Traits taxon details
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 
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 
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