Opinions from H. Gadow 1898
- 'Acanthodii was reranked as a unranked clade and belongs to Pisces'
- 'Acrania belongs to Vertebrata'
- 'Actinopterygii was reranked as a order and belongs to Teleostomi'
- 'Agamidae belongs to Lacertae'
- 'Aglossa belongs to Anura'
- 'Aglypha belongs to Colubridae'
- 'Aistopoda is corrected as Aistopodes and belongs to Lepospondyli'
- 'Allosaurus belongs to Theropoda'
- 'Allotheria belongs to Prototheria'
- 'Amblycephalidae belongs to Ophidia'
- 'Amblypoda was reranked as a suborder and belongs to Ungulata'
- 'Amphibia belongs to Gnathostomata'
- 'Amphignathodontidae belongs to Arcifera'
- 'Amphisbaenidae belongs to Lacertae'
- 'Amphitheriidae belongs to Trituberculata'
- 'Amphiumidae belongs to Urodela'
- 'Anchisaurus belongs to Theropoda'
- 'Ancylopoda was reranked as a suborder and belongs to Ungulata'
- 'Anelytropidae belongs to Lacertae'
- 'Anguidae belongs to Lacertae'
- 'Aniliidae is corrected as Aniellidae and belongs to Lacertae'
- 'Anomaluridae belongs to Sciuromorpha'
- 'Anomodontia belongs to Theromorpha'
- 'Anseriformes belongs to Carinatae'
- 'Antiarcha was reranked as a class and belongs to Hypostomata'
- 'Anuri is corrected as Anura and belongs to Lissamphibia'
- 'Apoda was reranked as a suborder and belongs to Lissamphibia'
- 'Archaeoceti belongs to Cetacea'
- 'Archaeopteryx belongs to Archaeornithes'
- 'Archaeornithes belongs to Aves'
- 'Arcifera was reranked as a unranked clade and belongs to Phaneroglossa'
- 'Arthrodira belongs to Dipnoi'
- 'Artiodactyla was reranked as a unranked clade and belongs to Ungulata'
- 'Athecae was reranked as a order and belongs to Chelonia'
- 'Atlantosaurus belongs to Sauropoda'
- 'Autosauri belongs to Sauria'
- 'Aves belongs to Gnathostomata'
- 'Boidae belongs to Ophidia'
- 'Bradypidae is corrected as Bradypodidae and belongs to Xenarthra'
- 'Branchiosauria is corrected as Branchiosauri and belongs to Lepospondyli'
- 'Brontosaurus belongs to Sauropoda'
- 'Brontozoum belongs to Theropoda'
- 'Bufonidae belongs to Arcifera'
- 'Camptosaurus belongs to Ornithopoda'
- 'Caprimulgi belongs to Coraciiformes'
- 'Carettochelyidae [misspelled as Carettochelydidae] belongs to Pleurodira'
- 'Carinatae belongs to Neornithes'
- 'Carnivora belongs to Eutheria'
- 'Castoridae belongs to Sciuromorpha'
- 'Caviidae belongs to Hystricomorpha'
- 'Ceratops belongs to Ceratopsia'
- 'Ceratopsia was reranked as a order and belongs to Dinosauria'
- 'Ceratosaurus belongs to Theropoda'
- 'Cetacea belongs to Eutheria'
- 'Chamaeleonidae is corrected as Chamaeleontidae and belongs to Chamaeleontes'
- 'Chamaeleontes belongs to Autosauri'
- 'Charadriiformes belongs to Carinatae'
- 'Chelonii was reranked as the subclass Chelonia and belongs to Reptilia'
- 'Cheloniidae [misspelled as Chelonidae] belongs to Cryptodira'
- 'Chelydidae belongs to Pleurodira'
- 'Chelydridae belongs to Cryptodira'
- 'Chinchillidae belongs to Hystricomorpha'
- 'Chiroptera belongs to Eutheria'
- 'Chondrostei was reranked as a suborder and belongs to Actinopterygii'
- 'Ciconiiformes belongs to Carinatae'
- 'Coelurus belongs to Theropoda'
- 'Colubridae belongs to Ophidia'
- 'Columbae belongs to Charadriiformes'
- 'Colymbiformes belongs to Carinatae'
- 'Compsognathus belongs to Theropoda'
- 'Condylarthra was reranked as a suborder and belongs to Ungulata'
- 'Coraciiformes belongs to Carinatae'
- 'Craniota belongs to Vertebrata'
- 'Creodonta belongs to Carnivora'
- 'Crocodilia was reranked as a subclass and belongs to Reptilia'
- 'Crossopterygidae was reranked as the order Crossopterygii and belongs to Teleostomi'
- 'Crotalinae belongs to Viperidae'
- 'Cryptodira belongs to Thecophora'
