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 Catarrhini Geoffroy Saint-Hilaire, 1812
             Superfamily Cercopithecoidea Gray, 1821
               Family Cercopithecidae Gray, 1821 - Old World monkeys
                 Subfamily Colobinae Jerdon, 1867
                   Genus Rhinopithecus Milne-Edwards, 1872 - snub-nosed langurs
                     1 Rhinopithecus avunculus (Dollman, 1912)
                     2 Rhinopithecus bieti Milne-Edwards, 1897 - Yunnan snub-nosed monkey
                     3 Rhinopithecus brelichi (Thomas, 1903)
                     4 Rhinopithecus roxellana (Milne-Edwards, 1870)