Marine bivalve mollusc. Bivalve shell, semi-thick. Its dorsal border is angular in the central portion, while the ventral border is almost straight. Umbos are sharp and are slightly inclined. The outer surface has only concentric growth grooves and is covered with a periostracum, smooth, blackish to violet brown. Inside the hinge has 3 to 4 equal tooth, visible generally to the naked eye or with little increase. The interior is white and the edge is pearly silver blue. They reach sizes of approximately 85 mm in length.