- 'Cuculi belongs to Cuculiformes'
- 'Cuculiformes belongs to Carinatae'
- 'Cyclostomata belongs to Craniota'
- 'Cystignathidae belongs to Arcifera'
- 'Dasipidae is corrected as Dasypodidae and belongs to Xenarthra'
- 'Dasyproctidae belongs to Hystricomorpha'
- 'Dasyuridae belongs to Polyprotodontia'
- 'Dendrobatidae belongs to Firmisternia'
- 'Dendrophryniscidae belongs to Arcifera'
- 'Dermatemydidae belongs to Cryptodira'
- 'Dibamidae belongs to Lacertae'
- 'Diclonius belongs to Ornithopoda'
- 'Didelphidae [misspelled as Didelphyidae] belongs to Polyprotodontia'
- 'Dinosauria was reranked as a subclass and belongs to Reptilia'
- 'Diplodocus belongs to Sauropoda'
- 'Dipnoi belongs to Ichthyes'
- 'Dipodidae belongs to Myomorpha'
- 'Diprotodontia belongs to Metatheria'
- 'Diprotodontidae belongs to Diprotodontia'
- 'Discoglossidae belongs to Arcifera'
- 'Dolichosauria was reranked as the order Dolichosauri and belongs to Pythonomorpha'
- 'Dyscophidae belongs to Firmisternia'
- 'Edentata belongs to Eutheria'
- 'Elasmobranchii was reranked as a unranked clade and belongs to Pisces'
- 'Engystomidae is corrected as Engystomatidae and belongs to Firmisternia'
- 'Eocardiidae is corrected as Eocardidae and belongs to Hystricomorpha'
- 'Epanorthidae belongs to Diprotodontia'
- 'Esthonychidae belongs to Tillodontia'
- 'Eublepharidae belongs to Geckones'
- 'Eusuchia was reranked as a order and belongs to Crocodilia'
- 'Eutheria belongs to Mammalia'
- 'Falconiformes belongs to Carinatae'
- 'Firmisternia was reranked as a unranked clade and belongs to Phaneroglossa'
- 'Fissipeda was reranked as the suborder Fissipedia and belongs to Carnivora'
- 'Galliformes belongs to Carinatae'
- 'Geckones belongs to Autosauri'
- 'Gekkonidae [misspelled as Geckonidae] belongs to Geckones'
- 'Geomyidae belongs to Myomorpha'
- 'Gerrhosauridae belongs to Lacertae'
- 'Glauconiidae belongs to Ophidia'
- 'Gnathostomata belongs to Craniota'
- 'Gruiformes belongs to Carinatae'
- 'Hadrosaurus belongs to Ornithopoda'
- 'Hallopus belongs to Theropoda'
- 'Helodermatidae belongs to Lacertae'
- 'Hemiphractinae was reranked as the family Hemiphractidae and belongs to Arcifera'
- 'Heterostraci was reranked as a class and belongs to Hypostomata'
- 'Holocephali was reranked as a unranked clade and belongs to Pisces'
- 'Holostei was reranked as a suborder and belongs to Actinopterygii'
- 'Hylidae belongs to Arcifera'
- 'Hyperoartia is a subjective synonym of Petromyzontes'
- 'Hyperotreti is a subjective synonym of Myxinoides'
- 'Hypostomata belongs to Craniota'
- 'Hypsilophodon [misspelled as Hypselophodon] belongs to Ornithopoda'
- 'Hyracoidea was reranked as a suborder and belongs to Ungulata'
- 'Hystricidae belongs to Hystricomorpha'
- 'Hystricomorpha was reranked as a unranked clade and belongs to Rodentia'
- 'Ichthyes belongs to Gnathostomata'
- 'Ichthyornithes belongs to Carinatae'
- 'Ichthyosauria was reranked as a subclass and belongs to Reptilia'
- 'Iguanidae belongs to Lacertae'
- 'Iguanodon belongs to Ornithopoda'
- 'Ilysiidae belongs to Ophidia'
- 'Insectivora belongs to Eutheria'
- 'Kinosternoidea [misspelled as Cinosternidae] belongs to Cryptodira'
- 'Lacertidae belongs to Lacertae'
- 'Lacertilia was reranked as the suborder Lacertae and belongs to Autosauri'
- 'Lagomorpha was reranked as a unranked clade and belongs to Rodentia'
- 'Laosaurus belongs to Ornithopoda'
- 'Lari belongs to Charadriiformes'
- 'Lemures was reranked as a suborder and belongs to Primates'
- 'Leporidae belongs to Lagomorpha'
- 'Lepospondyli was reranked as a order and belongs to Stegocephali'
- 'Limicolae belongs to Charadriiformes'
