Ecoregions
| ID | Realm | Major Habitat Type | Ecoregion |
|---|---|---|---|
| 328 | Neotropic | Tropical and subtropical coastal rivers | Northeastern Mata Atlantica |
| 329 | Neotropic | Tropical and subtropical coastal rivers | Paraiba do Sul |
| 330 | Neotropic | Tropical and subtropical coastal rivers | Ribeira de Iguape |
| 331 | Neotropic | Tropical and subtropical coastal rivers | Southeastern Mata Atlantica |
| 332 | Neotropic | Tropical and subtropical upland rivers | Lower Uruguay |
| 333 | Neotropic | Tropical and subtropical upland rivers | Upper Uruguay |
| 334 | Neotropic | Temperate coastal rivers | Laguna dos Patos |
| 335 | Neotropic | Tropical and subtropical coastal rivers | Tramandai - Mampituba |
| 336 | Neotropic | Xeric freshwaters and endorheic (closed) basins | Central Andean Pacific Slopes |
| 337 | Neotropic | Xeric freshwaters and endorheic (closed) basins | Titicaca |
| 338 | Neotropic | Xeric freshwaters and endorheic (closed) basins | Atacama |
| 339 | Neotropic | Xeric freshwaters and endorheic (closed) basins | Mar Chiquita - Salinas Grandes |
| 340 | Neotropic | Montane freshwaters | Cuyan - Desaguadero |
| 341 | Neotropic | Temperate coastal rivers | South Andean Pacific Slopes |
| 342 | Neotropic | Tropical and subtropical floodplain rivers and wetland complexes | Chaco |