Alternative combinations: Anatosaurus saskatchewanensis, Thespesius saskatchewanensis
Full reference: C. M. Sternberg. 1926. A new species of Thespesius from the Lance Formation of Saskatchewan. Canada Department of Mines Geological Survey Bulletin (Geological Series) 44(46):73-84
Type specimen: NMC 8509. Its type locality is Wood Mountain, Rocky Creek, which is in a Maastrichtian terrestrial claystone/sandstone in the Ravenscrag Formation of Canada.
Ecology: ground dwelling herbivore