original description
Gabb, W. M. (1864). Description of the Cretaceous fossils. <em>In: Meek, F. B. and Gabb, W. M. Geological Survey of California, Palaeontology of California.</em> 1: 55-243, pls. 9-32., available online at https://biodiversitylibrary.org/page/2062749
page(s): 133, pl. 20, fig. 90 [details]
From editor or global species database
Type locality Tuscan Springs, Tehama County, California, United States; Chico Formation, Coniacian to Campanian, late Cretaceous [details]