Tropical and subtropical moist broadleaf forests

• Alto Paraná Atlantic forests (Argentina, Brazil, Paraguay)
• Araucaria moist forests (Argentina, Brazil)
• Atlantic Coast restingas (Brazil)
• Bahia coastal forests (Brazil)
• Bahia interior forests (Brazil)
• Caatinga Enclaves moist forests (Brazil)
• Fernando de Noronha-Atol das Rocas moist forests (Brazil)
• Guayanan Highlands moist forests (Brazil, Colombia, Guyana, Suriname, Venezuela)
• Guianan moist forests (Brazil, French Guiana, Guyana, Suriname, Venezuela)
• Guianan piedmont and lowland moist forests (Brazil, Venezuela)
• Gurupá várzea (Brazil)
• Iquitos várzea (Bolivia, Brazil, Peru)
• Japurá–Solimões–Negro moist forests (Brazil, Colombia, Venezuela)
• Juruá–Purus moist forests (Brazil)
• Madeira–Tapajós moist forests (Bolivia, Brazil)
• Marajó várzea (Brazil)
• Maranhão Babaçu forests (Brazil)
• Mato Grosso tropical dry forests (Brazil, Bolivia)
• Monte Alegre várzea (Brazil)
• Negro–Branco moist forests (Brazil, Colombia, Venezuela)
• Northeastern Brazil restingas (Brazil)
• Pernambuco coastal forests (Brazil)
• Pernambuco interior forests (Brazil)
• Purus várzea (Brazil)
• Purus–Madeira moist forests (Brazil)
• Serra do Mar coastal forests (Brazil)
• Solimões–Japurá moist forests (Brazil, Colombia, Peru)
• Southwest Amazon moist forests (Bolivia, Brazil, Peru)
• Tapajós–Xingu moist forests (Brazil)
• Tepuis (Brazil, Guyana, Suriname, Venezuela)
• Tocantins–Araguaia–Maranhão moist forests (Brazil)
• Uatuma–Trombetas moist forests (Brazil, Guyana, Suriname)
• Xingu–Tocantins–Araguaia moist forests (Brazil)

Tropical and subtropical dry broadleaf forests

• Atlantic dry forests (Brazil)
• Chiquitano dry forests (Bolivia, Brazil)

Tropical and subtropical grasslands, savannas, and shrublands

• Campos rupestres (Brazil)
• Cerrado (Bolivia, Brazil, Paraguay)
• Guianan savanna (Brazil, Guyana, Venezuela)
• Humid Chaco (Argentina, Brazil, Bolivia, Paraguay)
• Uruguayan savanna (Argentina, Brazil, Uruguay)

Flooded grasslands and savannas

• Pantanal (Bolivia, Brazil, Paraguay)

Deserts and xeric shrublands

• Caatinga (Brazil)
• Saint Peter and Saint Paul rocks (Brazil)

Mangrove

• Amapá mangroves (Brazil)
• Bahia mangroves (Brazil)
• Ilha Grande mangroves (Brazil)
• Pará mangroves (Brazil)
• Rio Piranhas mangroves (Brazil)
• Rio São Francisco mangroves (Brazil)

Orinoco bioregion

Amazonia bioregion

Eastern South America bioregion

Southern South America bioregion

Mangroves

by mangrove complex

Guiana/Orinoco Complex

• Eastern Morichal (Venezuela)
• Orinoco Delta (Venezuela)
• Southern Orinoco (Venezuela)
• Guiana Watershed (Brazil, French Guiana, Guyana, Suriname, Venezuela)

Amazon Complex

• Amazon Delta (Brazil)
• Amazon Main Channel (Brazil, Peru)
• Northern Amazon Shield Tributaries (Brazil)
• Rio Negro (Brazil, Colombia, Venezuela)
• Upper Amazon Piedmont (Bolivia, Colombia, Ecuador, Peru)
• Western Amazon Lowlands (Bolivia, Brazil, Peru)
• Central Brazilian Shield Tributaries (Bolivia, Brazil)
• Tocantins-Araguaia (Brazil)

Northeast Atlantic Complex

• Maranhao (Brazil)

Mata-Atlantica Complex

• Northeast Mata-Atlantica (Brazil)
• East Mata-Atlantica (Brazil)
• Southeast Mata-Atlantica (Brazil)

São Francisco Complex

• Caatinga (Brazil)
• Cerrado (Brazil)

Upper Parana Complex

• Alto Paraná Atlantic forests (Brazil)

Beni Savanna (Llanos de Moxos) Complex

• Llanos de Moxos (Bolivia, Brazil)

Paraguay-Parana Complex

• Pantanal (Bolivia, Brazil, Paraguay)
• Lower Parana (Argentina, Brazil, Paraguay, Uruguay)

Southern Atlantic Complex

• Jacui Highlands (Brazil, Uruguay)
• Lagoa dos Patos Coastal Plain (Brazil, Uruguay)

North Brazil Shelf

• Guianan marine ecoregion
• Amazonia

Tropical Southwestern Atlantic

• Sao Pedro and Sao Paulo Islands
• Fernando de Noronha and Atol das Rocas
• Northeastern Brazil marine ecoregion
• Eastern Brazil marine ecoregion
• Trindade and Martin Vaz Islands

Warm Temperate Southwestern Atlantic

• Southeastern Brazil
• Rio Grande