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Jaw
Chordate
Agnatha
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Key terms: class vertebrates fishes vertebrata reptiles groups birds based animal common mammals anatomy tree spinal vertebrae period below agnatha hagfish extinct evolutionary classification taxonomy phylogenetic reptilia devonian traditional bony fishes notochord sometimes lamprey jawless species amphibians given rise backbone some ancestral subphylum tetrapoda gnathostomata superclass physiology systematics osteichthyes vertebral column jawed vertebrates Search external links cited by footnotes on Wikipedia page Vertebrate: |
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