original description
White, C.A. (1895). The Bear River Formation and its characteristic fauna. <em>United States Geological Survey Bulletin.</em> 128: 1-108., available online at https://archive.org/details/bearriverformat00whitgoog
page(s): 46-47, pl. 6, figs 4-7 [details]
basis of record
Henderson, J. (1935). Fossil non-marine Mollusca of North America. <em>Geological Society of America Special Papers.</em> 3: 1-313.
page(s): 250 [details] Available for editors [request]
From editor or global species database
Type locality 20 miles N of Cokeville, Lincoln County, Wyoming, United States; Cenomanian, late Cretaceous [details]