Wareniconcha Cosel & Olu 2009

Wareniconcha ? sp.

Fig. 12I–J

ITALY – Emilia-Romagna • 1 spec.; Castel di Casio; MGGC 22329 (L = 31.0, H = 26.8, W = 15.8 mm).

Shell outline roundish-oval, umbo elevated, blunt; anterior margin acutely rounded, ventral margin convex; anterior adductor muscle scar elongate-oval; pallial line crenulate, close and parallel to ventral margin; no pallial sinus, but at its posterior end, the pallial line curves sharply upward and attaches to posterior adductor muscle scar at its anterior side. Shell with fine, radial, internal striations; posterior adductor muscle scar bound anteriorly by weak but distinct posterior ridge.

This shell is insufficiently preserved for a confident assignment to Wareniconcha: it lacks the external shell and hence the lunule and escutcheon remain unknown; the posterior margin is broken off; and the hinge dentition cannot be examined. However, overall the shell is very similar to the type species Wareniconcha guineensis (Thiele, 1931). It certainly is too short and has a too narrow and elongate anterior adductor muscle scar to be an aberrant specimen of Archivesica aharoni Kiel & Taviani, 2017, or other Italian Miocene species of Archivesica.

Upper Oligocene (upper Chattian) to Lower Miocene (Aquitanian), northern Italy.