Opinions from F. Ameghino 1901
- 'Acoelodidae belongs to Hyracoidea'
- 'Acoelodus belongs to Acoelodidae'
- 'Acoelodus connectus belongs to Acoelodus'
- 'Acoelodus debilitatus belongs to Acoelodus'
- 'Acoelodus microdon belongs to Acoelodus'
- 'Acoelodus oppositus belongs to Acoelodus'
- 'Acrostylops belongs to Notostylopidae'
- 'Acrostylops pungiunculus belongs to Acrostylops'
- 'Adpithecus belongs to Notopithecidae'
- 'Adpithecus amplidens belongs to Adpithecus'
- 'Adpithecus secans belongs to Adpithecus'
- 'Albertogaudrya belongs to Albertogaudryidae'
- 'Albertogaudrya unica belongs to Albertogaudrya'
- 'Amilnedwardsia belongs to Meniscotheriidae'
- 'Amilnedwardsia brevicula belongs to Amilnedwardsia'
- 'Anchistrum belongs to Acoelodidae'
- 'Anchistrum sulcosum belongs to Anchistrum'
- 'Ancylocoelus lentus belongs to Ancylocoelus'
- 'Ancylocoelus minor belongs to Ancylocoelus'
- 'Anisolambda belongs to Meniscotheriidae'
- 'Anisolambda fissidens belongs to Anisolambda'
- 'Anisolambda latidens belongs to Anisolambda'
- 'Anisolambda longidens belongs to Anisolambda'
- 'Antepithecus belongs to Notopithecidae'
- 'Archaeopithecus alternans belongs to Archaeopithecus'
- 'Archaeopithecus rigidus belongs to Archaeopithecus'
- 'Argyrohyrax acuticostatus belongs to Argyrohyrax'
- 'Argyrohyrax concentricus belongs to Argyrohyrax'
- 'Argyrohyrax nesodontoides belongs to Argyrohyrax'
- 'Asmithwoodwardia belongs to Phenacodontidae'
- 'Asmithwoodwardia subtrigona belongs to Asmithwoodwardia'
- 'Asmodeus armatus belongs to Asmodeus'
- 'Asmodeus circunflexus belongs to Asmodeus'
- 'Astraponotus belongs to Astrapotheriidae'
- 'Astraponotus assymmetrum belongs to Astraponotus'
- 'Caroloameghinia belongs to Caroloameghinidae'
- 'Caroloameghinia mater belongs to Caroloameghinia'
- 'Caroloameghinia tenue belongs to Caroloameghinia'
- 'Caroloameghinidae is corrected as Caroloameghiniidae and belongs to Protungulata'
- 'Carolodarwinia belongs to Leontiniidae'
- 'Carolodarwinia pyramidentata belongs to Carolodarwinia'
- 'Carolozittelia belongs to Carolozittelidae'
- 'Carolozittelia eluta belongs to Carolozittelia'
- 'Carolozittelia tapiroides belongs to Carolozittelia'
- 'Carolozittelidae belongs to Pyrotheria'
- 'Catastylops belongs to Notostylopidae'
- 'Catastylops pendens belongs to Catastylops'
- 'Coelostylops belongs to Notostylopidae'
- 'Coelostylops crassus belongs to Coelostylops'
- 'Coresodon cancellatus belongs to Coresodon'
- 'Decaconus belongs to Phenacodontidae'
- 'Decaconus intricatus belongs to Decaconus'
- 'Dialophus belongs to Isotemnidae'
- 'Dialophus simus belongs to Dialophus'
- 'Didolodus crassicuspis belongs to Didolodus'
- 'Edvardocopeia belongs to Trigonostylopidae'
- 'Edvardocopeia sinuosa belongs to Edvardocopeia'
- 'Edvardotrouessartia belongs to Albertogaudryidae'
- 'Edvardotrouessartia sola belongs to Edvardotrouessartia'
- 'Enneoconus belongs to Phenacodontidae'
- 'Enneoconus parvidens belongs to Enneoconus'
