Opinions from R. Lydekker 1894
- 'Acrotherium is a subjective synonym of Nesodon'
- 'Acrotherium karaikense is a subjective synonym of Nesodon imbricatus'
- 'Acrotherium kobyi belongs to Acrotherium' according to Mercerat 1891
- 'Acrotherium kobyi is a subjective synonym of Nesodon ovinus'
- 'Acrotherium mutabile belongs to Acrotherium' according to Mercerat 1891
- 'Acrotherium mutabile is a subjective synonym of Nesodon ovinus'
- 'Acrotherium patagonicum is recombined as Nesodon patagonicus'
- 'Acrotherium patagonicum belongs to Acrotherium' according to Mercerat 1891
- 'Adelphotherium is a subjective synonym of Nesodon'
- 'Adelphotherium repandum belongs to Adelphotherium' according to Mercerat 1891
- 'Adelphotherium repandum is a subjective synonym of Nesodon imbricatus'
- 'Adelphotherium trivium belongs to Adelphotherium' according to Mercerat 1891
- 'Adelphotherium trivium is a subjective synonym of Nesodon imbricatus'
- 'Adinotherium magister is a subjective synonym of Nesodon ovinus'
- 'Adinotherium splendidum is a subjective synonym of Nesodon ovinus'
- 'Anchitherium australe belongs to Anchitherium' according to Burmeister 1878
- 'Anchitherium australe is recombined as Proterotherium australe'
- 'Anoplotherium americanum belongs to Anoplotherium' according to Bravard 1858
- 'Anoplotherium americanum is recombined as Proterotherium americanum'
- 'Astrapotheriidae belongs to Astrapotheria'
- 'Astrapotherium belongs to Astrapotheriidae'
- 'Astrapotherium angustidens belongs to Astrapotherium' according to Mercerat 1891
- 'Astrapotherium angustidens belongs to Astrapotherium'
- 'Astrapotherium burmeisteri belongs to Astrapotherium' according to Mercerat 1891
- 'Astrapotherium burmeisteri is a subjective synonym of Astrapotherium magnum'
- 'Astrapotherium gaudryi belongs to Astrapotherium' according to Mercerat 1891
- 'Astrapotherium gaudryi is a subjective synonym of Astrapotherium magnum'
- 'Astrapotherium patagonicum belongs to Astrapotherium' according to Burmeister 1879
- 'Astrapotherium patagonicum is a subjective synonym of Astrapotherium magnum'
- 'Astrapotherium robustum belongs to Astrapotherium' according to Mercerat 1891
- 'Astrapotherium robustum is a subjective synonym of Astrapotherium magnum'
- 'Astrapotherium voghti is a subjective synonym of Astrapotherium magnum'
- 'Cariacus belongs to Cervidae'
- 'Cervus aspeitianus is recombined as Cariacus aspeitianus'
- 'Cervus aspeitianus belongs to Cervus' according to F. Ameghino 1888
- 'Cervus brachycerus belongs to Cervus' according to Gervais and F. Ameghino 1880
- 'Cervus brachycerus is recombined as Cariacus brachyceros'
- 'Cervus campestris belongs to Cervus' according to Cuvier 1817
- 'Cervus campestris is recombined as Cariacus campestris'
- 'Cervus fragilis belongs to Cervus' according to F. Ameghino 1888
- 'Cervus fragilis is recombined as Cariacus fragilis'
- 'Cervus paludosus belongs to Cervus' according to Desmarest 1822
- 'Cervus paludosus is recombined as Cariacus paludosus'
- 'Cervus seleniticus belongs to Cervus' according to F. Ameghino 1888
- 'Cervus seleniticus is recombined as Cariacus seneliticus'
- 'Cervus ultra belongs to Cervus' according to F. Ameghino 1888
- 'Cervus ultra is recombined as Cariacus ultra'
- 'Diadiaphorus belongs to Proterotheriidae'
- 'Diadiaphorus majusculus belongs to Diadiaphorus'
- 'Diadiaphorus sanctaecrucis belongs to Diadiaphorus'
- 'Diadiaphorus velox belongs to Diadiaphorus'
- 'Entelomorphus is a subjective synonym of Typotherium'
- 'Epitherium belongs to Proterotheriidae'
- 'Equus curvidens belongs to Equus' according to Owen 1845
- 'Equus curvidens belongs to Equus'
- 'Equus neogaeus is recombined as Hippidium neogaeum'
- 'Equus principalis belongs to Equus' according to Lund 1846
- 'Equus principalis is recombined as Hippidium principale'
- 'Equus rectidens belongs to Equus' according to Gervais and F. Ameghino 1880
- 'Equus rectidens is a subjective synonym of Equus curvidens'
