California Department of Fish and Wildlife
Aquatic Biological Assement

California Digital Reference Collection Home | Family Level | Level 1 Taxonomy | Level 2 Taxonomy

Jump to:

Ephemeroptera Odonata Plecoptera Hemiptera Megaloptera Neuroptera Trichoptera Lepidoptera Coleoptera Diptera Non-Insects

Rhyacophilidae Level 1 Level 2

Rhyacophilidae

 

Key Characters

Meso- and metanotum membranous. Abdominal segment IX with dorsal, sclerotized plate, most of anal proleg free from segment IX. Larvae free-living ("primitive caddisflies"), predominantly predaceous. Prefer cool, flowing waters.
Tolerance 0-2
Distribution CA, OR, WA, NV, AZ