original description
Pierce, H.G.; Constenius, K.N. (2014). Terrestrial and Aquatic Mollusks of the Eocene Kishenehn Formation, Middle Fork Flathead River, Montana. <em>Annals of Carnegie Museum.</em> 82(4): 305-329., available online at https://doi.org/10.2992/007.082.0401
page(s): 318-320, fig. 7A [details] Available for editors [request]
From editor or global species database
Type locality Locality M-5, 48.309770°N, 113.612685°W, Middle Fork Flathead River, Flathead County, Montana, Montana, United States; Kishenehn Formation (Coal Creek Member, upper sequence), Lutetian, middle Eocene [details]