Taxonomic names from M. C. McKenna and S. K. Bell 1997

  • Abderites, F. Ameghino 1887 [Abderitidae]
  • Acarechimys, Patterson 1965 [Rodentia]
  • Acaremys, Ameghino 1887 [Acaremyidae]
  • Acdestis, F. Ameghino 1887 [Palaeothentidae]
  • Achlysictis, F. Ameghino 1891 [Thylacosmilidae]
  • Acomys, I. Geoffroy 1838 [Muridae]
  • Acrobates, Desmarest 1818 [Acrobatidae]
  • Acrocyon, Ameghino 1887 [Borhyaenidae]
  • Actenomys, Burmeister 1888 [Ctenomyidae]
  • Adaetontherium, Lewis 1934 [Suidae]
  • Adapis, Cuvier 1822 [Adapidae]
  • Adelomyarion, M. Hugueney 1969 [Cricetidae]
  • Adelphomys, Ameghino 1887 [Rodentia]
  • Aepyprymnus, Garrod 1875 [Potoroinae]
  • Aethomys, Thomas 1915 [Muridae]
  • Africanomys, R. Lavocat 1961 [Ctenodactylidae]
  • Afrocricetodontinae, subfamily, Lavocat 1973 [Muridae]
  • Afromeryx, Pickford 1991 [Anthracotheriidae]
  • Agerinia, M. Crusafont-Pairó and Golpe-Posse 1973 [Notharctidae]
  • Agispelagus, Argyropulo 1939 [Leporidae]
  • Akodon, Meyen 1833 [Cricetidae]
  • Alactaga, F. Cuvier 1838 [Dipodidae]
  • Alienetherium, Lange-Badre 1981 [Hyaenodonta]
  • Allocavia, Pascual 1962 [Caviidae]
  • Allocricetus, S. Schaub 1930 [Cricetidae]
  • Allomyidae, family, O. C. Marsh 1877 [Allomyidae]
  • Allopterodon, L. Ginsburg 1978 [Hyaenodonta]
  • Alticola, Blanford 1881 [Cricetidae]
  • Amebelodontina, subtribe, M. C. McKenna and S. K. Bell 1997 [Gomphotheriidae]
  • Amebelodontini, tribe, Barbour 1927 [Gomphotheriidae]
  • Ameniscomys, R. Dehm 1950 [Aplodontidae]
  • Amphidozotheriinae, subfamily, Sige 1976 [Nyctitheriidae]
  • Amphipithecus, Colbert 1937 [Amphipithecidae]
  • Amphitherium, de Blainville 1838 [Mammalia]
  • Anatherium, F. Ameghino 1887 [Sparassodonta]
  • Anchilophus, P. Gervais 1852 [Pachynolophidae]
  • Anchimysops, Kraglievich 1927 [Hydrochoeridae]
  • Anchomomys, Stehlin 1916 [Notharctidae]
  • Andrewsimys, R. Lavocat 1973 [Phiomyidae]
  • Angelocabrerus, G.G. Simpson 1970 [Borhyaenidae]
  • Ankotarinja, Archer 1976 [Dasyuromorphia]
  • Anomalomys, Gaillard 1900 [Anomalomyidae]
  • Anoplotheriinae, subfamily, Gray 1821 [Anoplotheriidae]
  • Antarctodolops, Woodburne and Zinsmeister 1984 [Polydolopidae]
  • Antechinomys, Krefft 1867 [Dasyuridae]
  • Antechinus, Macleay 1841 [Dasyuridae]
  • Anthracomys, Schaub 1938 [Muridae]
  • Apatotheria, suborder (W. B. Scott and G. L. Jepsen 1936) [Mammalia]
  • Apeomys, V. Fahlbusch 1968 [Eomyidae]
  • Apodemus, Kaup 1829 [Muridae]
  • Apternodontidae, family, Matthew 1910 [Apternodontidae]
  • Apterodon, Fischer 1880 [Hyaenodonta]
  • Aralomys, Argyropulo 1939 [Muridae]
  • Aratomys, Zazhigin 1977 [Cricetidae]
  • Archaeoindris, Standing 1908 [Palaeopropithecidae]
  • Archaeolemur, Filhol 1895 [Archaeolemuridae]
  • Archaeotrigon, G. G. Simpson 1927 [Paurodontidae]
  • Arctias, Rafinesque 1815 [Phocidae]
  • Arginbaatar, Trofimov 1980 [Arginbaataridae]
  • Arginbaataridae, family, G. Hahn and R. Hahn 1983 [Arginbaataridae]
  • Argyromys, Schaub 1958 [Cricetidae]
  • Armantomys, H. de Bruijn 1966 [Gliridae]
  • Armintomyidae, family, M. Dawson et al. 1990 [Armintomyidae]
