Superphylum Deuterostomia Grobben, 1908 - deuterostomes see Infrakingdom Deuterostomia Grobben, 1908
   Phylum Chordata Bateson, 1885 - chordates
     Subphylum Craniata auct.
       Vertebrata Lamarck, 1801 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
         Myopterygii Janvier, 1978 - myopterygians
           Superclass Gnathostomata Gegenbaur, 1874 - jawed vertebrates
             Grade Teleostomi Bonaparte, 1836 see Clade Pan-Osteichthyes Rowe 2004 [Moore & Near 2020]
               Euteleostomi - bony vertebrates see Clade Osteichthyes Huxley 1880 [Moore & Near 2020]
                 Class Actinopterygii Woodward, 1891 - ray-finned fishes see Clade Actinopterygii Woodward 1891 [Moore & Near 2020]
                   Subclass Neopterygii Regan, 1923
                     Division Teleostei Müller, 1845
                       Elopocephala Arratia, 1999 see Supercohort Teleocephala de Pinna, 1996
                         Clupeocephala Patterson & Rosen, 1977 see Cohort Clupeocephala Patterson & Rosen, 1977
                           Subdivision Euteleostei Greenwood et al., 1966 [monophyletic?] see Cohort Euteleostei Greenwood et al., 1966
                             Neoteleostei Nelson, 1969 - neoteleosts see Infracohort Neoteleostei Nelson, 1969
                               Eurypterygii Rosen, 1973 - eurypterygians see Infracohort Eurypterygia Rosen, 1973
                                 Ctenosquamata - ctenosquamates see Section Ctenosquamata Rosen, 1973
                                   Acanthomorpha Rosen, 1973 - spiny-rayed fishes see Subsection Acanthomorphata Rosen, 1973
                                     Euacanthomorpha Johnson & Patterson, 1993
                                       Holacanthopterygii Johnson & Patterson, 1993
                                         Superorder Acanthopterygii Rosen & Patterson, 1969 see Division Acanthopterygii Rosen & Patterson, 1969
                                           Series Atherinomorpha Greenwood et al., 1966 see Infraseries Atherinomorpha
                                             Superorder Cyprinodontea see [unranked] Cyprinodontoidei Dyer & Chernoff, 1996
                                               Order Cyprinodontiformes Berg, 1940 - killifishes
                                                 Suborder Cyprinodontoidei
                                                   Superfamily Poecilioidea Bonaparte, 1831
                                                     Family Poeciliidae Bonaparte, 1831 - poeciliids
                                                       Subfamily Poeciliinae Bonaparte, 1831 - livebearers
                                                         1 Tribe Alfarini Hubbs, 1924 [monotypic]
                                                         2 Tribe Priapellini [monotypic]
                                                         3 Tribe Gambusini "Gill, 1889", orth. inval. see Tribe Gambusiini Gill, 1889
                                                         4 Tribe Heterandrini "Hubbs, 1924", orth. inval. see Tribe Heterandriini Hubbs, 1924
                                                         5 Tribe Girardini "Hubbs, 1924", orth. inval. see Tribe Girardinini Hubbs, 1924
                                                         6 Tribe Poeciliini Bonaparte, 1831
                                                         7 Tribe Cnesterodontini Hubbs, 1924
                                                         8 Tribe Scolichthyini [monotypic]
                                                         9 Tribe Xenodexini "Hubbs, 1950", orth. inval. [monotypic] see Tribe Xenodexiini Hubbs, 1950