Chordata (Chordates) 17

Cephalochordata (Lancelets)

Urochordata (Tunicates)

Appendicularia (Free-swimming tadpole-shaped pelagic animals)

Ascidiacea (Sea squirts)

Thaliacea (Salps, small barrel shaped animals)

Craniata

Hyperotreti

Myxiniformes (Hagfishes)

Vertebrata (Vertebrates)

Hyperoartia (Jawless vertebrates, lampreys)

Gnathostomata (Jawed vertebrates)

Chondrichthyes (Cartilaginous fishes)

Elasmobranchii (Elasmobranchs)

Neoselachii (Sharks and rays)

Holocephali (Chimaeras or ratfishes)

Teleostomi

Euteleostomi (Bony vertebrates)

Actinopterygii (Ray-finned fishes)

Actinopteri

Chondrostei (Sturgeons and paddlefishes)

Neopterygii (Bowfin, gars, teleosts)

Polypteriformes (Bichirs)

Sarcopterygii (Lobe-finned fishes & tetrapoda vertebrates)

Coelacanthimorpha (Coelacanths)

Dipnoi (Lungfishes)

Tetrapoda (Tetrapods)

Amniota (Amniotes)

Mammalia (Mammals)

Sauropsida (Sauropsids--birds and reptiles)

Amphibia (Amphibians)

Batrachia (Frogs, salamanders and toads)

Gymnophiona (Caecilians)