  • Arvicanthis, Lesson 1842 [Muridae]
  • Arvicolini, tribe, Giebel 1855 [Cricetidae]
  • Asellia mariaetheresae, P. Mein 1958 [Hipposideridae]
  • Asioryctes, Z. Kielan-Jaworowska 1975 [Mammalia]
  • Astrapotheroidea, order (Ameghino 1894) [Astrapotheria]
  • Asymmetrura, Farina 1981 [Glyptodontidae]
  • Atlantoxerus, Major 1893 [Sciuridae]
  • Australopithecus, Dart 1925 [Hominidae]
  • Babyrousini, tribe, Gray 1868 [Suidae]
  • Baranomys, Kormos 1933 [Cricetidae]
  • Barberahyus, Golpe-Posse 1977 [Tayassuidae]
  • Barunlestes, Z. Kielan-Jaworowska 1975 [Zalambdalestidae]
  • Bathyergoides, Stromer 1923 [Bathyergidae]
  • Behemota, infraorder, M. C. McKenna and S. K. Bell 1997 [Mammalia]
  • Beleutinus, Bazhanov 1972 [Zhelestidae]
  • Bematherium, Tedford 1967 [Diprotodontidae]
  • Berruvius, D. E. Russell 1964 [Primates]
  • Bettongia, Gray 1837 [Potoroinae]
  • Boffiidae, family, Hahn and Hahn 1983 [Boffiidae]
  • Bonapartheriidae, family, Pascual 1980 [Bonapartheriidae]
  • Bonapartherium, Pascual 1980 [Bonapartheriidae]
  • Boreofiber, Radulesco and Samson 1972 [Castoridae]
  • Borhyaena (F. Ameghino 1887) [Borhyaenidae]
  • Borhyaenidium, Pascual and Bocchino 1963 [Sparassodonta]
  • Brachalletes, De Vis 1883 [Diprotodontidae]
  • Brachyrhizomys, Teilhard de Jardin 1942 [Spalacidae]
  • Bransatoglis, M. Hugueney 1967 [Gliridae]
  • Brasiliochoerus, Rusconi 1930 [Tayassuidae]
  • Bunobrachyodus, Deperet 1908 [Anthracotheriidae]
  • Bunomerycini, tribe, Gentry and Hooker 1988 [Homacodontidae]
  • Burramyidae, family, Broom 1898 [Burramyidae]
  • Burramys, Broom 1896 [Burramyidae]
  • Butlerigale, Kühne 1968 [Eupantotheria]
  • Caenolestes, Thomas 1895 [Caenolestidae]
  • Caenolestidae, family, Trouessart 1898 [Caenolestidae]
  • Caenolestinae, subfamily, Trouessart 1898 [Caenolestidae]
  • Caenopithecus, Rütimeyer 1862 [Primates]
  • Cainochoerus, Pickford 1988 [Suidae]
  • Cainotheriidae, family, E. D. Cope 1881 [Cainotheriidae]
  • Callorhynchus, Greve 1896 [Otariidae]
  • Callotaria, Palmer 1892 [Otariidae]
  • Calomyscus, Thomas 1905 [Calomyscidae]
  • Caloprymnus, Thomas 1888 [Potoroinae]
  • Caprolagus, Blyth 1845 [Leporidae]
  • Cardiatheriinae, subfamily, L. Kraglievich 1930 [Hydrochoeridae]
  • Cardiomyinae, subfamily, L. Kraglievich 1930 [Caviidae]
  • Caspiopusa, Dybowski 1929 [Phocidae]
  • Castellanosia, Kraglievich 1932 [Glyptodontidae]
  • Castillomys, Michaux 1969 [Muridae]
  • Catodontherium, C. Deperet 1908 [Anoplotheriidae]
  • Catodus, Deperet 1905 [Anoplotheriidae]
  • Caudaphorus, Farina 1981 [Glyptodontidae]
  • Cavia, Pallas 1766 [Caviidae]
  • Caviops, Ameghino 1908 [Caviidae]
  • Ceciliolemur, Weigelt 1933 [Primates]
  • Celebochoerus, Hooijer 1848 [Suidae]
  • Cercaertus, Burmeister 1837 [Phalangeridae]
  • Cercartetus, Gloger 1841 [Burramyidae]
  • Cercocebus, E. Geoffroy 1812 [Cercopithecidae]
  • Cercomys, F. Cuvier 1829 [Echimyidae]
  • Cercopithecoides, Mollett 1947 [Cercopithecidae]
  • Cervinae, subfamily, Goldfuss 1820 [Cervidae]
  • Cervini, tribe, Goldfuss 1820 [Cervidae]
  • Chaeromeryx, Lydekker 1885 [Anthracotheriidae]
