950 to 2793 m. Briggs’ (lit. comm. 1992)
material from Arctic waters (sub-fossil core material from Axel Fteiberg Island slope) ranges between
1150 and 1533 m.
Acknowledgements: We would like to thank the Electron Microscope Unit (EMU) at ANU for access to their SEM and for
expert help. We gratefully acknowledge Dr David Johnson (James Cook University, Townsville) for
access to core FR 590/29.
Explanation of Plate 19, 110
Figs. 1-3, O' LV (NMVP197925, 310/rm long): fig. 1, detail of hinge; fig. 2, int. lat.; fig. 3, detail of muscle scars; figs. 4-5, cr RV
(NMVP197924, 310/rm long): fig. 4, detail of hinge; fig. 5, int. lat.
Scale A (lO/zm; x900), figs. 1, 4; scale B (100 pm\ Xl75), figs. 2, 5; scale C (10/rm; xlOOO), fig. 3.
Stereo- Atlas of Ostracod Shells 19, 110
Swainocythere nanseni (4 of 4)
Stereo-Atlas of Ostracod Shells 19, 108
Swainocythere nanseni (2 of 4)
Stereo-Atlas of Ostracod Shells 19 (26) 111-114 (1992) Rectella siveteri (1 of 4)
595.337.21 (113.331) (420: 162.003.52): 551.351 +552.52
ON RECTELLA SIVETERI PETERSEN & LUNDIN sp. nov.
by Lee E. Petersen & Robert F. Lundin
(Anadarko Petroleum Corporation, Houston, Texas & Arizona State University, Tempe, U.S.A.)
Rectella siveteri sp. nov.
1991 Rectella sp. nov. R.F. Lundin, L.E. Petersen & D.J. Siveter, J. micropalaeontol., 9 (pt. 2 for 1990), pi. 2, fig. 6.
Holotype:
Type locality:
Derivation of name:
Figured specimens:
Diagnosis:
Department of Geology, Arizona State University (ASU) no. ASU X-139; carapace.
Benthall Edge, S bank of River Severn, opposite Coalbrookdale valley and c. 700 m W of bridge at Ironbridge,
Shropshire, England (National Grid Reference, SJ 6657 0359); approximately lat. 52°37'N, long. 2°29'W.
Apedale Member, Coalbrookdale Formation, Homerian Stage, Wenlock Series, Silurian.
In honour of Dr David J. Siveter of the University of Leicester; in recognition of his long and tireless work on
Silurian ostracods of the Welsh Borderland area.
Department of Geology, Arizona State University (ASU), nos. X-139 (holotype, car.: PI. 19, 112, figs. 1-4),
X-205 (paratype, car.: PI. 19, 112, fig. 5), X-206 (paratype, car.: PI. 19, 114, figs. 1, 2), X-207 (paratype, car.:
PI. 19, 114, figs. 3, 4), X-208 (paratype, car.: PI. 19, 114, fig. 5).
ASU X-139, X-205, X-206 and X-207 are from the type locality. ASU X-208 is from the Farley Member of
the Coalbrookdale Formation below the east end of Benthall Edge, Shropshire; approximately lat. 52°37'N,
long. 2°29'W; Homerian Stage, Wenlock Series, Silurian.
Rectella species with one tubercle at the posteroventral lateroadmarginal bend of the right valve and in the
equivalent position of the left valve of some specimens. Dorsal outline ovate to cuneate but in all cases the
posterolateral surface is compressed (flattened). Surface smooth but in a few specimens weakly granulose and on
some specimens weakly reticulate on the posterolateral part. Ventral commissure straight (ventriculus absent).
Explanation of Plate 19, 112
Figs. 1-4, car. (holotype, ASU X-139, 940 pm long): fig. 1, ext. It. lat.; fig. 2, ext. rt. lat.; fig. 3, ext. dors.; fig. 4, ext. vent. Fig. 5,
car. (paratype, ASU X-205, 827 /um long): ext. vent. Scale A (200 /rm; x54), figs. 1-4; scale B (200 pm; x62), fig. 5.
Stereo-Atlas of Ostracod Shells 19, 113
Rectella siveteri (3 of 4)
Remarks:
Distribution:
A cknowledgemen ts:
The development of the posteroventral tubercle is variable, being almost spinelike on some specimens whereas
on others it is little more than a low rounded swelling. R. siveteri is most similar to R. longa Nyetskaya, 1958
( Trudy vses. nauchno-issled. geol. Inst., 9) from which it can be distinguished by its larger size, its greater H : L
ratio and by its more quadrate lateral outline. R. longa is poorly known but several specimens of it in our
collection indicate that the anterodorsal border is distinctly truncate compared to that of R. siveteri.
The species described here fits the presently used concept of Rectella. The type-species, R. inaequalis
(Nyetskaya, 1952) ( Trudy vses. nauchno-issled. geol. Inst., 5), however, is poorly understood, particularly with
regard to the contact margin, hinge and other interior features. Nevertheless, published illustrations of
Ordovician species placed in Rectella suggest that there are differences between them and Silurian species which
have been placed in the genus. Restudy of the type-species of Rectella possibly will result in removal of the
species described here from the genus. The material for R. siveteri consists of approximately 170 carapaces.
Accordingly, interior features are not known for this species.
Known from late Llandovery to late Wenlock (middle Homerian) strata of Britain (Lundin et al., 1991).
We gratefully acknowledge support from NATO (Grant No. 870445) and the College of Liberal Arts and
Sciences, Arizona State University.
Text-fig. 1, Scatter diagram for 35 carapaces (sample RFL 28)
from the type locality; triangle, holotype; squares, paratypes.
