After Feduccia, 1980, 1996, Olson, 1985, Sibley & Monroe, 1990, Dyke, 2001, Peterson, 2002, and Mayr, 2003

<==o Apodiformes Peters, 1940 (housemartins, hummingbirds, and relatives; kirskulinnut)
   |--o †Aegialornithidae [paraphyletic]
   |  |--o †Aegialornis
   |  |  |-- †A. gallicus [=? Cypselavus gallicus Gaillard, 1908]
   |  |  |-- †A. leenhardti
   |  |  |-- †A. wetmorei
   |  |  `-- †A. broweri
   |  `-- †Primapus lacki Harrison & Walker
   |-- †Eocypselus vincenti Harrison
   `--o  Apodiformes sensu stricto
      |--o Trochili [Trochiliformes] (kolibrit)
      |  |?- †Palescyvus escampensis [paraphyletic Jungornithidae Karhu, 1988]
      |  |--o †Cypselavidae
      |  |  |-- †Cypselavus gallicus Gaillard, 1908
      |  |  |-- †Argornis caucasicus Karhu 1999 [paraphyletic Jungornithidae Karhu, 1988]
      |  |  `-- †Parargornis
      |  `--+-- †Jungornis tesselatus Karhu, 1988 [paraphyletic Jungornithidae Karhu, 1988]
      |     `-- Trochilidae Vigors, 1825 (hummingbirds; kolibrit)
      `--o Apodi (kirskujat)
         |-- †Laputavis robusta (Dyke, 2001a) Dyke, 2001b; M. Eoc. WEu. [†Laputa robusta Dyke, 2001a (non Laputa, jr. synon. of Paramonacanthus (Actinopterygii: Perciformes: Monacanthidae))]
         `--+--o Hemiprocne Nitzsch, 1829 [Hemiprocnidae] (puukiitäjät, -kirskujat) [4]
            |  |-- H. coronata (Tickell, 1833) (Crested Treeswift)
            |  |-- H. longipennis (Rafinesque, 1802) (töyhtökiitäjä)
            |  |-- H. mystacea (Lesson, 1827) (isopuukiitäjä)
            |  `-- H. comata (Temminck, 1824) (pikkupuukiitäjä)
            `--+?- †Eocypselus vincenti Harrison
               |--o †Scaniacypselus Harrison, 1984; M. Eoc. WEu. [paraphyletic Aegialornithidae]
               |  |-- †S. wardi Harrison, 1984
               |  `-- †S. szarskii (Peters, 1985) Meyr & Peters, 1999 [Aegialornis szarskii Peters, 1985; Primapus szarskii (Peters, 1985) Mourer-Chauviré, 1988]
               `--o Apodidae (kirskujat)
                  |-- Cypseloidinae (Nokikirskujat, -kiitäjät) [2/14]
                  `-- Apodinae (varsinaiset kirskujat, kiitäjät) [17/90]

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