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Southwest Florida Shells with Emphasis on Sanibel & Captiva
José H. Leal
Family Mytilidae
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Modiolus squamosus
Beauperthuy, 1967
Southern Horse Mussel
![](http://res.cloudinary.com/bailey-matthews-shell-museum/image/upload/v1429558961/hyaccdmoa1ijfsttmcxi.jpg)
Shell size to 65 mm; shell similar to Modiolus americanus, but with umbones smaller and not swollen, and coarse, thick, brown periostracum with long filaments. Color brownish with oblique whitish ray on older specimens; umbones white.
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