1. Gran Chaco Plain:
- Located in central South America, covering parts of Argentina, Paraguay, Bolivia, and Brazil.
- Known for its vast grasslands, wetlands, and forests.
2. Llanos:
- Situated in northern South America, mainly in Colombia and Venezuela.
- Characterized by fertile grasslands, seasonally flooded savannas, and tropical forests.
3. Pampas:
- Found in central Argentina, known for its fertile soil and temperate climate.
- This region is considered the breadbasket of Argentina, with extensive agriculture.
4. Cerrado:
- Located in central Brazil, it is a savanna ecoregion with a mix of grasslands, woodlands, and forests.
- The Cerrado region is home to diverse flora and fauna.
5. Patagonian Plateau:
- Situated in southern Argentina, it is a semi-arid to arid region with rolling plains and tablelands.
- Known for its unique flora, including the Patagonian steppe and its iconic guanacos.
6. Brazilian Coastal Plain:
- Extends along the Atlantic coast of Brazil, from the Amazon River in the north to the Rio Grande do Sul in the south.
- This region features sandy beaches, mangrove forests, and fertile coastal lowlands.
7. Yungas:
- Located in northwestern Argentina and southeastern Bolivia, the Yungas region comprises narrow valleys and steep slopes with lush cloud forests.
- It is known for its high biodiversity and endemic species.