Explanation of Plate 19, 114
Figs. 1, 2, car. (paratype, ASU X-206, 959 pm long): fig. 1, ext. It. lat.; fig. 2, ext. vent. Figs. 3, 4, car. (paratype, ASU X-207, 940 pm
long): fig. 3, ext. rt. lat.; fig. 4, ext. vent. Fig. 5, car. (paratype, ASU X-208, 996 pm long): ext. rt. lat.
Scale A (200 pm; x53), figs. 1, 2; scale B (200 /um; x54), figs. 3, 4; scale C (200 pm\ x51), fig. 5.
Stereo-Atlas of Ostracod Shells 19, 112
Rectella siveteri (4 of 4)
Rectella siveteri (2 of 4)
Stereo-Atlas of Ostracod Shells 19, 114
Stereo-Atlas of Ostracod Shells 19 (27) 115-118 (1992) Eurybolbina bispinata (1 of 4)
595.336.1 (1 13.312) (755 + 766 : 162.098.34): 551.351 + 552.54
ON EURYBOLBINA BISPINATA (HARRIS)
by Mark Williams & C. Giles Miller
(University of Leicester, England)
Genus EURYBOLBINA Copeland, 1982
Type-species (by original designation): Ctenobolbina bispinata Harris, 1957
Diagnosis: Unisulcate Ampletochilinae with S2 deep adjacent indistinct preadductorial node. Velum entire, narrowing
towards cardinal corners in heteromorph and tecnomorph. Heteromorph with convex dolonal antrum extending
from mid-anterior to ventral region. Admarginal ridges on both valves. Right valve with fluted overlap frill
abutting against the marginal ridge of the left valve.
Remarks: Eurybolbina is morphologically similar to Levisulculus Jaanusson, 1957, which has similar sulcation, marginal
structures and dimorphism but whose dolonal antrum is more distinct anteriorly. Moreover, Levisulculus does
not have the fluted overlap frill of the right valve and the velum tends to be less well developed posteriorly.
Copeland (1982) considered that Eurychilina bulbinoda Kraft of Swain, 1962 was not the same species as E.
bulbinoda Kraft, 1962. Copeland included Swain’s material in Eurybolbina ; however, dimorphism is not yet
known in this species and its placement in Eurybolbina must remain tentative.
Eurybolbina bispinata (Harris, 1957)
?1890 Ctenobolbina obliqua n. sp., E.O. Ulrich, J. Cincinn. Soc. nat. Hist., 13, 180, pi. 8, fig. 4.
1957 Ctenobolbina bispinata n. sp., R.W. Harris, Bull. Okla. geol. Surv., 55, 214, pi. 9, figs. la-c.
1961 Ctenobolbina obliqua Ulrich; in: R.C. Moore (ed.), Treatise on Invertebrate Paleontology, Kansas, Pt. Q, 135, figs. 67 la-f.
1962 Ctenobolbina obliqua Ulrich; J.C. Kraft, Mem. geol. Soc. Am., 6, 46, pi. 11, figs. 7-13, text-figs. lOj, k.
1982 Eurybolbina krafti n. sp., M.J. Copeland, Bull. geol. Surv. Can., 347, 11, pi. 2, figs. 11-17.
1982 Eurybolbina bispinata (Harris); M.J. Copeland, Ibid., Ml, 11, pi. 2, figs. 1-10.
Explanation of Plate 19, 116
Figs. 1, 2, 9 RV (OS13536, 1.05 mm long): fig. 1, ext. lat.; fig. 2, obi. vent. Figs. 3, 4, o * LV (OS14028, 1.16 mm long): fig. 3, obi.
vent.; fig. 4, ext. lat.
Scale A (200 pm; x58), figs. 1-4.
Stereo-Atlas of Ostracod Shells 19, 117 Eurybolbina bispinata (3 of 4)
Holotype:
Type locality:
Figured specimens:
Diagnosis:
Remarks:
Distribution:
Ackno w led gem en ts:
Museum of Comparative Zoology, Harvard University, U.S.A., no. MCZ4607; a tecnomorphic carapace.
From Decker’s Zone 3 (see Harris 1957, op. cit.), Pooleville Member, Bromide Formation, Simpson Group,
middle Ordovician; Rock Crossing locality, Sec. 35, T.5S, R.1E, Criner Hills, Oklahoma, U.S.A.,
approximately lat. 34° 8' N, long. 97° 10' W.
The Natural History Museum, London [BMNH], nos. OS13536 (9 RV: PI. 19, 116, figs. 1, 2), OS14028 (O' LV:
PI. 19, 116, figs. 3, 4), OS13537 (o' LV: PI. 19, 118, figs. 5, 6), and OS13538 Guv. LV: PI. 19, 118, fig. 4).
Museum of Comparative Zoology, Harvard University, U.S.A., no. MCZ4607 (O' car.: PI. 19, 118, figs. 1-3, 7).
All BNHM specimens (silicified) from the Edinburg Formation, middle Ordovician of Virginia, U.S.A.
(collected by Dr J.E. Robinson). MCZ4607 (calcareous) from the type locality and horizon.
Species of Eurybolbina with sigmoidal S2 which is deep and pit-like adjacent to preadductorial node. Marginal
ridges join with the velum to produce alate-like prolongations at anterior and posterior cardinal corners.
Except for the presence of a small tubercle on the posteroventral lobe Ctenobolbina obliqua Ulrich, 1890, from
the middle Ordovician Prosser Formation of Minnesota, U.S.A. , is very similar to E. bispinata and may be
conspecific.
Copeland (1982, 11) considered that the middle Ordovician Esbataottine Formation of the District of
Mackenzie, Canada, contains two distinct species of Eurybolbina : one, conspecific with “Ctenobolbina”
obliqua Ulrich of Kraft (1962) from Virginia ( = erected as E. krafti sp. nov. Copeland 1982) and the other
conspecific with E. bispinata from the Bromide Formation of Oklahoma (see Harris 1957). However, Copeland
discussed no differences between these two species; moreover, examination of specimens from Virginia (silicified)
and Oklahoma (calcareous) indicates to us that they are conspecific.
