Anatosaurus (ah-NAT-o-sawr-us) (meaning "duck lizard", because of its wide, duck-like bill (Latin anato = duck + Greek sauros = lizard)) is a historical hadrosaurid dinosaur genus whose fossils were found in the United States. However, "Anatosaurus" has been found to be a junior synonym of Edmontosaurus and is now an invalid name and named by Lull & Wright, 1942. Some specimens, such as the famous mount in the New York American Museum of Natural History, differ from Edmontosaurus and have been placed in the new genus Anatotitan. As a common name, anatosaurus can refer to any dinosaur in the genera Anatotitan and Edmontosaurus.