Hickorynut mussel
- kingdom: Animalia
- phylum: Mollusca
- class: Bivalvia
- order: Unionida
- family: Unionidae
- genus: Obovaria
- species: Obovaria olivaria
Metropolis- Rock Island
Illinois- Lafayette
- West Lafayette
Indiana- Davenport
Iowa- Topeka
Kansas- Hannibal
Missouri
United States