  • Chaeropus, Ogilby 1838 [Chaeropodidae]
  • Chalicomys, Kaup 1832 [Castoridae]
  • Champsodelphidae, family, Scott 1873 [Champsodelphinidae]
  • Chapalmatherium, F. Ameghino 1908 [Hydrochoeridae]
  • Chapattimys, S. T. Hussain et al. 1978 [Chapattimyidae]
  • Chasichimys, Pascual 1967 [Rodentia]
  • Chasicomys, Pascual 1967 [Octodontidae]
  • Chasicostylus, Reig 1957 [Sparassodonta]
  • Chelonocephalus, Thorpe 1921 [Merycoidodontidae]
  • Chlamyphorini, tribe, Pocock 1924 [Dasypodidae]
  • Chlamyphractus, Castellanos 1939 [Glyptodontidae]
  • Cimolestidae, family, O. C. Marsh 1889 [Cimolestidae]
  • Cimolodontidae, family, O. C. Marsh 1889 [Cimolodontidae]
  • Cladosictis, Ameghino 1887 [Sparassodonta]
  • Cleuastochoerus, Pearson 1928 [Suidae]
  • Cocomys, M. Dawson et al. 1984 [Rodentia]
  • Colpostemma, Ameghino 1891 [Dinomyidae]
  • Columbomys, Thaler 1962 [Theridomyidae]
  • Comaphorus, Ameghino 1886 [Glyptodontidae]
  • Consobrinus, Lange-Badre 1979 [Hyaenodonta]
  • Coscinocercus, Cabrera 1939 [Glyptodontidae]
  • Cricetidae, family, Fischer von Waldheim 1817 [Cricetidae]
  • Cricetinus, Zdansky 1928 [Cricetidae]
  • Cricetulodon, Hartenberger 1965 [Cricetidae]
  • Cricetulus, Milne-Edwards 1867 [Cricetidae]
  • Crinotherium, Filhol 1882 [Cainotheriidae]
  • Croizetoceros, Heintz 1970 [Cervidae]
  • Cryptomys, Gray 1964 [Bathyergidae]
  • Ctemys [Ctenomyidae]
  • Ctenacodon, O. C. Marsh 1878 [Allodontidae]
  • Cuvieroniini, tribe, Cabrera 1929 [Gomphotheriidae]
  • Cynodon, Aymard 1848 [Ursidae]
  • Cynohyaenodon, H. Filhol 1873 [Hyaenodontidae]
  • Cystophoca, Schufeldt 1890 [Phocidae]
  • Dabbenea, Kraglievich 1926 [Neoepiblemidae]
  • Dacrytheriinae, subfamily (Deperet 1917) [Anoplotheriidae]
  • Dakkamys, J. J. Jaeger 1977 [Muridae]
  • Dankomys, Reig 1978 [Cricetidae]
  • Dasycercus, Peters 1875 [Dasyuridae]
  • Dasylurinja, M. C. McKenna and S. K. Bell 1997 [Dasyuromorphia]
  • Dasymys, Peters 1875 [Muridae]
  • Dasypodon, Castellanos 1925 [Dasypodidae]
  • Dasypotherium, Moreno 1889 [Dasypodidae]
  • Dasyuridae, family, Goldfuss 1820 [Dasyuridae]
  • Dasyuroidea, suborder, Goldfuss 1820 [Dasyuromorphia]
  • Dasyuroides, Spencer 1896 [Dasyuridae]
  • Dasyurus, E. Geoffroy 1796 [Dasyuridae]
  • Deilotherium, Filhol 1882 [Anoplotheriidae]
  • Dendrolagus, S. Müller 1840 [Macropodidae]
  • Dendromus, A. Smith 1829 [Nesomyidae]
  • Dendropithecus, P. Andrews and E. Simons 1977 [Dendropithecidae]
  • Dermoptera, order, Illinger 1811 [Dermoptera]
  • Desmodillus, Thomas and Schwann 1904 [Cricetidae]
  • Diamantomys, Stromer 1922 [Diamantomyidae]
  • Diaphoromys, Kraglievich 1931 [Dinomyidae]
  • Diaphyodectes, Russell 1964 [Pseudorhyncocyonidae]
  • Diatomys, C.-k. Li 1974 [Diatomyidae]
  • Dichobuninae, subfamily, Turner 1849 [Dichobunidae]
  • Dichobunini, tribe, Turner 1849 [Dichobunidae]
  • Dicotylidae, family, Gray 1868 [Tayassuidae]
  • Didelpha, order, Bonaparte 1838 [Mammalia]
  • Didelphoidea, superfamily, J. E. Gray 1821 [Didelphimorphia]
  • Dinomys, Peters 1873 [Dinomyidae]
  • Dinopithecus, Broom 1936 [Cercopithecidae]
  • Diplobune, Rutimeyer 1862 [Anoplotheriidae]
