Keywords: Trachodon (Pteropelyx) marginatus ulna and radius.png Uploaded with en wp UW marker 2014 02 08 Ulna and radius of Trachodon Pteropelyx marginatus now assigned to Stephanosaurus marginatus from the same individual as the humerus Original publication Lambe L M 1902 On Vertebrata of the Mid-Cretaceous of the North West Territory Contributions to Canadian Palaeontology 3 4 pp 76 10 5962/bhl title 61817 <br/> Immediate source http //dx doi org/10 5962/bhl title 61817 1902 Lawrence Morris Lambe<br/> Life time 1863 “1919 PD-old-80 PD-US-1923 Hadrosauridae |