crocs and relatives homed dome- heads duckbills souropods prosauropods other theropods ornithischians dinosaurs theropods saurischians ornithodirans (archosaurs related to birds) archosaurs (ruling reptiles) Birds are dinosaurs. However, an old, traditional grouping does not include birds in dinosaurs. According to the traditional classification, the would then be considered 0000 Not phyletic Monophyletic Polyphyletic Paraphyletic group dinosaurs

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