| Scientific Name | TSN | Taxon Author | Common Name | Name Source | Usage | Reason (ITIS) | Taxon Rank |
|---|
| Anablepidae | 165864 | Garman, 1895 | cuatrojos four-eyed fishes poissons à quatre yeux four-eyes anablepids | ITIS | valid | | Family |
| Cyprinodontidae | 165629 | Gill, 1865 | killifishes toothcarps cachorritos cyprinodontes cyprinodontids pupfishes | ITIS | valid | | Family |
| Fundulidae | 553174 | Jordan and Gilbert, 1882 | fundulines fondules sardinillas killifishes topminnows | ITIS | valid | | Family |
| Goodeidae | 165859 | Jordan, 1923 | goodeid topminnows goodéidés mexcalpiques goodeids splitfins | ITIS | valid | | Family |
| Jenynsiidae | 165875 | | jenynsiid topminnows jenynsiids | ITIS | invalid | junior synonym of Anablepidae | Family |
| Poeciliidae | 165876 | Garman, 1895 | livebearers topminnows poecilies topotes y espadas poeciliids livebearing toothcarps | ITIS | valid | | Family |
| Profundulidae | 553204 | Hoedeman and Bronner, 1951 | Middle American killifishes escamudos profundulidés | ITIS | valid | | Family |
| Valenciidae | 553205 | Parenti, 1981 | | ITIS | valid | | Family |
