Traits name details
original description
Stanton, T.W.; Hatcher, J.B. (1905). Geology and paleontology of the Judith River beds. <em>United States Geological Survey Bulletin.</em> 257: 1-123., available online at https://pubs.usgs.gov/bul/0257/report.pdf page(s): 108, pl. 12, figs 2-4 [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): 87 [details] Available for editors 
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