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Southwest Florida Shells with Emphasis on Sanibel & Captiva

By José H. Leal

Family Tornidae

Cyclostremiscus pentagonus

(Gabb, 1873)

Trilix Vitrinella

Shell to 2.2 mm in size, flattened, compressed, but with spire projecting in early whorls, sculpture of microscopic growth lines, umbilicus open, aperture oblique in relation to shell axis. Last whorl in cross-section has a pentagonal shape. Base with two main spiral ridges. Shell color translucent, clear. The shell illustrated was collected in 2008 by former Museum collection volunteer Lois Dunnam on the East End of Sanibel.