The overall shape is trigonal ovate. The posterior margin is slightly more pointed than the anterior margin. The anterior dorsal margin is straight, and the posterior dorsal margin is subconvex. The valves are equal in size and shape (equivalve), and there is no gape when they are closed. Sculpture consists of growth lines and comarginal ribs that are more prominent ventrally. The lunule is lightly impressed, defined by a fine shallow groove and extends 2/3 of the anterior dorsal margin. The commissural margin is lightly raised at the center of the lunule, but does not extend above the shell flank. The umbo is anterior and the beaks point slightly anteriorly. The escutcheon is not well defined.
The external surface is white and typically has light brown coloration or tent marks. The umbo and posterior dorsal margin may also be marked by brown coloration. The interior is white with a ray of brown pigmentation at the posterior.
The ligament is external, extends 1/4 of the posterior dorsal margin and is supported by nymphal ridges. On the left valve, there are three cardinal teeth: the anterior (2a) and posterior (4b) are not bifid, and the central tooth (2b) is lightly bifid. The anterior (2a) and central (2b) teeth are joined dorsally, creating an inverted "V" shape. The posterior tooth (4b) is fused with the nymph. There is also one anterior lateral tooth (A2) on the left valve. On the right valve, there are three cardinal teeth: the anterior (3a) and central (1) teeth are not bifid, and the posterior tooth (3b) is bifid. The central tooth (1) is more prominent than the other teeth. There are also two anterior lateral teeth (A1, A3) on the right valve. There are fine, elongate oblique crenulations on the anterior, ventral and posterior margins. The adductor muscle scars are similar in area, but the anterior is slightly more elongate than the posterior, which is rounder. The pallial sinus is rounded and extends to the posterior end of the nymph in length.