n = 27
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Basilichthys andinus | Lahille, 1929 | Odontesthes hatcheri | Atherinopsidae | |
| Basilichthys archaeus | (Cope, 1878) | Basilichthys archaeus | Atherinopsidae | |
| Basilichthys australis | Eigenmann, 1928 | Basilichthys australis | Atherinopsidae | |
| Basilichthys beardsleei | (Abbott, 1899) | Basilichthys semotilus | Atherinopsidae | |
| Basilichthys bonariensis | (Valenciennes, 1835) | Odontesthes bonariensis | Atherinopsidae | Argentinian silverside |
| Basilichthys bonariensis argentinensis | (Valenciennes, 1835) | Odontesthes argentinensis | Atherinopsidae | |
| Basilichthys bonariensis charruanus | Lahille, 1929 | Odontesthes argentinensis | Atherinopsidae | |
| Basilichthys bonariensis chascomunensis | Lahille, 1929 | Odontesthes bonariensis | Atherinopsidae | Argentinian silverside |
| Basilichthys bonariensis propinquus | Lahille, 1929 | Odontesthes argentinensis | Atherinopsidae | |
| Basilichthys bonariensis puntanus | Lahille, 1929 | Odontesthes bonariensis | Atherinopsidae | Argentinian silverside |
| Basilichthys charruanus | Lahille, 1929 | Odontesthes argentinensis | Atherinopsidae | |
| Basilichthys chascomunensis | Lahille, 1929 | Odontesthes bonariensis | Atherinopsidae | Argentinian silverside |
| Basilichthys gracilis | (Steindachner, 1898) | Odontesthes gracilis | Atherinopsidae | |
| Basilichthys hatcheri andinus | Lahille, 1929 | Odontesthes hatcheri | Atherinopsidae | |
| Basilichthys jordani | Abbott, 1899 | Odontesthes regia | Atherinopsidae | Chilean silverside |
| Basilichthys madrynensis | Lahille, 1929 | Odontesthes smitti | Atherinopsidae | |
| Basilichthys malvinensis | Marrero, 1950 | Odontesthes nigricans | Atherinopsidae | |
| Basilichthys microather | Marrero y Galindez, 1950 | Odontesthes perugiae | Atherinopsidae | |
| Basilichthys microlepidotus | (Jenyns, 1841) | Basilichthys microlepidotus | Atherinopsidae | |
| Basilichthys octavius | Abbott, 1899 | Odontesthes regia | Atherinopsidae | Chilean silverside |
| Basilichthys patagonicus | Marrero, 1950 | Odontesthes hatcheri | Atherinopsidae | |
| Basilichthys propinquus | Lahille, 1929 | Odontesthes argentinensis | Atherinopsidae | |
| Basilichthys puntanus | Lahille, 1929 | Odontesthes bonariensis | Atherinopsidae | Argentinian silverside |
| Basilichthys regillus | Abbott, 1899 | Odontesthes regia | Atherinopsidae | Chilean silverside |
| Basilichthys semotilus | (Cope, 1874) | Basilichthys semotilus | Atherinopsidae | |
| Basilichthys smitti | Lahille, 1929 | Odontesthes smitti | Atherinopsidae | |
| Basilichthys smitti australis | Lahille, 1929 | Odontesthes smitti | Atherinopsidae |