Traits taxon details
original description
Yen, T.-C. (1954). Nonmarine Mollusks of Late Cretaceous Age From Wyoming, Utah and Colorado. Part 1: A fauna from western Wyoming. <em>United States Geological Survey Professional Paper.</em> 254-B: 45-59. page(s): 50-51, pl. 17, fig. 50 [details] Available for editors 
basis of record
Roth, B. (1986). Land mollusks (Gastropoda: Pulmonata) from Early Tertiary Bozeman Group, Montana. <em>Proceedings of the California Academy of Sciences.</em> 44(11): 237-267., available online at https://www.biodiversitylibrary.org/page/16005679 page(s): 261 [details] Available for editors 
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