After Olson, 1985, Feduccia, 1980, 1996, and Mourer-Chauviré, Tabuce, Mahboubi, Adaci & Bensalah, 2011

<==o Cariamae Fürbringer, 1888 [Cariamiformes (Wagler, 1830) Verheyen, 1957] (Seriemas, phorusrhacids and relatives; käärmekurjet ja forusrakit) [paraphyletic??!! (Olson, 1985)]
   |?-o †Bathornithidae Wetmore, 1933
   |  |?- †Eutreptornis uintae
   |  |--o †Bathornis
   |  |  |-- †B. veredus
   |  |  |?- †B. fax
   |  |  |-- †B. geographicus
   |  |  |-- †B. fricki
   |  |  `-- †B. grallator
   |  |--o †"Bathornis"
   |  |  |-- †"B." celeripes
   |  |  `-- †"B." cursor
   |  `--o †Paracrax
   |     |-- †P. antiqua
   |     |-- †P. wetmorei
   |     `-- †P. gigantea
   |?-o †Idiornithidae Brodkorb, 1965
   |  |?- †Gypsornis cuvieri
   |  |-- †Occitaniavis elatus (Milne-Edwards, 1892) [Geranopsis elatus Milne-Edwards, 1892]
   |  |-- †Oblitavis insolitus
   |  |-- †Propelargus cayluxensis
   |  |?-o †Elaphrocnemus
   |  |  |-- †E. phasianus
   |  |  |-- †E. crex
   |  |  |-- †E. bordkorbi
   |  |  `-- †E. sp.
   |  |--o †Ibidopodia Milne-Edwards, 1868
   |  |  |-- †I. palustris Milne-Edwards, 1868
   |  |  |?- ?†I. chavrochensis De Pietri & Mayr, 2014
   |  |  `?- ?†I. minuta De Pietri & Mayr, 2014
   |  `--o †Idiornis
   |     |-- †I. tuberculata
   |     |-- †I. gallicus
   |     |-- †I. cursor
   |     |-- †I. minor
   |     |-- †I. gaillardi
   |     |-- †I. gracilis
   |     `-- †I. itardiensis
   |?-o Cariamidae Bonaparte, 1850 (käärmekurjet; seriemas)
   |  |?- †Riacama caliginea
   |  |-- Cariama cristata ((Linnaeus, 1766) Brisson, 1760 (Red-legged Seriema; töyhtökäärmekurki)
   |  `--o Chunga Hartlaub, 1860 (pensaskäärmekurjet)
   |     |-- †C. incerta
   |     `-- C. burmeisteri ((Hartlaub, 1860) (Black-legged Seriema; pensaskäärmekurki)
   `--+--o †Strigogyps Gaillard, 1908
      |  |-- †S. dubius Gaillard, 1908
      |  |-- †S. robustus (Lambrecht, 1935) [Oocathartes robustus Lambrecht, 1935; Geiseloceros robustus Lambrecht, 1935]
      |  `-- †S. sapea (Peters, 1987) [Aenigmavis sapea Peters, 1987; Ameghinornis minor Mourer-Chauviré, 1981]
      `--o †Phororhacoidea Patterson 1941
         |?- †Lavocatavis africana Mourer-Chauviré, Tabuce, Mahboubi, Adaci & Bensalah, 2011; L.Pal.?-E.Eoc. NWNAf.
         `-- †Phorusrhacidae Ameghino, 1899 sensu Alvarenga & Höfling, 2003

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