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 Introduced species found in disturbed habitats with high, sculptured, light-colored shells. Adults usually larger than 12mm, operculum corneous and paucispiral. As a parthenogenic species, males are extremely rare.
Tolerance unknown
Distribution CA, UT, NV, AZ