Bairdiacypris multidentata Bolz, 1971

Fig. 6 D–E

Bairdiacypris multidentata Bolz, 1971b: 230–231, pl. 8, figs 98–100.

Bairdiacypris multidentata – Mette et al. 2012: 70.

Material examined

ROMANIA • 1 complete carapace; Black Sea, Romanian Continental Shelf, borehole 817LV, sample CM31A; Rhaetian, Upper Triassic; MNHN.F. F63199 • 1 complete carapace; same locality as for preceding but sample CM31B; Rhaetian, Upper Triassic; MNHN.F. F63200 • 1 broken carapace; same collection data as for preceding; Rhaetian, Upper Triassic; MNHN.F. F63343 .

Dimensions

See Fig. 3A.

Occurrence

Northern Calcareous Alps, Tyrol, Austria, Norian–Rhaetian, Upper Triassic (Bolz 1971b; Mette et al. 2012); Romanian Continental Shelf, Black Sea, Rhaetian, Upper Triassic (this paper).

Remarks

Bairdiacypris cf. multidentata Bolz, 1971 has been reported from the Eiberg Member, K̂ssen Formation, outcropping at the Eiberg section in the Northern Calcareous Alps (Mette et al. 2012: 70), but no illustration and no discussion were provided to further discuss this attribution. Bolz (1971b) provided dimensions of complete carapaces, LV and RV: owing to the overlap of LV over RV in B. multidentata, the dimensions of carapaces are here treated as those of LV and all dimensions are plotted in Fig. 3A. Bolz (1971b) illustrated three specimens and stated that the material was not sufficient for an investigation of the ontogeny (Bolz 1971b: 231). Although the lack of illustrated specimens doesn’t allow a discussion of the morphological changes in B. multidentata through its development, the large dispersion of the H/L scatter plot of all specimens points to a mixture of ontogenetic stages, at least corresponding to five ontogenetic stages (A-4 to adult). The holotype appears to be an immature stage. The only measurable carapace found during the present analysis (Fig. 6E) is the smallest known carapace of B. multidentata and corresponds to a very young juvenile in the A-4 stage (Fig. 3A).