After Wright, Schirtzinger, Matsumoto, Eberhard, Graves, Sanchez, Capelli, Müller, Scharpegge, Chambers & Fleischer, 2008, Mayr, 2007, 2011, and Dyke & Cooper, 2000, with Recent genera, species and subspecies from Peterson, 2016

<==o Psittaciformes Wagler, 1827 [Pan-Psittaciformes sensu Suh et al., 2011] (parrots; papukaijalinnut)
   |-- †Psittacopes lepidus Mayr & Daniels, 1998
   `--+--o †Quercypsitta Mourer-Chauviré, 1992 [Quercypsittidae Mourer-Chauviré, 1992]
      |  |-- †Q. sudrei Mourer-Chauviré, 1992
      |  `-- †Q. ivani Mourer-Chauviré, 1992
      `--+--o †Pseudasturidae Mayr, 1998a [=? Halcyornithidae Harrison & Walker 1972]
         |  |-- †Pseudasturides macrocephalus (Mayr, 1998) Mayr, 2003 [Pseudastur macrocephalus Mayr, 1998a (preocc.)]
         |  |-- †Serudaptus pohli Mayr, 2000b
         |  `--o †Pulchrapollia Dyke & Cooper, 2000
         |     |?- †P. olsoni (Feduccia & Martin, 1976) [†“Primobucco” olsoni Feduccia & Martin, 1976]
         |     `-- †P. gracilis Dyke & Cooper, 2000 [could be jr. synon. to P. olsoni (Mayr, 2002)] (beautiful parrot, “graceful; gracile pretty polly”!!)
         `--o Psittaciformes Wagler, 1827 sensu stricto [sensu Dyke & Cooper, 2000] [Psittacidae sensu tradionalis] (modern parrots; nykypapukaijat)
            |--o Strigopidae Bonaparte, 1849 [incl. Nestoridae Bonaparte, 1849] [Strigopoidea Bonaparte, 1849; Nestoroidea Bonaparte, 1849 Christidis & Boles, 2008] (kakapo, kaka´s & kea)
            |  |-- Strigops habroptilus GR Gray, 1845 (kakapo, pöllöpapukaija) [Strigopinae]
            |  `--o Nestorinae Bonaparte, 1849 [Nestoridae Bonaparte, 1849]
            |     |--o †Nelepsittacus Worthy, Tennyson & Scoffeld, 2011
            |     |  |-- †Nel. daphneleeae Worthy, Tennyson & Scoffeld, 2011
            |     |  |-- †Nel. donmertoni Worthy, Tennyson & Scoffeld, 2011
            |     |  |-- †Nel. minimus Worthy, Tennyson & Scoffeld, 2011
            |     |  `?- †Nel. sp. [Worthy, Tennyson & Scoffeld, 2011]
            |     `--o Nestor Lesson, 1830 (kea's and kaka's; keat ja kaka) [Nestorinae]
            |        |-- Nes. notabilis Gould, 1856 (kea)
            |        `--+-- †Nes. productus Gould, 1836(Norfolk Island Kaka)
            |           |?- †Nes. sp. [<Chatham Islands>]
            |           `--o Nes. meridionalis Gmelin, 1788 (kaka)
            |              |-- Nes. m. meridionalis Gmelin, 1788 (North Island Kaka)
            |              `-- Nes. m. septentrionalis von Liburnau, 1896 (South Island Kaka)
            `--+-- Cacaduidae GR Gray, 1840 [Cacatuoidea GR Gray, 1840] (cockatoos; kakadut)
               `--o Psittacoidea Rafinesque-Schmaltz, 1815
                  `==o Psittrichasiidae Boetticher, 1959 (1854) [Psittrichasidae (nomen rejiciendum); Dasyptilidae Bonaparte, 1854][paraphyletic sensu Wright et al., 2008, often included to Psittaculidae]
                     |--o Coracopsis Wagler, 1832 [jr. synon. Mascarinus] [Coracopsinae Joseph, Toon, Schirtzinger, Wright & Schodde, 2012 [Coracopinae (sic) Wolters, 1975 (nomen nudum)]] (Vasa parrots; mustakaijat)
                     |  |--o C. vasa (Shaw, 1812) (greater vasa parrot; isomustakaija)
                     |  |  |-- C. v. comorensis (Peters, 1854)
                     |  |  |-- C. v. drouhardi Lavauden, 1929
                     |  |  `-- C. v. vasa (Shaw, 1812)
                     |  `--+-- C. barklyi Newton, 1867 (Seychelles black parrot; saychellienmustakaija)
                     |     `--+-- †Mascarinus mascarinus, (Linnaeus, 1771) Lesson, 1830 [Mascarinus mascarin] (Mascarene parrot; madagaskarinkaija)
                     |        `--o C. nigra (Linnaeus, 1758) (lesser vasa parrot; black parrot; pikkumustakaija)
                     |           |-- C. n. sibilans Milne-Edwards & Oustalet 1885 (Comoro parrot)
                     |           `--+-- C. n. libs Bangs 1927
                     |              `-- C. n. nigra (Linnaeus) 1758
                     `--+-- Psittrichas fulgidus (Lesson, 1830) Lesson, 1831 [Dasyptilus Wagler, 1832] [Psittrichasinae Boetticher, 1959 (1854)] (Pesquet's Parrot; kaljunaamakaija)
                        `--+-- Psittacidae Rafinesque-Schmaltz, 1815 (parrots; papukaijat)
                           `-- Psittaculidae Vigors, 1825 [Palaeornithidae Vigors, 1825 (nomen rejiciendum); Loriidae] (lories and lorikeets; lorit & pikkukaijaset)

Psittaciformes incertae sedis:

Halcyornis toliapicus Koenig, 1825
    †Paleopsittacus georgei Harrison, 1982b

    †Vastanavidae Mayr, Rana, Rose, Sahni, Kumar, Singh & Smith, 2010
        †Vastanavis cambayensis Mayr, Rana, Rose, Sahni, Kumar, Singh & Smith, 2010

    †Messelasturidae Mayr, 2005a
        †Messelastur gratulator Peters 1994
        †Tynskya eocaena Mayr 2000

    Psittaciformes sensu strictoArchaeopsittacus verreauxi (Milne-Edwards, 1867–1871)
        †Mogontiacopsitta miocaena Mayr, 2010a
        †Xenopsitta fejfari Mlíkovský, 1998
        †Pararallus dispar (Milne-Edwards, 1867–1871 [1869]) [Psittacus lartetianus Milne-Edwards, 1872]
        †Bavaripsitta ballmanni Mayr and Göhlich, 2004
        †“Conuropsisfratercula Wetmore, 1926

Alternative phylogeny of basal Psittaciformes after Mayr, 2002, with recent parrots from Brown & Toft, 1999

<==o Psittaciformes
   |?- †Precursor parvus
   |--o †Pseudasturidae
   |  |-- †Pseudasturides macrocephalus
   |  |-- †Serudaptus pohli
   |  `--o †Pulchrapollia
   |     |?- †P. olsoni
   |     `-- †P. gracilis
   `--+-- †Psittacopes
      |-- †Quercypsitta
      `--o “Psittacoidea”
         |-- Psittacidae
         `--+-- Loriidae
            `-- Cacaduidae

Reference(s):