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): 314, pl. 81, fig. 1 [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): 82 [details] Available for editors [request]
From editor or global species database
Type locality "At Bauer's locality 48, 25 miles south of San Juan River and 6 miles east of Chaco River, N. Mex. (locality 9288), about 150 feet above the base of the Fruitland formation", USA; Campanian, Late Cretaceous [details]