Mammalia Linnaeus, 1758 - mammals
   Theria Parker & Haswell, 1897
     Primates Linnaeus, 1758 - primates
       Haplorrhini Pocock, 1918 see Suborder Haplorhini Pocock, 1918
         Simiiformes Haeckel, 1866
           Platyrrhini Geoffroy Saint-Hilaire, 1812
             Pitheciidae Mivart, 1865
               Callicebinae Pocock, 1925
                 Callicebus Thomas, 1903 - titi monkeys
                   Callicebus brunneus (Wagner, 1842) - brown titi