Superphylum Deuterostomia Grobben, 1908 - deuterostomes see Infrakingdom Deuterostomia Grobben, 1908
   Phylum Chordata Bateson, 1885 - chordates
     Subphylum Craniata auct.
       Infraphylum Vertebrata Lamarck, 1801 - vertebrates
         Superclass Gnathostomata Gegenbaur, 1874 - jawed vertebrates
           Eugnathostomata
             Grade Teleostomi Bonaparte, 1836 see Clade Pan-Osteichthyes Rowe 2004 [Moore & Near 2020]
               Class Osteichthyes Huxley, 1880 - bony fishes and tetrapods see Clade Osteichthyes Huxley 1880 [Moore & Near 2020]
                 Subclass Actinopterygii Woodward, 1891 - ray-finned fishes see Class Actinopterygii Woodward, 1891
                   [crown] Neopterygii Regan, 1923 see Subclass Neopterygii Regan, 1923
                     Division Teleosteomorpha Arratia, 2001 see Infraclass Teleosteomorpha Arratia, 2001
                       Subdivision Teleostei Müller, 1845 - teleosts see Division Teleostei Müller, 1845
                         Supercohort Teleocephala de Pinna, 1996 - crown-group Teleostei
                           Cohort Elopomorpha Greenwood et al., 1966
                             Order Anguilliformes Berg, 1943 - eels
                               1 Suborder Protanguilloidei [monotypic] see Suborder Synaphobranchoidei
                               2.1 Suborder Synaphobranchoidei [monotypic]
                               2.2.1 Suborder Muraenoidei
                               2.2.2.1 Suborder Chlopsoidei [monotypic]
                               2.2.2.2.1 Suborder Congroidei Regan, 1909
                               2.2.2.2.2.1 Suborder Moringuoidei [monotypic] see Suborder Anguilloidei
                               2.2.2.2.2.2.1 Suborder Saccopharyngoidei see Suborder Anguilloidei
                               2.2.2.2.2.2.2 Suborder Anguilloidei