E. bispinata occurs in marine, subtidally deposited lithofacies of the Pooleville Member of the Bromide
Formation, Oklahoma and the Edinburg Formation of Virginia, both middle Ordovician of the U.S.A. It also
occurs in similar lithofacies in the middle Ordovician Esbataottine Formation, District of Mackenzie, Canada
(see Copeland 1982).
M. Williams gratefully acknowledges support from the Alexander von Humboldt Foundation and the University
of Frankfurt, Geological-Palaeontological Institute, Germany.
Explanation of Plate 19, 118
Figs. 1-3, 7, O’ car. (MCZ4607, 0.71 mm long): fig. 1, LV ext. lat.; fig. 2, detail of overlap frill; fig. 3, LV obi. lat.; fig. 7, detail of
S2. Figs. 5, 6, o' LV (OS13537, 1.05 mm long): fig. 5, int. lat.; fig. 6, vent. Fig. 4, juv. LV, ext. lat. (OS13538, 0.68 mm long).
Scale A (100 ^m; x80), figs. 1, 3; scale B (200 ^m; x66), fig. 4; scale C (200 /rm; x54), figs. 5, 6; scale D (50//m, x240), figs. 2, 7.
Stereo-Atlas of Ostracod Shells 19, 116
Eurybolbina bispinata (2 of 4)
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Stereo-Atlas of Ostracod Shells 19, 118
Eurobolbina bispinata (4 of 4)
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Stereo-Atlas of Ostracod Shells 19 (28) 119-122 (1992) Eohollina depressa (1 of 4)
595.336.1 (113.312) (766 : 162.098.34): 551.351 + 552.54
ON EOHOLLINA DEPRESSA (KAY)
by Mark Williams & C. Giles Miller
(University of Leicester, England)
Eohollina depressa (Kay, 1940)
1940 Bromidella depressa n. sp. G.M. Kay, J. Paleont., 14, 263, pi. 34, figs. 12-15.
1957 Eohollina depressa (Kay); R.W. Harris, Bull. Okla. geol. Surv., 75, 208, pi. 7, figs. 2a-d.
1957 Eohollina depressa papillata n. subsp. R.W. Harris, Bull. Okla. geol. Surv., 75, 209, pi. 7, figs. 3a, b.
1962 Bromidella depressa Kay; J.C. Kraft, Mem. geol. Soc. Am., 86, 43, pi. 15, figs. 8-17, text-figs. 14g, h.
1965 Eohollina depressa (Kay); M.J. Copeland, Bull. geol. Surv. Can., 127, 9, pi. 8, figs. 14-16, 21-23.
1982 Eohollina depressa (Kay); M.J. Copeland, Bull. geol. Surv. Can., 347, 10, pi. 2, figs. 18-19.
Holotype: Department of Geology, Columbia University, U.S.A., no. 27592c; heteromorphic right valve.
Type locality: Ion member of the middle Ordovician Decorah Formation, near Cannon Falls, Minnesota, U.S.A. (see Kay
1940, 263); approximately lat. 44°30'N, long. 92°42'W.
Figured specimens: Museum of Comparative Zoology, Harvard University, U.S.A. , nos. MCZ4599A (9 LV; PI. 19, 120, fig. 3)
MCZ4599B (cr.: PI. 19, 120, figs. 1,2) and MCZ4600 (9 LV: PI. 19, 122, fig. 1). The Natural History Museum,
London [BMNH], nos. OS13544 (o ■ car.: PI. 19, 122, fig. 2) and OS13540 (cr car.: PI. 19, 122, fig. 3).
All the figured specimens come from the Bromide Formation of Oklahoma. Unless otherwise stated, all
localities are described in Harris (1957). MCZ4599A is from Decker’s Zone 22, Mountain Lake Member, U.S.
Highway 77 Section. MCZ4599B is from Decker’s Zone 22 and MCZ4600 is from Decker’s Zone 36, Mountain
Lake Member, U.S. Highway 99 Section. OS13540 is from the Pooleville member, Spring Creek Section (see Fay
et a/., 1982, Paleont. Contr. Univ. Kans., Monogr., 1, 336, measured section 1) and OS13544 is from the
Mountain Lake Member, U.S. Highway 99 Section.
Explanation of Plate 19, 120
Figs. 1, 2, O’ car. (MCZ4599B, 0.75 mm long): fig. 1, It. ext. lat.; fig. 2, obi. vent. Fig. 3, 9 LV, ext. lat. (MCZ4599A, 0.67 mm long).
Scale A (100/rm; x81), figs. 1, 2; scale B (100/rm; x87), fig. 3.
Stereo-Atlas of Ostracod Shells 19, 121
Eohillina depressa (3 of 4)
Diagnosis:
Remarks:
Distribution:
Acknowledgements:
Species of Eohollina with anterior lobe often divided by a bifurcation of the postadductorial sulcus. Anterior
and posterior lobes overreaching the dorsal margin. Lobal surface commonly tuberculate and papillate.
Positioning of tubercles apparently constant. External surface of dolonal antrum striate.
Harris (1957, 208, 209) considered Eohollina to include the species E. depressa and the subspecies E. depressa
papillata in the upper part of the Simpson Group (Tulip Creek and Bromide formations), Oklahoma. The
subspecies was distinguished by the presence of stronger tubercles, and by its apparent separate stratigraphic
range (according to Harris, occurring in the Tulip Creek Formation, whereas E. depressa occurs in the Bromide
Formation). Reappraisal of the stratigraphy of the section on which Harris based his type for the subspecies (see
Fay et al. 1982, op. cit., 355, measured section 11a) shows the subspecies to be in the Bromide Formation.
