| ລະບົບນິເວດ | ປະເພດ | ສະຖານະພາບ | ເອກະສານອ້າງອີງ |
|---|---|---|---|
| Amazon | River (basin) | native | 49716 |
| Iguazú River | River (basin) | native | 56308 |
| Machado | River (basin) | native | 97589 |
| Neotropical | Zoogeographic realm | endemic | 36692 |
| Paraná | River (basin) | native | 12225 |
| Uruguay | River (basin) | native | 56308 |