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Southwest Florida Shells with Emphasis on Sanibel & Captiva

By José H. Leal

Family Tornidae

Pleuromalaxis balesi

Pilsbry & McGinty, 1945

Bales Vitrinella

Originally described from the Florida Keys and east coast of Florida and Florida Keys this is another member of the microgastropod family Tornidae found along the coast of Southwest Florida. Larger shells of the species reach only 1.8 mm (about 0.06 inch). As with many vitrinellas, its shell is disk-shaped, compressed, but the whorl profile in this species is squarish (edges of shell in side view). The shell sculpture consists of fine spiral lines and strong, widely spaced radial ribs. The color is whitish or partially translucent. The shell illustrated was collected in 2002 by Lois Dunnam, on Sanibel Island. Photos by James F. Kelly.