This is a demonstration of the ISM freshwater mussel image gallery.
Class Bivalvia : Subclass Paleoheterodonta : Genus Plethobasus
Plethobasus cyphyus (Sheepnose)
The interior of the sheepnose mussel shell has white nacre that is sometimes tinged with pink or salmon. The pseudocardinal teeth are small. The lateral teeth are long and straight or curved. The beak cavity is shallow.
Collection of the Illinois State Museum, photograph by Karen Little
ISM Accession #: 677159
Class Bivalvia : Subclass Paleoheterodonta : Genus Plethobasus
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