Traits name details
original description
Meek, F.B. (1873). Preliminary paleontological report, consisting of lists and descriptions of fossils, with remarks on the ages of the rocks in which they were found, etc., etc. <em>United States Geological and Geographical Survey of the Territories, annual report.</em> 6: 431-541., available online at https://www.biodiversitylibrary.org/page/15677973 page(s): 512-513 [details]
additional source
Henderson, J. (1935). Fossil non-marine Mollusca of North America. <em>Geological Society of America Special Papers.</em> 3: 1-313. page(s): 108 [details] Available for editors 
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