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Ankylosaurus [nb 1] is a genus of armored dinosaur.Its fossils have been found in geological formations dating to the very end of the Cretaceous Period, about 68–66 million years ago, in western North America, making it among the last of the non-avian dinosaurs.
Ankylosauria is a group of herbivorous dinosaurs of the clade Ornithischia.It includes the great majority of dinosaurs with armor in the form of bony osteoderms, similar to turtles.
Saichania (Mongolian meaning "beautiful one") is a genus of herbivorous ankylosaurid dinosaur from the Late Cretaceous period of Mongolia and China.. The first fossils of Saichania were found in the early 1970s in Mongolia.
Ankylosaurinae is formally defined in the PhyloCode as "the largest clade containing Ankylosaurus magniventris, but not Shamosaurus scutatus". [2] [3] [4] The tribe Ankylosaurini is defined in the PhyloCode as "the largest clade containing Ankylosaurus magniventris, but not Pinacosaurus grangeri and Saichania chulsanensis".
A life reconstruction of Antarctopelta at the Chilean National Museum of Natural History Size comparison of three named parankylosaurians compared to an average human. Known members of Parankylosauria are all small animals, ranging from 1.5–4.0 metres (4.9–13.1 ft), and possessed proportionally large skulls.
Ankylosauridae (/ ˌ æ ŋ k ɪ l oʊ ˈ s ɔː r ɪ d iː /) is a family of armored dinosaurs within Ankylosauria, and is the sister group to Nodosauridae.The oldest known ankylosaurids date to around 122 million years ago and went extinct 66 million years ago during the Cretaceous–Paleogene extinction event. [1]
Tarchia was a medium-sized ankylosaur, measuring around 5.5–6 metres (18–20 ft) long and weighing up to 2.5–3 metric tons (2.8–3.3 short tons). [9] [10] If ZPAL MgD I/113 indeed belongs to the genus, it would have belonged to an individual measuring 5.8–6.7 metres (19–22 ft) long.
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