Class Mammalia Linnaeus, 1758 - mammals
   Order Primates Linnaeus, 1758 - primates
     Family Cebidae Bonaparte, 1831 - New World monkeys
       Subfamily Callicebinae Pocock, 1925
         Genus Callicebus Thomas, 1903 - titi monkeys
           01 Callicebus brunneus (Wagner, 1842) - brown titi
           02 Callicebus caligatus (Wagner, 1842)
           03 Callicebus cinerascens (Spix, 1823)
           04 Callicebus cupreus (Spix, 1823)
           05 Callicebus donacophilus (d'Orbigny, 1836)
           06 Callicebus dubius Hershkovitz, 1988
           07 Callicebus hoffmannsi Thomas, 1908
           08 Callicebus modestus Lönnberg, 1939
           09 Callicebus moloch (Hoffmannsegg, 1807) - dusky titi
           10 Callicebus oenanthe Thomas, 1924
           11 Callicebus olallae Lönnberg, 1939
           12 Callicebus personatus (É. Geoffroy Saint-Hilaire, in Humboldt, 1812) - masked titi
           13 Callicebus torquatus (Hoffmannsegg, 1807)