Classification of Meyer and Zardoya 2003
Superor. Lepidosauria Haeckel 1866 [lepidosaur]
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Or. Squamata Oppel 1811 [squamates]
Invalid names: Sphenodonta [empty]
Subcl. Neornithes Gadow 1893
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Superor. Neognathae Pycraft 1900
Superor. Palaeognathae Pycraft 1900
Unr. Amniota Haeckel 1866 [amniote]
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Cl. Reptilia Laurenti 1768 [reptile]
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Infracl. Archosauromorpha Huene 1946 [archosauromorph]
Infracl. Lepidosauromorpha Benton 1983
Or. Testudines Batsch 1788 [turtle]
Subcl. Synapsida Osborn 1903 [synapsid]
Unr. Tetrapoda Jaekel 1911 [tetrapod]
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Subph. Vertebrata Lamarck 1801 [vertebrate]
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Supercl. Gnathostomata Gegenbauer 1874 [jawed fish]
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Cl. Chondrichthyes Huxley 1880 [cartilaginous fish]
Cl. Osteichthyes Huxley 1880 [bony fish]
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Cl. Actinopterygii Cope 1887 [ray-finned fish]
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Unr. Neopterygii Regan 1923
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Or. Acipenseriformes Berg 1940
Or. Amiiformes Hay 1929 [bowfin]
Or. Lepisosteiformes Hay 1929 [gar]
Subcl. Teleostei Müller 1846
Unr. Polypteriformes
Unr. Sarcopterygii Romer 1955 [lobe-finned fish]
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Unr. Actinistia Cope 1870
Unr. Dipnomorpha Ahlberg 1991
Invalid names: Pisces Linnaeus 1758 [synonym]
Or. Myxiniformes [hagfish]
Invalid names: Cephalaspidomorpha [empty]