California Department of Fish and Wildlife
Aquatic Biological Assement

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Valvatidae

 

Key Characters Small (8mm or less) snails found in a number of different habitats. Shell with a depresed spire, operculum multispiral (vs. concentric operculum in Viviparidae). Valvata is the only genus in CA.
Tolerance unknown
Distribution CA, OR, WA, UT