  • Diprotodon, R. Owen 1838 [Diprotodontidae]
  • Diprotodonta, suborder, Owen 1866 [Mammalia]
  • Diprotodontidae, family, Gill 1872 [Diprotodontidae]
  • Dissopsalis, Pilgrim 1910 [Hyaenodonta]
  • Dolicavia, F. Ameghino 1916 [Caviidae]
  • Dolichocebus, A. F. Bordas 1942 [Cebidae]
  • Dolichopithecus, Depéret 1889 [Cercopithecidae]
  • Dolichotis, Desmarest 1820 [Caviidae]
  • Doliochoerini, tribe, Simpson 1945 [Tayassuidae]
  • Dorcopsis, H. Schlegel and S. Müller 1845 [Macropodidae]
  • Dorcopsoides, Woodburne 1967 [Macropodidae]
  • Dryolestes, O. C. Marsh 1878 [Dryolestidae]
  • Dryomimus, Kretzoi 1959 [Gliridae]
  • Dryomys, Thomas 1906 [Gliridae]
  • Dryopithecus, Lartet 1856 [Hominidae]
  • Dubiomys, R. Lavocat 1961 [Ctenodactylidae]
  • Dulcidon, L. Van Valen 1965 [Dichobunidae]
  • Dusignathina, subtribe (M. C. McKenna and S. K. Bell 1997) [Odobenidae]
  • Echidnidae, family, Burnett 1830 [Echidnidae]
  • Echymipera, Lesson 1842 [Peramelia]
  • Ectropomys, A.A. Bosma and N. Schmidt-Kittler 1972 [Rodentia]
  • Ektopodon, Stirton et al. 1967 [Ektopodontidae]
  • Ektopodontidae, family, Stirton et al. 1967 [Ektopodontidae]
  • Elephantulus, Thomas and Schwann 1906 [Macroscelididae]
  • Elfomys, Hartenberger 1971 [Theridomyidae]
  • Eliomys, Wagner 1840 [Gliridae]
  • Ellobius, G. Fischer 1814 [Cricetidae]
  • Elmerimys, R. Lavocat 1973 [Myophiomyidae]
  • Eobrasilia, G.G. Simpson 1947 [Stagodontidae]
  • Eochiromys, P. Teilhard de Chardin 1927 [Apatemyidae]
  • Eogliravus, Hartenberger 1971 [Gliridae]
  • Eolagurus, Argyropulo 1946 [Cricetidae]
  • Eomuscardinus, Hartenberger 1966 [Gliridae]
  • Eomyops, B. Engesser 1979 [Eomyidae]
  • Eosclerophorus, Castellanos 1948 [Glyptodontidae]
  • Eothenomys, Miller 1896 [Cricetidae]
  • Eozapus, Preble 1899 [Zapodidae]
  • Eozygodontinae, subfamily, M. C. McKenna and S. K. Bell 1997 [Mammutidae]
  • Ephelcomenus, Hurzeler 1938 [Anoplotheriidae]
  • Epiphiomys, R. Lavocat 1973 [Thryonomyidae]
  • Erinaceinae, subfamily, Fischer de Waldheim 1817 [Erinaceidae]
  • Erinaceini, tribe, Fischer de Waldheim 1817 [Erinaceidae]
  • Ernanodonta, order, Ding 1987 [Mammalia]
  • Estellomys, Hartenberger 1971 [Theridomyidae]
  • Etayoa, C. Villarroel 1987 [Xenungulata]
  • Eucoelophorus, Ameghino 1909 [Octodontidae]
  • Eucosmodontidae, family, Jepsen 1940 [Eucosmodontidae]
  • Eucricetodon, Thaler 1966 [Cricetidae]
  • Eumegamyinae, subfamily, L. Kraglievich 1926 [Dinomyidae]
  • Eumysodon, Argyropulo 1939 [Muridae]
  • Euowenia, De Vis 1891 [Diprotodontidae]
  • Euphractinae, subfamily, H. Winge 1923 [Dasypodidae]
  • Euphractini, tribe, H. Winge 1923 [Dasypodidae]
  • Eurolistriodon, Pickford and Moya Sola 1995 [Suidae]
  • Europolemur, J. Weigelt 1933 [Notharctidae]
  • Euryzygoma, Longman 1921 [Diprotodontidae]
  • Eusigmomys, Ameghino 1905 [Dinomyidae]
  • Eygalayodon, Sudre and Marandat 1993 [Dichobunidae]
  • Fahlbuschia, P. Mein and M. Freudenthal 1971 [Cricetidae]
  • Forsythia, P. Mein 1970 [Sciuridae]
  • Gaudeamus, A.E. Wood 1968 [Gaudeamuridae]
  • Geolabididae, family, McKenna 1960 [Geolabididae]
