Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] 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
                     [crown] Clade Amorphea Adl et al. 2012 [Simpson, Medina & Adl 2020]
                       [crown] Clade Obazoa Brown, Sharpe, Silberman, Heiss, Lang, Simpson & Roger 2013
                         [crown] 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 Vertebrata Cuvier, 1812 - vertebrates
                                             Myopterygii - myopterygians
                                               Superclass Gnathostomata Gegenbaur, 1874 - jawed vertebrates
                                                 Grade Teleostomi Bonaparte, 1836
                                                   Euteleostomi - bony vertebrates
                                                     Class Actinopterygii Woodward, 1891 - ray-finned fishes
                                                       [crown] Actinopteri Cope, 1871
                                                         Subclass Neopterygii Regan, 1923
                                                           Infraclass Teleostei Müller, 1845
                                                             Supercohort Teleocephala de Pinna, 1996
                                                               Cohort Elopomorpha Greenwood et al., 1966
                                                                 Order Anguilliformes Rafinesque, 1810 - eels
                                                                   Genus †Libanechelys Taverne, 2004
                                                                   1 Genus †Enchelurus Marck, 1863, incertae sedis
                                                                   2.1 Genus †Abisaadia Belouze, Gayet & Atallah, 2003, incertae sedis
                                                                   2.2.1 Genus †Luenchelys Belouze, Gayet & Atallah, 2003, incertae sedis
                                                                   2.2.2.1 Family †Anguillavidae Hay, 1903, incertae sedis
                                                                   2.2.2.2.1 Genus †Hayenchelys Belouze, Gayet & Atallah, 2003, incertae sedis
                                                                   2.2.2.2.2.1 Family †Urenchelyidae Woodward, 1900, incertae sedis
                                                                   2.2.2.2.2.2 Suborder Anguilloideiᵀ Rafinesque, 1810
                                                                   2.2.2.2.2.2.5.0 [Family †"Patavichthidae"] see Family Patavichthyidae
                                                                   2.2.2.2.2.2.5.0 [Family †"Patavichtidae" Carroll, 1988, nom. null.] see Family Patavichthyidae
                                                                   2.2.2.2.2.3 Suborder Congroidei (Regan, 1909)
                                                                   2.2.2.2.2.3.1.0 [Family Todaridae Greenwood, Rosen, Weitzman & Myers, 1966]
                                                                   2.2.2.2.2.3.1.1.0 [Family Dysommidae Gill, 1893] see Family Synaphobranchidae Johnson, 1862
                                                                   2.2.2.2.2.3.1.1.0 [Family "Dyssomminidae" Böhlke & Hubbs, 1951]
                                                                   2.2.2.2.2.3.2.0 [Family Aoteidae Phillipps, 1926] see Family Ophichthidae Günther, 1870
                                                                   2.2.2.2.2.3.2.0 [Family Neenchelyidae Bamber, 1915] see Family Ophichthidae Günther, 1870
                                                                   2.2.2.2.2.3.4.2 [Family Nessorhamphidae] see Family Derichthyidae
                                                                   2.2.2.2.2.4 Suborder Muraenoidei Rafinesque, 1810
                                                                   2.2.2.2.2.5 Suborder Saccopharyngoidei
                                                                   2.2.2.2.2.5.0 [Suborder "Saccopharyngidae" Carroll, 1988, nom. null.] see Suborder Saccopharyngoidei