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Anatosaurus

Anatosaurus Lull & Wright, 1942 (meaning duck lizard) is a chronological hadrosaurid dinosaur genus. However, "Anatosaurus" has been establish to be a junior synonym of Edmontosaurus and is now an invalid name.

Some specimens, such as the well-known mount in the New York American Museum of Natural History, vary 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. 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, 1890 [nomen dubium], now Anatotitan longiceps
A. saskatchewanensis (C. M. Sternberg, 1926) (originally Thespesius), now Edmontosaurus saskatchewanensis