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 Largely marine group, 1 freshwater Family in U.S. - Spongillidae, 170 species.Highly variable in size and growth form. "Skeleton" contains both spicules and spongin. Taxonomy difficult, considerable disagreement among specialists.
Tolerance unknown
Distribution CA, OR, WA, NV, AZ, Baja