The gray-necked night monkey (Aotus infulatus) and spider monkey (Ateles marginatus) are endemic to this region and the interfluve to the west.    From Wordnik.com.  [Xingu-Tocantins-Araguaia moist forests] Reference

The tiny titi monkey (Callicebus moloch) also occurs here, and the gray-necked night monkey (Aotus infulatus) and spider monkey (Ateles marginatus) are endemic to this and the interfluve to the east.    From Wordnik.com.  [Tapajós-Xingu moist forests] Reference

Also present are three other species of monkey including long-haired spider monkey Ateles belzebuth (VU), white-fronted capuchin monkey Cebus albifrons cuscinus (DD), night monkey Aotus trivirgatus and howler monkey Alouatta seniculus.    From Wordnik.com.  [Rio Abiseo National Park, Peru] Reference

The nine primates include howler monkeys Alouatta seniculus, night monkeys Aotus trivirgatus, titi monkeys Callicebus torquatus, black uakari Cacajao melanocephalus, weeper capuchins Cebus olivaceus, and white-faced sakis Pithecia pithecia.    From Wordnik.com.  [Canaima National Park, Venezuela] Reference

Meanwhile, the nocturnal and incredibly large eyed Aotus may have a large brain because of the "ratchet effect," the tendency for brains to stay large once they've evolved to that size because of the cognitive advantages which presumably outweigh the metabolic cost of maintaining it.    From Wordnik.com.  [Flies are More Interesting...] Reference

Primate Factsheets: Owl monkey (Aotus) Taxonomy, Morphology, & Ecology.    From Wordnik.com.  [Frugivore] Reference

The winding narrow-leaved Kennedyas, Gnaphaliums in abundance; Aotus in low bushes.    From Wordnik.com.  [Journal of an Overland Expedition in Australia : from Moreton Bay to Port Essington, a distance of upwards of 3000 miles, during the years 1844-1845] Reference

Aotus nancymai monkeys strongly correlates with anti-MSP1 antibody titer and in vitro parasite-inhibitory activity.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

Larger mammals include tapirs (Tapirus terrestris), collared peccaries (Tayassu tajacu), white-lipped peccaries (Tayassu pecari), 13 primates including the night monkey (Aotus vociferans), a white-faced saki (Pithecia monachus), and a regionally endemic tamarin (Saguinus inustus).    From Wordnik.com.  [Caqueta moist forests] Reference

This number includes 9 primates that live here including howler monkeys (Alouatta seniculus), night monkeys (Aotus trivirgatus), titi monkeys (Callicebus torquatus), black uakari (Cacajao melanocephalus), weeper capuchins (Cebus olivaceus), and white-faced sakis (Pithecia pithecia).    From Wordnik.com.  [Tepuis] Reference

Other mammals that are found only in this ecoregion, or in few other places, include an armadillo Dasypus septemcinctus, bats (Platyrrhinus recifinus, Natalus stramineus, and Molossops greenhalli), primates such as marmosets (Callithrix argentatado), tamarins (Saguinus midas), night monkeys (Aotus infulatus), and savanna foxes (Cerdocyon thous).    From Wordnik.com.  [Marajó varzea] Reference

This ecoregion represents range limits for many species, such as the night monkey (Aotus spp.) who doesn’t oocur north of this region, and of many birds which have wider distributions in South America, including the saffron-headed parrot (Pionopsitta pyrilia), oilbird (Steatornis caripensis), and golden-headed Quetzal (Pharomacrus auriceps).    From Wordnik.com.  [Eastern Panamanian montane forests] Reference

The woolly monkey (Lagothrix lagotricha), classified as Vulnerable by the IUCN Red List, was the most researched of Colombia's monkeys, while the least studied species included: Goeldi's marmoset (Callimico goeldii), also Vulnerable; Geoffroy's tamarin (Saguinus geoffroyi); the white-headed capuchin (Cebus capucinus); Brumback's night monkey (Aotus brumbacki), considered Vulnerable; and Geoffroy's spider monkey (Ateles geoffroyi), classified as Endangered.    From Wordnik.com.  [EcoEarth.Info Environment RSS Newsfeed] Reference

Among the large mammals we find: maned wolf (Chrysocyon brachyurus), black howler monkey (Alouatta caraya), Azara's night monkey (Aotus azarae), pecaries (Tayssu pecari and T. tajacu), giant anteater (Mymercophaga tridactyla), capybara (Hydrochaerys hydrochaeris), deer (Mazama sp), marsh deer (Blastocerus dichotomus), pampas deer (Ozotoceros bezoarticus), puma (Felis concolor), and jaguar (Panthera onca).    From Wordnik.com.  [Humid Chaco] Reference

Various mammals that occur here and are not found elsewhere in Amazonia include the marsh deer, maned wolf, central South American seasonal forest primates (Alouatta caraya, Aotus azarai, Callicebus donacophilus, C. modestus, C. olallae, and Callithrix melanura), rodents (Akodon dayi, Kunsia tomentosus, and Oxymycterus inca), four species of opossums (Monodelphis kunsi, Marmosops dorothea, Lutreolina crassicaudata, and Gracilinanus agilis), various bats (Vampyrum spectrum, Phyllostomus hastatus, and Micronycteris behnii, and several species of Platyrrhinus, Molossops temminckii).    From Wordnik.com.  [Beni savanna] Reference