Hadrosaurid dinosaur genus from the Late Cretaceous
Hadrosaurus
Temporal range: Late Cretaceous, ~80–78 Ma
PreꞒ
Ꞓ
O
S
D
C
P
T
J
K
Pg
N
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Possible Maastrichtian Record[1]
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
Trachodon foulkii (Leidy, 1858) Lydekker, 1888
Hadrosaurus cavatus (Cope, 1871)[citation needed]
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 about 78-80 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.
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 80.5 and 78.5 million years ago. In 1858, 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]
^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".
Hadrosaurus was one of the most complete dinosaur skeletons known. Leidy's monograph Cretaceous Reptiles of the United States, describing Hadrosaurus...
as well were given to Leidy. They were described in the same year as Hadrosaurus foulkii, giving a slightly better picture of the form of a hadrosaur...
named Hadrosaurus foulkii by Joseph Leidy. The site, designated a National Historic Landmark in 1994, is now a small park known as "Hadrosaurus Park"...
Lambeosaurinae. However, the name Hadrosaurinae is based on the genus Hadrosaurus which was found in more recent studies to be more primitive than either...
Scelidosauridae), including within it the genera Iguanodon, Hypsilophodon, and Hadrosaurus, in addition to Cetiosaurus and tentatively Stenopelix. The term Ornithopoda...
the original on March 10, 2013. Retrieved June 5, 2013. Levins, Hoag. "Hadrosaurus foulkii Becomes Official State Dinosaur, June, 1991". Archived from the...
site of formal scientific investigation of fossils. Around this time Hadrosaurus foulkii of neighboring New Jersey became the first mounted dinosaur skeleton...
analysis found Claosaurus agilis to be outside of the clade containing Hadrosaurus and other hadrosaurids, making it the closest non-hadrosaurid relative...
correctly discerned.) The creature was named Hadrosaurus foulkii. It was an extremely important find: Hadrosaurus was one of the first nearly complete dinosaur...
Raritan Bay of New Jersey. Although subsequently treated as a synonym of Hadrosaurus, Prieto-Marquez et al. (2006) found Ornithotarsus to share no diagnostic...
attention. In the mid-19th century Hadrosaurus foulkii was discovered and named. The Cretaceous duck-billed dinosaur Hadrosaurus foulkii is the New Jersey state...
and specimens have at times been classified as Diclonius, Trachodon, Hadrosaurus, Claosaurus, Thespesius, Anatosaurus, and Anatotitan before all being...
John Ostrom noted that an old species named by Othniel Charles Marsh, Hadrosaurus paucidens, based on USNM 5457, a partial maxilla and squamosal from the...
and Saurolophinae. This, along with the other Appalachian hadrosaur Hadrosaurus and possibly Lophorhothon, Claosaurus and both species of Hypsibema,...
Joseph Leidy, Hawkins designed and cast an almost complete skeleton of Hadrosaurus foulkii which was then displayed at the Academy of Natural Sciences in...
decade-long campaign by a Haddon Township teacher led to the selection of Hadrosaurus foulkii as the official state fossil in June 1991. This example of the...
kangaroo. This concept dates from Joseph Leidy's 1865 reconstruction of Hadrosaurus, the first to depict a dinosaur in a bipedal posture. In 1915, convinced...
skeleton of K. incurvimanus as Hadrosaurus in a photo caption. Although Horner in 1979 used the new combination Hadrosaurus [Kritosaurus] notabilis for a...
the Hadrosaurus mount created by noted natural history artist Benjamin Waterhouse Hawkins, made its debut at the Academy in 1868. Hadrosaurus mounts...
points with the genera Agathaumas, Anatosaurus, Anatotitan, Claosaurus, Hadrosaurus, Thespesius, and Trachodon, with references predating the 1980s typically...
and pyrite, deposited in a marine setting. The remains of the dinosaur Hadrosaurus have been recovered from this formation. Using radio isotope dating of...
unassociated teeth, one of which had double roots. With better remains from Hadrosaurus, he began to reconsider his taxonomy, and suggested, at least informally...
(1816–1865) discovered the first full dinosaur skeleton in North America (Hadrosaurus foulkii, which means "Foulke's big lizard") in Haddonfield, New Jersey...
material for a giant bovid, into Ceratops alticornis. In 1890 Marsh renamed Hadrosaurus paucidens into Ceratops paucidens; but the original assessment of Hatcher...
(1869), "Remarks on Eschrichtius polyporus, Hypsibema crassicauda, Hadrosaurus tripos, and Polydectes biturgidus", Proceedings of the Academy of Natural...
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