original description
Meek, F.B. (1860). Descriptions of new fossil remains collected in Nebraska and Utah, by the exploring expeditions under the command of Captain J. H. Simpson, of U. S. Topographical Engineers, [extracted from that officer's forthcoming report]. <em>Proceedings of the Academy of Natural Sciences of Philadelphia.</em> 12: 308-315., available online at https://www.biodiversitylibrary.org/page/26297455
page(s): 314 [details]
From editor or global species database
Type locality Hams Fork River ("Ham's Fork"), Lincoln County, Wyoming, United States; Eocene (precise age unknown) [details]