Family Anomiidae

Shell size to 40 mm; shell with irregular outline, surface sculpture of rough radial riblets. Byssal opening present in juvenile individuals, closed in adults. Color brown, tan, white, yellowish, purple, or lavender. Differs from the more ubiquitous Common Jingle, Anomia simplex, by the more rough-looking shell, almost completely devoid of nacre (mother-of-pearl).

Shell size to 52 mm; shell with irregular outline. Upper valve convex, strong, lower valve flat, delicate, with byssal opening near hinge. Color white, yellow, orange, silvery-gray, or blackish. Byssus is calcified and may be seen as small elongated-elliptical "columns" inside dead shells of other species (see second image).