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This clade excludes basal hadrosaurids such as Hadrosaurus and Yamatosaurus but self-destructs if Hadrosaurus is descended from the last common ancestor of Lambeosaurus and Saurolophus. [21] Premaxilla of Eotrachodon, the taxon named by Prieto-Marquez et al. 2016. Below is a cladogram from Prieto-Marquez et al. 2016. This cladogram is a recent ...
Scientific research on hadrosaurs began in the 1850s, [1] when Joseph Leidy described the genera Thespesius and Trachodon based on scrappy fossils discovered in the western United States. Just two years later he published a description of the much better-preserved remains of an animal from New Jersey that he named Hadrosaurus. [2]
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.
This list of the prehistoric life of Florida contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Florida. Precambrian [ edit ]
Hadrosauroidea was given a formal phylogenetic definition in the PhyloCode by Daniel Madzia and colleagues in 2021 as "the largest clade containing Hadrosaurus foulkii, but not Iguanodon bernissartensis". [1] The cladogram below follows an analysis by Andrew McDonald, 2012, and shows the position of Hadrosauroidea within Styracosterna: [2]
Life restoration. Augustynolophus was a large hadrosaur, reaching 8 metres (26 ft) in length and 3 metric tons (3.3 short tons) in body mass. [28] Like all species of hadrosaur, Augustynolophus morrisi was a herbivorous dinosaur which had a diet consisting of the plant life in the area, it was specialized to chew its food since hadrosaurs were one of the few known species of dinosaur that ...
Though hadrosaurid specimens from South America had been described before, Secernosaurus koeneri was the first species of South American hadrosaurid to be formally named. The genus name Secernosaurus means "separated reptile" [ 2 ] and comes from the Latin verb sēcernō , meaning to sever or divide, in reference to its geographic location ...
The size of the two Saurolophus species compared to humans. Saurolophus is known from material including nearly complete skeletons, giving researchers a clear picture of its bony anatomy. S. osborni, the rarer Albertan species, was around 8.2–8.5 m (27–28 ft) long, with its skull 1.0 m (3.3 ft) long.