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