California Department of Fish and Wildlife
Aquatic Biological Assement

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

Perlodidae Level 1 Level 2



Key Characters

Paraglossae much longer than glossae, tips of paraglossae are pointed. Branched thoracic gills almost always absent. May have simple fingerlike gills beneath head or on the thorax. Cerci longer than length of abdomen.

Tolerance 0-2
Distribution CA, OR, WA, NV, AZ, Baja