Barnum Brown
Corythosaurus is a genus of hadrosaurid "duck-billed" dinosaur from the Upper Cretaceous Period, about 77–75.7 million years ago. It lived in what is now North America. Its name means "helmet lizard", derived from Greek κόρυς. It was named and described in 1914 by Barnum Brown. "Corythosaurus" is now thought to be a lambeosaurine, related to "Nipponosaurus", "Velafrons", "Hypacrosaurus", and "Olorotitan". "Corythosaurus" has an estimated length of , and has a skull, including the crest, that is tall.