Genus Pleurobema
Class Bivalvia
: Subclass Paleoheterodonta
: Genus Pleurobema
Pleurobema plenum (Rough Pigtoe)
The rough pigtoe mussel shell is triangular in shape, thick, and inflated. The umbos are prominently inflated and elevated. The surface has a satin texture of yellowish brown. It grows to four inches in length. This species lives in the sand or gravel of medium to large rivers. It has occurred on the Wabash River in Illinois.
Conservation status: federally endangered
Taxonomy: Order Unionoida; Superfamily Unionoidea; Family Unionidae; Subfamily Ambleminae
Collection of the Illinois State Museum, photograph by Karen Little
ISM Accession #: 677194
Class Bivalvia
: Subclass Paleoheterodonta
: Genus Pleurobema
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