original description
White, C.A. (1886). On the Fresh-water Invertebrates of the North American Jurassic. <em>United States Geological Survey Bulletin.</em> 29: 1-41.
page(s): 20-21, pl. 4, figs 12-15 [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): 234 [details] Available for editors [request]
From editor or global species database
Type locality 8 miles north of Cañon City, Colorado, United States; Morrison Formation, late Jurassic [details]