Additionally Harris’ specimens of E. depressa which lack tubercles appear to be abraded forms. A range of
samples recovered (by M.W.) from the Bromide Formation show that specimens of Eohollina have variably
developed tuberculation, ranging from non-tuberculate to strongly tuberculate forms. Thus the differences
between E. depressa and E. depressa papillata are not therefore considered to be significant enough to warrant
the use of a separate subspecific name. Observation of many specimens of E. depressa suggest that the position-
ing of tubercles is constant, however.
Eohollina rhomboides (Kay 1940, op. cit., 263) is known only from non-tuberculate (denuded?) hetero-
morphic valves and is apparently very rare. It may be conspecific with E. depressa.
E. depressa is widespread in the middle Ordovician of N America occurring in marine, subtidally deposited
sediments of the Mountain Lake and Pooleville members of the Bromide Formation, Oklahoma, the Ion and
Gutenburg members of the Decorah Formation in Iowa and Minnesota (Kay 1940, op. cit.), and the Lincolnshire
and Edinburg formations of Virginia (Kraft 1962, op. cit.). It is also present in the lower unit of the Liskeard
Formation, Lake Timiskaming, Ontario (Copeland 1965, op. cit.) and the Esbataottine Formation, District of
Mackenzie (Copeland 1982, op. cot.), both middle Ordovician of Canada.
M. Williams gratefully acknowledges support from the Alexander von Humboldt Foundation and the University
of Frankfurt Geological-Palaeontological Institute, Germany.
Explanation of Plate 19, 122
Fig. 1 , 9 LV, ext. lat. (MCZ4600, 0.70 mm long). Fig. 2, cr car., rt. ext. lat. (OS13544, 0.76 mm long). Fig. 3, cr car., dors. (OS13540,
0.78 mm long).
Scale A (100 pm] x84), figs. 1, 2; scale B ( 200pm ; x78).
Stereo-Atlas of Ostracod Shells 19, 120
Eohollina depressa (2 of 4)
Stereo-Atlas of Ostracod Shells 19, 122
Eohollina depressa (4 of 4)
Stereo-Atlas of Ostracod Shells 19 (29) 123-130 (1992) Monasterium oepiki (1 of 8)
595.330 (113.23) (943 : 163.139.22): 551.351
ON MONASTERIUM OEPIKI FLEMING
by Ingelore C.U. Hinz
(University of Hamburg, Germany)
Genus MONASTERIUM Fleming, 1973
Type-species (by original designation): Monasterium oepiki Fleming, 1973
Diagnosis: Equivalved, subamplete with slight forward swing. Valve outline almost semicircular. Dorsal rim straight, valves separated dorsally by
simple line of demarcation. Free margin equally convex, free marginal area with doublure along inner side. Maximum length of valve within
dorsal third, maximum convexity anterodorsally. Anterodorsal field with large, horn-like spine, pointing posteriorly; triangular depressed
area behind spine. Outer surface smooth to reticulate.
Remarks: The most striking characteristic of Monasterium is its large, anterodorsal, hollow spine. There are only a few archaeocopid taxa which show
a similar dorsal differentiation; for example, the contemporaneous Cambraechmina and Dorispina from Australia (Hinz, I., Neues Jb.
Geol. Palaont. Mh., 1992) and a fragment published from China as Preaechmina (Shu, D., Cambrian and Lower Ordovician Bradoriida
from Zhejiang, Hunan and Shaanxi Provinces, Northwest Univ. Publ. Hse., Xian, 63, 1990).
From published data, the genus Xichuanella Zhao (1989, Acta palaeont. sin., 28, 472, pi. 1, fig. 3) seems to be a junior synonym of
Monasterium. The type-species, M. bucerum, was originally assigned to Monasterium by Zhang (1987, Alcheringa, 11, 1, 11).
In 1973 Fleming (Pubis geol. Surv. Qd., 356, 8, 9) assigned the genus Monasterium to the family Beyrichonidae Ulrich & Bassler (1931,
Proc. U.S. natn. Mus., 78, 4, 42). However, except for the triangular, anterodorsal depression, which is a common characteristic of
archaeocopid ostracods (in particular of Bradorina), Monasterium has nothing in common with Beyrichonidae. The latter are characterized
by a subtriangular, smooth to rarely punctate carapace, and the compressed anterodorsal area behind the eye tubercle is bordered by various
ridges or nodes. Apart from that, their strong spines or horns, respectively, cannot be regarded as “exaggerated eye tubercles”. Contrary
to Fleming (1973, op. cit.), Jones & McKenzie (1980, Alcheringa, 4, 216, 217) erected the monotypic family Monasteriidae and assigned it
to the suborder Phosphatocopina Muller (1964, Neues Jb. Geol. Palaont. Abh., 121, 18) based on the nature of their (phosphatic) shells.
They recognized some of the criteria, which Muller (1979, Lethaia, 12, 9-11) established, to differentiate between phosphatic shell structure
and secondarily phosphatized fossils; for example, shell completeness, thickness, smoothness and internal structure. However, as the
specimens described herein come from phosphorite deposits, the nature of their shell substance is not considered to be a reliable criterion.
The whole fauna is secondarily phosphatized or silicified, which prevents evaluation of the orginal shell substance. Thin-sections reveal
Explanation of Plate 19, 124
Fig. 1, car., ext. dors. (CPC 23553, 0.42 mm long). Fig. 2, car., ext. dors. (CPC 23554, 0.32mm long). Fig. 3, car., ext. dors.
(CPC 23555, 0.30 mm long).
Scale A (100 gm; Xl50), fig. 1; scale B (250/rm; xl20), fig. 2; scale C (100 pm; Xl40), fig. 3.
Stereo-Atlas of Ostracod Shells 19, 125 Monasterium oepiki (3 of 8)
rather irregular and ill-defined lamellae which are distinctly different from those in primary phosphatic carapaces. They point to a substitu-
tion of the original shell by phosphate rather than to a primary phosphatic shell.
