Opinions from E. N. Kurochkin 2000

  • 'Alexornis belongs to Alexornithidae'
  • 'Alexornithidae belongs to Alexornithiformes'
  • 'Alexornithiformes belongs to Enantiornithes'
  • 'Ambiortidae belongs to Ambiortiformes'
  • 'Ambiortiformes belongs to Palaeognathae'
  • 'Ambiortus belongs to Ambiortidae'
  • 'Ambiortus dementjevi belongs to Ambiortus' according to Kurochkin 1982
  • 'Ambiortus dementjevi belongs to Ambiortus'
  • 'Anseriformes belongs to Neognathae'
  • 'Asiahesperornis belongs to Asiahesperornithinae'
  • 'Asiahesperornis bazhanovi belongs to Asiahesperornis'
  • 'Asiahesperornithinae belongs to Hesperornithidae'
  • 'Avisauridae belongs to Alexornithiformes'
  • 'Avisaurus belongs to Avisauridae'
  • 'Baptornis belongs to Baptornithidae'
  • 'Baptornithidae belongs to Hesperornithiformes'
  • 'Enantiornis belongs to Avisauridae'
  • 'Enantiornis leali belongs to Enantiornis'
  • 'Enantiornis martini belongs to Enantiornis'
  • 'Enantiornis walkeri belongs to Enantiornis'
  • 'Enantiornithes was reranked as a infraclass and belongs to Sauriurae'
  • 'Enantiornithidae belongs to Alexornithiformes'
  • 'Fregatidae belongs to Pelecaniformes'
  • 'Gobipteryx belongs to Alexornithidae'
  • 'Gobipteryx minuta belongs to Gobipteryx'
  • 'Gruiformes belongs to Neognathae'
  • 'Gurilynia belongs to Enantiornithidae'
  • 'Gurilynia nessovi belongs to Gurilynia'
  • 'Hesperornidae is corrected as Hesperornithidae and belongs to Hesperornithiformes'
  • 'Hesperornis belongs to Hesperornithidae'
  • 'Hesperornis gracilis belongs to Hesperornis'
  • 'Hesperornis regalis belongs to Hesperornis'
  • 'Hesperornis rossica is corrected as Hesperornis rossicus and belongs to Hesperornis'
  • 'Hesperornithiformes belongs to Odontornithes'
  • 'Horezmavis belongs to Gruiformes'
  • 'Horezmavis eocretacea belongs to Horezmavis'
  • 'Ichthyornis maltshevskyi is recombined as Lenesornis maltshevskyi'
  • 'Judinornis belongs to Baptornithidae'
  • 'Judinornis nogontsavensis belongs to Judinornis'
  • 'Kizylkumavis belongs to Alexornithidae'
  • 'Kizylkumavis cretacea belongs to Kizylkumavis'
  • 'Kuszholia belongs to Kuszholiidae'
  • 'Kuszholia mengi belongs to Kuszholia'
  • 'Kuszholiidae belongs to Aves'
  • 'Lenesornis belongs to Alexornithidae'
  • 'Lestornis crassipes is recombined as Hesperornis crassipes'
  • 'Limnofregatinae belongs to Fregatidae'
  • 'Mononychus olecranus is recombined as Mononykus olecranus'
  • 'Mononykus belongs to Parvicursoridae'
  • 'Nanantius belongs to Alexornithidae'
  • 'Nanantius valifanovi belongs to Nanantius'
  • 'Neognathae belongs to Neornithes'
  • 'Neornithes was reranked as a infraclass and belongs to Ornithurae'
  • 'Neuquenornis belongs to Alexornithidae'
  • 'Odontornithes was reranked as a infraclass and belongs to Ornithurae'
  • 'Ornithurae belongs to Aves'
  • 'Otogornis belongs to Ambiortidae'
  • 'Otogornis genghisi belongs to Otogornis' according to L. Hou 1994
  • 'Otogornis genghisi belongs to Otogornis'
  • 'Palaeognathae belongs to Neornithes'
  • 'Parvicursor belongs to Parvicursoridae'
  • 'Parvicursor remotus belongs to Parvicursor'
  • 'Parvicursoridae belongs to Maniraptora'
  • 'Pelecaniformes belongs to Neognathae'
  • 'Platanavis belongs to Aves'
  • 'Platanavis nana belongs to Platanavis' according to Nessov 1992
  • 'Platanavis nana belongs to Platanavis'
  • 'Praeornis belongs to Praeornithidae'
  • 'Praeornis sharovi belongs to Praeornis' according to Rautian 1978
  • 'Praeornis sharovi belongs to Praeornis'
  • 'Praeornithes belongs to Aves'
  • 'Praeornithidae belongs to Praeornithiformes'
  • 'Praeornithiformes belongs to Praeornithes'
  • 'Presbyornithidae belongs to Anseriformes'
  • 'Sauriurae belongs to Aves'
  • 'Sazavis belongs to Alexornithidae'
  • 'Sazavis prisca belongs to Sazavis'
  • 'Soroavisaurus belongs to Avisauridae'
  • 'Volgavis belongs to Limnofregatinae'
  • 'Volgavis marina belongs to Volgavis'
  • 'Zhyraornis belongs to Alexornithidae'
  • 'Zhyraornis kashkarovi belongs to Zhyraornis'
  • 'Zhyraornis logunovi belongs to Zhyraornis'