Combined with Lymnaea by Pierce & Constenius (2001) but considered to belong in the emarginata-group, which is at present attributed to Ladislavella.
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 for editors [request]