original description
Meek, F.B. (1873). Preliminary paleontological report, consisting of lists and descriptions of fossils, with remarks on the ages of the rocks in which they were found, etc., etc. <em>United States Geological and Geographical Survey of the Territories, annual report.</em> 6: 431-541., available online at https://www.biodiversitylibrary.org/page/15677973
page(s): 499 [details]
From editor or global species database
Type locality Carleton's coal-mine, 2 miles SW of Coalville, Utah, United States; Cenomanian to Turonian, late Cretaceous [details]