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. 5 [details] Available for editors [request]
From editor or global species database
Type locality "Ls. 13, sec. 33, tp. 1, rge. 11, w. 4th m.; S.E. side of Deadhorse coulee", Alberta, Canada; Upper Milk River beds, Late Cretaceous [details]