  • Gerbillus, Desmarest 1804 [Muridae]
  • Gerbua, F. Cuvier 1825 [Muridae]
  • Germanomys, Heller 1936 [Cricetidae]
  • Getuloxerus, R Lavocat 1961 [Sciuridae]
  • Glaucodon, Stirton 1957 [Dasyuridae]
  • Gliravus, H. G. Stehlin and S. Schaub 1951 [Gliridae]
  • Glirulus, Thomas 1906 [Gliridae]
  • Glyptatelinae, subfamily, Castellanos 1932 [Glyptodontidae]
  • Glyptocoileus, Castellanos 1952 [Glyptodontidae]
  • Glyptodontidium, Cabrera 1944 [Glyptodontidium]
  • Glyptopedius, Castellanos 1953 [Glyptodontidae]
  • Glyptostracon, Castellanos 1953 [Glyptostracon]
  • Glyptotheriini, tribe, Castellanos 1953 [Glyptodontidae]
  • Gomphotheriini, tribe, Hay 1922 [Gomphotheriidae]
  • Gorgopithecus, Broom and Robinson 1949 [Cercopithecidae]
  • Grammomys, Thomas 1915 [Muridae]
  • Graomys, Thomas 1916 [Cricetidae]
  • Groeberia, Patterson 1952 [Mammalia]
  • Groeberiidae, family, Patterson 1952 [Groeberiidae]
  • Guimarota, G. Hahn 1969 [Eupantotheria]
  • Guimarotodon, G. Hahn 1969 [Paulchoffatiidae]
  • Gymnobelideus, McCoy 1867 [Petauridae]
  • Gypsonictopidae, family, L. Van Valen 1967 [Gypsonictopidae]
  • Gypsorhynchus, Broom 1930 [Bathyergidae]
  • Gyriabrus, Ameghino 1891 [Dinomyidae]
  • Hadronomas, Woodburne 1967 [Diprotodontia]
  • Hadropithecus, Lorenz von Libernau 1901 [Archaeolemuridae]
  • Halichoerus, Nilsson 1820 [Phocidae]
  • Haliphilus, J. E. Gray 1866 [Phocidae]
  • Hapalidae, family, Wagner 1840 [Hapalidae]
  • Haplodontidae, family, Alston 1876 [Haplodontidae]
  • Haramiya, G. G. Simpson 1947 [Mammalia]
  • Haramiyidae, family, G.G. Simpson 1940 [Haramiyidae]
  • Hemiechinus, Fitzinger 1866 [Erinaceidae]
  • Hemimastodontidae, family, M. C. McKenna and S. K. Bell 1997 [Hemimastodontidae]
  • Heosminthus verus, Wang 1985 [Dipodidae]
  • Heterocephalus, Rüppell 1842 [Bathyergidae]
  • Heterocricetodon, Schaub 1925 [Cricetidae]
  • Heteroglyptodon, Roselli 1976 [Glyptodontidae]
  • Heterohyus, Gervais 1848 [Apatemyidae]
  • Heterosminthus, Schaub 1930 [Dipodidae]
  • Heteroxerus, Stehlin and Schaub 1951 [Sciuridae]
  • Hippohyini, tribe, Thenius 1970 [Suidae]
  • Hiwegicyon, Butler 1984 [Macroscelididae]
  • Hoanghonius, O. Zdansky 1930 [Sivaladapidae]
  • Holochilus, Brandt 1835 [Cricetidae]
  • Holoclemensiidae, family, Aplin and Archer 1987 [Holoclemensiidae]
  • Hoplophractus, Cabrera 1939 [Glyptodontidae]
  • Hoplotherium, Meyer 1841 [Anoplotheriidae]
  • Huanghotherium, Tung et al. 1975 [unclassified genus]
  • Huerzeleris, F. S. Szalay 1974 [Notharctidae]
  • Hyaenodictis, Lemoine 1891 [Mesonychidae]
  • Hyaenodontipus [Hyaenodontidae]
  • Hyaenodontops, F. Ameghino 1908 [Thylacosmilidae]
  • Hydromys, E. Geoffroy 1804 [Muridae]
  • Hydrurga, Gistel 1848 [Phocidae]
  • Hyoenodictis, Lemoine 1880 [Mesonychidae]
  • Hyperdichobunini, tribe, Gentry and Hooker 1988 [Dichobunidae]
  • Hypotherium, Ginsburg et al. 1991 [Suidae]
  • Hypsiprymnodon, Ramsay 1876 [Diprotodontia]
  • Hyracodon, Filhol 1876 [Anoplotheriidae]
  • Hyracodon, Tomes 1863 [Caenolestidae]
  • Hyracodontherium, Filhol 1877 [Anoplotheriidae]
  • Hyrocodon, Filhol 1873 [Anoplotheriidae]
