Traits name details
original description
Cockerell, T. D. A. (1914). Tertiary Mollusca from New Mexico and Wyoming. <em>Bulletin of the American Museum of Natural History.</em> 33: 101-107. page(s): 105-106, pl. 10, figs 4-6 [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): 92 [details] Available for editors 
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