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Key terms: jaw synapsids mammals bone bw suborder reptiles synapsida fossil pelycosaurs permian extinction therapsids triassic palate mya evolved paraphyletic cynodonts scutes amniote mammalian clade lower jaw temporal herbivores dentary canines metabolic primitive jaw joint benton cretaceous jaw bone transitional reptilian cladistic maxilla diapsid extinction event jurassic carnivorous lystrosaurus prehistoric progression behind each eye carboniferous more advanced early synapsids vertebrate paleontology Search external links cited by footnotes on Wikipedia page Synapsid: |
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