Collared titi in about 1904 from Maipures, which may have been a captive animal obtained in the village, since extensive and concerted efforts have failed to identify it for the entire area mentioned above; nor is it known by locals for this area. The nearest titi monkeys from Maipures in Colombia are found on the middle Tuparro River and south of the lower Vichada River. Outside of Colombia this species extends from the Napo River northward throughout the Ecuadorian and Peruvian Amazonia and throughout southern Venezuela to the Río Branco and the lower Río Negro in Brazil. South of the Amazon it
Caquetá titi titi and white-tailed titi except that it does not have a white forehead bar, nor does it have the white hands and feet of the ornate titi. It also has a red beard. It has 22 chromosome pairs (not counting the sex chromosomes), with a diploid chromosome number of 2n=46. In the paper describing the species, the authors recommend that the species be classified as critically endangered by the International Union for Conservation of Nature (IUCN). According to the authors' estimate, the population size of the species may be fewer than 250 adult animals. It lives in forests fragmented by