| Pseudoxiphophorus tuxtlaensis (McEachran & DeWitt, 2008) |
| Xenodexia Hubbs, 1950 |
| Xenodexia ctenolepis Hubbs, 1950 |
| Xenodexiinae Hubbs, 1950 |
| Xiphophorus Heckel, 1848 |
| Xiphophorus alvarezi Rosen, 1960 |
| Xiphophorus andersi M. K. Meyer & Schartl, 1980 |
| Xiphophorus bimaculatus Heckel, 1848 |
| Xiphophorus birchmanni Lechner & Radda, 1987 |
| Xiphophorus clemenciae Álvarez, 1959 |
| Xiphophorus continens Rauchenberger, Kallman & Morizot, 1990 |
| Xiphophorus cortezi Rosen, 1960 |
| Xiphophorus couchianus (Girard, 1859) |
| Xiphophorus evelynae Rosen, 1960 |
| Xiphophorus gordoni R. R. Miller & W. L. Minckley, 1963 |
| Xiphophorus gracilis Heckel, 1848 |
| Xiphophorus guntheri Jordan & Evermann, 1896 |
| Xiphophorus hellerii Heckel, 1848 |
| Xiphophorus hellerii subsp. alvarezi Rosen, 1960 |
| Xiphophorus jalapae Meek, 1902 |