Opinions from K. Padian 2004
- 'Alvarezsauridae belongs to Avialae'
- 'Alvarezsaurus belongs to Alvarezsauridae'
- 'Alvarezsaurus calvoi belongs to Alvarezsaurus'
- 'Ambiortus belongs to Ornithurae'
- 'Apatornis belongs to Ornithurae'
- 'Apsaravis belongs to Ornithurae'
- 'Apsaravis ukhaana belongs to Apsaravis'
- 'Archaeopterygidae belongs to Avialae'
- 'Archaeopteryx belongs to Archaeopterygidae'
- 'Archaeopteryx lithographica belongs to Archaeopteryx'
- 'Archaeopteryx oweni is a subjective synonym of Archaeopteryx lithographica'
- 'Archaeopteryx oweni belongs to Archaeopteryx' according to B. Petronievics 1921
- 'Jurapteryx recurva is a subjective synonym of Archaeopteryx lithographica'
- 'Archaeopteryx siemensii is recombined as Archaeornis siemensii' according to B. Petronievics 1917
- 'Archaeornis siemensii is a subjective synonym of Archaeopteryx lithographica'
- 'Archaeornis is a subjective synonym of Archaeopteryx'
- 'Archaeopteryx macrura is a subjective synonym of Archaeopteryx lithographica'
- 'Avisaurus belongs to Enantiornithes'
- 'Avisaurus archibaldi belongs to Avisaurus'
- 'Avisaurus gloriae belongs to Avisaurus'
- 'Baptornis belongs to Hesperornithiformes'
- 'Confuciusornis belongs to Confuciusornithidae'
- 'Confuciusornis dui belongs to Confuciusornis'
- 'Confuciusornis sanctus belongs to Confuciusornis'
- 'Confuciusornithidae belongs to Avialae'
- 'Enaliornis belongs to Hesperornithiformes'
- 'Enaliornis segdwicki belongs to Enaliornis'
- 'Enantiornis belongs to Enantiornithes'
- 'Enantiornis leali belongs to Enantiornis'
- 'Enantiornithes belongs to Avialae'
- 'Eoalulavis belongs to Enantiornithes'
- 'Eoalulavis hoyasi belongs to Eoalulavis'
- 'Epidendrosaurus belongs to Avialae'
- 'Epidendrosaurus ningchengensis belongs to Epidendrosaurus'
- 'Gargantuavis belongs to Ornithurae'
- 'Gargantuavis philoinos belongs to Gargantuavis'
- 'Gobipteryx belongs to Enantiornithes'
- 'Gobipteryx minuta belongs to Gobipteryx'
- 'Griphosaurus is a subjective synonym of Archaeopteryx'
- 'Griphosaurus problematicus is a subjective synonym of Archaeopteryx lithographica'
- 'Griphosaurus problematicus belongs to Griphosaurus' according to A. S. Woodward 1862
- 'Hesperornis belongs to Hesperornithiformes'
- 'Hesperornithiformes belongs to Ornithurae'
- 'Iberomesornis belongs to Enantiornithes'
- 'Iberomesornis romerali belongs to Iberomesornis'
- 'Ichthyornis belongs to Ichthyornithiformes'
- 'Ichthyornis dispar belongs to Ichthyornis'
- 'Ichthyornithes is corrected as Ichthyornithiformes and belongs to Ornithurae'
- 'Jurapteryx is a subjective synonym of Archaeopteryx'
- 'Mononychus olecranus is recombined as Mononykus olecranus'
- 'Mononykus belongs to Alvarezsauridae'
- 'Neuquenornis belongs to Enantiornithes'
- 'Ornithomimus minutus is a nomen dubium'
- 'Ornithothoraces belongs to Avialae'
- 'Ornithurae was reranked as a unranked clade and belongs to Ornithothoraces'
- 'Parvicursor belongs to Alvarezsauridae'
- 'Parvicursor remotus belongs to Parvicursor'
- 'Pasquiaornis belongs to Hesperornithiformes'
- 'Pasquiaornis hardiei belongs to Pasquiaornis'
- 'Pasquiaornis tankei belongs to Pasquiaornis'
- 'Patagonykus belongs to Alvarezsauridae'
- 'Patagonykus puertai belongs to Patagonykus'
- 'Patagopteryx belongs to Ornithothoraces'
- 'Patagopteryx deferrariisi belongs to Patagopteryx'
- 'Pelagornis barretti is recombined as Enaliornis barretti'
- 'Protarchaeopteryx belongs to Avialae'
- 'Protarchaeopteryx robusta belongs to Protarchaeopteryx'
- 'Rahona ostromi is recombined as Rahonavis ostromi'
- 'Rahonavis belongs to Avialae'
- 'Shuuvuia is corrected as Shuvuuia and belongs to Alvarezsauridae'
- 'Shuvuuia deserti belongs to Shuvuuia'
- 'Vorona belongs to Ornithothoraces'
- 'Vorona berivotrensis belongs to Vorona'
- 'Wellnhoferia belongs to Archaeopterygidae'
- 'Wellnhoferia grandis belongs to Wellnhoferia'
- 'Wyleyia is a nomen dubium'
- 'Wyleyia valdensis is a nomen dubium'