original description
Yen, T.-C. (1951). Fresh-Water Mollusks of Cretaceous Age From Montana and Wyoming. Part 2: An Upper Cretaceous nonmarine molluscan fauna from the Leeds Creek area, Lincoln County, Wyoming <em>United States Geological Survey Professional Paper</em>. 233-A: 11-18
page(s): 15, pl. 2, figs 7a-c [details]
From editor or global species database
Type locality 2 miles S of Antelope Creek, 3/4 mile E of highway 30, Lincoln County, Wyoming, United States; Blackleaf Formation, Albian to early Cenomanian, Cretaceous [details]