This is a demonstration of the ISM freshwater mussel image gallery.
Class Bivalvia : Subclass Paleoheterodonta : Genus Ellipsaria
Ellipsaria lineolata (Butterfly)
The interior of the butterfly mussel shell has thick, white nacre that is iridescent toward the posterior end. The pseudocardinal teeth are rather large, divergent, and serrated. The lateral teeth are serrated and straight. The beak cavity is shallow.
Collection of the Illinois State Museum, photograph by Robert Warren
ISM Accession #: 677080
Class Bivalvia : Subclass Paleoheterodonta : Genus Ellipsaria
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