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

Neornithischia ("new ornithischians") is a clade of the dinosaur order Ornithischia. They are the sister group of the Thyreophora within the clade Genasauria. Neornithischians are united by having a thicker layer of asymmetrical enamel on the inside of their lower teeth. The teeth wore unevenly with chewing and developed sharp ridges that allowed neornithischians to break down tougher plant food than other dinosaurs.
==Classification==
Neornithischia was first named by Cooper in 1985 and defined as "all genasaurians more closely related to ''Parasaurolophus walkeri'' Parks, 1922, than to ''Ankylosaurus magniventris'' Brown, 1908 or ''Stegosaurus stenops'' Marsh, 1877a". The cladogram below follows a 2011 analysis by paleontologists Richard J. Butler, Jin Liyong, Chen Jun and Pascal Godefroit.
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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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