Fishes
   Class Actinopterygii Woodward, 1891 - ray-finned fishes see Clade Actinopterygii Woodward 1891 [Moore & Near 2020]
     Order Cyprinodontiformes Berg, 1940 - killifishes
       1 Family Aplocheilidae Bleeker, 1859 - Old World rivulins
       2 Family Profundulidae Hoedeman & Bronner, 1951 - Middle American killifishes
       3 Family Fundulidae Günther, 1866 - topminnows and killifishes
       4 Family Valenciidae Parenti, 1981 - European killifishes
       5 Family Goodeidae Jordan & Gilbert, 1883 - splitfins
       6 Family Poeciliidae Bonaparte, 1831 - poeciliids
       7 Family Cyprinodontidae Wagner, 1828 - killifishes
       8 Family Anablepidae Bonaparte, 1831 - four-eyed fishes and onesided livebearers