California Department of Fish and Wildlife
Aquatic Biological Assement

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Georissidae Level 1 Level 2

Georissidae

Adults:

Larvae:

 

Key Characters (adult)

Minute mud-loving beetles Adults live at stream and lake margins. The adults camouflage themselves with sand and mud. This cover is usually shed when the beetles are captured. Head strongly deflexed, not visible from above; scutellum indistinct; metacoxae widely separated.

Key Characters (larva)

Larvae live in the soil above and at water line in the same habitats as the adults. Abdomen with 10 distinct abdominal segments; no spiracular atrium, symmetrical labroclypeal margin; legs short, stout and 3-segmented.

Tolerance unknown
Distribution CA