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Southwest Florida Shells with Emphasis on Sanibel & Captiva

José H. Leal

Family Carditidae


Cardites floridanus

(Conrad, 1838)

Broad-ribbed Carditid

Shell size to 40 mm; shell thick, solid, heavy, ovate. Sculpture of about 15-20 thick radial ribs crossed by concentric lines, which gives scaly appearance to ribs. Umbos close together. Lunule small. Color yellowish-white with blotches of reddish purple to brown. Interior white. Attaches by byssus to hard substrates. Common on mud flats. The yellow-tinged white shell, is infrequently found in the barrier islands of Collier County. This shell was collected by Amy Tripp on Kice Island. The composite image to the right shows a juvenile specimen measuring about 9 mm.

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