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NOTE: As of 2014, the California Beetle Project page is no longer updated. The original database and list of California beetles in the menu on the left will remain for the time being, but the information contained within is not necessarily current. SBMNH Entomology Curator Matthew L. Gimmel has divided up the function of the original database into two conceptual halves:

  1. The SBMNH Entomology specimen-level database, including all SBMNH beetle specimens included in the CBP database, which is now available (and ever-growing) through the ecdysis portal at https://serv.biokic.asu.edu/ecdysis/

  2. A literature- (and available specimen-)based checklist.
  3. of the Coleoptera of California, which is being revised and re-compiled by Dr. Gimmel, and, as of January 2017, is about 85% complete.




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Last updated 01/16/2009

 California Beetle Project > Species Pages > Narpus angustus

Classification

Scientific name: Narpus angustus Casey
    Order Coleoptera
    Superfamily Byrrhoidea
    Family Elmidae

Images (click to enlarge)

What it looks like: 3-4 mm in length. Its body is dark brown with striae, or shallow punctures, running the length of its elytra. The rows of striae alternate with rows of light brown, short hairs.

Where you'll find it: This beetle is found throughout the coastal California mountain ranges, in large, clear, rapid streams.

Natural History: These beetles are abundant where bars of coarse gravel drop off into deep pools. Both the adults and the larvae are aquatic.

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




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