Pokornyopsis sp. 1, Kozur, 1974

Forel, Marie-Béatrice & Grădinaru, Eugen, 2020, Rhaetian (Late Triassic) ostracods (Crustacea, Ostracoda) from the offshore prolongation of the North Dobrogean Orogen into the Romanian Black Sea shelf, European Journal of Taxonomy 727, pp. 1-83 : 59

Pokornyopsis sp. 1

Fig. 13 B–C

Material examined

ROMANIA • 1 complete carapace; Black Sea , Romanian Continental Shelf , borehole 817LV, sample CM31B; Rhaetian, Upper Triassic; MNHN.F. F63318 .

Dimensions

L = 618 µm; H = 494 µm.

Occurrence

Romanian Continental Shelf, Black Sea, Rhaetian, Upper Triassic (this paper).

Remarks

Pokornyopsis feifeli ( Triebel, 1941) from the Early to Late Jurassic (see Tóth & Cséfán 2018 for a summary) is characterized by having strongly reticulate valves with parallel ribs surrounded by 3 concentric marginal ribs. Pokornyopsis sp. 1 has less numerous and more spaced parallel ribs on the lateral surface. The three marginal ribs of P. feifeli are here lacking, a strong thin ridge runs parallel to the free margin, the rostrum is more pronounced, and the incisure is deeper and narrower.

Figures

Fig. 13. SEM micrographs of ostracods from borehole 817 Lebăda Vest, drill core CM31, western portion of Black Sea shelf, Rhaetian, Late Triassic. All specimens are housed in the collections of the Muséum national d’histoire naturelle, Paris, France (MNHN). A. Leviella sp., external view of a left valve, sample CM31C (MNHN.F.F63317). B–C. Pokornyopsis sp. 1. B. Left lateral view of a carapace, sample CM31B (MNHN.F.F63318). C. Same specimen, dorsal view. D–E. Pokornyopsis? sp. 2. D. Left lateral view of a carapace, sample CM31A (MNHN.F.F63319).E. Right lateral view of a carapace, sample CM31A (MNHN.F.F63320). F. Pokornyopsis sp. 3, left lateral view of a carapace, sample CM31A (MNHN.F.F63321). G–I. Hungaroleberis sp. 1. G. Left lateral view of a carapace, sample CM31B (MNHN.F.F63322). H. Left lateral view of a carapace, sample CM31C (MNHN.F.F63323). I. Left lateral view of a carapace, sample CM31A (MNHN.F.F63324). J–L. Hungaroleberis sp. 2. J. Right lateral view of a carapace, sample CM31A (MNHN.F.F63325). K. Right lateral view of a carapace, sample CM31A (MNHN.F.F63326). L. Left lateral view of a carapace, sample CM31A (MNHN.F.F63327). M. Polycope sp. 1, lateral view of a carapace, sample CM31A (MNHN.F.F63328). N. Polycope sp. 2, lateral view of a carapace, sample CM31B (MNHN.F.F63329). O. Polycope sp. 3, lateral view of a carapace, sample CM31A (MNHN.F.F63330). P. Polycope sp. 4, lateral view of a carapace, sample CM31C (MNHN.F.F63331). Scale bars: 100 µm.