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 Cercopithecinae Gray, 1821
                   Genus Cercopithecus Linnaeus, 1758 - guenons
                     Cercopithecus ascanius (Audebert, 1799) - Schmidt's guenon
                       1 [Cercopithecus ascanius ascanius]ᵀ (Audebert, 1799)
                       2 Cercopithecus ascanius atrinasus Machado, 1965
                       3 Cercopithecus ascanius katangae Lönnberg, 1919
                       4 Cercopithecus ascanius schmidti Matschie, 1892
                       5 Cercopithecus ascanius whitesidei Thomas, 1909