Ornithopoda

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Ornithopoda (subclass Archosauria, order Ornithischia) A suborder of dinosaurs which had an essentially bipedal gait. The suborder includes several families (e.g. Iguanodontidae, Pachycephalosauridae, and Hadrosauridae). The ornithopods are regarded as the most primitive of the ornithischian suborders.

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Ornithopoda Suborder of ornithischian dinosaurs which had an essentially bipedal gait, including several families, e.g. iguanodonts (Iguanodontidae) and hadrosaurs (Hadrosauridae). The ornithopods are regarded as the most primitive of the ornithischian suborders.