  • Hystricognatha, Woods 1976 [Rodentia]
  • Indraloris, G. E. Lewis 1933 [Sivaladapidae]
  • Irhoudia, J.J. Jaeger 1971 [Ctenodactylidae]
  • Ischnodon, Stirton 1955 [Peramelemorphia]
  • Ischymomys, Zazhigin 1971 [Cricetidae]
  • Ischyromyidae, family, Alston 1876 [Ischyromyidae]
  • Isodactylus, Dal Piaz 1927 [Anthracotheriidae]
  • Isolinia, Castellanos 1951 [Glyptodontidae]
  • Isomyopotamus, Rovereto 1914 [Myocastoridae]
  • Isoodon, Desmarest 1817 [Peramelidae]
  • Issiodoromys, Bravard 1852 [Theridomyidae]
  • Isthmomys, Hooper and Musser 1964 [Cricetidae]
  • Kanisamys, A.E. Wood 1937 [Cricetidae]
  • Karnimata, Jacobs 1978 [Muridae]
  • Keeuna, Archer 1976 [Dasyuromorphia]
  • Kenyamys, R. Lavocat 1973 [Kenyamyidae]
  • Keramidomys, Hartenberger 1966 [Eomyidae]
  • Kermackiidae, family, P.M. Butler 1978 [Kermackiidae]
  • Kiinkerishella, Gabunia and Biryukov 1978 [Pantolestidae]
  • Kislangia, Kretzoi 1954 [Cricetidae]
  • Kiyutherium, Francis and Mones 1965 [Hydrochoeridae]
  • Koalemus, De Vis 1889 [Diprotodontidae]
  • Kochictis, Kretzoi 1943 [Pantolestidae]
  • Kolopsis, Woodburne 1967 [Diprotodontidae]
  • Kolopsoides, Plane 1967 [Diprotodontidae]
  • Komba, G.G. Simpson 1967 [Galagidae]
  • Koobor, Archer 1976 [Phascolarctidae]
  • Kopidodon, Weitzel 1933 [Paroxyclaenidae]
  • Kowalskia, V. Fahlbusch 1969 [Cricetidae]
  • Kubanochoerinae, subfamily, Gabunia 1958 [Suidae]
  • Kuehneodon, G. Hahn 1969 [Multituberculata]
  • Lagomyidae, family, Lilljeborg 1866 [Lagomyidae]
  • Lagorchestes, Gould 1841 [Macropodidae]
  • Lagostominae, subfamily, Wiegmann 1832 [Chinchillidae]
  • Lagostomopsis, Kraglievich 1926 [Chinchillidae]
  • Lagostomus, Brookes 1828 [Chinchillidae]
  • Lagotherium, Pictet 1853 [Leporidae]
  • Lagurodon, Kretzoi 1956 [Cricetidae]
  • Landenodon, Quinet 1968 [Arctocyonidae]
  • Laolestes, G. G. Simpson 1927 [Dryolestidae]
  • Laredomyidae, family, J.A. Wilson and Westgate 1991 [Laredomyidae]
  • Lasiorhinus, Gray 1863 [Vombatidae]
  • Laugaritiomys, O. Fejfar 1961 [Cricetidae]
  • Leakeymys, R. Lavocat 1964 [Cricetidae]
  • Leggada, Gray 1837 [Muridae]
  • Leithia, Lydekker 1896 [Gliridae]
  • Lemniscomys, Trouessart 1881 [Muridae]
  • Lepitherium, G. Saint-Hillaire 1839 [Glyptodontidae]
  • Leptaucheniinae, subfamily, Schultz and Falkenbach 1940 [Merycoidodontidae]
  • Leptaucheniini, tribe, Schultz and Falkenbach 1968 [Merycoidodontidae]
  • Leptictidae, family, Gill 1872 [Leptictidae]
  • Leptolophus, J. A. Remy 1965 [Pachynolophidae]
  • Leptonychotes, Gill 1872 [Phocidae]
  • Leptotataromys, Bohlin 1946 [Ctenodactylidae]
  • Leukaristomys, O. Fejfar 1961 [Cricetidae]
  • Libypithecus, Stromer 1913 [Cercopithecidae]
  • Ligerimys, Schaub 1951 [Eomyidae]
  • Limnopithecus, Hopwood 1933 [Hominidae]
  • Liotomus, Cope 1884 [Cimolodontidae]
  • Litodontomys, Loomis 1914 [Cephalomyidae]
  • Litokoala, Stirton et al. 1967 [Phascolarctidae]
  • Lobodontina, subtribe (M. C. McKenna and S. K. Bell 1997) [Phocidae]
  • Lomaphorini, tribe, Hoffstetter 1958 [Glyptodontidae]
  • Lomaphorops, Castellanos 1932 [Glyptodontidae]
  • Lophiomyidae, family, Gill 1872 [Rodentia]
