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Ornithischia

A Dictionary of Zoology | 1999 | 288 words | Copyright

Ornithischia (class Reptilia, subclass Archosauria) One of two orders of Mesozoic dinosaurs, which is distinguished primarily on the basis of its bird-like pelvis. Ornithischian dinosaurs were exclusively vegetarian and produced both bipedal forms (the Ornithopoda) and four-footed forms.

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