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Jaw
Chordate
Agnatha
Brain
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Mammal
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Key terms: class fish vertebrates vertebrata reptiles birds classification amphibian mammals column anatomy animals backbone subphylum given rise systematics agnatha bony fish phylogenetic jawed vertebrates spinal paleozoic subclass physiology gnathostomata osteichthyes chondrichthyes chordates cartilaginous hagfish Search external links cited by footnotes on Wikipedia page Vertebrate: |
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