- 'Haplodontherium limum is a subjective synonym of Toxodontherium compressum'
- 'Haplodontherium wildei is a subjective synonym of Toxodontherium compressum'
- 'Hegetotherium belongs to Pachyrucidae'
- 'Hegetotherium strigatum belongs to Hegetotherium'
- 'Hipphaplus is a subjective synonym of Hippidium'
- 'Hipphaplus bravardi belongs to Hipphaplus' according to F. Ameghino 1889
- 'Hipphaplus bravardi is a subjective synonym of Hippidium neogaeum'
- 'Hipphaplus entrerianus belongs to Hipphaplus' according to F. Ameghino 1886
- 'Hipphaplus entrerianus is recombined as Hippidium entrerianum'
- 'Hippidion is corrected as Hippidium and belongs to Equidae'
- 'Hippidion angulatus is a subjective synonym of Hippidium principale'
- 'Hippidion compressidens belongs to Hippidion' according to F. Ameghino 1889
- 'Hippidion compressidens is a subjective synonym of Hippidium principale'
- 'Homalodontotheridae belongs to Astrapotheria'
- 'Homalodontotherium belongs to Homalodontotheridae'
- 'Homalodontotherium cumninghami belongs to Homalodontotherium'
- 'Macrauchenia belongs to Macraucheniidae'
- 'Macrauchenia boliviensis belongs to Macrauchenia' according to Huxley 1860
- 'Macrauchenia boliviensis belongs to Macrauchenia'
- 'Macrauchenia patachonica is corrected as Macrauchenia patagonica and belongs to Macrauchenia'
- 'Macraucheniidae belongs to Litopterna'
- 'Mesorhinus is a subjective synonym of Oxyodontherium'
- 'Mesotherium cristatum is recombined as Typotherium cristatum'
- 'Nesodon belongs to Toxodontidae'
- 'Nesodon imbricatus belongs to Nesodon'
- 'Nesodon magnus is recombined as Astrapotherium magnum'
- 'Nesodon ovinus belongs to Nesodon'
- 'Nesodon sullivani is a subjective synonym of Nesodon imbricatus'
- 'Nesodon typicus belongs to Nesodon' according to Mercerat 1891
- 'Nesodon typicus is a subjective synonym of Nesodon ovinus'
- 'Onohippidium belongs to Equidae'
- 'Onohippidium munizi belongs to Onohippidium' according to Moreno 1891
- 'Onohippidium munizi belongs to Onohippidium'
- 'Oxyodontherium [misspelled as Oxyodontotherium] belongs to Macraucheniidae'
- 'Oxyodontotherium angustidens belongs to Oxyodontotherium'
- 'Pachyrucidae belongs to Toxodontia'
- 'Pachyrucos typicus belongs to Pachyrucos'
- 'Pachyrukhos is corrected as Pachyrucos and belongs to Pachyrucidae'
- 'Palaeotherium paranensis is recombined as Scalabrinia paranaensis'
- 'Palaeotherium paranensis belongs to Palaeotherium' according to Bravard 1858
- 'Proterotheriidae belongs to Litopterna'
- 'Proterotherium cavum belongs to Proterotherium'
- 'Protoxodon is a subjective synonym of Nesodon'
- 'Protoxodon evidens belongs to Protoxodon' according to Mercerat 1891
- 'Protoxodon evidens is a subjective synonym of Nesodon patagonicus'
- 'Protoxodon marmoratus is a subjective synonym of Nesodon imbricatus'
- 'Scalabrinitherium is corrected as Scalabrinia and belongs to Macraucheniidae'
- 'Stenotephanos belongs to Toxodontidae'
- 'Stenotephanos speciosus belongs to Stenotephanos'
- 'Theosodon fontanae is recombined as Oxyodontherium fontanae'
- 'Theosodon lydekkeri is recombined as Oxyodontherium lydekkeri'
- 'Toxodon belongs to Toxodontidae'
- 'Toxodon burmeisteri is a subjective synonym of Toxodon platensis'
- 'Toxodon ensenadensis is a subjective synonym of Toxodon platensis'
- 'Toxodon foricurvatus is recombined as Xotodon foricurvatus'
- 'Toxodon paradoxus is a subjective synonym of Toxodon platensis'
- 'Toxodon platensis belongs to Toxodon'
- 'Toxodontherium belongs to Toxodontidae'
- 'Toxodontherium compressum belongs to Toxodontherium'
- 'Toxodontherium minus belongs to Toxodontherium'
- 'Toxodontidae belongs to Toxodontia'
- 'Typotheriidae belongs to Toxodontia'
- 'Typotherium belongs to Typotheriidae'
- 'Xotodon belongs to Toxodontidae'
- 'Xotodon catamarcensis belongs to Xotodon'
- 'Xotodon prominens belongs to Xotodon' according to F. Ameghino 1889
- 'Xotodon prominens is a subjective synonym of Xotodon foricurvatus'