Shell length to 55 mm; juvenile specimens are ovate and cardiiform, while mature shells are heavy and posteriorly angulate. Sculpture: approximately 32 ribs with close, flat, squarely angulate nodules which are crowded and squamate marginally; interstices of the same width, with raised concentric lirae. Colour: white, with two areas of red-brown anterior and posterior to the umbones; ribs sparsely spotted with pink; umbones white; interior white, brown poslero-ventrally. Periostracum: thick, flaky, pink-brown in colour. Habitat: sand and shell debris to 60 metres. Distribution: Victoria, New South Wales to central Queensland.