- 'Entelostylops belongs to Pantostylopidae'
- 'Entelostylops cestillus belongs to Entelostylops'
- 'Entelostylops completus belongs to Entelostylops'
- 'Entelostylops incolumis belongs to Entelostylops'
- 'Entelostylops tripartitus belongs to Entelostylops'
- 'Eochalicotherium belongs to Isotemnidae'
- 'Eochalicotherium crassidens belongs to Eochalicotherium'
- 'Eochalicotherium cretaceum belongs to Eochalicotherium'
- 'Eochalicotherium minutum belongs to Eochalicotherium'
- 'Eochalicotherium robustum belongs to Eochalicotherium'
- 'Eohegetotherium belongs to Hegetotheridae'
- 'Eohegetotherium priscum belongs to Eohegetotherium'
- 'Eohyrax belongs to Archaeohyracidae'
- 'Eohyrax rusticus belongs to Eohyrax'
- 'Eohyrax strangulatus belongs to Eohyrax'
- 'Eomorphippus belongs to Notohippidae'
- 'Eomorphippus obscurus belongs to Eomorphippus'
- 'Eopachyrucos belongs to Hegetotheridae'
- 'Eopachyrucos pliciferus belongs to Eopachyrucos'
- 'Eostylops belongs to Pantostylopidae'
- 'Eostylops diversidens belongs to Eostylops'
- 'Eostylops obliquatus belongs to Eostylops'
- 'Ernestohaeckelia belongs to Meniscotheriidae'
- 'Ernestohaeckelia aculeata belongs to Ernestohaeckelia'
- 'Ernestohaeckelia acutidens belongs to Ernestohaeckelia'
- 'Ernestokokenia belongs to Phenacodontidae'
- 'Ernestokokenia marginata belongs to Ernestokokenia'
- 'Ernestokokenia nitida belongs to Ernestokokenia'
- 'Euprotogonia patagonica belongs to Euprotogonia'
- 'Euprotogonia trigonalis belongs to Euprotogonia'
- 'Guilielmofloweria belongs to Pantolambdidae'
- 'Guilielmofloweria plicata belongs to Guilielmofloweria'
- 'Guilielmoscottia belongs to Archaeopithecidae'
- 'Guilielmoscottia plicifera belongs to Guilielmoscottia'
- 'Hedralophus belongs to Leontiniidae'
- 'Hedralophus bicostatus belongs to Hedralophus'
- 'Henricofilholia belongs to Astrapotheriidae'
- 'Henricofilholia circumdata belongs to Henricofilholia'
- 'Henricofilholia inaequilatera belongs to Henricofilholia'
- 'Henricofilholia lustrata belongs to Henricofilholia'
- 'Henricosbornia belongs to Henricosbornidae'
- 'Henricosbornia lophodonta belongs to Henricosbornia'
- 'Henricosbornidae belongs to Prosimiae'
- 'Homalostylops belongs to Notostylopidae'
- 'Homalostylops interlissus belongs to Homalostylops'
- 'Homalostylops rigeo belongs to Homalostylops'
- 'Infrapithecus belongs to Notopithecidae'
- 'Infrapithecus cinctus belongs to Infrapithecus'
- 'Isotemnus apicatus belongs to Isotemnus'
- 'Isotemnus consumatus belongs to Isotemnus'
- 'Isotemnus cuspidatus belongs to Isotemnus'
- 'Isotemnus distentus belongs to Isotemnus'
- 'Isotemnus emundatus belongs to Isotemnus'
- 'Isotemnus enecatus belongs to Isotemnus'
- 'Isotemnus lophiodontoides belongs to Isotemnus'
- 'Josepholeidya belongs to Meniscotheriidae'
- 'Josepholeidya adunca belongs to Josepholeidya'
- 'Josepholeidya deculca belongs to Josepholeidya'
- 'Lambdaconus alius belongs to Lambdaconus'
- 'Lambdaconus mamma belongs to Lambdaconus'
