Opinions from F. Ameghino 1891
- 'Abderites belongs to Abderitesidae'
- 'Abderites tenuissimus belongs to Abderites'
- 'Abderitidae was reranked as the family Abderitesidae and belongs to Plagiaulacoidea'
- 'Acaremys belongs to Cercolabidae'
- 'Acaremys karaikensis belongs to Acaremys'
- 'Acaremys minutus is a subjective synonym of Stichomys gracilis'
- 'Acdestis belongs to Epanorthidae'
- 'Acdestis elatus belongs to Acdestis'
- 'Acdestis parvus belongs to Acdestis'
- 'Agustylus belongs to Creodonta'
- 'Agustylus cynoides belongs to Agustylus'
- 'Amnotherium belongs to Scelidotheridae'
- 'Amnotherium profundatum belongs to Amnotherium'
- 'Amphihapalops belongs to Megalonychidae'
- 'Amphihapalops cadens belongs to Amphihapalops'
- 'Amphihapalops congermanus belongs to Amphihapalops'
- 'Amphihapalops gallaicus belongs to Amphihapalops'
- 'Analcimorphus belongs to Megalonychidae'
- 'Analcimorphus inversus belongs to Analcimorphus'
- 'Analcitherium belongs to Scelidotheridae'
- 'Analcitherium antarticum belongs to Analcitherium'
- 'Anantiosodon belongs to Dasypoda'
- 'Anantiosodon rarus belongs to Anantiosodon'
- 'Anatherium belongs to Creodonta'
- 'Anatherium defossus belongs to Anatherium' according to Ameghino 1887
- 'Anatherium defossus belongs to Anatherium'
- 'Astrapodon belongs to Astrapotheridae'
- 'Astrapodon carinatus belongs to Astrapodon'
- 'Astrapotheriidae [misspelled as Astrapotheridae] belongs to Taligrada'
- 'Astrapotherium belongs to Astrapotheridae'
- 'Astrapotherium columnatum belongs to Astrapotherium'
- 'Astrapotherium delimitatum belongs to Astrapotherium'
- 'Astrapotherium giganteum belongs to Astrapotherium'
- 'Astrapotherium nanum belongs to Astrapotherium'
- 'Brachytherini belongs to Proterotheridae'
- 'Callomenus belongs to Epanorthidae'
- 'Callomenus intervalatus belongs to Callomenus'
- 'Cercolabidae belongs to Rodentia'
- 'Cochlops belongs to Propalaehoplophoridae'
- 'Cochlops debilis belongs to Cochlops'
- 'Cochlops muricatus belongs to Cochlops'
- 'Coelosoma belongs to Mesorhinidae'
- 'Conodonictis belongs to Creodonta'
- 'Conodonictis exterminator belongs to Conodonictis'
- 'Conodonictis saevus belongs to Conodonictis'
- 'Dasipidae is corrected as Dasypidae and belongs to Dasypoda'
- 'Dasypus minimus belongs to Dasypus' according to Desmarest 1860
- 'Dasypus minimus is recombined as Prozaedius minimus'
- 'Decastis belongs to Abderitesidae'
- 'Decastis columnaris belongs to Decastis'
- 'Decastis rurigerus belongs to Decastis'
- 'Diadiaphorus belongs to Brachytherini'
- 'Diadiaphorus diplinthius belongs to Diadiaphorus'
- 'Diadiaphorus majusculus [misspelled as Diadiaphorus mayusculus] belongs to Diadiaphorus'
- 'Dinamictis [misspelled as Dynamictis] belongs to Creodonta'
- 'Dinamictis fera belongs to Dinamictis' according to Ameghino 1891
- 'Dinamictis fera [misspelled as Dynamictis fera] belongs to Dynamictis'
- 'Diorotherium belongs to Homalodontotheridae'
- 'Diorotherium egregium belongs to Diorotherium'
- 'Echinomyidae belongs to Rodentia'
- 'Encinepeltus is corrected as Eucinepeltus and belongs to Propalaehoplophoridae'
- 'Encinepeltus petesatus belongs to Encinepeltus'
- 'Eocardia belongs to Eocardidae'
- 'Eocardia (Dicardia) belongs to Eocardia'
