Shell small, up to ~ 40 mm in length and ~
30 mm in width, with an oval to subtriangular outline,
depending upon substratum and available space. Hinge line
is straight, short, with the ligament occupying its total length.
Ligamental area short. The external surfaces of both left and
right valves are white to lilac with a dark purple coloration
at the shell margin. White radiating stripes occur on the right
valves of some specimens