life see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Eukaryota Chatton, 1925 - eukaryotes see Domain Eukaryota Chatton, 1925
     Metazoa Haeckel 1874 - multicellular animals see Kingdom Animalia Linnaeus, 1758
       Bilateria Hatschek, 1888 - bilaterians see Subkingdom Bilateria Hatschek, 1888
         Nephrozoa Jondelius, Ruiz-Trillo, Baguñà & Riutort 2002
           Deuterostomia Grobben, 1908 - deuterostomes see Infrakingdom Deuterostomia Grobben, 1908
             Phylum Chordata Bateson, 1885 - chordates
               Subphylum Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
                 Infraphylum Gnathostomata Gegenbaur, 1874 - jawed vertebrates see Superclass Gnathostomata Gegenbaur, 1874
                   Class Osteichthyes Huxley, 1880 - bony fishes and tetrapods see Clade Osteichthyes Huxley 1880 [Moore & Near 2020]
                     Subclass Sarcopterygii Romer, 1955 - lobe-finned fishes and tetrapods see [unranked] Sarcopterygii Romer, 1955
                       Infraclass Tetrapodomorpha Ahlberg, 1991 see [unranked] Tetrapodomorpha Ahlberg, 1991
                         Osteolepidida Boulenger 1901 [Cloutier & Ahlberg 1996]
                           Eotetrapodiformes Coates & Friedman, 2010
                             Elpistostegalia Camp & Allison, 1961
                               Superclass Tetrapoda Goodrich, 1930 - tetrapods see Clade Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988], nom. cl. inval.
                                 1 Family †Elginerpetontidae Ahlberg, 1995
                                 2.1.1 Genus †Metaxygnathus Campbell & Bell, 1977
                                 2.1.2 Genus †Ventastega Ahlberg, Luksevics & Lebedev, 1994
                                 2.2.1.1 Genus †Sinostega Zhu & Ahlberg, 2002
                                 2.2.1.2 Genus †Jakubsonia Lebedev, 2004
                                 2.2.1.3 Genus †Densignathus Daeschler, 2000
                                 2.2.2.1 Genus †Acanthostega Jarvik, 1952
                                 2.2.2.2.1 Genus †Ymeria Clack, Ahlberg, Blom & Finney, 2012
                                 2.2.2.2.2.1 Genus †Ichthyostega Säve-Söderbergh, 1932
                                 2.2.2.2.2.2.1 Genus †Hynerpeton Daeschler, Shubin, Thomson & Amaral, 1994
                                 2.2.2.2.2.2.2.1 Genus †Tulerpeton Lebedev, 1984
                                 2.2.2.2.2.2.2.2.1 Family †Colosteidae Cope, 1875 - colosteids
                                 2.2.2.2.2.2.2.2.2.1 Family †Crassigyrinidae Huene, 1948
                                 2.2.2.2.2.2.2.2.2.2.1 Family †Whatcheeriidae Clack, 2002
                                 2.2.2.2.2.2.2.2.2.2.2.1 Family †Baphetidae Cope, 1875
                                 2.2.2.2.2.2.2.2.2.2.2.2 Class Neotetrapoda Gaffney, 1979