Shell small, ovate, thin and compressed Umbo in the center, elevated and pointed. Anterior margin rounded, posterior margin is wedge-shaped, attenuated, compressed, flexuous and angular. Dorsal margin stright on anterior side but flatly depressed on posterior side. Pallial sinus large and arched on the anterior end and touching the anterior adductor scar. Two cardinals present in each valve. Laterals absent in the left valve but a weak posterior lateral and strong anterior lateral are present in the right.