- 'Eocardia (Dicardia) excavata belongs to Eocardia (Dicardia)'
- 'Eocardia (Dicardia) modica belongs to Eocardia (Dicardia)'
- 'Eocardia (Procardia) belongs to Eocardia'
- 'Eocardia (Tricardia) belongs to Eocardia'
- 'Eocardia (Tricardia) crassidens belongs to Eocardia (Tricardia)'
- 'Eocardia (Tricardia) gracilis belongs to Eocardia (Tricardia)'
- 'Eocardia elliptica is recombined as Eocardia (Procardia) eliptica'
- 'Eocardiidae is corrected as Eocardidae and belongs to Rodentia'
- 'Eodidelphys belongs to Microbiotheridae'
- 'Eodidelphys famula belongs to Eodidelphys'
- 'Eodidelphys fortis belongs to Eodidelphys'
- 'Epanorthidae belongs to Plagiaulacoidea'
- 'Epanorthus belongs to Epanorthidae'
- 'Epanorthus ambiguus belongs to Epanorthus'
- 'Epanorthus inaequalis belongs to Epanorthus'
- 'Epanorthus lepidus belongs to Epanorthus'
- 'Eryomydae is corrected as Eryomyidae and belongs to Rodentia'
- 'Essoprion belongs to Epanorthidae'
- 'Essoprion consumptus belongs to Essoprion'
- 'Essoprion coruscus belongs to Essoprion'
- 'Eucholoeops belongs to Megalonychidae'
- 'Eucholoeops adteger [misspelled as Encholoeops adteger] belongs to Encholoeops' according to Amegino 1887
- 'Eucholoeops adteger is recombined as Hapalops adteger'
- 'Eucholoeops externus belongs to Eucholoeops'
- 'Eucholoeops fissognathus belongs to Eucholoeops'
- 'Eucholoeops fronto belongs to Eucholoeops'
- 'Eucholoeops latirostris belongs to Eucholoeops'
- 'Eucholoeops litoralis belongs to Eucholoeops'
- 'Euphractus exilis is recombined as Prozaedius exilis'
- 'Euphractus proximus is recombined as Prozaedius proximus'
- 'Eutatus oenophorum is recombined as Proeutatus oenophorum'
- 'Garzonia belongs to Garzonidae'
- 'Garzonia annectens belongs to Garzonia'
- 'Garzonia captiva belongs to Garzonia'
- 'Garzonia minima belongs to Garzonia'
- 'Garzonia typica belongs to Garzonia'
- 'Garzonidae belongs to Plagiaulacoidea'
- 'Geronops belongs to Megalonychidae'
- 'Geronops circularis belongs to Geronops'
- 'Graphimys belongs to Echinomyidae'
- 'Graphimys provectus belongs to Graphimys'
- 'Gyrignophus belongs to Echinomyidae'
- 'Gyrignophus complicatus belongs to Gyrignophus'
- 'Hadrorhynchus belongs to Microbiotheridae'
- 'Hadrorhynchus conspicuus belongs to Hadrorhynchus'
- 'Hadrorhynchus tortor belongs to Hadrorhynchus'
- 'Hadrorhynchus torvus belongs to Hadrorhynchus'
- 'Halmadromus belongs to Epanorthidae'
- 'Halmadromus vagus belongs to Halmadromus'
- 'Halmarhiphus belongs to Garzonidae'
- 'Halmarhiphus nanus belongs to Halmarhiphus'
- 'Halmaselus belongs to Epanorthidae'
- 'Halmaselus valens belongs to Halmaselus'
- 'Hapalops belongs to Ortotheridae'
- 'Hapalops angustipalatus belongs to Hapalops'
- 'Hapalops brevipalatus belongs to Hapalops'
- 'Hapalops cilindricus belongs to Hapalops'
- 'Hapalops crassidens belongs to Hapalops'
- 'Hapalops crassignathus belongs to Hapalops'
- 'Hapalops depressipalatus belongs to Hapalops'
- 'Hapalops diverssidens belongs to Hapalops'
- 'Hapalops elongatus belongs to Hapalops'
- 'Hapalops gracilidens belongs to Hapalops'
- 'Hapalops longipalatus belongs to Hapalops'
- 'Hapalops minutus belongs to Hapalops'
- 'Hapalops robustus belongs to Hapalops'
- 'Hapalops subcuadratus belongs to Hapalops'
