Opinions from A. L. Cione et al. 2000
- 'Achlysictis lelongi belongs to Achlysictis' according to Ameghino 1891
- 'Amphiocnus seneus belongs to Amphiocnus' according to Ameghino 1891
- 'Berroia belongs to Nesodontinae'
- 'Briaromys belongs to Dinomyidae'
- 'Cardiomys belongs to Caviidae'
- 'Carlesia belongs to Dinomyidae'
- 'Chrysophris is corrected as Chrysophrys and belongs to Sparidae'
- 'Coelosoma belongs to Proterotheriinae'
- 'Coelosoma eversa belongs to Coelosoma' according to Ameghino 1891
- 'Dasypus neogaeus belongs to Dasypus' according to Ameghino 1891
- 'Dinotoxodon paranensis belongs to Dinotoxodon' according to Burmeister 1885
- 'Doellomys belongs to Dinomyidae'
- 'Eleutherocercus paranensis belongs to Eleutherocercus' according to Burmeister 1891
- 'Eomegatherium nanum belongs to Eomegatherium' according to Burmeister 1891
- 'Eumegamysops belongs to Dinomyidae'
- 'Eumysops parodii belongs to Eumysops' according to Kraglievich 1945
- 'Eutomodus belongs to Toxodontinae'
- 'Haplodontherium limun belongs to Haplodontherium' according to F. Ameghino 1886
- 'Haplostropha belongs to Echymyidae'
- 'Licaphrium mesopotamiense belongs to Licaphrium' according to Bianchini and Bianchini 1971
- 'Lophogododon paranensis is recombined as Epitherium paranensis' according to Ameghino 1904
- 'Munizia belongs to Interatheriinae'
- 'Munizia paranensis belongs to Munizia' according to Kraglievich 1931
- 'Mylodon paranensis is recombined as Promylodon paranensis' according to Ameghino 1889
- 'Ortotherium brevirostrum belongs to Ortotherium' according to Bordas 1941
- 'Ortotherium robustum belongs to Ortotherium' according to Ameghino 1881
- 'Ortotherium schlosseri belongs to Ortotherium' according to Ameghino 1891
- 'Ortotherium scrofum belongs to Ortotherium' according to Bordas 1941
- 'Pachynodon belongs to Haplodontheriinae'
- 'Pachynodon modicus belongs to Pachynodon' according to Burmeister 1891
- 'Palaehoplophorus pressulus is recombined as Chlamyphractus pressulus' according to Castellanos 1939
- 'Palaeotoxodon paranensis belongs to Palaeotoxodon' according to Laurillard 1842
- 'Palaeotoxodon protoburmeisteri belongs to Palaeotoxodon' according to Ameghino 1887
- 'Palaeotoxodon protoburmeisteri is a nomen dubium'
- 'Palaeotoxodon virgatus belongs to Palaeotoxodon' according to Ameghino 1886
- 'Parahoplophorus paranensis belongs to Parahoplophorus' according to Ameghino 1883
- 'Paranamys belongs to Dinomyidae'
- 'Paranauchenia belongs to Macraucheniinae'
- 'Paranauchenia denticulata belongs to Paranauchenia' according to Ameghino 1891
- 'Pentastylodon belongs to Dinomyidae'
- 'Pentastylomys belongs to Dinomyidae'
- 'Plexochoerus belongs to Hydrochoeridae'
- 'Pliodolichotis belongs to Caviidae'
- 'Pliomegatherium belongs to Megatheriinae'
- 'Pliomegatherium lelongi belongs to Pliomegatherium'
- 'Pliomegatherium paranensis belongs to Pliomegatherium' according to Kraglievich 1930
- 'Pliomorphus ameghinoi belongs to Pliomorphus' according to Kraglievich 1923
- 'Pliomorphus brevis belongs to Pliomorphus' according to Kraglievich 1923
- 'Plohophorus paranensis belongs to Plohophorus' according to Ameghino 1891
- 'Pogonias belongs to Sciaenidae'
- 'Pogonias cromis belongs to Pogonias'
- 'Prolestodon belongs to Mylodontinae'
- 'Prolestodon antiquus belongs to Prolestodon' according to Ameghino 1885
- 'Prolestodon paranensis belongs to Prolestodon' according to Ameghino 1889
- 'Promegatherium parvulum belongs to Promegatherium' according to Ameghino 1891
- 'Promylodon belongs to Mylodontinae'
- 'Protautoga belongs to Labridae'
- 'Protautoga longidens belongs to Protautoga' according to Alessandri 1896
- 'Protomegamys belongs to Dinomyidae'
- 'Pseudosigmomys belongs to Dinomyidae'
- 'Ranculcus belongs to Mylodontinae'
- 'Ranculcus scalabrinianus belongs to Ranculcus' according to Ameghino 1891
- 'Scalabrinitherium belongs to Macraucheniinae'
- 'Sphenotherus paranensis belongs to Sphenotherus' according to Ameghino 1891
- 'Strabosodon acuticavus belongs to Strabosodon' according to Ameghino 1891
- 'Strabosodon obtusicavus belongs to Strabosodon' according to Ameghino 1891
- 'Stylocynus paranensis belongs to Stylocynus' according to Mercerat 1917
- 'Tetrastylomys belongs to Dinomyidae'
- 'Tomodus elautus is recombined as Eutomodus elautus'
- 'Trachycalyptus cingulatus belongs to Trachycalyptus' according to Ameghino 1889
- 'Urotherium interundatum belongs to Urotherium' according to Ameghino 1885
- 'Xotodon doellojuradoi belongs to Xotodon' according to Frenguelli 1920