California Beetle Project > Species Pages > Optiservus quadrimaculatus
Scientific name: Optiservus quadrimaculatus (Horn)
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.