After Nowak, 1991, Wikipedia, 2012, and Hart et al., 2012

<==o Cercopithecini Gray, 1821 (marakatit)
   |--+--o Allochrocebus Elliot, 1913 sensu Hart et al., 2012 [Cercopithecus lhoesti-group]
   |  |  |-- A. lhoesti (P. Sclater, 1899) (L'Hoest's Guenon; valkokurkkumarakatti)
   |  |  |-- A. solatus (Harrison, 1988) [Cercopithecus solatus Harrison, 1988] (Sun-tailed Guenon; aurinkohäntämarakatti)
   |  |  `-- A. preussi (Matschie, 1898) (Preuss's Guenon; preussinmarakatti)
   |  `--+-- Erythrocebus patas (Schreber, 1775) Trouessart, 1897 [Simia patas Schreber, 1775] (Patas; Wadi monkey; Hussar monkey; husaariapina)
   |     `--o Chlorocebus Gray, 1870 [sg.? => Cercopithecus] (Vervet monkeys; tantalusmarakatit)
   |        |-- C. aethiops (Linnaeus, 1758) [Simia aethiops Linnaeus, 1758] (Grivet; tantalusmarakatti)
   |        |-- C. djamdjamensis Neumann, 1902 (Bale Mountains Vervet)
   |        |-- C. sabaeus (Linnaeus, 1766) [Simia sabaea Linnaeus, 1766] (Green Vervet; vihermarakatti)
   |        |--o C. tantalus Ogilby, 1841 (Tantalus monkey)
   |        |  |-- C. t. tantalus
   |        |  |-- C. t. budgetti
   |        |  `-- C. t. marrensis
   |        |-- C. cynosurus (Scopoli, 1786) (Malbrouck)
   |        `--o C. pygerythrus F. Cuvier, 1821 (Vervet monkey)
   |           |-- C. p. excubitor
   |           |-- C. p. hilgerti
   |           |-- C. p. nesiotes
   |           |-- C. p. pygerythrus
   |           `-- C. p. rufoviridis
   `--+-- Allenopithecus nigroviridis (Pocock, 1907) Lang, 1923 [Cercopithecus nigroviridis Pocock, 1907] (Allen's Swamp Monkey; suomarakatti)
      `--+--o Miopithecus I. Geoffroy, 1842 (Talapoin monkeys)
         |  |-- M. talapoin (Schreber, 1774) [Simia talapoin Schreber, 1774] (Talapoin, kellanvihreä kääpiömarakatti)
         |  `-- M. ogouensis Kingdon, 1997 (Gabon talapoin; Northern talapoin)
         `--o Cercopithecus Brunnich, 1772 (Guenon monkeys; aitomarakatit)
            |?-o C. diana-group
            |  |-- C. diana (Linnaeus, 1758) [Simia diana Linnaeus, 1758, incl. Simia faunus Linnaeus, 1758] (Diana's Guenon; dianamarakatti)
            |  `-- C. roloway (Schreber, 1774) (Roloway Guenon)
            |?-o C. dryas-group
            |  `-- C. dryas Schwartz, 1932 [C. salongo Thys van den Audenaerde, 1977] (Dryas Guenon; Zaire Diana monkey; Salonga monkey; ntolu; dryasmarakatti)
            |?-o C. neglectus-group
            |  `-- C. neglectus Schlegel, 1876 (De Brazza's Guenon; brazzanmarakatti)
            |?- C. sclateri Pocock, 1904 (Sclater's Guenon)
            |--o C. mona-group
            |  |?- C. campbelli Waterhouse, 1838 (Campbell's Guenon; campbellinmarakatti)
            |  |?- C. denti Thomas, 1907 (Dent's Guenon)
            |  |?- C. lowei Thomas, 1923 (Lowe's Guenon)
            |  |-- C. mona (Schreber, 1774) ( Mona Guenon; monamarakatti)
            |  `--+--o C. pogonias Bennett, 1833 (Crowned Guenon; töyhtömarakatti)
            |     |  |-- C. p. pogonias
            |     |  |-- C. p. nigripes
            |     |  |-- C. p. grayi
            |     |  `-- C. p. schwarzianus
            |     `--o C. wolfi A. Meyer, 1891 (Wolf's Guenon; wolfinmarakatti)
            |        |-- C. w. wolfi
            |        `-- C. w. elegans
