Acharax Dall, 1908a

Little, Crispin T. S., Kumar, Rajendar, Johnson, Joel E. & Hoffman, Leon, 2025, Bathyal molluscs from Upper Pleistocene methane seeps in Krishna-Godavari Basin, offshore eastern India, Acta Palaeontologica Polonica 70 (3), pp. 443-477 : 457-458

Genus Acharax Dall, 1908a

Type species: Solemya johnsoni Dall, 1891 , by original designation; Recent , Baja California .

Acharax sp.

Fig. 13A .

Material.— One shell ( SMF373102 ) from Northern Indian Ocean, Krishna-Godavari Basin , Bay of Bengal, offshore eastern India; 15°51.8647’ N, 81°50.0709’ E, 1050 m water depth, 15.54 mbsf level, core NGHP-01-10D; Upper Pleistocene. For additional material see Table 1 .

Description.—Large elongated, oblong, thick solemyid shell. Prodissoconch inconspicuous. Dissoconch flattened, oblong with coarse irregular growth lines, irregular radial lines from umbo towards antero-ventral margin. Outline blunt marginally protruding umbo, straight antero-dorsal margin, postero-dorsal marging slightly concave. Anterior and posterior ends most convex, ventral margin weakly convex. External ligament groove present. Maximum length of fragmented shell 34 mm.

Remarks.—Our material is too poorly preserved to conclusively compare with a described species or describe it as new. It is placed in Acharax because of presence of an external ligament pit, but no sign of any internal ligament scars.

Order Nuculanida Carter et al., 2000

Figures

Fig. 13. Solemyid and nuculanid bivalves from Upper Pleistocene seep deposits from cores NGHP-01-12A and NGHP-01-10D, Krishna-Godavari Basin, offshore eastern India. A. Acharax sp. SMF373102, external views of partial right (A1) and left (A2) valves. B–D. Ledella favus Hoffman & Little sp. nov. B. SMF373071, paratype 2, internal view of left valve (B1), and detail of prodissoconch (B2). C. SMF373070, paratype 1, external view of right valve C1), and dorsal view (C2). D. SMF373069, holotype, external view of right valve (D1), and dorsal view (D2).