| Poeciliopsis turrubarensis (Meek, 1912) |
| Poeciliopsis viriosa R. R. Miller, 1960 |
| Priapella Regan, 1913 |
| Priapella bonita (Meek, 1904) |
| Priapella chamulae Schartl, M. K. Meyer & Wilde, 2006 |
| Priapella compressa Álvarez, 1948 |
| Priapella intermedia Álvarez & Carranza, 1952 |
| Priapella lacandonae M. K. Meyer, Schories & Schartl, 2011 |
| Priapella olmecae M. K. Meyer & Espinosa-Pérez, 1990 |
| Pseudoxiphophorus Bleeker, 1860 |
| Pseudoxiphophorus bimaculatus (Heckel, 1848) |
| Pseudoxiphophorus jonesii (Günther, 1874) |
| Pseudoxiphophorus pauciradiatus Regan, 1904 |
| Pseudoxiphophorus reticulatus Troschel, 1865 |
| Pseudoxiphophorus tuxtlaensis (McEachran & DeWitt, 2008) |
| Xenodexia Hubbs, 1950 |
| Xenodexia ctenolepis Hubbs, 1950 |
| Xenodexiinae Hubbs, 1950 |
| Xiphophorus Heckel, 1848 |
| Xiphophorus alvarezi Rosen, 1960 |