The white-tailed titi monkey (Plecturocebus discolor) is a species of titi monkey, a type of New World monkey, from South America. It is found in Colombia, Ecuador and Peru. It was described in 1848 as Callithrix discolor. References white-tailed titi Mammals of Peru Mammals of Ecuador Mammals of Colombia white-tailed titi white-tailed titi Taxa named by Isidore Geoffroy Saint-Hilaire