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| Cephalochordata_class | Lancelets |
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| Appendicularia | Larvacea |
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| Ascidiacea | Sea Squirts |
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| Thaliacea | Salps |
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| Actinopterygii | Ray-finned Fishes |
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| Amphibia | Amphibians |
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| Aves | Birds |
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| Cephalaspidomorphi | Lampreys |
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| Chondrichthyes | Cartilaginous Fishes |
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| Elasmobranchii | Sharks, Rays |
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| Mammalia | Mammals |
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| Reptilia | Reptiles |
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| Sarcopterygii | Lobe-finned Fishes |
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