- 'Lissamphibia belongs to Amphibia'
- 'Litopterna was reranked as a suborder and belongs to Ungulata'
- 'Macropidae is corrected as Macropodidae and belongs to Diprotodontia'
- 'Mammalia belongs to Gnathostomata'
- 'Manidae belongs to Nomarthra'
- 'Marsipobranchii is a subjective synonym of Cyclostomata'
- 'Marsupialia is a subjective synonym of Metatheria'
- 'Megalosaurus belongs to Theropoda'
- 'Megatheriadae is corrected as Megatheriidae and belongs to Xenarthra'
- 'Mesosauria was reranked as the order Mesosauri and belongs to Plesiosauria'
- 'Metatheria belongs to Mammalia'
- 'Microsauria [misspelled as Microsauri] belongs to Lepospondyli'
- 'Monodelphia is a subjective synonym of Eutheria'
- 'Monorhina is a subjective synonym of Cyclostomata'
- 'Monotremata belongs to Prototheria'
- 'Morosaurus belongs to Sauropoda'
- 'Mosasauria is corrected as Mosasauri and belongs to Pythonomorpha'
- 'Muridae belongs to Myomorpha'
- 'Myomorpha was reranked as a unranked clade and belongs to Rodentia'
- 'Myoxidae belongs to Myomorpha'
- 'Myrmecobiidae belongs to Polyprotodontia'
- 'Myrmecophagidae belongs to Xenarthra'
- 'Mystacoceti belongs to Cetacea'
- 'Myxinoidea was reranked as the class Myxinoides and belongs to Cyclostomata'
- 'Neornithes belongs to Aves'
- 'Nomarthra belongs to Edentata'
- 'Nothosauria is corrected as Nothosauri and belongs to Plesiosauria'
- 'Notoryctidae belongs to Polyprotodontia'
- 'Octodontidae belongs to Hystricomorpha'
- 'Odontoceti belongs to Cetacea'
- 'Odontolcae was reranked as a unranked clade and belongs to Neornithes'
- 'Ophidia belongs to Sauria'
- 'Opisthoglypha belongs to Colubridae'
- 'Ornithomimus belongs to Ornithopoda'
- 'Ornithopoda belongs to Orthopoda'
- 'Ornithopsis belongs to Sauropoda'
- 'Orthopoda was reranked as a order and belongs to Dinosauria'
- 'Orycteropodidae belongs to Nomarthra'
- 'Osteostraci was reranked as a class and belongs to Hypostomata'
- 'Ostracodermi is a subjective synonym of Hypostomata'
- 'Parasuchia was reranked as a order and belongs to Crocodilia'
- 'Pareiasauria [misspelled as Pareiosauri] belongs to Theromorpha'
- 'Passeriformes belongs to Carinatae'
- 'Pelobatidae belongs to Arcifera'
- 'Pelomedusidae belongs to Pleurodira'
- 'Pelycosauria is a subjective synonym of Theriodontia'
- 'Peramelidae belongs to Polyprotodontia'
- 'Perissodactyla was reranked as a suborder and belongs to Ungulata'
- 'Petromyzontes belongs to Cyclostomata'
- 'Phalangistadae is corrected as Phalangistidae and belongs to Diprotodontia'
- 'Phaneroglossa belongs to Anura'
- 'Phascolomidae is corrected as Phascolomyidae and belongs to Diprotodontia'
- 'Phractamphibia belongs to Amphibia'
- 'Picae is corrected as Pici and belongs to Coraciiformes'
- 'Pinnipedia was reranked as a suborder and belongs to Carnivora'
- 'Pipidae belongs to Aglossa'
- 'Pisces was reranked as a subclass and belongs to Ichthyes'
- 'Placentalia is a subjective synonym of Eutheria'
- 'Placodontia belongs to Theromorpha'
- 'Plagiostomi was reranked as a order and belongs to Elasmobranchii'
- 'Platysternidae belongs to Cryptodira'
- 'Plesiosauria was reranked as a subclass and belongs to Reptilia'
- 'Pleurodira belongs to Thecophora'
- 'Polyprotodonta [misspelled as Polyprotodontia] belongs to Metatheria'
- 'Primates belongs to Eutheria'
- 'Proboscidea was reranked as a suborder and belongs to Ungulata'
- 'Procellariiformes belongs to Carinatae'
- 'Proreptilia was reranked as a subclass and belongs to Reptilia'
- 'Prosauria was reranked as a subclass and belongs to Reptilia'
- 'Proselachii belongs to Elasmobranchii'
- 'Proteidae belongs to Urodela'
- 'Proteroglypha was reranked as a unranked clade and belongs to Colubridae'