- 'Lambdaconus porcus belongs to Lambdaconus'
- 'Lonchoconus belongs to Phenacodontidae'
- 'Lonchoconus lanceolatus belongs to Lonchoconus'
- 'Loxocoelus obturtus belongs to Loxocoelus'
- 'Maxschlosseria belongs to Isotemnidae'
- 'Maxschlosseria praeterita belongs to Maxschlosseria'
- 'Microstylops belongs to Pantostylopidae'
- 'Microstylops clarus belongs to Microstylops'
- 'Morphippus fraternus belongs to Morphippus'
- 'Morphippus quadrilobus belongs to Morphippus'
- 'Notohyrax belongs to Archaeohyracidae'
- 'Notohyrax conicus belongs to Notohyrax'
- 'Notostylops complexus belongs to Notostylops'
- 'Notostylops escaridus belongs to Notostylops'
- 'Notostylops irregularis belongs to Notostylops'
- 'Oldfieldthomasia belongs to Acoelodidae'
- 'Oldfieldthomasia anfractuosa belongs to Oldfieldthomasia'
- 'Oldfieldthomasia cingulata belongs to Oldfieldthomasia'
- 'Oldfieldthomasia conifera belongs to Oldfieldthomasia'
- 'Oldfieldthomasia cuneata belongs to Oldfieldthomasia'
- 'Oldfieldthomasia furcata belongs to Oldfieldthomasia'
- 'Oldfieldthomasia marginalis belongs to Oldfieldthomasia'
- 'Oldfieldthomasia parvidens belongs to Oldfieldthomasia'
- 'Oldfieldthomasia pulchella belongs to Oldfieldthomasia'
- 'Oldfieldthomasia septa belongs to Oldfieldthomasia'
- 'Oldfieldthomasia transversa belongs to Oldfieldthomasia'
- 'Othnielmarshia belongs to Henricosbornidae'
- 'Othnielmarshia lacunifera belongs to Othnielmarshia'
- 'Paginula belongs to Isotemnidae'
- 'Paginula parca belongs to Paginula'
- 'Pantostylopidae belongs to Tillodonta'
- 'Pantostylops belongs to Pantostylopidae'
- 'Pantostylops incompletus belongs to Pantostylops'
- 'Pantostylops minutus belongs to Pantostylops'
- 'Pantostylops typus belongs to Pantostylops'
- 'Parastrapotherium cingulatum is recombined as Henricofilholia cingulata'
- 'Parastrapotherium insuperabile belongs to Parastrapotherium'
- 'Parastrapotherium martiale belongs to Parastrapotherium'
- 'Parastrapotherium superabile belongs to Parastrapotherium'
- 'Parastrapotherium variabile belongs to Parastrapotherium'
- 'Paulogervaisia belongs to Carolozittelidae'
- 'Paulogervaisia celata belongs to Paulogervaisia'
- 'Paulogervaisia inusta belongs to Paulogervaisia'
- 'Pleurostylodon divisus belongs to Pleurostylodon'
- 'Pleurostylodon notabilis belongs to Pleurostylodon'
- 'Pleurostylodon plexus belongs to Pleurostylodon'
- 'Pleurostylodon similis belongs to Pleurostylodon'
- 'Pleurystylops belongs to Trigonostylopidae'
- 'Pleurystylops glebosus belongs to Pleurystylops'
- 'Pliostylops belongs to Notostylopidae'
- 'Pliostylops magnificus belongs to Pliostylops'
- 'Postpithecus belongs to Henricosbornidae'
- 'Postpithecus curvicrista belongs to Postpithecus'
- 'Postpithecus reflexus belongs to Postpithecus'
- 'Proadiantus gibbus belongs to Proadiantus'
- 'Proadiantus pungidens belongs to Proadiantus'
- 'Propachyrucos aequilatus belongs to Propachyrucos'
- 'Propyrotherium belongs to Pyrotheriidae'
- 'Propyrotherium saxeum belongs to Propyrotherium'
