Description: Shell profile is sub-rhomboidal to elliptical in outline. Shell rather delicate with a maximum length of approximately
55 mm (2¼ inches). Anterior margin broadly rounded while posterior margin is pointed and terminates near the posterior-ventral
margin. Ventral margin is straight to slightly arcuate. Umbos positioned anterior of the middle of the valves and elevated to or just
slightly above the hingeline. Posterior ridge is sharply developed with well developed plications present on the posterior slope.
Pseudocardinal teeth are short and triangular while lateral teeth are slightly curved. The periostracum is yellow with fine, broken
rays radiating from the umbo to the margin of the shell. Nacre color typically white.