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 Posess a paucispiral operculum, similar to that found in Pleuroceridae and Hydrobiidae, but are distinguished from these families by their small size (adults are usually no larger than a few mm).
Tolerance unknown
Distribution CA, OR, WA, UT, NV, AZ