original description
White, C.A. (1895). Notes on the invertebrate fauna of the Dakota formation, with description of new molluscan forms <em>Proceedings of the United States National Museum</em>. 17: 131-138, available online at https://www.biodiversitylibrary.org/page/15675129
page(s): 135, pl. 8, figs 11-12 [details]
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): 168 [details] Available for editors [request]
From editor or global species database
Type locality 5 miles west of north from Fairbury, about 1 mile from the Little Blue River, Jefferson County, Nebraska, United States; Dakota Formation, Cenomanian, late Cretaceous [details]