After Nowak, 1991, McKenna & Bell, 1997, and Norris & Musser, 2001

<==o Phalangeridae Thomas, 1888 [taxonomic history] (pussikiipijät)
   |?- †Cercaertus Burmeister, 1837 [=? Trichosurus Lesson, 1828 (McKenna & Bell, 1997)]
   |?- †Palaeoptaurus [=? †Palaeopetaurus, jr. synon. of Gymnobelideus (Petauridae)]
   |-- Ailurops ursinus Wagler, 1830 [non Ailurops Michaelles, 1830] [Ailuropinae Flannery, Archer & Maynes, in Archer, 1987] (karhukuskus) 
   `--o Phalangerinae Thomas, 1888
      |--o Strigocuscus Gray, 1862
      |  |?- †S. reidi Flannery & Archer, 1987
      |  |?- †S. notialis Flannery, Turnbull, Rich & Lundelius, 1987
      |  |--o S. celebensis (sulawesinkuskus)
      |  |  |?- S. c. feileri Groves, 1987
      |  |  `-- S. c. celebensis
      |  |-- S. pelengensis (“pelengsaartenkuskus”)
      |  |-- S. rothschildi (“obibesarsaartenkuskus”)
      |  |-- S. ornatus (Gray, 1860) (halmahera cuscus)
      |  `-- S. gymnotis (maakuskus)
      `--+--o Trichosurus Lesson, 1828 [Cercaertus Burmeister, 1837; Psilogrammurus Gloger, 1841; Trichurus Wagner, 1843 (lapsus calami)] (“kettukusut”)
         |  |-- †T. dicksoni Flannery & Archer, 1987
         |  |-- †T. hamiltonensis Flannery, Turnbull, Rich & Lundelius, 1987
         |  |--o T. vulpecula (Förster, 1913) (kettukusu)
         |  |  |-- T. v. vulpecula (Förster, 1913)
         |  |  |-- T. v. raui (Kerr, 1792)
         |  |  `-- T. v. fuliginosus
         |  |-- T. arnhemensis [T. vulpecula arnhemensis] (pohjankusu)
         |  `-- T. caninus (Ogilby, 1836) (koirakusu, bobuck)
         `--+-- Wyulda squamicaudata Alexander, 1919 (suomuhäntäkusu)
            `--+--o Spilocuscus Gray, 1862
               |  |-- S. rufoniger (mustatäpläkuskus)
               |  `-- S. maculatus (Desmarest, 1818) [Phalanger maculatus (Desmarest, 1818)] (täpläkuskus)
               `--o Phalanger Storr, 1780 [Phalangista G. Cuvier & É. Geoffroy Saint-Hilaire, 1795; Coescoes Lacépède, 1799; Balantia Illiger, 1811; Sipalus Fischer de Waldheim, 1813; Cuscus Lesson, 1826; Ceonyx Temminck, 1827] [incl. Eucuscus Gray, 1862]
                  |?- †P. alexandrae Flannery, 1996
                  |?-o †P. ornatus
                  |  |-- †P. o. ornatus
                  |  `-- †P. o. matabiru Flannery, 1996
                  |--o P. orientalis -species-group
                  |  |--o P. orientalis (Pallas, 1766) (samoanharmaakuskus; lowland gray cuscus; Samoan Islands cuscus)
                  |  |  |-- P. o. orientalis (Pallas, 1766)
                  |  |  |-- P. o. kori Menzies & Pernetta, 1986
                  |  |  |-- P. o. timorensis Menzies & Pernetta, 1986
                  |  |  `-- P. o. peninsulae Tate, 1945
                  |  |-- P. intercastellanus Thomas, 1895 (pohjanrannikkoharmaakuskus; East Papuan cuscus)
                  |  `-- P. mimicus (Thomas, 1922) (etelänrannikkoharmaakuskus; South Papuan cuscus)
                  |--o P. vestitus (silkkikuskus)
                  |  |-- P. v. vestitus (silkkikuskus)
                  |  `-- P. v. interpositus (steininkuskus)
                  |-- P. carmelitae (vuorikuskus)
                  |-- P. permixtio Menzies & Pernetta, 1986
                  |--o P. sericeus (silky cuscus)
                  |  |-- P. s. sericeus
                  |  `-- P. s. occidentalis Menzies & Pernetta, 1986
                  |-- P. lullulae (Thomas, 1896) (saarikuskus)
                  `-- P. matanim Flannery, 1987 (telefomin cuscus)

Reference(s):

 

Special thanks to:

Jos H. M. Dols, for gathering additional information and missing species.