Opinions from H.-P. Schultze 1993
- 'Ceratodontidae belongs to Ceratodontoidei'
- 'Ceratodontoidei belongs to Dipnoi'
- 'Ceratodus belongs to Ceratodontidae'
- 'Conchodus belongs to Dipteridae'
- 'Conchodus jerofejewi belongs to Conchodus' according to Pander 1858
- 'Conchopoma belongs to Conchopomatidae'
- 'Conchopoma edesi belongs to Conchopoma' according to Denison 1969
- 'Conchopomatidae belongs to Dipteroidei'
- 'Ctenodontiidae belongs to Ctenodontoidei'
- 'Ctenodontoidei belongs to Dipnoi'
- 'Ctenodus belongs to Ctenodontiidae'
- 'Ctenodus romeri belongs to Ctenodus' according to Thomson 1965
- 'Diabolepidida belongs to Dipnoiformes'
- 'Diabolepididae belongs to Diabolepidida'
- 'Diabolepis belongs to Diabolepididae'
- 'Diabolepis speratus belongs to Diabolepis' according to Chang and Yu 1984
- 'Dipnoi was reranked as a order and belongs to Dipnoiformes'
- 'Dipnoiformes belongs to Sarcopterygii'
- 'Dipnorhynchidae belongs to Dipnoi'
- 'Dipnorhynchus belongs to Dipnorhynchidae'
- 'Dipnorhynchus suessmilchi belongs to Dipnorhynchus' according to Etheridge 1906
- 'Dipteridae belongs to Dipteroidei'
- 'Dipteroidei belongs to Dipnoi'
- 'Dipterus belongs to Dipteridae'
- 'Epiceratodus belongs to Neoceratodontidae'
- 'Fleurantia belongs to Rhynchodipteridae'
- 'Fleurantia denticulata belongs to Fleurantia' according to Graham-Smith and Westoll 1937
- 'Ganopristodus belongs to Uronemidae'
- 'Ganopristodus lobatus belongs to Ganopristodus' according to Agassiz 1844
- 'Ganopristodus splendens belongs to Ganopristodus' according to Traquair 1881
- 'Gnathorhiza belongs to Gnathorhizidae'
- 'Gnathorhizidae belongs to Ctenodontoidei'
- 'Jarvikia belongs to Rhynchodipteridae'
- 'Jarvikia arctica belongs to Jarvikia' according to Lehman 1959
- 'Lepidosirenidae belongs to Ceratodontoidei'
- 'Neoceratodontidae belongs to Ceratodontoidei'
- 'Oervigia belongs to Phaneropleuridae'
- 'Oervigia nordica belongs to Oervigia' according to Lehman 1959
- 'Palaeophichthys belongs to Gnathorhizidae'
- 'Palaeophichthys parvulus belongs to Palaeophichthys' according to Eastman 1908
- 'Paraceratodus belongs to Ceratodontidae'
- 'Phaneropleurini is corrected as Phaneropleuridae and belongs to Dipteroidei'
- 'Phaneropleuron curtum is recombined as Scaumenacia curta' according to Bridge 1898
- 'Proceratodus belongs to Sagenodontidae'
- 'Proceratodus wagneri belongs to Proceratodus' according to Newberry 1889
- 'Protopterus belongs to Lepidosirenidae'
- 'Rhynchodipteridae belongs to Dipteroidei'
- 'Sagenodontidae belongs to Ctenodontoidei'
- 'Sagenodus belongs to Sagenodontidae'
- 'Scaumenacia belongs to Phaneropleuridae'
- 'Soederberghia belongs to Rhynchodipteridae'
- 'Soederberghia groenlandica belongs to Soederberghia' according to Lehman 1959
- 'Speonesydrion [misspelled as Speonysedrion] belongs to Dipnorhynchidae'
- 'Speonysedrion lehmanni belongs to Speonysedrion' according to Westoll 1949
- 'Uranolophidae belongs to Dipnoi'
- 'Uranolophus belongs to Uranolophidae'
- 'Uranolophus wyomingensis belongs to Uranolophus' according to Denison 1968
- 'Uronemidae belongs to Ctenodontoidei'