Cuspidariidae, Dall, 1886

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 : 465-466

publication ID

https://doi.org/10.4202/app.01179.2024

persistent identifier

https://treatment.plazi.org/id/4019EF34-4E7A-FF82-CC09-FB0676623045

treatment provided by

Felipe

scientific name

Cuspidariidae
status

 

Cuspidariidae View in CoL ? gen. et sp. indet.

Fig. 20 View Fig .

Material.— One fragmentary valve ( SMF373084 About SMF ) 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 GoogleMaps .

Description.—Small fragile, flattened shell, inequilateral. Outline uncertain. Sculpture with fine radial and commarginal lines. Internal hinge with deep notch in external margin below the umbo, no teeth seen. Length about 3 mm.

Remarks.—Placement in Cuspidariidae is feasible from the external morphology and hinge. The radial sculpture suggests a species in the genus Cardiomya Adams, 1864 , albeit that our species has relatively flat valves and known species in the Indo-Pacific are rather globose. Alternatively, it could be placed in another genus in Cuspidariidae or Protocuspidariidae . The material was deemed inadequate for a determination, or description as a new species.

Class Scaphopoda Bronn, 1862 View in CoL

Order Dentalida Starobogatov, 1974

Family Dentaliidae Children, 1834 View in CoL

Dentaliidae View in CoL ? gen. et sp. indet.

Fig. 21A–C View Fig .

Material.— Three shells ( SMF373085–87 About SMF ) 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, 16.78 mbsf level, core NGHP-01-12A; Upper Pleistocene. For additional material see Table 1 GoogleMaps .

Description.—small, weakly curved, solid scaphopod toothshaped shell with strong axial rib sculpture. small, globose, solid inflated gadilid-shaped shell. Apex small, pointed with circular hole, rectangular outline. Intial strong increase in diameter, less thickening in adult stage. Sculpture with large rounded axial ribs, apically 4 ribs increasing to 9 ribs abapically with incremental ribs progressively formed in between. Maximum length 7 mm.

Remarks.—Placement in Dentaliidae is plausible from the external morphology and outline in the few fragmentary shells. They likely belong to a single species in the genus Antalis Adams & Adams, 1854 . Alternatively, they could be placed in another genus in Dentaliidae or in the genus Entalina Monterosato, 1872 , in family Entalinidae Chistikov, 1979 . The material was deemed inadequate for a determination, or description as a new species.

Kingdom

Animalia

Phylum

Mollusca

Class

Bivalvia

Family

Cuspidariidae

Loc

Cuspidariidae

Little, Crispin T. S., Kumar, Rajendar, Johnson, Joel E. & Hoffman, Leon 2025
2025
Loc

Dentalida

Starobogatov 1974
1974
Loc

Scaphopoda

Bronn 1862
1862
Loc

Dentaliidae

Children 1834
1834
Loc

Dentaliidae

Children 1834
1834
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