The Petenes mangrove ecoregion forms a coastal corridor of wetlands in excellent state of preservation. This system forms a unique biogeographical area in Mexico, of great ecological value for its large faunistic and floristic diversity, including the unique Peten mangrove.
The Santa Marta montane forests is an ecoregion in the Sierra Nevada de Santa Marta, a massif on the Caribbean coast of northern Colombia. This montane ecoregion is a characteristic moist forest; however, it rises from very different habitat of xeric scrub and dry forest that surround it.
The Semiarid Pampas ecoregion is located in the center of Argentina. The predominant vegetation consists of grasslands with some shrubs. There are few endemic plants in the ecoregion but the area has a high biodiversity.
The Sinú Valley dry forests is an ecoregion in the north of Colombia. The region is known for its tremendous richness, in terms of biodiversity, due to the high number of species and level of endemism.
The Southern Andean Yungas is a tropical and subtropical moist broadleaf forest ecoregion in the Yungas of southwestern Bolivia and northwestern Argentina. It contains what may be the last of the isolated evergreen forests resulting from Quaternary glaciations.
The Southwest Amazon moist forests region covers an extensive area of the Upper Amazon Basin. The inaccessibility of this region, along with few roads, has kept most of the habitat intact. Also, there are a number of protected areas, which preserve this extremely biologically rich ecoregion.
The Tepui ecogregion, found in the Guiana Highlands of northern South America, is host to an archipelago of isolated sandstone plateaus and dramatic summits, atop nearly vertical escarpments. These dramatic features perforate an extensive matrix of highland savannas and rain forests.
The "selva parananese" or Upper Paraná Atlantic Forest is an ecoregion of the tropical moist forests biome and the South American Atlantic Forest biome. The ecoregion stretches across the borders of southern Brazil, eastern Paraguay and northeastern Argentina.