Combined with Lymnaea by Pierce & Constenius (2001) but considered to belong in the catascopium-group, which is at present attributed to Ladislavella.
Pierce, H.G.; Constenius, K.N. (2001). Late Eocene-Oligocene nonmarine mollusks of the northern Kishenehn Basin, Montana and British Columbia. <em>Annals of Carnegie Museum.</em> 70(1): 1-112. Available for editors [request]