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Southwest Florida Shells with Emphasis on Sanibel & Captiva

By José H. Leal

Family Donacidae

Donax variabilis

Say, 1822

Variable Coquina

Shell size to 20 mm; shell wedge-shaped or trigonal. Sculpture of delicate concentric growth lines, and radial striations that become stronger toward posterior end of shell. Ligament external. Margins crenulated. Color white, yellow, bluish, purple, mauve, pink with rays of darker tones. Intertidal on sandy beaches.