Physical Characteristics

Shell is elongated and ovate-triangular in shape, irregular and variable in outline, roughly sculptured with undulating concentric ridges. The left (cemented) valve more deeply cupped, right valve flattened, not gaping. Color is whitish to gray. Hinge teeth reduced, ligament strong. Interior is porcelain white with purple-stained muscle scar. Generally grows about 3 in (8 cm) in length, but specimens have been found as long as 14 in (36 cm). Soft body with central adductor muscle and unfused mantle margins.

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