original description
White, C.A. (1876). Invertebrate paleontology of the Plateau province, together with notice of a few species from localities beyond its limits in Colorado. In: Powell, J.W. (Ed.) Report on the geology of the eastern portion of the Uinta Mountains and a region of country adjacent thereto. With atlas. U. S. Geological and Geographic Survey of the Terretories, Washington, 74-135 pp., available online at https://www.biodiversitylibrary.org/page/19391191
page(s): 117 [details]
source of synonymy
Veatch, A.C. (1907). Geography and geology of a portion of southwestern Wyoming with special reference to coal and oil. <em>United States Geological Survey Professional Paper.</em> 56: 1-178, i-viii., available online at http://pubs.usgs.gov/pp/0056/report.pdf
page(s): 66 [details]
From editor or global species database
Type locality "Salt Wells Group; Upper Kanab, Utah, and Hilliard Station, Wyoming", USA; Late Cretaceous [details]