original description
Meek, F.B.; Hayden, F.V. (1860). Descriptions of new Organic Remains from the Tertiary, Cretaceous and Jurassic Rocks of Nebraska. <em>Proceedings of the Academy of Natural Sciences of Philadelphia.</em> 12: 175-185., available online at https://www.biodiversitylibrary.org/page/1801632
page(s): 176 [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): 118 [details] Available for editors
[request]
basis of record
Russell, L.S. (1964). Cretaceous Non-marine Faunas of Northwestern North America. <em>Royal Ontario Museum and University of Toronto, Life Sciences, Contributions.</em> 61: 1-24., available online at https://www.biodiversitylibrary.org/page/36250220 [details] Available for editors
[request]
additional source
Johnston, P.A.; Hendy, A.J.W. (2005). Paleoecology of Mollusks from the Upper Cretaceous Belly River Group. In: Currie, P.J.; Koppelhus, E.B. (eds) Dinosaur Provincial Park: a spectacular ancient ecosystem revealed. Indiana University Press, Bloomington, pp. 139-166.
page(s): 142 [details] Available for editors
[request]
From editor or global species database
Type locality "Near the mouth of Grand River on the Upper Missouri", Montana, USA; Judith River Fm., Campanian, Late Cretaceous [details]