n = 29
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Metynnis altidorsalis | Ahl, 1923 | Metynnis altidorsalis | Serrasalmidae | |
| Metynnis anisurus | Ahl, 1924 | Metynnis lippincottianus | Serrasalmidae | |
| Metynnis argenteus | Ahl, 1923 | Metynnis argenteus | Serrasalmidae | |
| Metynnis calichromus | Ahl, 1923 | Metynnis hypsauchen | Serrasalmidae | Silver dollar |
| Metynnis calichromus schreitmuelleri | Ahl, 1922 | Metynnis hypsauchen | Serrasalmidae | Silver dollar |
| Metynnis cuiaba | Pavanelli, Ota & Petry, 2009 | Metynnis cuiaba | Serrasalmidae | |
| Metynnis dungerni | Ahl, 1925 | Metynnis lippincottianus | Serrasalmidae | |
| Metynnis ehrhardti | Ahl, 1927 | Metynnis hypsauchen | Serrasalmidae | Silver dollar |
| Metynnis eigenmanni | Ahl, 1923 | Metynnis argenteus | Serrasalmidae | |
| Metynnis fasciatus | Ahl, 1931 | Metynnis fasciatus | Serrasalmidae | |
| Metynnis goeldii | Eigenmann, 1903 | Metynnis lippincottianus | Serrasalmidae | |
| Metynnis guaporensis | Eigenmann, 1915 | Metynnis guaporensis | Serrasalmidae | |
| Metynnis heinrothi | Ahl, 1924 | Metynnis lippincottianus | Serrasalmidae | |
| Metynnis hypsauchen | (Müller & Troschel, 1844) | Metynnis hypsauchen | Serrasalmidae | Silver dollar |
| Metynnis lippincottianus | (Cope, 1870) | Metynnis lippincottianus | Serrasalmidae | |
| Metynnis longipinnis | Zarske & Géry, 2008 | Metynnis longipinnis | Serrasalmidae | |
| Metynnis luna | Cope, 1878 | Metynnis luna | Serrasalmidae | |
| Metynnis maculatus | (Kner, 1858) | Metynnis maculatus | Serrasalmidae | Spotted metynnis |
| Metynnis melanogrammus | Ota, Rapp Py-Daniel & Jégu, 2016 | Genus Species | New species | |
| Metynnis mola | Eigenmann & Kennedy, 1903 | Metynnis mola | Serrasalmidae | |
| Metynnis orbicularis | (Steindachner, 1908) | Metynnis lippincottianus | Serrasalmidae | |
| Metynnis orinocensis | (Steindachner, 1908) | Metynnis orinocensis | Serrasalmidae | |
| Metynnis otuquensis | Ahl, 1923 | Metynnis otuquensis | Serrasalmidae | |
| Metynnis polystictus | Zarske & Géry, 2008 | Metynnis polystictus | Serrasalmidae | |
| Metynnis roosevelti | Eigenmann, 1915 | Metynnis lippincottianus | Serrasalmidae | |
| Metynnis schreitmuelleri | Ahl, 1922 | Metynnis hypsauchen | Serrasalmidae | Silver dollar |
| Metynnis seitzi | Ahl, 1923 | Metynnis lippincottianus | Serrasalmidae | |
| Metynnis snethlagae | Ahl, 1924 | Metynnis lippincottianus | Serrasalmidae | |
| Metynnis unimaculatus | Steindachner, 1908 | Mylossoma unimaculatum | Serrasalmidae |