Atlantic titi monkey
The Atlantic titi monkey or masked titi (Callicebus personatus) is a species of titi, a type of New World monkey, endemic to Brazil. Distribution and general features The Atlantic titi is part of the genus Callicebus which is composed of thirteen species and sixteen subspecies. Some more recent classifications of titis recognise many more species, and split the genus into three separate genera. The C. personatus group is retained in Callicebus. Three subspecies of Callicebus personatus have been described in scientific literature: C.p. melanochir, C.p. nigrifrons, and C.p. personatus, each of which has been treated as a full species by some authors. Atlantic titis are territorial, middle-sized, cebid monkeys; usually 1–2 kg in size. C. personatus are found primarily in the humid forests east of the Andes Mountains, specifically in the coastal, inland forests of south-eastern Brazil. The states they have been documented to dwell within include Bahia, Espírito Santo, Minas Gerais, Rio de Janeiro, and São Paulo. Of all the Callicebus species, Atlantic titi monkeys have the largest geographic range except for C. torquatus, covering approximately 1,000 kilometers. They customarily share their living area with other monkeys such as the lion tamarin and spider monkey. Subspecies variations The three