Anatosaurus

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.

The first name for the "Anatosaurus" was "Trachodon". Both specific and generic names were eventually thrown out.


 * type species: A. annectens (Marsh, 1892) (originally Claosaurus), now Edmontosaurus annectens
 * other species:
 * A. copei Lull & Wright, 1942, now Anatotitan copei
 * A. edmontonensis (Gilmore, 1922) (originally Edmontosaurus), now E. annectens
 * A. longiceps (Marsh, 1897) (originally Trachodon) [nomen dubium], now Anatotitan longiceps
 * A. saskatchewanensis (C. M. Sternberg, 1926) (originally Thespesius), now Edmontosaurus saskatchewanensis