California Department of Fish and Wildlife
Aquatic Biological Assement

California Digital Reference Collection Home | Family Level | Level 1 Taxonomy | Level 2 Taxonomy

Jump to:

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



Key Characters Common, medium-sized to large snails (adults 20mm or more in length), shell globulose to turreted, operculum corneous and concentric.
Tolerance unknown
Distribution CA, OR, WA