Opinions from P. W. Houde 1988
- 'Barawertornis belongs to Dromornithidae'
- 'Barawertornis tedfordi belongs to Barawertornis' according to Rich 1979
- 'Barawertornis tedfordi belongs to Barawertornis'
- 'Bullockornis belongs to Dromornithidae'
- 'Bullockornis planei belongs to Bullockornis'
- 'Diogenornis belongs to Opisthodactylidae'
- 'Diogenornis fragilis belongs to Diogenornis'
- 'Dromaius belongs to Dromaiidae'
- 'Dromaius ocypus belongs to Dromaius'
- 'Dromornis belongs to Dromornithidae'
- 'Dromornis australis belongs to Dromornis' according to Owen 1872
- 'Dromornis australis belongs to Dromornis'
- 'Dromornis stirtoni belongs to Dromornis'
- 'Eleutherornis belongs to Eleutherornithidae'
- 'Eremopezus belongs to Aepyornithidae'
- 'Eremopezus eocaenus belongs to Eremopezus'
- 'Eudromia belongs to Tinamidae'
- 'Eudromia olsoni belongs to Eudromia' according to Tambussi and Tonni 1985
- 'Eudromia olsoni belongs to Eudromia'
- 'Gastornis minor is recombined as Remiornis minor'
- 'Heterorhea belongs to Rheidae'
- 'Heterorhea dabbenei belongs to Heterorhea'
- 'Ilbandornis belongs to Dromornithidae'
- 'Ilbandornis lawsoni belongs to Ilbandornis' according to Rich 1979
- 'Ilbandornis lawsoni belongs to Ilbandornis'
- 'Ilbandornis woodburnei belongs to Ilbandornis' according to Rich 1979
- 'Ilbandornis woodburnei belongs to Ilbandornis'
- 'Lithornis belongs to Lithornithidae'
- 'Lithornis celetius belongs to Lithornis'
- 'Lithornis plebius belongs to Lithornis'
- 'Lithornis promiscuus belongs to Lithornis'
- 'Lithornis vulturinus belongs to Lithornis' according to Owen 1840
- 'Lithornis vulturinus belongs to Lithornis'
- 'Lithornithidae belongs to Lithornithiformes'
- 'Lithornithiformes belongs to Palaeognathae'
- 'Loncornis helveticus belongs to Eleutherornis'
- 'Nothura belongs to Tinamidae'
- 'Nothura parvulus belongs to Nothura' according to Rovereto 1914
- 'Nothura parvulus belongs to Nothura'
- 'Opisthodactylus belongs to Opisthodactylidae'
- 'Opisthodactylus patagonicus belongs to Opisthodactylus' according to Ameghino 1891
- 'Opisthodactylus patagonicus belongs to Opisthodactylus'
- 'Palaeotis belongs to Struthionidae'
- 'Palaeotis weigelti belongs to Palaeotis' according to Lambrecht 1928
- 'Palaeotis weigelti belongs to Palaeotis'
- 'Paracathartes belongs to Lithornithidae'
- 'Paracathartes howardae belongs to Paracathartes' according to Harrison 1979
- 'Paracathartes howardae belongs to Paracathartes'
- 'Pediorallus barbarae is a subjective synonym of Lithornis vulturinus'
- 'Pediorallus hookeri belongs to Pediorallus' according to Harrison 1984
- 'Pediorallus hookeri is recombined as Lithornis hookeri'
- 'Pediorallus nasi belongs to Pediorallus' according to Harrison 1984
- 'Pediorallus nasi is recombined as Lithornis nasi'
- 'Proceriavis belongs to Eleutherornithidae'
- 'Proceriavis martini belongs to Proceriavis' according to Harrison and Walker 1979
- 'Proceriavis martini belongs to Proceriavis'
- 'Promusophaga magnifica is a subjective synonym of Lithornis vulturinus'
- 'Pseudocrypturus belongs to Lithornithidae'
- 'Pseudocrypturus cercanaxius belongs to Pseudocrypturus'
- 'Querandiornis belongs to Tinamidae'
- 'Querandiornis romani belongs to Querandiornis' according to Rusconi 1958
- 'Querandiornis romani belongs to Querandiornis'
- 'Remiornis belongs to Palaeognathae'
- 'Stromeria belongs to Aepyornithidae'
- 'Stromeria fajumensis belongs to Stromeria'
- 'Struthio belongs to Struthionidae'
- 'Struthio asiaticus belongs to Struthio'
- 'Struthio bradydactylus belongs to Struthio' according to Burchak-Abramovich 1939
- 'Struthio bradydactylus belongs to Struthio'
- 'Struthio orlovi belongs to Struthio' according to Kurochkin and Lungu 1970
- 'Struthio orlovi belongs to Struthio'
- 'Struthio wimani belongs to Struthio' according to Lowe 1931
- 'Struthio wimani belongs to Struthio'
- 'Struthiolithus chersonensis is recombined as Struthio chersonensis'