"Vieira's Titi"@en . . . . "The Vieira's Titi, (Callicebus vieirai), is a new species of titi, a type of New World monkey, from central-northern Brazil."@en . . . "Callicebus vieirai"@en . . . . . . . . . "Central-northern Brazil"@en . . "Vieira's Titi"@en . . . . . "The Vieira's Titi, (Callicebus vieirai), is a new species of titi, a type of New World monkey, from central-northern Brazil."@en .