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Ornithischia (from the Greek ornitheos meaning "of a bird" and ischion meaning "hip joint") is an extinct clade of mainly herbivorous dinosaurs characterized by a pelvic structure similar to that of birds. It is one of the two basic divisions of dinosaurs (the other being Saurischia). Birds are members of the Saurischia, or "lizard-hipped" dinosaurs. Ornithischia is well-supported as one of the two major groups in the Dinosauria. Many characteristics define the group though most are thought to be linked to herbivory.

Subcategories

This category has the following 3 subcategories, out of 3 total.

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