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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 ...
Illustration. First described in 1973, [3] Shantungosaurus is known from over five incomplete skeletons. Chinese scientist Xing Xu and his colleagues indicate that Shantungosaurus is very similar to and shares many unique characters with Edmontosaurus, forming a node of an Edmontosaurus–Shantungosaurus clade between North America and Asia, based on the new materials recovered in Shandong.
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.
At 15 meters in length and nearly 16 metric tons in weight it is the largest known hadrosaur and is known from a nearly complete skeleton. [5] Hadrosaur research has continued to remain active even into the new millennium. In 2000, Horner and others found that hatchling Maiasaura grew to adult body sizes at a rate more like a mammal's than a ...
Edmontosaurus included two of the largest hadrosaurid species, with E. annectens measuring up to 12 metres (39 ft) in length and weighing around 5.6 metric tons (6.2 short tons) in average asymptotic body mass, although some individuals would have been much larger. Several well-preserved specimens are known that include numerous bones, as well ...
Restoration. Charonosaurus is a very large lambeosaurine hadrosaur, estimated around 10 metres (33 ft) in length and 5 metric tons (5.5 short tons) in body mass. [1] [2] It is known from a partial skull (Holotype: CUST J-V1251-57 (Changchun University of Sciences and Technology, Changchun, Jilin Province, China) found in the Late Maastrichtian Yuliangze Formation, west of Jiayin village ...
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]
A saurolophine hadrosaur, the largest-known Hadrosaur, and one of the largest-known ornithischians, estimated to be over 14.72 m (48.3 ft) in length and weighing as much as 16 tonnes (18 short tons). †Telmatosaurus †Telmatosaurus transsylvanicus; 70–66 Ma Sanpetru Formation, Hunedoara County, Romania