"Shell small, orbicular, equiconvex, equilateral, translucent, up to ca. 9 mm high, auricles nearly equal in size, umbonal angle about 90°. Prodissoconch ca. 110 pm in height. Left valve smooth, glossy, with minuscule antimarginal scratches and commarginal lirae near anterior margins of auricle and disc. Microscopic sculpture lacking near posterior and ventral margins. Anterior and posterior auricles gradually transitionally developed into disc without demarcating disc flanks. Hinge line nearly straight, antero-dorsal margin slightly raised. Auricular crura without dorsal and intermediate teeth. Resilifer wide triangular. Right valve with similar microsculpture to that of left valve. Anterior auricle prominent, somewhat curved, with four irregularly arranged radial riblets bearing fine gemmae where they are crossed by the fine commarginal lirae. Byssal fasciole rather broad; byssal notch weakly indented; ctenolium well developed on suture, functional segment with 10 small teeth (active ctenolium). Exterior translucent cream, with white tent-shaped maculations; soft parts dark brown." {fide Dijkstra & Southgate, 2000) Size: Normal adult size range is 6 to 9 mm.

Type Locality: Coral reef lagoon off Koumac, New Caledonia.
Distribution: Known from Fiji, Kiribati, New Caledonia, the Solomon Islands and northern Queensland, Australia.
Habitat: Littoral zone, amongst algae and soft bottoms.