Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Primates Linnaeus, 1758 - primates
       Suborder Haplorrhini Pocock, 1918 see Suborder Haplorhini Pocock, 1918
         Infraorder Simiiformes Haeckel, 1866
           Parvorder Platyrrhini Geoffroy Saint-Hilaire, 1812
             Family Pitheciidae Mivart, 1865
               Subfamily Callicebinae Pocock, 1925
                 Genus Callicebus Thomas, 1903 - titi monkeys
                   Callicebus personatus (É. Geoffroy Saint-Hilaire, in Humboldt, 1812) - masked titi