Shell up to ca. 60 mm high, solid, compressed, elongate, nearly equivalve and equilateral, right valve slightly more convex than left valve, auricles short and subequal, umbonal angle ca. 85 degrees, colour creamy, maculated with reddish dots and streaks, right valve somewhat paler.

 Both valves radially undulated and sculptured with 6 prominent lirae, laterally an additional but weakly developed ridge. Interstices somewhat narrower than lirae. Secondary radial sculpture of small lirae (on right valve weaker) on the lirae and interspaces, commence on the central part of the disc and extend to the ventral margin. Microsculpture of closely spaced commarginal lamellae throughout. Anterior auricles very weakly sculptured with ca. 10 riblets, posterior auricles nearly smooth. Inner surface plicated. Byssal notch, byssal fasciole and functional ctenolium lacking.