The material illustrated herein shows the presence of a doublure ( = “inner lamella”), which was supposed by Muller (1964, op. cit., tab.
1) to be a distinguishing character between Phosphatocopina and the Bradorina (which lack an inner lamella). However, the general
appearance of Monasterium accords more with bradorinid ostracods than with phosphatocopinids. Albrunnicola oelandicus (Andres,
Lethaia, 2, 173-175, 1969) with its primary phosphatic shell and bradorinid gross morphology, may serve as another example that such a
high-rank taxonomic separation of Cambrian ostracods cannot be maintained at present (Hinz, Arch. Geschiebekde, 1, 232, 233, 1991).
The phosphatized shell of my Monasterium material is very thin and most of the specimens are more or less deformed. They appear to
have been entombed shortly after moulting, when the carapace was still rather soft. However, as the majority of the material is crumpled,
the carapaces are assumed to have had a relatively soft or flexible shell substance; it seems that a poorly mineralised, mainly organic-walled
carapace was a primary character of Monasterium . On the other hand, the existence of a large spine infers a certain shell hardness. Since
the spine is hollow, it may have functioned as a floatation device.
The dorsal margin of the carapace is marked by a fine incision where the two valves meet. Contrary to most of the phosphatocopinid
ostracods sensu Muller (1964, op. cit.), which may be merely infolded dorsally (like the punciid ostracods described by Swanson, 1989, Cour.
Foschlnst. Senckenberg, 113, pi. 1, fig. 6, pi. 3, figs. 12-14), and which are therefore preserved with both valves attached to each other,
Monasterium occurs as both carapaces and as (small numbers of) isolated valves. However, the occurrence of isolated valves may indicate
that the dorsal conjunction in Monasterium was originally not as strong as, for example, in contemporaneous phosphatocopinid ostracods
such as Semillia pauper Hinz (1992, Stereo-Atlas Ostracod Shells, 19, 13-16).
Concerning the occurrence of isolated valves, it is most likely that the separation occurred before phosphatisation, because thin-sections
of secondarily phosphatized carapaces hardly document any partition either dorsally or along the free margin.
Monasterium oepiki Fleming, 1973
1973 Monasterium opiki n. gen., n. sp. (sic. ) P.J.G. Fleming, op. cit., 356, 8, 9, pi. 2, figs. 6-12, pi. 4, figs. 1-4.
1980 Monasterium oepiki Fleming; P.J. Jones & K.G. McKenzie, op. cit., 4, 216, 217.
1987 Monasterium oepiki Fleming; X.-G. Zhang, op. cit., 11, 1, 11, pi. 2.
1990 Monasterium oepiki Fleming; D. Shu, op. cit., 63.
Holotype: Geological Survey of Queensland, University of Brisbane, GSQF 11965(10); carapace.
Type locality: About 1.6 km N of Mt. Murray, on Chatsworth Station, Duchess phosphorite field, Queensland, Australia, approx. 21°47'S, 139°59'E.
Monastery Creek Phosphorite Member, Beetle Creek Formation, Templetonian, middle Cambrian. Bureau of Mineral Resources locality
D640.
Figured specimens: Bureau of Mineral Resources, Canberra, Australia, nos. CPC 23553 (car.: PI. 19, 124, fig. 1), CPC 23554 (car.: PI. 19, 124, fig. 2), CPC
23555 (car.: PI. 19, 124, fig. 3), CPC 23556 (car.: PI. 19, 126, fig. 1), CPC 23557 (car.: PI. 19, 126, fig. 2), CPC 23558 (car.: PI. 19, 126,
Explanation of Plate 19, 126
Fig. 1, car., int. (CPC 23556, 0.27 mm long). Fig. 2, car., ext. dors. (CPC 23557, 1.76 mm long). Fig. 3, car., ext. vent. (CPC 23558,
0.8 mm long). Fig. 4, car., ext. It. (CPC 23559, 1.53 mm long).
Scale A (50 gm; xl90), fig. 1; scale B (250 gm; x33), fig. 2; scale C (100 /tm; x75), fig. 3; scale D (250 /tm; x49), fig. 4.
Stereo-Atlas of Ostracod Shells 19, 124
Monasterium oepiki (2 of 8)
Stereo-Atlas of Ostracod Shells 19, 126
Monasterium oepiki (4 of 8)
Stereo-Atlas of Ostracod Shells 19, 127 Monasterium oepiki (5 of 8)
fig. 3), CPC 23559 (car.: PI. 19, 126, fig. 4), CPC 23560 (broken car.: PI. 19, 128, fig. 1), CPC 23561 (car.: PI. 19, 128, fig. 2), CPC 23562
(car.: PI. 19, 128, fig. 3), CPC 23563 (LV: PI. 19, 128, fig.4), CPC 23564 (car.: PI. 19, 130, figs. 1, 3), CPC 23565 (car.: PI. 19, 130, fig.
3). Nos. 23555, 23557, 23558, 23561-63, 23565 are from the type locality. No. 23553 is from excavation T15, Phosphate Hill, about 140 km
SSE of Mt. Isa. No. 23554 is from section 411, Thorntonia, about 146 km NNW of Mt. Isa. Nos. 23556, 23559, 23560, 23564 are from Mt.
Murray. All specimens are from the Duchess phosphorite field, eastern Georgina Basin, Queensland, Australia; Templetonian, middle
Cambrian.
Diagnosis: General outline as for the genus except for dorsal margin which becomes medially arched in larger instars. Free marginal area somewhat
expanded and distinctly set off from rest of valve. From base of anterodorsal spine distinct comarginal ridge extending posteriorly. Narrow
ridge in posterodorsal field, below posterocardinal corner, and passing smoothly into marginal area.
