original description
White, C.A. (1880). Description of new invertebrate fossils from the Mesozoic and Cenozoic rocks of Arkansas, Wyoming, Colorado, and Utah. <em>Proceedings of the United States National Museum.</em> 3: 157–162., available online at https://www.biodiversitylibrary.org/page/14917257
page(s): 160 [details]
From editor or global species database
Type locality Evanston, Wyoming, United States; Evanston Formation, Campanian to Selandian, late Cretaceous to middle Paleocene
[details]