Maiasaura
Maiasaura (from Greek: μαῖα, lit. 'good mother' and Greek: σαύρα, the feminine form of saurus, lit. 'reptile') is a large herbivorous saurolophine hadrosaurid ("duck-billed") dinosaur genus that lived in the area currently covered by the state of Montana and the Canadian province of Alberta, in the Upper Cretaceous (mid to late Campanian), from 86.3 to 70.6 million years ago. Discovered in 1978 during the dinosaur renaissance, the species description of Maiasaura first came in 1979 from paleontologists Jack Horner and Bob Makela following the discovery of a site located South of Choteau, Montana.