- 'Protodonta was reranked as a suborder and belongs to Polyprotodontia'
- 'Prototheria belongs to Mammalia'
- 'Protypotheriidae belongs to Typotheria'
- 'Pseudosuchia was reranked as a order and belongs to Crocodilia'
- 'Pteranodontes belongs to Pterosauria'
- 'Pterodactyli was reranked as a suborder and belongs to Pterosauria'
- 'Pterosauria was reranked as a subclass and belongs to Reptilia'
- 'Pygopodidae belongs to Lacertae'
- 'Pythonomorpha was reranked as a subclass and belongs to Reptilia'
- 'Raiae belongs to Plagiostomi'
- 'Ranidae belongs to Firmisternia'
- 'Ratitae was reranked as a unranked clade and belongs to Neornithes'
- 'Reptilia belongs to Gnathostomata'
- 'Rodentia was reranked as a suborder and belongs to Trogontia'
- 'Salamandridae belongs to Urodela'
- 'Sauria was reranked as a subclass and belongs to Reptilia'
- 'Sauropoda was reranked as a order and belongs to Dinosauria'
- 'Scelidosaurus belongs to Stegosauri'
- 'Scincidae belongs to Lacertae'
- 'Sciuridae belongs to Sciuromorpha'
- 'Sciuromorpha was reranked as a unranked clade and belongs to Rodentia'
- 'Selachii was reranked as a suborder and belongs to Plagiostomi'
- 'Sirenia was reranked as a order and belongs to Eutheria'
- 'Sirenidae belongs to Urodela'
- 'Sirenoidei belongs to Dipnoi'
- 'Spalacidae belongs to Myomorpha'
- 'Sphargididae is corrected as Sphargidae and belongs to Athecae'
- 'Sphenisciformes belongs to Carinatae'
- 'Stegocephali was reranked as a unranked clade and belongs to Phractamphibia'
- 'Stegosauria is corrected as Stegosauri and belongs to Orthopoda'
- 'Stegosaurus belongs to Stegosauri'
- 'Stereospondyli was reranked as a order and belongs to Stegocephali'
- 'Striges belongs to Coraciiformes'
- 'Struthiones belongs to Ratitae'
- 'Stylinodontidae belongs to Tillodontia'
- 'Tarsii was reranked as a suborder and belongs to Primates'
- 'Teiidae [misspelled as Tejidae] belongs to Lacertae'
- 'Teleostei was reranked as a suborder and belongs to Actinopterygii'
- 'Teleostomi was reranked as a unranked clade and belongs to Pisces'
- 'Temnospondyli was reranked as a order and belongs to Stegocephali'
- 'Testudinidae belongs to Cryptodira'
- 'Thecophora was reranked as a order and belongs to Chelonia'
- 'Theriodontia belongs to Theromorpha'
- 'Theromorpha was reranked as a subclass and belongs to Reptilia'
- 'Theropoda belongs to Dinosauria'
- 'Thylacoleonidae is corrected as Thylacoleontidae and belongs to Diprotodontia'
- 'Tillodontia was reranked as a suborder and belongs to Trogontia'
- 'Tillotheriidae belongs to Tillodontia'
- 'Tinamiformes belongs to Carinatae'
- 'Toxodontia belongs to Ungulata'
- 'Triceratops belongs to Ceratopsia'
- 'Triconodonta was reranked as a suborder and belongs to Polyprotodontia'
- 'Trionychoidea was reranked as a suborder and belongs to Thecophora'
- 'Trituberculata was reranked as a suborder and belongs to Polyprotodontia'
- 'Trogontia belongs to Eutheria'
- 'Typhlopidae belongs to Ophidia'
- 'Typotheria belongs to Trogontia'
- 'Typotheriidae belongs to Typotheria'
- 'Ungulata was reranked as a order and belongs to Eutheria'
- 'Urodeles was reranked as the order Urodela and belongs to Lissamphibia'
- 'Uropeltidae belongs to Ophidia'
- 'Uroplatidae belongs to Geckones'
- 'Varanidae belongs to Lacertae'
- 'Viperidae belongs to Ophidia'
- 'Viperinae belongs to Viperidae'
- 'Xantusiidae [misspelled as Xanthusiidae] belongs to Lacertae'
- 'Xenarthra belongs to Edentata'
- 'Xenopodinae was reranked as the family Xenopidae and belongs to Aglossa'
- 'Xenosauridae belongs to Lacertae'
- 'Zanclodon belongs to Theropoda'
- 'Zonuridae belongs to Lacertae'