original description
Stanton, T.W. (1916). Nonmarine Cretaceous invertebrates of the San Juan Basin. <em>United States Geological Survey Professional Paper.</em> 98-R: 309-326., available online at https://pubs.usgs.gov/pp/0098r/report.pdf
page(s): 319, pl. 83, figs 12-13 [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): 261 [details] Available for editors [request]
From editor or global species database
Type locality Locality 27, along Cottonwood Arroyo, San Juan County, New Mexico, United States; Fruitland Formation, late Campanian, late Cretaceous [details]