Prosaurolophus

 

• Late Cretaceous
• North America
• 26 feet long
• Was a member of the Hadrosaur Family of 'Duckbills'. They were a North American species that was part of a group that migrated from Asia. There were two types of Hadrosaurs, some had flat heads while others had crested heads. The front of the jaw was beak like and contained no teeth, but the back of the jaw contained banks of tightly packed teeth. As old teeth wore down new ones took their place.