Hartmann, J.H. 1998. The biostratigraphy and paleontology of Lastest Cretaceous and Paleocene freshwater bivalves from the Western Williston Basin, Montana, U.S.A. [in] P.A. Johnston & J.W. Haggart, eds. Bivalves: An Eon of Evolution: 317-345.
+ Unio vetusta ‘Meek’ of Authors
+ Unio browni Whitfield, 1903