  • Lophocoerus, Pilgrim 1926 [Suidae]
  • Loxodontina, subtribe, Osborn 1918 [Elephantidae]
  • Luantus, Ameghino 1899 [Eocardiidae]
  • Macaca, Lacépède 1799 [Cercopithecidae]
  • Macropus, Shaw 1790 [Macropodidae]
  • Macroscelides, A. Smith [Macroscelididae]
  • Malacothrix, Wagner 1843 [Nesomyidae]
  • Marsupiata, order, Richardson 1837 [Mammalia]
  • Masillabune (H. Tobien 1980) [Choeropotamidae]
  • Masrasector, Simons and Gingerich 1974 [Hyaenodonta]
  • Mastacomys, Thomas 1882 [Muridae]
  • Mastomys, Thomas 1915 [Muridae]
  • Megacerini, tribe, Viret 1961 [Cervidae]
  • Megactenomys, Rusconi 1930 [Ctenomyidae]
  • Megaladapis, Forsyth Major 1894 [Megaladapidae]
  • Megapedetes, MacInnes 1957 [Pedetidae]
  • Megistotherium, Savage 1973 [Hyaenodonta]
  • Meldimys, Michaux 1968 [Ischyromyidae]
  • Melissiodon, Schaub 1920 [Cricetidae]
  • Meniscolophus, Stirton 1955 [Diprotodontidae]
  • Merycops, Pilgrim 1910 [Anthracotheriidae]
  • Mesenodon, Paula Couto 1982 [Toxodontidae]
  • Mesocricetus, Nehring 1898 [Cricetidae]
  • Mesopithecus, Wagner 1839 [Cercopithecidae]
  • Mesopropithecus, Standing 1905 [Palaeopropithecidae]
  • Mesotoxodon, Paula Couto 1982 [Haplodontheriidae]
  • Metadelphia, Archer 1984 [Mammalia]
  • Metapterodon, Stromer 1923 [Hyaenodonta]
  • Metasayimys, R. Lavocat 1961 [Ctenodactylidae]
  • Metasinopa, Osborn 1909 [Hyaenodonta]
  • Metoldobotes, Schlosser 1910 [Macroscelididae]
  • Micrabderites, G.G. Simpson 1932 [Abderitidae]
  • Microadapis, Szalay 1974 [Adapidae]
  • Microbiotheriidae, family (F. Ameghino 1887) [Microbiotheriidae]
  • Microbiotherium, F. Ameghino 1887 [Microbiotheriidae]
  • Microcavia, Gervais and F. Ameghino 1880 [Caviidae]
  • Microcricetus, V. Fahlbusch and Mayr 1975 [Cricetidae]
  • Micromomyidae, family, Szalay 1974 [Micromomyidae]
  • Micromys, Dehne 1841 [Muridae]
  • Microsuevosciurus, Hartenberger 1973 [Theridomyidae]
  • Microsyopidae, family, Osborn and Wortman 1892 [Microsyopidae]
  • Microtarsioides, Weigelt 1933 [Primates]
  • Minitoxodon, Paula Couto 1982 [Toxodontidae]
  • Mioeuoticus, Leakey 1962 [Lorisidae]
  • Mioglis [Gliridae]
  • Miopetaurista, Kretzoi 1962 [Sciuridae]
  • Miorhynchocyon, Butler 1984 [Macroscelididae]
  • Mixodectidae, family, E.D. Cope 1883 [Mixodectidae]
  • Molossops, Peters 1865 [Molossidae]
  • Multituberculata, order, E. D. Cope 1884 [Multituberculata]
  • Munizia, Kraglievich 1931 [Interatheriidae]
  • Muscardinus, Kaup 1829 [Gliridae]
  • Mylomygale, Broom 1948 [Macroscelididae]
  • Myocastor, Kerr 1782 [Echimyidae]
  • Myocastoridae, family (F. Ameghino 1902) [Myocastoridae]
  • Myocricetodon, R. Lavocat 1952 [Cricetidae]
  • Myocricetodontini, tribe (Lavocat 1961) [Muridae]
  • Myoglis, S. Baudelot 1966 [Gliridae]
  • Myohyrax, Andrews 1914 [Macroscelididae]
  • Myomimus, Ognev 1924 [Gliridae]
  • Myophiomys, R. Lavocat 1973 [Myophiomyidae]
  • Myospalax, Laxmann 1773 [Rodentia]
  • Myotomys, Thomas 1918 [Muridae]
  • Myrmecobiidae, family, Waterhouse 1841 [Myrmecobiidae]
  • Myrmecobius, Waterhouse 1836 [Myrmecobiidae]
  • Mystromys, Wagner 1841 [Nesomyidae]
