n = 22
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Girardinus caucanus | Steindachner, 1880 | Poecilia caucana | Poeciliidae | Cauca molly |
| Girardinus caudimaculatus | Hensel, 1868 | Phalloceros caudimaculatus | Poeciliidae | Dusky millions fish |
| Girardinus creolus | Garman, 1895 | Girardinus creolus | Poeciliidae | Creole topminnow |
| Girardinus cubensis | (Eigenmann, 1903) | Girardinus cubensis | Poeciliidae | Cuban topminnow |
| Girardinus denticulatus | Garman, 1895 | Girardinus denticulatus | Poeciliidae | Toothy topminnow |
| Girardinus denticulatus ramsdeni | (Rivas, 1944) | Girardinus denticulatus | Poeciliidae | Toothy topminnow |
| Girardinus falcatus | (Eigenmann, 1903) | Girardinus falcatus | Poeciliidae | Goldbelly topminnow |
| Girardinus formosus | Girard, 1859 | Heterandria formosa | Poeciliidae | Least killifish |
| Girardinus garmani | Eigenmann, 1903 | Girardinus metallicus | Poeciliidae | Metallic livebearer |
| Girardinus guppii | Günther, 1866 | Poecilia reticulata | Poeciliidae | Guppy |
| Girardinus iheringii | Boulenger, 1889 | Phalloptychus januarius | Poeciliidae | January toothcarp |
| Girardinus januarius | Hensel, 1868 | Phalloptychus januarius | Poeciliidae | January toothcarp |
| Girardinus metallicus | Poey, 1854 | Girardinus metallicus | Poeciliidae | Metallic livebearer |
| Girardinus microdactylus | Rivas, 1944 | Girardinus microdactylus | Poeciliidae | Smallfinger topminnow |
| Girardinus pleurospilus | Günther, 1866 | Poeciliopsis pleurospilus | Poeciliidae | Largespot livebearer |
| Girardinus presidionis | (Jordan & Culver, 1895) | Poeciliopsis presidionis | Poeciliidae | Sinaloa livebearer |
| Girardinus pygmaeus | Rivas, 1944 | Girardinus metallicus | Poeciliidae | Metallic livebearer |
| Girardinus reticulatus | (Peters, 1859) | Poecilia reticulata | Poeciliidae | Guppy |
| Girardinus serripenis | (Rivas, 1958) | Girardinus creolus | Poeciliidae | Creole topminnow |
| Girardinus sonoriensis | Girard, 1859 | Poeciliopsis sonoriensis | Poeciliidae | Sonora topminnow |
| Girardinus uninotatus | Poey, 1860 | Girardinus uninotatus | Poeciliidae | Singlespot topminnow |
| Girardinus versicolor | Günther, 1866 | Limia versicolor | Poeciliidae | Varicolored limia |