Dinosaur: "Trachodon" altidens
Cretaceous: 83.6–72.1 Ma
Period
Epoch: Late Cretaceous
Stage: Middle-Late Campanian
Years: 83.6–72.1 Ma
Details
Status: nomen dubium
Author: Lambe
Year: 1902
Distribution
Area: North America
Country: Canada
Region: Alberta
Formation: Dinosaur Park
Sources
Material: Left maxilla with teeth.
References: Lull, Richard S.; Wright, Nelda E. (1942). "Hadrosaurian Dinosaurs of North America".
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