Elephantear (Elephant's Ear)
Shell thick, solid, compressed to moderately inflated, triangular. Anterior end rounded, posterior end pointed. Dorsal margin slightly curved, ventral margin curved in young shells, becoming straight in older shells. Umbos low, usually not elevated above the hinge line. Beak sculpture, if visible, of two or three loops parallel to the growth lines, usually present only in very small shells. Posterior ridge prominent and sharply angled. Surface of the shell smooth. Periostracum reddish brown with faint green rays in small shells, becoming dark brown to black in adults.
Pseudocardinal teeth well developed; two in the left valve, one in the right. Lateral teeth short, roughened, and straight. Beak cavity very shallow. Nacre color variable, usually purple, occasionally pink or white.
Similar species: Spike, mucket