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Temporal range: Upper Cretaceous
Hadrosaurus reconstruction.jpg
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Superorder: Dinosauria
Order: Ornithischia
Suborder: Cerapoda
Infraorder: Ornithopoda
Family: Hadrosauridae
Subfamily: Hadrosaurinae
Genus: Hadrosaurus
Leidy, 1858

H. foulkii Leidy, 1858 (type)

Hadrosaurus (Hadrosaurus foulkii) was a genus of hadrosaurid dinosaur from the Upper Cretaceous period. Is the only species in its genus and is the official state dinosaur of New Jersey.

The name is dubious because no skull has been found to distinguish it from near relatives.