Frierson, 1914 – North America
Simpsonaias ambigua (Say, 1825)
INHS 20618. Kankakee River, Will County, Illinois.
Type Species: Alasmodonta ambigua Say, 1825
Simpsonaias ambigua (Say, 1825)
INHS 20618. Kankakee River, Will County, Illinois.
Type Species: Alasmodonta ambigua Say, 1825