- 'Prosotherium quartum belongs to Prosotherium'
- 'Pseudadiantus belongs to Adiantidae'
- 'Pseudadiantus imperfectus belongs to Pseudadiantus'
- 'Pseudadiantus secans belongs to Pseudadiantus'
- 'Pseudhyrax belongs to Archaeohyracidae'
- 'Pseudhyrax eutrachytheroides belongs to Pseudhyrax'
- 'Pseudopachyrucos belongs to Hegetotheridae'
- 'Pseudopachyrucos foliiformis belongs to Pseudopachyrucos'
- 'Pseudostylops belongs to Trigonostylopidae'
- 'Pseudostylops subquadratus belongs to Pseudostylops'
- 'Pyrotherium pluteum belongs to Pyrotherium'
- 'Rhynchippus medianus belongs to Rhynchippus'
- 'Ricardolydekkeria belongs to Pantolambdidae'
- 'Ricardolydekkeria praerupta belongs to Ricardolydekkeria'
- 'Ricardolydekkeria profunda belongs to Ricardolydekkeria'
- 'Ricardowenia belongs to Carolozittelidae'
- 'Ricardowenia mysteriosa belongs to Ricardowenia'
- 'Rutimeyeria belongs to Meniscotheriidae'
- 'Rutimeyeria conulifera belongs to Rutimeyeria'
- 'Scabellia belongs to Albertogaudryidae'
- 'Scabellia laticincta belongs to Scabellia'
- 'Selenoconus belongs to Phenacodontidae'
- 'Selenoconus agilis belongs to Selenoconus'
- 'Selenoconus centralis belongs to Selenoconus'
- 'Selenoconus senex belongs to Selenoconus'
- 'Stenogenium aenigmaticum belongs to Stenogenium'
- 'Thomashuxleya belongs to Homalodontotheridae'
- 'Thomashuxleya artuata belongs to Thomashuxleya'
- 'Thomashuxleya externa belongs to Thomashuxleya'
- 'Thomashuxleya robusta belongs to Thomashuxleya'
- 'Thomashuxleya rostrata belongs to Thomashuxleya'
- 'Transpithecus belongs to Notopithecidae'
- 'Transpithecus obtentus belongs to Transpithecus'
- 'Trigonostylopidae belongs to Taligrada'
- 'Trigonostylops belongs to Trigonostylopidae'
- 'Trigonostylops duplex belongs to Trigonostylops'
- 'Trigonostylops eximius belongs to Trigonostylops'
- 'Trigonostylops hemicyclus belongs to Trigonostylops'
- 'Trigonostylops insumptus belongs to Trigonostylops'
- 'Trigonostylops integer belongs to Trigonostylops'
- 'Trigonostylops minimus belongs to Trigonostylops'
- 'Trigonostylops scabellum belongs to Trigonostylops'
- 'Trigonostylops secundarius belongs to Trigonostylops'
- 'Trigonostylops subtrigonus belongs to Trigonostylops'
- 'Trigonostylops trigonus belongs to Trigonostylops'
- 'Trimerostephanos coalitus belongs to Trimerostephanos'
- 'Trimerostephanos coarctatus belongs to Trimerostephanos'
- 'Trimerostephanos cuneolus belongs to Trimerostephanos'
- 'Trimerostephanos sigma belongs to Trimerostephanos'
- 'Trimerostephanos ultimus belongs to Trimerostephanos'
- 'Tychostylops belongs to Trigonostylopidae'
- 'Tychostylops marculus belongs to Tychostylops'
- 'Ultrapithecus belongs to Archaeopithecidae'
- 'Ultrapithecus rusticulus belongs to Ultrapithecus'
- 'Ultrapithecus rutilans belongs to Ultrapithecus'
- 'Victorlemoineia belongs to Meniscotheriidae'
- 'Victorlemoineia emarginata belongs to Victorlemoineia'
- 'Victorlemoineia labyrinthica belongs to Victorlemoineia'