Xingu Indigenous Park film "Xingu" (2012). The idea of creating a park originated with a round table organized by the vice president of Brazil in 1952, at which a much larger park was proposed. However, the state of Mato Grosso began granting land within the proposed area to colonizing companies, so the park that came into existence by decree 50.455 of 14 April 1961 was only a quarter of the proposed size. Adjustments were made on 31 July 1961, 6 August 1968 and 13 July 1971. The final demarcation of the perimeter was made in 1978. The area was given the designation of
Xingu-Tocantins-Araguaia moist forests 8 species of primates including the white-nosed saki ("Chiropotes albinasus"), red-handed tamarin ("Saguinus midas"), red-bellied titi ("Callicebus moloch"), Azara's night monkey ("Aotus azarae infulatus") and white-cheeked spider monkey ("Ateles marginatus"). The last two are endemic to this ecoregion and the Tapajós-Xingu moist forests to the west. Other species of mammals include white-lipped peccary ("Tayassu pecari"), collared peccary ("Pecari tajacu"), cougar ("Puma concolor"), jaguar ("Panthera onca"), South American tapir ("Tapirus terrestris"), brocket deer (genus "Mazama"), bare-tailed woolly opossum ("Caluromys philander"), and seven-banded armadillo ("Dasypus septemcinctus"). Endangered mammals include white-cheeked spider monkey ("Ateles marginatus"), black bearded saki ("Chiropotes satanas") and giant otter