- 'Hapalops testudinatus belongs to Hapalops'
- 'Hegetotherium belongs to Typotheridae'
- 'Hegetotherium costatum belongs to Hegetotherium'
- 'Hegetotherium cuneatum belongs to Hegetotherium'
- 'Homalodontotheridae belongs to Litopterna'
- 'Homalodontotherium belongs to Homalodontotheridae'
- 'Homalodontotherium segoviae belongs to Homalodontotherium'
- 'Homunculus belongs to Simioidea'
- 'Homunculus patagonicus belongs to Homunculus'
- 'Ictioborus belongs to Creodonta'
- 'Ictioborus fenestratus belongs to Ictioborus'
- 'Interatheridae [misspelled as Interatheridae] belongs to Toxodontia'
- 'Licaphrium belongs to Proterotherini'
- 'Licaphrium floweri belongs to Licaphrium'
- 'Licaphrium intermedium belongs to Licaphrium'
- 'Licaphrium parvulum belongs to Licaphrium'
- 'Lomomys belongs to Echinomyidae'
- 'Lomomys evexus belongs to Lomomys'
- 'Lymodon belongs to Scelidotheridae'
- 'Lymodon auca belongs to Lymodon'
- 'Lymodon perfectus belongs to Lymodon'
- 'Megalonychidae belongs to Gravigrada'
- 'Mesorhinidae belongs to Litopterna'
- 'Mesorhinus belongs to Mesorhinidae'
- 'Metopotherium belongs to Megalonychidae'
- 'Metopotherium splendens belongs to Metopotherium'
- 'Microbiotheridae belongs to Microbiotheria'
- 'Microbiotherium forticulum belongs to Microbiotherium'
- 'Microbiotherium tehuelchum belongs to Microbiotherium'
- 'Necrolestes belongs to Insectivora'
- 'Necrolestes patagonensis belongs to Necrolestes'
- 'Nematherium belongs to Scelidotheridae'
- 'Nematherium longirostris belongs to Nematherium'
- 'Neoreomys (Pseudoneoreomys) belongs to Neoreomys'
- 'Neoreomys (Pseudoneoreomys) leptorhynchus belongs to Neoreomys (Pseudoneoreomys)'
- 'Neoreomys (Pseudoneoreomys) mesorhynchus belongs to Neoreomys (Pseudoneoreomys)'
- 'Neoreomys (Pseudoneoreomys) pachyrhynchus belongs to Neoreomys (Pseudoneoreomys)'
- 'Ortotheridae belongs to Gravigrada'
- 'Oxyodontherium belongs to Mesorhinidae'
- 'Paraplanops belongs to Megalonychidae'
- 'Paraplanops oblongus belongs to Paraplanops'
- 'Parhapalops belongs to Ortotheridae'
- 'Parhapalops rectangulidens belongs to Parhapalops'
- 'Patriarchus belongs to Interatheridae'
- 'Patriarchus altus belongs to Patriarchus'
- 'Patriarchus diastematus belongs to Patriarchus'
- 'Patriarchus distortus belongs to Patriarchus'
- 'Patriarchus furculosus belongs to Patriarchus'
- 'Patriarchus leptocephalus belongs to Patriarchus'
- 'Patriarchus rectus belongs to Patriarchus'
- 'Pelecyodon belongs to Megalonychidae'
- 'Pelecyodon arcuatus belongs to Pelecyodon'
- 'Pelecyodon cristatus belongs to Pelecyodon'
- 'Pelecyodon maximus belongs to Pelecyodon'
- 'Pelecyodon petraeus belongs to Pelecyodon'
- 'Pelecyodon robustus belongs to Pelecyodon'
- 'Peltephilus belongs to Stegotheridae'
- 'Peltephilus ferox belongs to Peltephilus'
- 'Perathereutes belongs to Thylacynidae'
- 'Perathereutes amputans belongs to Perathereutes'
- 'Perathereutes obtusus belongs to Perathereutes'
- 'Perathereutes pungens belongs to Perathereutes'
- 'Perimys belongs to Eryomydae'
- 'Perimys angulatus belongs to Perimys'
- 'Perimys scalaris belongs to Perimys'
- 'Pichipilus belongs to Epanorthidae'
- 'Pichipilus exilis belongs to Pichipilus'
- 'Plagiaulacoidea belongs to Diprotodonta'
- 'Planops belongs to Megalonychidae'
