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




Key Characters Elongated, flattened and leaflike, or cylindrical-shaped body with a single opening. Preserved specimens often have pharynx extruded.
Tolerance 1-4
Distribution CA, OR, WA, NV, AZ, Baja