Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Craniata Linnaeus, 1758 see Subphylum Craniata auct.
     Pisces
       Class Actinopterygii Woodward, 1891 - ray-finned fishes see Clade Actinopterygii Woodward 1891 [Moore & Near 2020]
         Order Cyprinodontiformes Berg, 1940 - killifishes
           01 Family Aplocheilidae Bleeker, 1859 - Old World rivulins
           02 Family Nothobranchiidae Garman, 1895 - African rivulins
           03 Family Rivulidae Myers, 1925, nom. illeg. - New World rivulins
           04 Family Profundulidae Hoedeman & Bronner, 1951 - Middle American killifishes
           05 Family Fundulidae Günther, 1866 - topminnows and killifishes
           06 Family Valenciidae Parenti, 1981 - European killifishes
           07 Family Goodeidae Jordan & Gilbert, 1883 - splitfins
           08 Family Poeciliidae Bonaparte, 1831 - poeciliids
           09 Family Cyprinodontidae Wagner, 1828 - killifishes
           10 Family Anablepidae Bonaparte, 1831 - four-eyed fishes and onesided livebearers