Edmontosaurus regalis

A large, flat-headed hadrosaurid from the Late Cretaceous of western North America, Edmontosaurus regalis grew to at least 13 meters (40 feet). One specimen preserves a fleshy, comb-like crest atop the skull that would not otherwise be evident from bone, as well as chunky neck scales and a ridge of keratinous scutes down the midline of the neck, back and tail.