Traits name details
original description
Hanna, G.D. (1920). Fossil mollusks from the John Day Basin in Oregon, contained in the Condon Museum of the University of Oregon. <em>University of Oregon Publication.</em> 1(6): 1-18., available online at https://www.biodiversitylibrary.org/page/20825598 page(s): 5, pl. 1, figs 4a-b [details]
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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