            `--+--o C. hamlyni-group
               |  |-- C. lomamiensis Hart et al., 2012 (Lesula; lomamijoenmarakatti)
               |  `--o C. hamlyni Waterhouse, 1838 (Owl-faced Guenon; hamlyninmarakatti)
               |     |-- C. h. hamlyni (Owl-faced guenon)
               |     `-- C. h. kahuziensis (Kahuzi owl-faced guenon)
               `==o C. mitis-group
                  |--+?- C. doggetti Pocock, 1907 [Cercopithecus sibatoi Lorenz, 1913; ssp.? => C. mitis] (Silver Guenon; hopeamarakatti)
                  |  |?- C. kandti Matschie, 1905 [ssp.? => C. mitis] (Golden Guenon; kultamarakatti)
                  |  `--o C. mitis Wolf, 1822 (Somango Guenon; sinimarakatti)
                  |     |-- C. m. mitis (Pluto monkey; sinimarakatti)
                  |     `-- C. m. stuhlmanni
                  `--+--+--o C. nictitans (Linnaeus, 1766) (Greater Spot-nosed Guenon; täplänenämarakatti)
                     |  |  |-- C. n. nictitans (Linnaeus, 1766) (Greater Spot-nosed Guenon; täplänenämarakatti)
                     |  |  `-- C. n. martini (Bioko putty-nosed guenon)
                     |  `--o C. albogularis (Sykes, 1831) [ssp.=> C. mitis??] (Sykes's Guenon; sykesinmarakatti)
                     |     |-- C. a. albogularis (Zanzibar Sykes' monkey)
                     |     |-- C. a. albotorquatus (Pousargues' Sykes' monkey)
                     |     |-- C. a. erythrarchus (White-throated guenon)
                     |     |-- C. a. francescae
                     |     |-- C. a. kibonotensis
                     |     |-- C. a. kolbi [C. mitis kolbi]
                     |     |-- C. a. labiatus [=? C. mitis samango] (White-lipped monkey; Samango monkey)
                     |     |-- C. a. moloneyi
                     |     |-- C. a. monoides
                     |     |-- C. a. phylax
                     |     |-- C. a. schwarzi
                     |     ´-- C. a. zammaranoi (Zammarano's white-throated guenon)
                     `--o C. cephus-group
                        |--+-- C. erythrogaster Gray, 1866 (Red-bellied Guenon; punavatsamarakatti)
                        |  `--o C. petaurista (Schreber, 1774) (Lesser Spot-nosed Guenon;lyhytnenämarakatti)
                        |     |-- C. p. petaurista
                        |     `-- C. p. buettikoferi
                        `--+--o C. ascanius (Audebert, 1799) (Red-tailed Guenon; ascaniusmarakatti)
                           |  |-- C. a. ascanius
                           |  |-- C. a. atrinasus
                           |  |-- C. a. whitesidei
                           |  |-- C. a. katangae
                           |  `-- C. a. schmidti (Schmidt's guenon)
                           `--+--o C. erythrotis Waterhouse, 1838 [ssp.? => C. cephus?] (Red-eared Guenon; punakorvamarakatti)
                              |  |-- C. e. erythrotis (Bioko red-eared guenon)
                              |  `-- C. e. camerunensis
                              `--o C. cephus (Linnaeus, 1758) [Simia cephus Linnaeus, 1758] (Moustached Guenon; viiksimarakatti)
                                 |-- C. c. cephus
                                 |-- C. c. cephodes
                                 `-- C. c. ngottoensis (Ngotto guenon)

Reference(s):