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Tunicates, sea squirts
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Phylum ChordataSubphylum Urochordata
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Lancelets
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Phylum ChordataSubphylum Cephalochordata
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Vertebrates
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Phylum ChordataSubphylum Vertebrata
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Hagfish
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Phylum ChordataSubphylum Vertebrata [Superclass Agnatha]Class Myxini
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Lampreys
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Phylum ChordataSubphylum Vertebrata[Superclass Agnatha]Class Cephalaspidomorphi
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Sharks, skates, rays
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Phylum ChordataSubphylum VertebrataClass Chondrichthyes
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Ray-finned fishes
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Phylum ChordataSubphylum VertebrataClass Actinopterygii
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Lobe-finned fishes
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Phylum ChordataSubphylum VertebrataClass Sarcopterygii
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Amphibians
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Phylum ChordataSubphylum VertebrataClass Amphibia
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Frogs, toads
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Phylum ChordataSubphylum VertebrataClass AmphibiaOrder Anura
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Salamanders
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Phylum ChordataSubphylum VertebrataClass AmphibiaOrder Urodela
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Mammals (monotremes, marsupials, eutherians, or therians)
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Phylum ChordataSubphylum VertebrataClass Mammalia
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Caecilians
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Phylum ChordataSubphylum VertebrataClass AmphibiaOrder Apoda
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Reptiles
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Phylum ChordataSubphylum VertebrataClass Reptilia
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Turtles, tortoises
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Phylum ChordataSubphylum VertebrataClass ReptiliaOrder Chelonia
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