Fishes
   Class Actinopterygii Woodward, 1891 - ray-finned fishes see Clade Actinopterygii Woodward 1891 [Moore & Near 2020]
     Order Cyprinodontiformes Berg, 1940 - killifishes
       Family Cyprinodontidae Wagner, 1828 - killifishes
         1 Subfamily Cubanichthyinae Parenti, 1981 - island pupfishes
         2 Subfamily Cyprinodontinae Wagner, 1828 - pupfishes