Southwest Florida Shells with Emphasis on Sanibel & Captiva
José H. Leal
(G.B. Sowerby III, 1914)
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.