Fig. 13 in New taxa, records, and data for vesicomyid bivalves from Cenozoic strata of the North Pacific region

Fig. 13. The vesicomyid bivalve Hubertschenckia ezoensis (Yokoyama, 1890), from the upper Eocene Poronai Formation in Hokkaido, Japan. A. NRM Mo 204823, very large RV; external sculpture (A1) and hinge (A2) views. B. NRM Mo 204821, small articulated specimen; showing ligament (B1) and external ornament and posterior ridge (B2). C. NRM Mo 204824, internal mold of large RV, showing anterior adductor muscle scar; view on right valve (C1) and close-up on hinge area (C2). D. NRM Mo 204825, large articulated specimen, mostly an internal mold; view on right valve (D1) and left valve (D2). E. NRM Mo 204822, hinge of LV.