| Species | Name Used in Reference |
|---|---|
| Gymnotus chimarrao Cognato, Richer-de-Forges, Albert & Crampton, 2008 | Gymnotus chimarrao (p. 60;fig.11;tab1.) |
| Gymnotus cuia Craig, Malabarba, Crampton & Albert, 2018 | Gymnotus cuia (p. 55;fig.7;tab.1) |
| Gymnotus inaequilabiatus (Valenciennes, 1839) | Gymnotus inaequilabiatus (p. 67;fig.15;tab.2) |
| Gymnotus omarorum Richer-de-Forges, Crampton & Albert, 2009 | Gymnotus omarorum (p. 61;fig.12;tab.1) |
| Gymnotus pantanal Fernandes, Albert, Daniel-Silva, Lopes, Crampton & Almeida-Toledo, 2005 | Gymnotus pantanal (p. 63;fig.13;tab.1) |