MolluscaBase taxon details
original description
(of Planorbis praecursoris C. A. White, 1895 †) 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
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): 14, pl. 2, figs 1a-g [details]