- 'Planops longirostratus belongs to Planops'
- 'Planops obesus belongs to Planops'
- 'Prepotherium belongs to Scelidotheriidae'
- 'Prepotherium potens belongs to Prepotherium'
- 'Prodidelphys belongs to Microbiotheridae'
- 'Prodidelphys acicula belongs to Prodidelphys'
- 'Prodidelphys obtusa belongs to Prodidelphys'
- 'Prodidelphys pavita belongs to Prodidelphys'
- 'Proeutatus belongs to Dasypidae'
- 'Propalaehoplophoridae belongs to Glyptodontia'
- 'Propalaehoplophorus belongs to Propalaehoplophoridae'
- 'Propalaehoplophorus minus belongs to Propalaehoplophorus'
- 'Proterotheriidae is corrected as Proterotheridae and belongs to Litopterna'
- 'Proterotherini belongs to Proterotheridae'
- 'Proterotherium belongs to Proterotherini'
- 'Proterotherium cingulatum belongs to Proterotherium'
- 'Proterotherium curtidens belongs to Proterotherium'
- 'Prothylacynus belongs to Thylacynidae'
- 'Prothylacynus patagonicus belongs to Prothylacynus'
- 'Protoproviverra belongs to Thylacynidae'
- 'Protoproviverra ensidens belongs to Protoproviverra'
- 'Protoproviverra manzaniana belongs to Protoproviverra'
- 'Protoproviverra obtusa belongs to Protoproviverra'
- 'Protypotherium belongs to Interatheridae'
- 'Protypotherium compressidens belongs to Protypotherium'
- 'Protypotherium convexidens belongs to Protypotherium'
- 'Protypotherium diversidens belongs to Protypotherium'
- 'Protypotherium globosum belongs to Protypotherium'
- 'Prozaedius belongs to Dasypidae'
- 'Pseudhapalops belongs to Megalonychidae'
- 'Pseudhapalops forticulus belongs to Pseudhapalops'
- 'Pseudhapalops longitudinalis belongs to Pseudhapalops'
- 'Pseudhapalops observationis belongs to Pseudhapalops'
- 'Pseudocoelosoma belongs to Mesorhinidae'
- 'Pseudocoelosoma patagonica belongs to Pseudocoelosoma'
- 'Scelidotheriinae was reranked as the family Scelidotheridae and belongs to Gravigrada'
- 'Schistomys belongs to Eocardidae'
- 'Schistomys crassus belongs to Schistomys'
- 'Scleromys belongs to Echinomyidae'
- 'Scleromys angustus belongs to Scleromys'
- 'Sipalocyon belongs to Creodonta'
- 'Sipalocyon gracilis belongs to Sipalocyon'
- 'Sipalocyon pusillus belongs to Sipalocyon'
- 'Stegotheridae belongs to Peltateloidea'
- 'Stichomys belongs to Echinomyidae'
- 'Stichomys diminutus belongs to Stichomys'
- 'Stichomys gracilis belongs to Stichomys'
- 'Stichomys planus belongs to Stichomys'
- 'Stylognathus belongs to Microbiotheridae'
- 'Stylognathus diprotodontoides belongs to Stylognathus'
- 'Theosodon belongs to Mesorhinidae'
- 'Theosodon fontanae belongs to Theosodon'
- 'Theosodon gracilis belongs to Theosodon'
- 'Theosodon lydekkeri belongs to Theosodon'
- 'Theosodon patagonicum belongs to Theosodon'
- 'Thoatherium belongs to Brachytherini'
- 'Thoatherium crepidatum belongs to Thoatherium'
- 'Thoatherium minusculum belongs to Thoatherium'
- 'Thylacinidae [misspelled as Thylacynidae] belongs to Dasyura'
- 'Trematherium belongs to Megalonychidae'
- 'Trematherium nanum belongs to Trematherium'
- 'Typotheriidae [misspelled as Typotheridae] belongs to Toxodontia'
- 'Xyophorus belongs to Megalonychidae'
- 'Xyophorus andinus belongs to Xyophorus'
- 'Xyophorus atlanticus belongs to Xyophorus'
- 'Xyophorus sulcatus belongs to Xyophorus'