| Ecosystem | Type | Status | Ref. |
|---|---|---|---|
| Amazon | River (basin) | native | 4716 |
| Marañón | River (basin) | native | 6329 |
| Neotropical | Zoogeographic realm | endemic | 36687 |
| Orinoco | River (basin) | native | 36687 |
| Paraguay | River (basin) | native | 36687 |
| Paraná | River (basin) | native | 36687 |
| Uruguay | River (basin) | native | 36687 |