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. 4 [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): 184 [details] Available for editors [request]
From editor or global species database
Type locality Wheatland County (unnamed locality), Montana, United States; Judith River Formation, Campanian, late Cretaceous [details]