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 Trachypithecus Reichenbach, 1862 - brow-ridged langurs, leaf monkeys
                     Trachypithecus pileatus (Blyth, 1843)
                       1 [Trachypithecus pileatus pileatus]ᵀ (Blyth, 1843)
                       2 Trachypithecus pileatus brahma (Wroughton, 1916)
                       3 Trachypithecus pileatus durga (Wroughton, 1916)
                       4 Trachypithecus pileatus tenebricus (Wroughton, 1915)