Cephalochordata Chordata Urochordata Olfactores Vertebrata Vertebrata Cyclostomata Petromyzontida Myxinoidea Gnathostomata Chondrichthyes Actinopterygii Sarcopterygii Gnathostomata Osteognathostomata Elasmobranchii Holocephali Elasmobranchii Galeomorphi Squalimorphi Batoidei Actinopterygii Cladistia Chondrostei Ginglymodi Halecomorphi Teleostei Dipnoi Choanata Actinistia Tetrapoda Sarcopterygii Tetrapoda Lissamphibia Gymnophiona Caudata Anura Amniota Batrachia Theropoda Amniota Testudines Diapsida Lepidosauria Archosauria Synapsida Sauropsida Crocodylia Mammalia Aves Squamata Sphenodontida Gekkota Scincoidea Lacertoidea Amphisbaenia Lacertidae Acrodonta Pleurodonta Anguimorpha Serpentes Anguidae Varanidae Helodermatidae Chamaeleonidae Agamidae Iguania Typhlopidae Boidae Pythonidae Viperidae Elapidae Colubridae Aves Palaeognathae Neognathae Struthioniformes Tinamiformes Galloanseres Neoaves Galliformes Anseriformes Columbea Passerea Neoaves Phoenicopterimorphae Columbimorphae Otidimorphae Caprimulgimorphae Cursorimorphae Phaethontimorphae Procellariimorphae Pelecanimorphae Coraciimorphae Passerimorphae - Podicipediformes, Phoenicopteriformes - Columbiformes, Pterocliformes, Mesotornithiformes - Cuculiformes, Musophagifomes, Otidiformes - Caprimulgiformes, Apodiformes Gaviimorphae Opisthocomiformes - Gruiformes, Charadriiformes - Gaviiformes - Sphenisciformes, Procellariiformes - Pelecaniformes, Phalocrocoracidae, Ciconiiformes Accipitrimorphae - Accipitriformes Strigiformes Coliiformes, Trogoniformes, Bucerotiformes, Piciformes, Coraciiformes Falconiformes - Psittaciformes, Passeriformes - Mammalia Monotremata Marsupialia Placentalia Didelphoidea Caenolestida Dasyuroidea Notoryctoidea Peramelida Diprotodontia Microbiotheria Marsupialia Xenarthra Placentalia Boreoeutheria Atlantogenata Laurasiatheria Euarchontoglires Afrotheria Macroscelidea Afrosoricida Tubulidentata Afrotheria Hyracoidea Sirenia Proboscidea Xenarthra Vermilingua Folivora Cingulata Pilosa Laurasiatheria Euarchontoglires Glires Euarchonta Lagomorpha Rodentia Primates Scandentia Dermoptera Eulipotyphla Chiroptera Cetartiodactyla Perissodactyla Pholidota Carnivora