Cylichnidae Adams & Adams, 1854

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

Family Cylichnidae Adams & Adams, 1854 Cylichnidae ? gen. et sp. indet.

Fig. 12D .

Material.— One shell ( SMF373106 ) from Northern Indian Ocean, Krishna-Godavari Basin , Bay of Bengal, offshore eastern India, 15°51.6335’ N, 81°50.2274’ E, 1046 m water depth, 16.88 mbsf level, core NGHP-01-12A; Upper Pleistocene .

Description.—Small elongated, convolved shell, cylichnid shape. Protoconch not seen, intorted. Teleoconch, ultimate whorl only, smooth with fine curved growth lines. Outline ovate, slightly angular, maximum convexity apically, periphery weakly convex. Aperture elongated ovate, widening abapically, narrow adapically.

Remarks.—The single shell is poorly preserved for a detailed description and consequently the family-level placement is uncertain.

Figures

Fig. 12. Heterobranch gastropods from Upper Pleistocene seep deposits from core NGHP-01-12A, Krishna-Godavari Basin, offshore eastern India. A. SMF373103, Eulimella sp. 1, lateral view (A1, A2). B. SMF373104, Eulimella sp. 2, lateral view. C. SMF373105, Odostomia sp., lateral view (C1, C2). D. SMF373106 Cylichnidae? gen. et sp. indet, lateral view (D1, D2). H, height.