| Species | Name Used in Reference |
|---|---|
| Gymnotus carapo Linnaeus, 1758 | Gymnotus carapo (p. 14) |
| Gymnotus inaequilabiatus (Valenciennes, 1839) | Gymnotus inaequilabiatus (p. 16) |
| Gymnotus mamiraua Albert & Crampton, 2001 | Gymnotus mamiraua (p. 15) |
| Gymnotus ucamara Crampton, Lovejoy & Albert, 2003 | Gymnotus ucamara (p. 5;fig.3) |