Santa Barbara Museum of Natural History

    • Home/Overview
    • Checklists
    • Database
    • Fieldwork
    • Phylogeography
    • Photo Gallery
    • Species pages
    • Endangered beetles
    • Personnel
    • Informatics
    • Collaborators
    • Collection
    • Bibliography
    • Support the project
    • Beetle links

Funded in part by award DEB0447694 from the National Science Foundation to M. Caterino.

Last updated 01/16/2009

  California Beetle Project > Species Pages > Optiservus quadrimaculatus


Scientific name: Optiservus quadrimaculatus (Horn)
    Order Coleoptera
    Superfamily Byrrhoidea
    Family Elmidae

Images (click to enlarge)

What it looks like: 1.8-2.2 mm in length. Its body is robust and dark brown, with four large orange spots on the elytra, two over the shoulders and two towards the end of the abdomen. The entire body is hairy and the elytra have striae, shallow punctures that run in rows along their length.

Where you'll find it: These beetles are found in the streams of the Sierra Nevada and northeastern California.

Natural History: Both the larvae and adults of this species are found in the gravel of stream beds ranging in temperature from warm to very cool. Typically, they are not found at elevations higher than 6,000 feet.

This page was written by Maren Farnum, a 2005 California Beetle Project intern.

Exhibitions | Sea Center | Gladwin Planetarium | Education | Collections & Research
Members | Support SBMNH | About Us | Site Map
Your privacy is important - privacy policy © 2017 Santa Barbara Museum of Natural History