California Department of Fish and Wildlife
Aquatic Biological Assement

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Siphlonuridae Level 1 Level 2



Key Characters

 Labrum lacking a median notch on distal margin, terminal filament subequal to cerci, antennae usually shorter than width of the head. Tibiae and tarsi not bowed,claws usually not long and slender. Gills large and well-developed.

Tolerance 7
Distribution CA, WA