Edmontosaurus regalis

† Edmontosaurus regalis, the 'royal Edmonton lizard,' is a large saurolophine hadrosaur from the Campanian Horseshoe Canyon Formation of Alberta, Canada. Up to 12 m long and 4 tonnes, it co-existed with tyrannosaur Albertosaurus in the high-latitude river delta environments of northern Laramidia. A crest of soft tissue has been proposed above its head. Its dental batteries of hundreds of teeth processed vast quantities of tough plant material, making it one of the most specialised herbivores of