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Marginocephalia : ウィキペディア英語版 | Marginocephalia
Marginocephalia ("fringed heads") is a clade of ornithischian dinosaurs that includes the thick-skulled pachycephalosaurids, and horned ceratopsians. They were all herbivores, walking on two or four legs, and are characterized by a bony ridge or frill at the back of the skull. The clade evolved in the Jurassic period, and became common in the Upper Cretaceous. ==Classification== The cladogram below follows a 2009 analysis by Zheng and colleagues. }} |label2=Ceratopsia |2= }} }} }} }} }} Cladogram after Butler ''et al.'', 2011. }} |label2=Ceratopsia |2= }} }} }} }} }}
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Marginocephalia」の詳細全文を読む
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