Milton's titi monkey (Callicebus miltoni), named after the Brazilian primatologist Milton Thiago de Mello, is a species of titi, a type of New World monkey, from southern Amazon rainforest, Brazil. It was discovered in 2011 by Julio César Dalponte, and recognized as a new species in 2014 (from the genus Callicebus thomas). Milton's titi differs from other titis by the following features: \n* a light gray line of forehead, \n* dark ocher sideburns and throat, \n* dark grey torso and flanks, \n* an orange tail.