California Department of Fish and Wildlife
Aquatic Biological Assement

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Sialidae Level 1 Level 2

Sialidae

 

Key Characters

7 pairs of 4-to-5 segmented lateral filaments on abdominal segments 1-7. Single long caudal filament. 25mm or smaller. Sialis only genera in CA
Tolerance 4
Distribution CA, OR, WA, NV