Remarks: Hitherto, five species have been assigned to the genus Monasterium: M. oepiki Fleming (1973, op cit.), M. dorium Fleming (1973, op cit.,
8, 9), M. bucerum Zhang (1987, op cit.), M. ivshini Melnikova (1990, Old. Akademia Nauk SSSR, Sibirsk., 765, 174, 175, pi. 32, fig. 1)
and M. seletinensis Melnikova (1990, op. cit., 175, pi. 32, figs. 2-4). M. seletinensis has a porous shell and lacks the typical anterodorsal
spine. It certainly should not be included in the genus Monasterium. M. bucerum is based on three specimens of which only one is an identifi-
able specimen (carapace); it has a reticulate sculpture and a spine close to one of the cardinal corners. The same illustration of the specimen
was repeatedly published by various authors, for example Huo et at. (1989, J. S. east Asian Earth Sci., 3, 107-118) and Zhao (1989, Acta
palaeont. sin., 28, 463-473). The latter author established the new genus Xichuanella for M. bucerum.
Concerning the ontogeny of M. oepiki, Fleming (1973, op. cit.) recognized five growth stages, whereas Jones & McKenzie (1980, op. cit.)
suspected eight to nine growth stages in more than 300 specimens ranging from 0.4 to >2.5 mm in length. The largest specimen is broken,
and only the height could be measured exactly (1.725 mm). A new estimate of the length is 2.28 mm (Jones, P., 1992, pers. comm.) The L : H
diagram (see Text-fig. 1, right) of this study is based on measurements of 186 specimens, with the smallest larva being 0.257 mm long and
the largest carapace reaching 2. 1 mm in length. Still larger carapaces exist but could not be assigned to Monasterium with certainty. The shape
(“gestalt” = L:H ratio) (seeText-fig. 1, left) is usually very high (< 1.45): mean 1.40; it varies between 1.23 (very high) and 2.10 (very long),
but the extreme values are rare. 78.5% of the measured specimens are very high.
The moult stages are not clearly differentiated (Text-fig. 1) in my material of M. oepiki', this may be the result of mixed populations or
a considerable variation in size, controlled by ecological factors. However, 10-11 stages (several more than in Recent ostracods) seem to be
indicated by my data, which thus would follow quite precisely the growth factor (1.26) calculated by Przibram (see R.V. Kesling, J. Paleont.,
26, 772, 1952) for the increase of mass. The rather high average gestalt of the carapace ( = 1.4) remains fairly constant throughout ontogeny.
The extremely thin shell substance, which was subject to considerable crumpling, may preclude (particularly in large specimens) proper
identification of the species. The high number of moult stages seems to be a general characteristic of Archaeocopa. The small instars of M.
oepiki have extremely long anterodorsal spines that may be several times longer than the length of the carapace, and which are themselves
adorned with tiny spines or hooks. This is a feature also observed in other Lower Palaeozoic ostracods, such as Processobairdia Becker
(1982, Palaeontographica, A178(4/6), pi. 2, figs. 5-11), and Tricornina Becker (1982, op. cit., pi. 9, figs. 2, 3). The spines extend
Explanation of Plate 19, 128
Fig. 1, LV, int. (CPC 23560, 0.8 mm long). Fig. 2, car., ext. ant. (CPC 23561, 0.64mm long). Fig. 3, car., ext. ant. (CPC 23562,
0.88 mm long). Fig. 4, car. ext. rt. (CPC 23653, 0.75 mm long).
Scale A (100 /tm; x85), fig. 1; scale B (250/rm; x62), figs. 2, 3; scale C (100 /tm; x80), fig. 4.
Stereo-Atlas of Ostracod Shells 19, 129 Monasterium oepiki (7 of 8)
perpendicular to the valve surface, which may indicate a planktonic mode of life. By contrast, the relative size of the anterodorsal spines
decreases during ontogeny, and their direction changes from being lateral cantilevers to spines which are directed obliquely up- and
backwards.
Another, relevant change during ontogeny affects the dorsal rim, which changes from being straight-backed into a medially arched-shaped
feature. The reason for this change is unclear and problematic, as it must have definitely complicated the opening and closure of the cara-
pace. This feature is not comparable with those post-Cambrian ostracods that are characterized by a convex dorsal area. In the latter cases
either a mediodorsal lobe rises above the hinge line, or the hinge extends over only part of the dorsal area in order to guarantee a straight
hingement. In M. oepiki, the dorsal inision clearly extends over the entire dorsal area.
The other species described by Flemming (1973, op. cit.), M. dorium, occurs with M. oepiki, but is much rarer. It differs from M. oepiki
in the lack of a posterodorsal rib, the distinct comarginal central rib and a defined marginal rim. The granular sculpture, considered by
Fleming as a distinguishing feature between those two taxa, is considered to be a preservational rather than a taxonomic characteristic.
Ontogenetic changes in carapace shape could not be observed in M. dorium, but this taxon appears to attain a length of less than 1 mm,
which is less than half the size of M. oepiki. It may be either a smaller-sized species or insufficiently documented due to its rarity.
L/
H
1,9
1.6
1.3
■v'O,
f? 'V
L
H
(mm),
1.5
t
0.5,
/ . —
•»*
0.5 i 15 2
Text-fig. 1. Ontogeny of Monasterium oepiki.
Explanation of Plate 19, 130
Fig. 1, 3, car., ext. rt. (CPC 23564, 1.4 mm long). Fig. 2, car., ext. rt. (CPC 23565, 1.9 mm long.
Scale A (250/rm; x53), fig. 1; scale B (250/rm; x40), fig. 2; scale C (50 pm; x212), fig. 3.
