spiny riversnail
- kingdom: Animalia
- phylum: Mollusca
- class: Gastropoda
- order:
- family: Pleuroceridae
- genus: Io
- species: Io fluvialis
Bridgeport
Alabama- Kingston
- Knoxville
- Sneedville
- Surgoinsville
Tennessee- Dryden
- Jonesville
Virginia
United States