Genus Pyganodon
Class Bivalvia
: Subclass Paleoheterodonta
: Genus Pyganodon
Pyganodon grandis (Giant Floater)
The giant floater mussel has a large, thin shell that has a smooth surface and a yellowish-green color. The anterior end is rounded, while the posterior is squared. It grows to ten inches in length. This species lives in the mud-bottom of ponds, lakes, and sluggish pools of creeks and rivers. It occurs across Illinois.
Conservation status: widespread and common
Taxonomy: Order Unionoida; Superfamily Unionoidea; Family Uniodae; Subfamily Anodontinae
Collection of the Illinois State Museum, photograph by Robert Warren
ISM Accession #: 673857
Class Bivalvia
: Subclass Paleoheterodonta
: Genus Pyganodon
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