Hadrosaurids | |
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Mounted skeleton of Parasaurolophus cyrtocristatus, Field Museum of Natural History | |
Mounted skeleton of Edmontosaurus annectens, Oxford University Museum of Natural History | |
Scientific classification | |
Unrecognized taxon (fix): | Hadrosaurid |
Type species | |
†Hadrosaurus foulkii Leidy, 1858 | |
Subgroups | |
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Synonyms | |
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Hadrosaurs (meaning "bulky lizards") were the family of duck-billed herbivorous dinosaurs. They were the most common dinosaurs in the long Upper Cretaceous.
Hadrosaurs ranged in size from 10 to 65 ft (3 to 20 m) long. They had horny, toothless beaks and hundreds of cheek teeth in the sides of their jaws. The duck-billed dinosaurs had the most teeth; they had up to about 960 cheek teeth. Hadrosaurs lived during the later Cretaceous, and their fossils have been found in North America, Europe, and Asia.Riff the Hadrosaur on Barney and Friends
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