California Department of Fish and Wildlife
Aquatic Biological Assement

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Carabidae Level 1 Level 2






Key Characters (adult)

Ground beetles. Very diverse group, mainly terrestrial. Omophron (pictured) is semiaquatic, living in sandy stream margins; a few intertidal forms plus many riparian taxa. Adults vary greatly in size; notopleural suture present; first ventrite divided by hind coxae; large hind trochanters; legs not modified for swimming.

Key Characters (larva)

Larvae with 6-segmented legs and 1-2 apical claws; generally 10 abdominal segments; urogomphi variously developed; 10th abdominal segment may serve as a proleg in some forms.

Tolerance unknown
Distribution CA, OR, WA, NV, AZ, Baja