Genus Cyclonaias
Class Bivalvia
: Subclass Paleoheterodonta
: Genus Cyclonaias
Cyclonaias tuberculata (Purple Wartyback)
The purple wartyback mussel has a rounded, thick shell with a yellowish-green to brown surface. It grows to five inches in length. There are many wavy ridges across the umbo. The surface is covered with tubercles on the posterior three-quarters.
This species occurs in gravel or mixed sand and gravel in medium to large rivers throughout Illinois.
Conservation status: Threatened in Illinois.
Taxonomy: Order Unionoida, Superfamily Unionoidea, Family Unionidae, Subfamily Ambleminae.
Collection of the Illinois State Museum, photograph by Robert Warren
ISM Accession #: 679862
Class Bivalvia
: Subclass Paleoheterodonta
: Genus Cyclonaias
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