California Department of Fish and Wildlife
Aquatic Biological Assement

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Margaritiferidae

 

Key Characters Elongated, laterally compressed shell with external ligament, epidermis dark brown to black, 80 to 175 mm. Margaritifera falcata is the only known species in CA.
Tolerance unknown
Distribution CA, OR, WA, UT, NV, AZ, Baja