original description
Yen, T.-C. (1951). Some Lower Cretaceous pelecypods from Pryor, Montana. <em>American Museum Novitates.</em> 1481: 1-5.
page(s): 2-3, figs 1, 2 [details] Available for editors [request]
From editor or global species database
Type locality "Cloverly formation, top of basal blue stratum, approximately 45 feet above top of Lakota, near Hoplitosaurus skeleton (A.M.N.H. No. 3016), Monument Creek, 7 miles north of Pryor, Montana" (USA) [details]