Alsatia Tattersall & Schwartz, 1983 † accepted as Europolemur Weigelt, 1933 † (source of synonymy)
Alsatia Tattersall & Schwartz, 1983 † accepted as Europolemur Weigelt, 1933 † (verified source for family)
Amblotherium Owen, 1871 † (verified source for family)
Apera Ameghino, 1886 † accepted as Eutemnodus Bravard, 1858 † (verified source for family)
Apera Ameghino, 1886 † accepted as Eutemnodus Bravard, 1858 † (extant flag source)
Apera Ameghino, 1886 † accepted as Eutemnodus Bravard, 1858 † (source of synonymy)
Archaeotherium Leidy, 1850 † (verified source for family)
Ceratodon Brisson, 1762 accepted as Monodon Linnaeus, 1758 (verified source for family)
Ceratodon Brisson, 1762 accepted as Monodon Linnaeus, 1758 (source of synonymy)
Cetotheriophanes Brandt, 1873 † (current name source)
Cetotheriophanes Brandt, 1873 † (verified source for family)
Cetotheriophanes Brandt, 1873 † (extant flag source)
Cetotherium Brandt, 1843 † (verified source for family)
Chaeropotamus Desmarest, 1822 † accepted as Choeropotamus Desmarest, 1822 † (verified source for family)
Chaeropotamus Desmarest, 1822 † accepted as Choeropotamus Desmarest, 1822 † (extant flag source)
Choeropotamus Kaup, 1844 † accepted as Choeropotamus Desmarest, 1822 † (verified source for family)
Choeropotamus Desmarest, 1822 † (verified source for family)
Chöropotamus Roger, 1896 † accepted as Choeropotamus Desmarest, 1822 † (extant flag source)
Cryptopterus Mein, 1970 † accepted as Miopetaurista Kretzoi, 1962 † (verified source for family)
Cryptopterus Mein, 1970 † accepted as Miopetaurista Kretzoi, 1962 † (habitat flag source)
Cryptopterus Mein, 1970 † accepted as Miopetaurista Kretzoi, 1962 † (source of synonymy)
Cynodon Aymard, 1848 † accepted as Amphicynodon Filhol, 1882 † (source of synonymy)
Dakotamys Tedrow & Korth, 1997 † accepted as Dakotallomys Tedrow & Korth, 1999 † (source of synonymy)
Dicardia Ameghino, 1891 † accepted as Eocardia Ameghino, 1887 † (source of synonymy)
Dicardia Ameghino, 1891 † accepted as Eocardia Ameghino, 1887 † (verified source for family)
Dimyloides Hurzeler, 1944 † (current name source)
Dimyloides Hürzeler, 1942 † accepted as Dimyloides Hurzeler, 1944 † (verified source for family)
Dimyloides Hurzeler, 1944 † (verified source for family)
Diploceras Peterson, 1914 † (additional source)
Diploceras Peterson, 1914 † (verified source for family)
Diploceras Peterson, 1914 † (source of synonymy)
Eleutherodon Kermack, Kermack, Lees & Mills, 1998 † (verified source for family)
Eleutherodon Kermack, Kermack, Lees & Mills, 1998 † (current name source)
Eocardia Ameghino, 1887 † (current name source)
Eocardia Ameghino, 1887 † (verified source for family)
Eohyus Marsh, 1894 † accepted as Phenacodus Cope, 1873 † (verified source for family)
Eohyus Marsh, 1894 † accepted as Phenacodus Cope, 1873 † (source of synonymy)
Eucetotherium Brandt, 1873 † accepted as Cetotherium Brandt, 1843 † (verified source for family)
Eurodon Estravis & Russell, 1992 † (current name source)
Europolemur Weigelt, 1933 † (verified source for family)
Gliravus Stehlin & Schaub, 1951 † (current name source)
Gliravus Stehlin & Schaub, 1951 † (verified source for family)
Hebetotherium Ameghino, 1898 † accepted as Megatherium Cuvier, 1796 † (verified source for family)
Hesperoceras Villalta & Crusafont Pairó, 1956 † (verified source for family)
Hesperoceras Villalta & Crusafont Pairó, 1956 † (current name source)
Humbertia de Beaumont, 1965 † accepted as Quercygale Kretzoi, 1945 † (source of synonymy)
Humbertia de Beaumont, 1965 † accepted as Quercygale Kretzoi, 1945 † (verified source for family)
Liops Gidley, 1906 † accepted as Bootherium Leidy, 1852 † (verified source for family)
Megatherium Cuvier, 1796 † (verified source for family)
Mesochoerus Shaw & Cooke, 1941 † accepted as Kolpochoerus van Hoepen, 1932 † (verified source for family)
Mesocnus Matthew, 1931 † (verified source for family)
Mesocnus Matthew, 1931 † (current name source)
Narwhalus Duméril, 1805 accepted as Monodon Linnaeus, 1758 (verified source for family)
Neoracanthus Ameghino, 1889 † accepted as Megatherium Cuvier, 1796 † (verified source for family)
Ocnobates Cope, 1890 † accepted as Megatherium Cuvier, 1796 † (verified source for family)
Opisthotomus Cope, 1875 † accepted as Phenacodus Cope, 1873 † (verified source for family)
Opisthotomus Cope, 1875 † accepted as Phenacodus Cope, 1873 † (source of synonymy)
Oracanthus Ameghino, 1885 † accepted as Megatherium Cuvier, 1796 † (verified source for family)
Palaeobalaena Moreno, 1892 † (verified source for family)
Paracynodon Schlosser, 1899 † accepted as Amphicynodon Filhol, 1882 † (source of synonymy)
Phenacodus Cope, 1873 † (verified source for family)
Phenacodus Cope, 1873 † (current name source)
Pleurostylodon Ameghino, 1897 † (current name source)
Pseudocordylodon Hurzeler, 1944 † accepted as Dimyloides Hurzeler, 1944 † (source of synonymy)
Pseudocordylodon Hürzeler, 1942 † accepted as Dimyloides Hurzeler, 1944 † (verified source for family)
Quercygale Kretzoi, 1945 † (verified source for family)
Stephanoceras Colbert, 1936 † accepted as Stephanocemas Colbert, 1936 † (verified source for family)
Stephanoceras Colbert, 1936 † accepted as Stephanocemas Colbert, 1936 † (extant flag source)
Stephanoceras Colbert, 1936 † accepted as Stephanocemas Colbert, 1936 † (additional source)
Tricardia Ameghino, 1891 † accepted as Eocardia Ameghino, 1887 † (verified source for family)
Tricardia Ameghino, 1891 † accepted as Eocardia Ameghino, 1887 † (source of synonymy)
Triglyphus Fraas, 1866 † accepted as Tritylodon Owen, 1884 † (verified source for family)
Trispondylus Cope, 1884 † accepted as Phenacodus Cope, 1873 † (verified source for family)
Trispondylus Cope, 1884 † accepted as Phenacodus Cope, 1873 † (source of synonymy)