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 Semnopithecus Desmarest, 1822 - Hanuman langur
                     1 Semnopithecus ajax (Pocock, 1928)
                     2 Semnopithecus dussumieri I. Geoffroy, 1843
                     3 Semnopithecus entellus (Dufresne, 1797) - Hanuman langur
                     4 Semnopithecus hector (Pocock, 1928)
                     5 Semnopithecus hypoleucos Blyth, 1841
                     6 Semnopithecus priam Blyth, 1844
                     7 Semnopithecus schistaceus Hodgson, 1840