Bickel, D. (1976). Two new species of non-marine Mollusca from the Fort Union Group (Paleocene) of North Dakota and Montana. <em>The Nautilus.</em> 90(3): 94-98., available online athttps://www.biodiversitylibrary.org/page/8276464 page(s): 97, figs 5-8 [details]
Type locality Locality 4, Ball Butte, NE 1/4, SW 1/4, sec. 1, T. 140 N., R. 81 W., Burleigh County, North Dakota, United States; Fort Union Formation (Tongue River Member [Williston Basin]), Paleocene [details]
original descriptionBickel, D. (1976). Two new species of non-marine Mollusca from the Fort Union Group (Paleocene) of North Dakota and Montana. <em>The Nautilus.</em> 90(3): 94-98., available online athttps://www.biodiversitylibrary.org/page/8276464 page(s): 97, figs 5-8 [details]
Present Inaccurate Introduced: alien Containing type locality
Type locality Locality 4, Ball Butte, NE 1/4, SW 1/4, sec. 1, T. 140 N., R. 81 W., Burleigh County, North Dakota, United States; Fort Union Formation (Tongue River Member [Williston Basin]), Paleocene [details]
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