| Scientific Name | TSN | Taxon Author | Common Name | Name Source | Usage | Reason (ITIS) | Taxon Rank |
|---|
| Alfaro | 165952 | Meek, 1912 | | ITIS | valid | | Genus |
| Belonesox | 165912 | Kner, 1860 | pike killifishes | ITIS | valid | | Genus |
| Brachyrhaphis | 165954 | Regan, 1913 | | ITIS | valid | | Genus |
| Carlhubbsia | 646814 | Whitley, 1951 | | ITIS | valid | | Genus |
| Cnesterodon | 165956 | Garman, 1895 | | ITIS | valid | | Genus |
| Gambusia | 165877 | Poey, 1854 | topminnmows gambusias | ITIS | valid | | Genus |
| Girardichthys | 165958 | | | ITIS | invalid | unavailable, other of Girardinus | Genus |
| Girardinus | 165932 | Poey, 1854 | | ITIS | valid | | Genus |
| Heterandria | 165914 | Agassiz, 1853 | least killifishes | ITIS | valid | | Genus |
| Heterophallus | 165960 | Regan, 1914 | | ITIS | invalid | junior synonym of Gambusia | Genus |
| Lebistes | 646816 | De Filippi, 1861 | | ITIS | invalid | junior synonym of Poecilia | Genus |
| Limia | 165944 | Poey, 1854 | | ITIS | valid | | Genus |
| Micropoecilia | 165964 | Hubbs, 1926 | | ITIS | valid | | Genus |
| Neoheterandria | 646860 | Henn, 1916 | | ITIS | valid | | Genus |
| Pamphorichthys | 646866 | Regan, 1913 | | ITIS | valid | | Genus |
| Phallichthys | 165934 | Hubbs, 1924 | | ITIS | valid | | Genus |
| Phalloceros | 165939 | Eigenmann, 1907 | | ITIS | valid | | Genus |
| Phalloptychus | 165967 | Eigenmann, 1907 | | ITIS | valid | | Genus |
| Phallotorynus | 646815 | Henn, 1916 | | ITIS | valid | | Genus |
| Platypoecilus | 165931 | Günther, 1866 | | ITIS | invalid | junior synonym of Xiphophorus | Genus |
| Poecilia | 165897 | Bloch and Schneider, 1801 | livebearers mollies | ITIS | valid | | Genus |
| Poeciliopsis | 165916 | Regan, 1913 | desert topminnows | ITIS | valid | | Genus |
| Priapella | 165950 | Regan, 1913 | | ITIS | valid | | Genus |
| Priapichthys | 646817 | Regan, 1913 | | ITIS | valid | | Genus |
| Pseudopoecilia | 646877 | Regan, 1913 | | ITIS | valid | | Genus |
| Pseudoxiphophorus | 165969 | Bleeker, 1860 | | ITIS | invalid | junior synonym of Heterandria | Genus |
| Quintana | 646861 | Hubbs, 1934 | | ITIS | valid | | Genus |
| Quitana | 165971 | Hubbs, 1934 | | ITIS | invalid | unavailable, literature misspelling of Quintana | Genus |
| Scolichthys | 646818 | Rosen, 1967 | | ITIS | valid | | Genus |
| Tomeurus | 646819 | Eigenmann, 1909 | | ITIS | valid | | Genus |
| Xenodexia | 646820 | Hubbs, 1950 | | ITIS | valid | | Genus |
| Xenophallus | 646882 | Hubbs, 1924 | | ITIS | valid | | Genus |
| Xiphophorus | 165919 | Heckel, 1848 | swordtails | ITIS | valid | | Genus |
