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ankylosauria : ウィキペディア英語版
ankylosauria

Ankylosauria ("crooked lizard", from the Ancient Greek ''Ankylos'' (ἀγκύλος), "Crooked" and ''Sauros'' (σαῦρος), "lizard"〔(【引用サイトリンク】url=http://www.etymonline.com/index.php?term=ankylosaurus&allowed_in_frame=0 )〕) is a group of herbivorous dinosaurs of the order Ornithischia. It includes the great majority of dinosaurs with armor in the form of bony osteoderms. Ankylosaurs were bulky quadrupeds, with short, powerful limbs. They are first known to have appeared in the early Jurassic Period of China, and persisted until the end of the Cretaceous Period. They have been found on every continent except Africa. The first dinosaur ever discovered in Antarctica was the ankylosaurian ''Antarctopelta'', fossils of which were recovered from Ross Island in 1986.
Ankylosauria was first named by Henry Fairfield Osborn in 1923.〔Osborn, H. F. (1923). "Two Lower Cretaceous dinosaurs of Mongolia." ''American Museum Novitates'', 95: 1–10.()〕 In the Linnaean classification system, the group is usually considered either a suborder or an infraorder. It is contained within the group Thyreophora, which also includes the stegosaurs, armored dinosaurs known for their combination of plates and spikes.
==Paleobiology==

They sported a very small brain size in proportion to their body, second only to the Saurischian sauropods. They were also rather slow moving, largely because of the shortness of the limbs combined with being incapable of running. Their top speed was likely less than 10 km/hour.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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