freshwater ecoregions
   South America
     301 (Freshwater ecoregion) North Andean Pacific Slopes-Rio Atrato (Neotropic)
     302 (Freshwater ecoregion) Magdalena-Sinu (Neotropic)
     303 (Freshwater ecoregion) Maracaibo (Neotropic)
     304 (Freshwater ecoregion) South America Caribbean Drainages-Trinidad (Neotropic)
     305 (Freshwater ecoregion) Orinoco High Andes (Neotropic)
     306 (Freshwater ecoregion) Orinoco Piedmont (Neotropic)
     307 (Freshwater ecoregion) Orinoco Llanos (Neotropic)
     308 (Freshwater ecoregion) Orinoco Guiana Shield (Neotropic)
     309 (Freshwater ecoregion) Orinoco Delta and Coastal Drainages (Neotropic)
     310 (Freshwater ecoregion) Essequibo (Neotropic)
     311 (Freshwater ecoregion) Guianas (Neotropic)
     312 (Freshwater ecoregion) Amazonas High Andes (Neotropic)
     313 (Freshwater ecoregion) Western Amazon Piedmont (Neotropic)
     314 (Freshwater ecoregion) Rio Negro (Neotropic)
     315 (Freshwater ecoregion) Amazonas Guiana Shield (Neotropic)
     316 (Freshwater ecoregion) Amazonas Lowlands (Neotropic)
     317 (Freshwater ecoregion) Ucayali-Urubamba Piedmont (Neotropic)
     318 (Freshwater ecoregion) Mamore-Madre de Dios Piedmont (Neotropic)
     319 (Freshwater ecoregion) Guapore-Itenez (Neotropic)
     320 (Freshwater ecoregion) Tapajos-Juruena (Neotropic)
     321 (Freshwater ecoregion) Madeira Brazilian Shield (Neotropic)
     322 (Freshwater ecoregion) Xingu (Neotropic)
     323 (Freshwater ecoregion) Amazonas Estuary and Coastal Drainages (Neotropic)
     324 (Freshwater ecoregion) Tocantins-Araguaia (Neotropic)
     325 (Freshwater ecoregion) Parnaiba (Neotropic)
     326 (Freshwater ecoregion) Northeastern Caatinga and Coastal Drainages (Neotropic)
     327 (Freshwater ecoregion) S. Francisco (Neotropic)
     328 (Freshwater ecoregion) Northeastern Mata Atlantica (Neotropic)
     329 (Freshwater ecoregion) Paraiba do Sul (Neotropic)
     330 (Freshwater ecoregion) Ribeira de Iguape (Neotropic)
     331 (Freshwater ecoregion) Southeastern Mata Atlantica (Neotropic)
     332 (Freshwater ecoregion) Lower Uruguay (Neotropic)
     333 (Freshwater ecoregion) Upper Uruguay (Neotropic)
     334 (Freshwater ecoregion) Laguna dos Patos (Neotropic)
     335 (Freshwater ecoregion) Tramandai-Mampituba (Neotropic)
     336 (Freshwater ecoregion) Central Andean Pacific Slopes (Neotropic)
     337 (Freshwater ecoregion) Titicaca (Neotropic)
     338 (Freshwater ecoregion) Atacama (Neotropic)
     339 (Freshwater ecoregion) Mar Chiquita-Salinas Grandes (Neotropic)
     340 (Freshwater ecoregion) Cuyan - Desaguadero (Neotropic)
     341 (Freshwater ecoregion) South Andean Pacific Slopes (Neotropic)
     342 (Freshwater ecoregion) Chaco (Neotropic)
     343 (Freshwater ecoregion) Paraguay (Neotropic)
     344 (Freshwater ecoregion) Upper Parana (Neotropic)
     345 (Freshwater ecoregion) Lower Parana (Neotropic)
     346 (Freshwater ecoregion) Iguassu (Neotropic)
     347 (Freshwater ecoregion) Bonaerensean Drainages (Neotropic)
     348 (Freshwater ecoregion) Patagonia (Neotropic)
     349 (Freshwater ecoregion) Valdivian Lakes (Neotropic)
     350 (Freshwater ecoregion) Galapagos Islands (Neotropic)
     351 (Freshwater ecoregion) Juan Fernandez Island (Neotropic)
     352 (Freshwater ecoregion) Fluminense (Neotropic)