original description
Hartman J.H. (2015). New viviparid gastropods from the end Cretaceous and early Paleogene of the Williston Basin, USA and Canada. <em>The Nautilus.</em> 129(1): 1-22.
page(s): 4, figs 3-22 [details]
From editor or global species database
Type locality Locality L1151, Garfield County, Montana, United States; Hell Creek Formation, Maastrichtian, late Cretaceous [details]