This is a demonstration of the ISM freshwater mussel image gallery.
Class Bivalvia : Subclass Paleoheterodonta : Genus Pleurobema
Pleurobema rubrum (Pyramid Pigtoe
The interior of the pyramid pigtoe mussel shell usually has pink nacre, or occasionally has, as in this specimen, white nacre. The pseudocardinal teeth are large and the lateral teeth are curved. The beak cavity is deep.
Collection of the Illinois State Museum, photograph by Karen Little
ISM Accession #: 680132
Class Bivalvia : Subclass Paleoheterodonta : Genus Pleurobema
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