Distinguishing Characteristics |
Bivalve (2 shells); shell ovate, inflated, anterior end rounded, posterior end more angular with nearly straight upper margin; color white, protective covering (periostracum) brown, hairy; interior white, margins crenate (scalloped); flattened radial ribs with fine concentric grooves crossing ribs and in between ribs; hinge margin straight on top, slightly curved on bottom; hinge area wide, beak twisted toward posterior end; posterior end with ridge from beak to posterior margin; posterior abductor muscle scar with raised ridge. |
Similar Species |
The flattened ridged posterior end and raised ridge on the posterior muscle distinguish this ark. |
Habitat |
Gulf and bay, sandy bottoms |
Maximum Size |
7.6 cm (3 in) |
Other Common Names |
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Previous Scientific Names |
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