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 Pitheciinae Mivart, 1865
                 Genus Pithecia Desmarest, 1804 - sakis
                   Pithecia monachus (É. Geoffroy Saint-Hilaire, 1812) - monk saki
                     1 [Pithecia monachus monachus]ᵀ (É. Geoffroy Saint-Hilaire, 1812)
                     2 Pithecia monachus milleri J.A. Allen, 1914