Science Fair Project Encyclopedia
Marginocephalia
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|(unranked)||Marginocephalia
Pachycephalosauria
Ceratopia
Marginocephalia is a group of ornithischian dinosaurs that includes the thick-skulled pachycephalosaurids, and horned ceratopsians. They were all herbivores, walking in two or four legs, and they all had some kind of crest or bump in their heads.
The clade evolved in the Jurassic period, and became common in the Upper Cretaceous.
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details