original description
White, C.A. (1876). Invertebrate paleontology of the Plateau province, together with notice of a few species from localities beyond its limits in Colorado. In: Powell, J.W. (Ed.) Report on the geology of the eastern portion of the Uinta Mountains and a region of country adjacent thereto. With atlas. U. S. Geological and Geographic Survey of the Terretories, Washington, 74-135 pp., available online at https://www.biodiversitylibrary.org/page/19391191
page(s): 126-127 [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): 91-92 [details] Available for editors [request]
From editor or global species database
Type locality "Upper Green River Group; Henry's Fork and Alkali Stage Station, Wyoming; also in Lower Green River Group; west side of Snake River, six miles north of Junction Mountain; Cliffs, four miles northeastward from Vermilion Canon; and Dry Mountains, Northwestern Colorado" [details]