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Glycymeris grayana (Dunker, 1857)

Description: Shell solid, heavy, equivalve, slightly inequilateral. Shape subovate, wider than high, slightly extended posteriorly. Anterior and posterior ends smoothly rounded. Umbones low, a little forward of midline. Hinge line curved, about 8 teeth each side, area between smooth or with a few weak teeth. Ligament in a wide, triangular pit above hinge. Interior white, irregularly marked with brown; muscle scars well defined with a ridge from inner edge of scars towards umbones, stronger on posterior side; margin strongly denticulate. Exterior smooth apart from irregular concentric growth lines; no radial sculpture. Periostracum velvety, restricted to ventral margin. Shell patterned with brown in zigzag lines or radial bands, variable in strength, sometimes almost absent.

Size: Up to 58 mm in length.

Distribution: Moreton Bay, southern Queensland, southwards to Apollo Bay, western Victoria.

Habitat: Lives in sand and gravel in the shallow subtidal. Common as beach wash-up and down to about 80 m.

Comparison: See G. holoserica.

Synonymy: Even though it is the better known name, Glycymeris flammea Reeve, 1843 is a previously established synonym.

Fig. 1: Twofold Bay, NSW (C.118863)


Copyright Des Beechey 2023