Tropisternus californicus
- kingdom: Animalia
- phylum: Arthropoda
- class: Insecta
- order: Coleoptera
- family: Hydrophilidae
- genus: Tropisternus
- species: Tropisternus californicus
Carmel-by-the-Sea- Los Angeles
- Mojave
- Santa Monica
California- Port Townsend
Washington
United States