L (mm)
Stereo-Atlas of Ostracod Shells 19, 128
Monasterium oepiki (6 of 8)
Monasterium oepiki (8 of 8)
Stereo-Atlas of Ostracod Shells 19, 130
Stereo-Atlas of Ostracod Shells 19 (30) 131-133 (1992)
Index, Volume 19, 1992 (1 of 3)
General Index
Anchistrocheles eximia Herrig sp. nov.; 99-102
Arcacythere aurani Babinot & Colin sp. nov.; 91-94
aurani, Arcacythere-, 91-94
Ayress, M. A., On Kuiperiana juglandica Ayress sp. nov.; 75-78
Ayress, M. A. & Correge, T., On Semicytherura pulchra (Coles & Whatley); 57-60
Ayress, M. A., Drapala, V. & Correge, T., On Swainocythere nanseni (Joy & Clark); 107-110
Babinot, J.-F. & Colin, J.-P., On Arcacythere aurani Babinot & Colin sp. nov.; 91-94
Becker, G. & Blumenstengel, H., On Processobairdia nodocerata Blumenstengel; 87-90
Becker, G. & Coen, M., On Glezeria belgica (Matern); 29-32
Becker, G. & Weyer, D., On Gerodia ratina (Griindel); 79-82
Becker, G. & Weyer, D., On Rabienoscapha tergocornuta Becker; 83-86
belgica, Glezeria-, 29-32
bicornuta, Strandesia; 61-66
bispinata, Eurybolbina-, 115-118
Blumenstengel, H. & Becker, G., On Processobairdia nodocerata Blumenstengel; 87-90
Bodergat, A.-M. & Boomer, I., On Cytheropteron byfieldense Boomer & Bodergat sp. nov.; 1-4
Boomer, I. & Bodergat, A.-M., On Cytheropteron byfieldense Boomer & Bodergat sp. nov.; 1-4
byfieldense, Cytheropteron-, 1-4
ceratina, Pseudocandona-, 41-48
Coen, M. & Becker, G., On Glezeria belgica (Matern); 29-32
Coker, J. E. & Dewey, C. P., On Glyptopleuroides insculptus Croneis & Gale; 25-28
Colin, J.-P. & Babinot, J.-F.. On Arcacythere aurani Babinot & Colin sp. nov.; 91-94
Correge, T., On Jonesia marecorallinensis Correge sp. nov.; 103-106
Correge, T. & Ayress, M. A., On Semicytherura pulchra (Coles & Whatley); 57-60
Correge, T., Ayress, M. A. & Drapala, V., On Swainocythere nanseni (Joy & Clark); 107-110
Cuneoceratina exornata (Herrig); 17-20
Cytheropteron byfieldense Boomer & Bodergat sp. nov.; 1-4
depressa, Eohollina ; 119-122
Dewey, C. P. & Croker, J. E., On Glyptopleuroides insculptus Croneis & Gale; 25-28
Dewey, C. P. & Kohn, P., On Kindlella melnyki Dewey & Kohn sp. nov.; 95-98
Dewey, C. P. & Kohn P., On Richterina permiana Kohn & Dewey sp. nov.; 71-74
Drapala, V., Correge, T. & Ayress, M. A., On Swainocythere nanseni (Joy & Clark); 107-110
Eohollina depressa (Kay); 119-122
Eurybolbina bispinata (Harris); 115-118
eximia, Anchistrocheles-, 99—102
exornata, Cuneoceratina-, 17-20
Eidelitella (Sibiritella) rara (Ivanova); 37-40
gajewskajae, Pseudocandona-, 49-56
Geisina gregaria (Ulrich & Bassler); 67-70
George, S. & Martens, K., On Strandesia bicornuta Hartmann; 61-66
Gerodia ratina (Griindel); 79-82
Glezeria belgica (Matern); 29-32
Glytopleuroides insculptus Croneis & Gale; 25-28
gregaria, Geisina-, 67-70
hartmanni, Kanyginia-, 33-36
Hecht, G. D. & Kaesler, R. L., On Geisina gregaria (Ulrich & Bassler); 67-70
Herrig, E., On Anchistrocheles eximia Herrig sp. nov.; 99-102
Herrig, E., On Cuneoceratina exornata (Herrig); 17-20
Hinz, I. C. U., On Monasterium oepiki Fleming; 123-130
Hinz, I. C. U., On Pejonesia sestina (Fleming); 5-8
Hinz, I. C. U., On Semiilia pauper Hinz gen. et sp. nov.; 13-16
Hinz, I. C. U. & Jones, P. J., On Tubupestis tuber Hinz & Jones gen. et sp. nov.; 9-12
insculptus, Glyptopleuroides-, 25-28
Jones, P. J. & Hinz, I. C. U., On Tubupestis tuber Hinz & Jones gen. et sp. nov.; 9-12
Jonesia marecorallinensis Correge sp. nov.; 103-106
juglandica, Kuiperiana-, 75-78
Kaesler, R. L. & Hecht, G. D., On Geisina gregaria (Ulrich & Bassler); 67-70
Kanygin, A. V. & Schallreuter, R. E. L., On Fidelitella (Sibiritella) rara (Ivanova); 37-40
Kanygin, A. V. & Schallreuter, R. E. L., On Kanyginia hartmanni Schallreuter & Kanygin sp. nov.; 33-36
Kanyginia hartmanni Schallreuter & Kanygin sp. nov.; 33-36
Kindlella melnyki Dewey & Kohn sp. nov.; 95-98
Kohn, P. & Dewey, C. P., On Kindlella melnyki Dewey & Kohn sp. nov.; 95-98
Kohn, P. & Dewey, C. P. On Richterina permiana Kohn & Dewey sp. nov.; 71-74
Kuiperiana juglandica Ayress sp. nov.; 75-78
Lundin, R. F. & Petersen, L. E., On Rectella siveteri Petersen & Lundin sp. nov.; 111-114
Lundin, R. F. & Petersen, L. E., On Scaldianella simplex (Krause); 21-24
marecorallinensis, Jonesia-, 103-106
Martens, K. & George, S., On Strandesia bicornuta Hartmann; 61-66
