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Southwest Florida Shells with Emphasis on Sanibel & Captiva
José H. Leal
Family Modulidae
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Modulus modulus
(Linnaeus, 1758)
Button Snail
Shell size to 18 mm; shell with low spire, large body whorl. Sculpture extremely variable, with strong radial cords and axial ridges. Outer lip with internal ridges. Color grayish-white to reddish-brown.
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