Russell. 1934. Journal of the Washington Academy of Science 24.
(homonym of Unio declivis Say, 1831; intro'd as intra-sp. of Unio senectus White, 1877)
Russell, 1934. J. Washington Acad. Sci. 24: 129, fig. 3.
Russell, 1934. J. Washington Acad. Sci. 24: 128, figs. 1-2.