original description
Russell, L.S. (1934). New fossil fresh-water Mollusca from the Cretaceous and Paleocene of Montana. <em>Journal of the Washington Academy of Sciences.</em> 24: 128-131., available online at https://www.biodiversitylibrary.org/page/39918518
page(s): 131, fig. 5 [details] Available for editors [request]
basis of record
Henderson, J. (1935). Fossil non-marine Mollusca of North America. <em>Geological Society of America Special Papers.</em> 3: 1-313.
page(s): 222 [details] Available for editors [request]
source of synonymy
Hartman, J.H.; Roth, B. (1998). Late Paleocene and Early Eocene Nonmarine Molluscan Faunal Change in the Bighorn Basin, Northwestern Wyoming and South-Central Montana. In: Aubrey, M.-P.; Lucas, S.G.; Berggren, W.A. (eds) Late Paleocene–Early Eocene Biotic and Climatic Events in the Marine and Terrestrial Records. Columbia University Press, pp. 323-379.
page(s): 336 [details]
From editor or global species database
Type locality Eagle coal mine, Bear Creek, Carbon county, Montana, United States; Clarkforkian (zone Cf1), Thanetian, late Paleocene [details]