Genus Truncilla
Class Bivalvia
: Subclass Paleoheterodonta
: Genus Truncilla
Truncilla donaciformis (Fawsfoot)
The interior of the fawnsfoot mussel shell has posteriorly iridescent white nacre. The pseudocardinal teeth are small, but roughened and elevated. The lateral teeth are long, thin, and straight to somewhat curved. The beak cavity is relatively shallow.
Collection of the Illinois State Museum, photograph by Karen Little
ISM Accession #: 678534
Class Bivalvia
: Subclass Paleoheterodonta
: Genus Truncilla
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