n = 7
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Gymnocorymbus bondi | (Fowler, 1911) | Gymnocorymbus bondi | Characidae | |
| Gymnocorymbus flaviolimai | Benine, Melo, Castro & Oliveira, 2015 | Gymnocorymbus flaviolimai | Characidae | |
| Gymnocorymbus latissimus | (Eigenmann, 1908) | Moenkhausia latissima | Characidae | |
| Gymnocorymbus nemopterus | Fowler, 1914 | Poptella longipinnis | Characidae | |
| Gymnocorymbus socolofi | Géry, 1964 | Gymnocorymbus bondi | Characidae | |
| Gymnocorymbus ternetzi | (Boulenger, 1895) | Gymnocorymbus ternetzi | Characidae | Black tetra |
| Gymnocorymbus thayeri | Eigenmann, 1908 | Gymnocorymbus thayeri | Characidae | False black tetra |