Henderson. 1929. Non-marine Mollusca of Oregon and Washington. The University of Colorado Studies 17(2): 47-190.
Henderson, 1929. Univ. Colo. Stud. 17(2): 53.
Henderson, 1935. GSA, Spec. Pap. 3: 68.
Haas, 1940. Zool. Ser. Field Mus. Nat. Hist. 24: 119.
Type genus: Margaritifera Schumacher, 1815 = Margaritifera