Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Clade neomura Cavalier-Smith, 1987
             Domain Eukaryota Chatton, 1925 - eukaryotes
               Clade discaria Cavalier-Smith, 2021
                 Clade dorsates Cavalier-Smith, 2021
                   Clade podiates Cavalier-Smith, 2012
                     Clade Amorphea Adl et al. 2012 [Simpson, Medina & Adl 2020]
                       Clade Obazoa Brown, Sharpe, Silberman, Heiss, Lang, Simpson & Roger 2013
                         Clade Opisthokonta Cavalier-Smith 1987 [Simpson & Medina 2020] - animal-fungal clade
                           Superkingdom Holozoa Lang, O'Kelly, Nerad, Gray & Burger, 2002
                             Clade filozoa Shalchian-Tabrizi, Minge, Espelund, Orr, Ruden, Jakobsen & Cavalier-Smith, 2008
                               Kingdom Animalia Linnaeus, 1758 - animals
                                 Clade Planulozoa Wallberg, Thollesson, Farris & Jondelius 2004
                                   Subkingdom Bilateria Hatschek, 1888 - bilaterians
                                     Clade Nephrozoa Jondelius, Ruiz-Trillo, Baguñà & Riutort 2002
                                       Infrakingdom Deuterostomia Grobben, 1908
                                         Phylum Chordata Bateson, 1885 - chordates
                                           Subphylum Craniata auct.
                                             Infraphylum Vertebrata Lamarck, 1801 - vertebrates
                                               Clade Pan-Gnathostomata Downs 2020
                                                 Superclass Gnathostomataᵀ Gegenbaur, 1874 - jawed vertebrates
                                                   [crown] Clade Eugnathostomata
                                                     Clade Pan-Osteichthyes Rowe 2004 [Moore & Near 2020]
                                                       Clade Osteichthyes Huxley 1880 [Moore & Near 2020]
                                                         Clade Pan-Actinopterygii Rowe 2004 [Moore & Near 2020]
                                                           Clade Actinopterygiiᵀ Woodward 1891 [Moore & Near 2020]
                                                             Clade Pan-Actinopteri Moore & Near 2020
                                                               Class Actinopteri Cope, 1871
                                                                 Subclass Neopterygii Regan, 1923
                                                                   Infraclass Teleosteomorpha Arratia, 2001
                                                                     Division Teleostei Müller, 1845
                                                                       Supercohort Teleocephala de Pinna, 1996 - crown-group Teleostei
                                                                         Cohort Elopomorpha Greenwood et al., 1966
                                                                           Order Anguilliformes Berg, 1943 - eels
                                                                             Suborder Anguilloideiᵀ
                                                                               1 Genus †Gazolapodus Blot, 1981, incertae sedis
                                                                               2 Family †Anguilloididae Blot, 1978
                                                                               3 Family †Patavichthyidae Blot, 1981 [monotypic]
                                                                               4 Family †Proteomyridae Blot, 1981 [monotypic]
                                                                               5 Family Moringuidae Gill, 1885 - spaghetti eels
                                                                               6.1 Family Anguillidaeᵀ Rafinesque, 1810 - freshwater eels
                                                                               6.2 Family Nemichthyidae Kaup, 1859 - snipe eels
                                                                               7 Family Serrivomeridae Trewavas, 1932 - sawtooth eels
                                                                               8.1 Family Cyematidae Regan, 1912 [monotypic] - bobtail eels
                                                                               8.2.1 Family Monognathidae Trewavas, 1937 [monotypic] - onejaw gulpers
                                                                               8.2.2 Family Neocyematidae Poulsen, Miller, Sado, Hanel, Tsukamoto & Miya, 2018 [monotypic] - orange bobtail eels
                                                                               8.2.3 Family Eurypharyngidae Gill, 1883 [monotypic] - gulper eels
                                                                               8.2.4 Family Saccopharyngidae Bleeker, 1859 [monotypic] - swallower eels
                                                                               x [Family "Cyemidae" Regan, 1912] see Family Cyematidae Regan, 1912
                                                                               x [Family Dysommatidae Gill, 1893] see Family Synaphobranchidae Johnson, 1862
                                                                               x [Family Ilyophidae Jordan & Davis, 1891] see Subfamily Ilyophinae Jordan & Davis, 1891
                                                                               x [Family Macrocephenchelyidae Fowler, 1934] see Family Congridae Kaup, 1856
                                                                               x [Family "Ophichthyidae"] see Family Ophichthidae Günther, 1870
                                                                               x [Family Simenchelyidae Gill, 1879] see Subfamily Simenchelyinae Gill, 1879
                                                                               x [Family Xenocongridae Regan, 1912 - false moray eels] see Family Chlopsidae Rafinesque, 1815