Optioservus quadrimaculatus
- kingdom: Animalia
- phylum: Arthropoda
- class: Insecta
- order: Coleoptera
- family: Elmidae
- genus: Optioservus
- species: Optioservus quadrimaculatus
Lumby- Salmon Arm
British Columbia
Canada
Big Pine- Pasatiempo
- Yosemite Valley
California- Pullman
Washington
United States