original description
Russell, L.S. (1935). Fauna of the Upper Milk River beds, Southern Alberta. <em>Transactions of the Royal Society of Canada, third series. Section IV - Geological Sciences.</em> 29: 115-128.
page(s): 119, pl. 1, fig. 7 [details] Available for editors [request]
From editor or global species database
Type locality Locality 8, S.E. side of Deadhorse Coulee, Alberta, Canada; Milk River Formation (Deadhorse Coulee Member), Santonian to earliest Campanian, late Cretaceous [details]