Vieira's titi monkey (Plecturocebus vieirai) is a species of titi, a type of New World monkey, from central-northern Brazil. == Taxonomy == Vieira's titi belongs to the New World monkey family Pitheciidae, which contains the titis (Callicebus), saki monkeys (Pithecia), bearded sakis (Chiropotes), and uakaris (Cacajao). == Etymology == Plecturocebus vieirai is named after Professor Carlos Octaviano da Cunha Vieira (1897‑1958), a Brazilian mammalogist and former Curator of the Mammal Collection at the Museum of Zoology of the University of São Paulo (MZUSP), Brazil.
