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
                     .1 Cercopithecus dryas group
                     .2 Cercopithecus diana group
                     .3 Cercopithecus mitis group
                     .4 Cercopithecus mona group
                     .5 Cercopithecus cephus group
                     .6 Cercopithecus lhoesti group
                     .7 Cercopithecus hamlyni group
                     .8 Cercopithecus neglectus group
                     01 Cercopithecus albogularis (Sykes, 1831) - Sykes' monkey
                     02 Cercopithecus ascanius (Audebert, 1799) - Schmidt's guenon
                     03 Cercopithecus campbelli Waterhouse, 1838 - Campbell's monkey
                     04 Cercopithecus cephus (C. Linnaeus, 1758) - moustached monkey
                     05 Cercopithecus denti Thomas, 1907 - Dent's monkey
                     06 Cercopithecus diana (C. Linnaeus, 1758) - Diana monkey
                     07 Cercopithecus doggetti Pocock, 1907
                     08 Cercopithecus dryas Schwartz, 1932 - dryas monkey
                     09 Cercopithecus erythrogaster Gray, 1866 - red-bellied monkey
                     10 Cercopithecus erythrotis Waterhouse, 1838 - red-eared monkey
                     11 Cercopithecus hamlyni Pocock, 1907 - owl-faced monkey
                     12 Cercopithecus kandti Matschie, 1905
                     13 Cercopithecus lhoesti P. Sclater, 1898[1899] - L'Hoest's monkey
                     14 Cercopithecus lowei Thomas, 1923
                     15 Cercopithecus mitis Wolf, 1822 - diademed monkey
                     16 Cercopithecus mona (Schreber, 1774) - mona monkey
                     17 Cercopithecus neglectus Schlegel, 1876 - De Brazza's monkey
                     18 Cercopithecus nictitans (C. Linnaeus, 1766) - greater white-nosed monkey
                     19 Cercopithecus petaurista (Schreber, 1774) - lesser white-nosed monkey
                     20 Cercopithecus pogonias Bennett, 1833 - crowned guenon
                     21 Cercopithecus preussi Matschie, 1898 - Preuss's monkey
                     22 Cercopithecus roloway (Schreber, 1774)
                     23 Cercopithecus sclateri Pocock, 1904
                     24 Cercopithecus solatus M.J.S. Harrison, 1988 - sun-tailed monkey
                     25 Cercopithecus wolfi A. Meyer, 1891 - Wolf's monkey