Parvamussium, Sacco, 1897

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 : 461

Parvamussium ? aff. scitulum ( Smith, 1885)

Fig. 16A, B .

Material.— One valve, SMF373093 ; one valve, SMF376540 ; one valve, SMF373094 . Northern Indian Ocean, Krishna-Godavari Basin , Bay of Bengal, offshore eastern India, 15°51.6335’ N, 81°50.2274’ E, 1046 m water depth, 16.18– 16.28 mbsf level, core NGHP-01-12A; Upper Pleistocene. For additional material see Table 1 .

Description.—Small fragile, thin, flat, pectiniform shell. Right valve flattened with regular commarginal growth lines and microscopic radial etchings; large anterior auricle with irregular growth lines and deep byssal notch; smaller posterior auricle. Left valve flattened smooth with irregular growth lines; large anterior auricle without byssal notch; smaller posterior auricle. Largest incomplete valve diameter 14 mm.

Remarks.— Parvamussium scitulum was reported from the South-West Indian Ocean ( Dijkstra and Maestrati 2015) and the Red Sea ( Dijkstra and Janssen 2013). Our species has a similar sculpture and outline but it is larger and margins of the auricles are aligned with anterior and posterior margins; the auricles of Parvamussium scitulum end at an angle to the dorsal margins. We refrain from describing a new species on the basis of our fragmentary material.

Figures

Fig. 16. Propeamussiid bivalves from core NGHP-01-12A, Krishna- Godavari Basin, offshore eastern India. A, B. Parvamussium? aff. scitulum (Smith, 1885). A. SMF373093, left valve external view. B. SMF376540, left valve external view. C–F. Propeamussiidae? gen. et sp. indet. C. SMF373091, left valve external view. D. SMF373092, partial right valve external view. E. SMF373089, partial right valve, external view. F. SMF373090, partial right valve, internal view.