Traits taxon details
original description
Meek, F. B. (1876). A report on the invertebrate Cretaceous and Tertiary fossils of the upper Missouri country. In: Hayden, F.V. (Ed.) Report of the United States Geological Survey of the Territories. 9: lxiv + 1–629, 45 pls., available online at https://www.biodiversitylibrary.org/page/2024294 page(s): 591-592, textfigs 81-83 [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): 190 [details] Available for editors 
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