Hiatobairdia sp. 2

Fig. 8 C–E

Material examined

ROMANIA • 1 complete carapace; Black Sea, Romanian Continental Shelf, borehole 817LV, sample CM31B; Rhaetian, Upper Triassic; MNHN.F. F63230 • 1 LV; same collection data as for preceding; Rhaetian, Upper Triassic; MNHN.F. F63231 • 2 LV; same collection data as for preceding; Rhaetian, Upper Triassic; MNHN.F. F63349 .

Dimensions

RV: L = 1068 µm; H = 644 µm; H/L = 0.6.

LV: L = 838–1068 µm; H = 520–695 µm; H/L = 0.62–0.63.

Occurrence

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

Remarks

Hiatobairdia sp. 2 is characterized by its very high and nearly symmetrical AB and PB, which clearly relates it to Hiatobairdia arcuata Kristan-Tollmann in Kristan-Tollmann et al., 1980 from the Rhaetian of Iran (Kristan-Tollmann et al. 1980). However, Hiatobairdia sp. 2 is differentiated from it by having the lateral surface not overhanging the ventral margin, absence of postero-ventral thickening and less pronounced antero-dorsal and postero-dorsal concavities. Hiatobairdia sp. 2 is undeniably a new species, but we lack enough material to define its diagnostic characters.