original description
Pierce, H.G. (1993). The nonmarine mollusks of the Late Oligocene-Early Miocene Cabbage Patch fauna of western Montana III. Aquatic mollusks and conclusions. <em>Journal of Paleontology.</em> 67(6): 980-993.
page(s): 983-984, figs 1.7-1.11 [details] Available for editors [request]
basis of record
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.
page(s): 71, figs 15N-Q [details] Available for editors [request]
From editor or global species database
Type locality Locality MV-6501 near Drummond, Powell County, Montana, United States; Renova Formation, lower Cabbage Patch beds, late Oligocene [details]