original description
Meek, F.B.; Hayden, F.V. (1856). Descriptions of New Species of Acephala and Gastropoda, from the Tertiary formations of Nebraska Territory, with some general remarks on the Geology of the country about the sources of the Missouri River. <em>Proceedings of the Academy of Natural Sciences of Philadelphia.</em> 8: 111-126., available online at https://www.biodiversitylibrary.org/page/1935165
page(s): 119 [details]
additional source
Henderson, J. (1935). Fossil non-marine Mollusca of North America. <em>Geological Society of America Special Papers.</em> 3: 1-313.
page(s): 264 [details] Available for editors [request]
additional source
La Rocque, A. (1960). The molluscan faunas of the Flagstaff Formation of central Utah. <em>Geological Society of America Memoirs.</em> 78: 1-100., available online at https://doi.org/10.1130/MEM78-p1
page(s): 41, pl. 2, figs 33-35 [details] Available for editors [request]
From editor or global species database
Type locality Buford ("Three miles above Fort Union"), North Dakota, United States; Fort Union Formation, Paleocene [details]