Eastern gorilla
Grauer's gorillas and mountain gorillas were previously thought to be two of the three subspecies of one single species, the gorilla ("Gorilla gorilla"). However, genetic research has shown that the two eastern subspecies are far more closely related than the western subspecies: the western lowland gorilla ("G. gorilla gorilla"), which justified the separate classification. The two eastern subspecies are now classified as "G. beringei".
Caratinga
Some 150 northern muriquis (Brachyteles arachnoids) live today at the Fazenda Montes Claros, near Caratinga. It is one of their last refuges. The muriqui is the largest monkey of the Americas and one of the most endangered primates of the world. Specialists cite the biological importance of the Fazenda Montes Claros, where three other primate species live along with the muriqui: the buffy headed marmoset, the black-capped capuchin and the brown howler monkey.