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 14-16 [details]
From editor or global species database
Type locality Locality 22, E of Chaco River, San Juan County, New Mexico, United States; Fruitland Formation, late Campanian, late Cretaceous [details]