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Hadrosaurus
| Hadrosaurus | |
|---|---|
| |
| Reconstructed skeleton, Academy of Natural Sciences | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | †Ornithischia |
| Clade: | †Ornithopoda |
| Family: | †Hadrosauridae |
| Subfamily: | †Hadrosaurinae |
| Genus: | †Hadrosaurus Leidy, 1858 |
| Type species | |
| †Hadrosaurus foulkii Leidy, 1858
| |
| Synonyms | |
| |
Hadrosaurus (/ˌhædrəˈsɔːrəs/; lit. 'bulky lizard') is a genus of hadrosaurid ornithopod dinosaurs that lived in North America during the Late Cretaceous Period in what is now the Woodbury Formation in New Jersey about 83.6 to 77.9 Ma. The holotype specimen was found in fluvial marine sedimentation, meaning that the corpse of the animal was transported by a river and washed out to sea. Some fossils are found in the Tar Heel/Coachman Formation.[1]
They were large animals ranging from 7 to 8 m (23 to 26 ft) and 2 to 4 t (2.2 to 4.4 short tons). Most of the preserved elements are very robust, unusual traits in hadrosaurs. Hadrosaurus were ponderously built animals equipped with keratinous beaks for cropping foliage and a specialized and complex dentition for food processing.
Hadrosaurus foulkii, the only species in this genus, is known from a single specimen consisting of much of the skeleton and parts of the skull. The specimen was collected in 1858 from the Woodbury Formation in New Jersey, US, representing the first dinosaur species known from more than isolated teeth to be identified in North America. Using radiometric dating of bivalve shells from the same formation, the sedimentary rocks where the Hadrosaurus fossil was found have been dated at some time between 83.6 and 77.9 million years ago. In 1868, the only known specimen became the first-ever dinosaur skeleton to be mounted. In 1991, H. foulkii became the official state dinosaur of New Jersey.[2][3][4][5]
- ^ a b Brownstein, Chase (2018). "The biogeography and ecology of the Cretaceous non-avian dinosaurs of Appalachia". Palaeontologia Electronica. 21 (1): 1–56. doi:10.26879/801.
- ^ "NJDEP - New Jersey Geological and Water Survey - Hadrosaurus foulkii". state.nj.us. Retrieved January 4, 2025.
- ^ Vastano, Julia A. "The Story of New Jersey's State Fossil: Hadrosaurus foulkii". Geology Museum, The School of Arts and Sciences | Rutgers, The State University of New Jersey. Retrieved 2024-12-24.
- ^ "State Dinosaur - SNJ Today". snjtoday.com. 2022-08-02. Retrieved 2024-12-24.
- ^ "Official Designation: New Jersey State Dinosaur". levins.com. Retrieved 2024-12-24.
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