Southwest Florida Shells

José H. Leal

Geukensia granosissima

(G.B. Sowerby III, 1914)

Family Mytilidae

Southern Ribbed Mussel

Shell size to 75 mm; Shell mussel-shaped, thin but strong. Sculpture of numerous bifurcating ribs. No hinge teeth. Color yellowish- to greenish-brown, inner surface bluish-white with posterior end (rounded area) flushed with purple. Species found on hard substrates in the back bay areas of Southwest Florida.

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