California Department of Fish and Wildlife
Aquatic Biological Assement

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Lymnaeidae

 

Key Characters The CA Lymnaeidae include the genus Lymnaea, which has a dextral shell and lacks an operculum, and two families of limpets with distinctive patelliform (flattened cup-shaped) shells, which also do not have an operculum. In the limpets, the shell apex is centrered relative to a median line drawn from aterior to posterior.
Tolerance unknown
Distribution CA, OR, WA, UT, NV, AZ, Baja