Cardobairdia, van den Bold, 1960 emend. McKenzie, 1967

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 : 55

Cardobairdia sp. 3

Fig. 12 D–F

Material examined

ROMANIA • 1 complete carapace; Black Sea , Romanian Continental Shelf , borehole 817LV, sample CM31C; Rhaetian, Upper Triassic; MNHN.F. F63302 • 1 RV; same collection data as for preceding; Rhaetian, Upper Triassic; MNHN.F. F63362 • 1 complete carapace; same locality as for preceding but sample CM31A; Rhaetian, Upper Triassic; MNHN.F. F63303 .

Dimensions

RV: L = 275–354 µm; H = 143–203 µm; H/L = 0.59–0.64.

LV: L = 283–299 µm; H = 168–192 µm; H/L = 0.52–0.59.

Occurrence

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

Remarks

Cardobairdia sp. 3 is very close to Cardobairdia cf. liassica (Drexler, 1958) in Monostori 2008 from the Pliensbachian of Hungary ( Monostori 2008: pl. 1, fig. 8). Cardobairdia has been attributed to the Sigilliidae , which are merodont hinge ostracods (e.g., Tabuki & Hanai 1999; Olempska 2001). Cardobairdia shows a crenulate posterior tooth, which might correspond to a merodont hingement. However, the ventral bar is not visible, so it is not possible to assess with certainty that it is crenulate or whether the lobes occur before and after the anterior and posterior teeth.

Figures

Fig. 12 (opposite page). 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–C. Cardobairdia sp. 2. A. Same specimen as in Fig. 11U (MNHN.F.F63300), dorsal view. B. Right lateral view of a carapace, sample CM31C (MNHN.F.F63301). C. Same specimen, dorsal view. D–F. Cardobairdia sp. 3. D. Right lateral view of a carapace, sample CM31C (MNHN.F.F63302). E. Details of posterior end of hingement of specimen shown in F. F. Right lateral view of a carapace, sample CM31A (MNHN.F.F63303). G–K. Cardobairdia sp. 4. G. Right lateral view of a carapace, sample CM31A (MNHN.F.F63304). H. Right lateral view of a carapace, sample CM31B (MNHN.F.F63305). I. Same specimen, dorsal view. J. Right lateral view of a carapace, sample CM31B (MNHN.F.F63306). K. Same specimen, dorsal view. L. Cardobairdia sp. 5, external view of a left valve, sample CM31C (MNHN.F.F63307). M. Cardobairdia? sp. 6, right lateral view of a carapace, sample CM31B (MNHN.F.F63308). N–Q. Hungarella koessenensis (Mette & Mohtat-Aghai, 1999). N. Right lateral view of a carapace, sample CM31B (MNHN.F.F63309).O. External view of a left valve, sample CM31B (MNHN.F.F63310). P. Inner view of a left valve, sample CM31B (MNHN.F.F63311). Q. External view of a right valve, sample CM31B (MNHN.F.F63312). R. Hungarella sp. 1, external view of a right valve, sample CM31B (MNHN.F.F63313). S. Hungarella? sp. 2, right lateral view of a carapace, sample CM31C (MNHN.F.F63314). T. Cytherelloidea cf. modesta Apostolescu, 1959, external view of a left valve, sample CM31B (MNHN.F.F63315). U. Cytherelloidea? sp., external view of a right valve, sample CM31A (MNHN.F.F63316). Scale bars: 100 µm.