Martens, K., Noskova, I. & Mazepova, G., On Pseudocandona ceratina Mazepova; 41-48
Martens, K., Noskova, I. & Mazepova, G., On Pseudocandona gajewskajae Bronstein; 49-56
Mazepova, G., Martens, K. & Noskova, I., On Pseudocandona ceratina Mazepova; 41-48
Mazepova, G., Martens, K. & Noskova, I., On Pseudocandona gajewskajae Bronstein; 49-56
melnyki, Kindlella-, 95-98
Miller, C. G. & Williams, M., On Eohollina depressa (Kay); 119-122
Miller, C. G. & Williams, M., On Eurybolbina bispinata (Harris); 115-118
Monasterium oepiki Fleming; 123-130
Stereo-Atlas of Ostracod Shells 19, 132
Index, Volume 19, 1992 (2 of 3)
nanseni, Swainocythere ; 107-110
nodocerata, Processobairdia-, 87-90
Noskova, I., Mazepova, G. & Martens, K., On Pseudocandona ceratina Mazepova; 41-48
Noskova, I., Mazepova, G. & Martens, K., On Pseudocandona gajewskajae Bronstein; 49-56
oepiki, Monasterium; 123-130
pauper. Semiilia ; 13-16
Pejonesia sestina (Fleming); 5-8
permiana, Richterina; 71-74
Petersen, L. E. & Lundin, R. F., On Rectella siveteri Petersen & Lundin sp. nov.; 111-114
Petersen, L. E. & Lundin, R. F., On Scaldianella simplex (Krause); 21-24
Processobairdia nodocerata Blumenstengel; 87-90
Pseudocandona ceratina Mazepova; 41-48
Pseudocandona gajewskajae Bronstein; 49-56
pulchra, Semicytherura-, 57-60
Rabienoscapha tergocornuta Becker; 83-86
rara, Fide/itella ( Sibiritella ); 37-40
ratina, Gerodia ; 79-82
Rectella siveteri Petersen & Lundin sp. nov.; 111-114
Richterina permiana Kohn & Dewey sp. nov.; 71-74
Scaldianella simplex (Krause); 21-24
Schallreuter, R. E. L. & Kanygin, A. V., On Fide/itella (Sibiritella) rara (Ivanova); 37-40
Schallreuter, R. E. L. & Kanygin, A. V., On Kanyginia hartmanni sp. nov.; 33-36
Semicytherura pulchra (Coles & Whatley); 57-60
Semillia pauper Hinz gen. et sp. nov.; 13-16
sestina, Pejonesia ; 5-8
simplex, Scaldianella-, 21-24
siveteri, Rectella ; 111-114
Strandesia bicornuta Hartmann; 61-66
Swainocythere nanseni (Joy & Clark); 107-110
tergocornuta, Rabienoscapha-, 83-86
tuber, Tubupestis; 9-12
Tubupestis tuber Hinz & Jones gen. et sp. nov.; 9-12
Weyer, D. & Becker, G., On Gerodia ratina (Griindel); 79-82
Weyer, D. & Becker, G., On Rabienoscapha tergocornuta Becker; 83-86
Williams, M. & Miller, C. G., On Eohollina depressa (Kay); 119-122
Williams, M. & Miller, C. G., On Eurybolbina bispinata (Harris); 115-118
Stereo-Atlas of Ostracod Shells 19, 133
Index, Volume 19, 1992 (3 of 3)
Index; Geological Horizon
See 1 (1) 5-22 (1973) for explanation of the Schedules in the Universal Decimal Classification
Geisina gregaria; 67-70
Index; Geographical Location
See 1 (1) 5-22 (1973) for explanation of Schedules in the Universal Decimal Classification
The editors gratefully acknowledge financial support from
Esso UK Ltd. for the publication of this volume.
BPCC Blackpool
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19 (14)
19 (15)
19 (16)
19 (17)
19 (18)
19 (19)
19 (20)
19 (21)
19 (22)
19 (23)
19 (24)
19 (25)
19 (26)
19 (27)
19 (28)
19 (29)
19 (30)
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Stereo-Atlas of Ostracod Shells: Vol.19, Part 2
CONTENTS
61-66 On Strandesia bicomuta Hartmann; by K. Martens & S. George.
67-70 On Geisina gregaria (Ulrich & Bassler); by R.L. Kaesler & G.D. Hecht.
71-74 On Richterina permiana Kohn & Dewey sp. nov.; by P. Kohn & C.P. Dewey.
75-78 On Kuiperiana juglandica Ayress sp. nov.; by MA. Ayress.
79-82 On Gerodia ratina (Griindel); by G. Becker & D. Weyer.
83-86 On Rabienoscapha tergocomuta Becker & Weyer; by G. Becker & D. Weyer.
87-90 On Processobairdia nodocerata Blumenstengel; by G. Becker & H. Blumenstengel.
91-94 On Arcacythere aurani Babinot & Colin sp. nov.; by J.-F. Babinot & J.-P. Colin.
95-98 On Kindlella melnyki Dewey & Kohn sp. nov.; by C.P. Dewey & P. Kohn.
99-102 On Anchistrocheles eximia Herrig sp. nov.; by E. Herrig.
103-106 On Jonesia marecorallinensis Correge sp. nov.; by T. Correge.
107-110 On Swainocythere nanseni (Joy & Clark); by T. Correge, M. Ayress & V. Drapala.
111-114 On Rectella siveteri Petersen & Lundin sp. nov.; by L.E. Petersen & R.F. Lundin.
115-118 On Eurybolbina bispinata (Harris); by M. Williams & C.G. Miller.
119-122 On Eohollina depressa (Kay); by M. Williams & C.G. Miller.
123-130 On Monasterium oepiki Fleming; by I.C.U. Hinz.
131-133 Index for Volume 19, (1992).
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