  • Nambaroo, Flannery and Rich 1986 [Balbaridae]
  • Nannopithex, H. G. Stehlin 1916 [Omomyidae]
  • Necrolemur, Filhol 1873 [Omomyidae]
  • Necrolestidae, family, F. Ameghino 1894 [Necrolestidae]
  • Nelsonia, C. H. Merriam 1897 [Cricetidae]
  • Neoanchimys, Pascual and Bondesio 1961 [Hydrochoeridae]
  • Neocavia, Kraglievich 1932 [Caviidae]
  • Neocometes, S. Schaub and H. Zapfe 1953 [Rodentia]
  • Neohelos, Stirton 1967 [Diprotodontidae]
  • Neoreomys, Ameghino 1887 [Dasyproctidae]
  • Neosciuromys, Stromer 1922 [Thryonomyidae]
  • Neosteiromys, Rovereto 1914 [Erethizontidae]
  • Neothoracophorini, tribe, Castellanos 1951 [Glyptodontidae]
  • Neotoxodon, Paula Couto 1982 [Toxodontidae]
  • Nesokia, Alston 1876 [Muridae]
  • Neuryurini, tribe, hoffstetter 1958 [Glyptodontidae]
  • Ngapakaldia, Stirton 1967 [Palorchestidae]
  • Nguruwe, M. Pickford 1986 [Suidae]
  • Nievella, R. Daams 1976 [Gliridae]
  • Notocricetodon, R. Lavocat 1973 [Cricetodontidae]
  • Notocynus, Mercerat 1891 [Sparassodonta]
  • Notogale, Loomis 1914 [Sparassodonta]
  • Notoryctidae, family [Notoryctidae]
  • Notosmilus, Kraglievich 1960 [Thylacosmilidae]
  • Nototherium, R. Owen 1845 [Diprotodontidae]
  • Occitanomys, Michaux 1969 [Muridae]
  • Octodontobradys, Santos et al. 1993 [Orophodontidae]
  • Odobenina, subtribe, M. C. McKenna and S. K. Bell 1997 [Odobenidae]
  • Oligodyromys, Bahlo 1975 [Gliridae]
  • Oligopetes, K. Heissig 1979 [Aplodontidae]
  • Oltinomys, Stehlin and Schaub 1951 [Theridomyidae]
  • Onychogalea, Gray 1841 [Macropodidae]
  • Oplotherium, Laizer and Parieu 1838 [Anoplotheriidae]
  • Ordolagus, de Muizon 1977 [Leporidae]
  • Oreopithecus, Gervais 1872 [Hominidae]
  • Orientalomys, H. de Bruijn and A.J. van der Meulen 1975 [Muridae]
  • Oryctolagus, Lilljeborg 1874 [Leporidae]
  • Osphranter, Gould 1842 [Macropodidae]
  • Otomys, F. Cuvier 1824 [Murina]
  • Oxacroninae, subfamily, Hurzeler 1936 [Cainotheriidae]
  • Oxygomphius, Meyer 1846 [Mammalia]
  • Pachychoerops, Kretzoi 1941 [Anthracotheriidae]
  • Pachypus, D'Alton 1839 [Glyptodontidae]
  • Paenoxyaenoides, Lange-Badre 1979 [Hyaenodonta]
  • Pairomys, Thaler 1966 [Rodentia]
  • Palaeocricetus, Argyropulo 1938 [Cricetidae]
  • Palaeopetaurus, Broom 1896 [Phalangeridae]
  • Palaeopotorous, Flannery and Rich 1986 [Potoroinae]
  • Palaeopropithecus, Grandidier 1899 [Palaeopropithecidae]
  • Palaeosciurus, Pomel 1853 [Sciuridae]
  • Palaeothentes, F. Ameghino 1887 [Palaeothentidae]
  • Palaeothentoides, Stromer 1932 [Macroscelididae]
  • Palerinaceus, Crusafont and Villalta 1947 [Erinaceidae]
  • Palorchestidae, family, Tate 1948 [Palorchestidae]
  • Pantodonta, suborder (E.D. Cope 1873) [Mammalia]
  • Pantolestidae, family, E. D. Cope 1884 [Pantolestidae]
  • Papio, Erxleben 1777 [Cercopithecidae]
  • Parachleuastochoerus, Golpe-Posse 1972 [Suidae]
  • Paracitellus, Dehm 1950 [Aplodontidae]
  • Paracolobus, R.E.F. Leakey 1969 [Cercopithecidae]
  • Paracricetulus, C. Young 1927 [Cricetidae]
  • Paracryptomys, R. Lavocat 1973 [Bathyergidae]
  • Paracynodon, Schlosser 1899 [Ursidae]
  • Paracynohyaenodon, Martin 1906 [Hyaenodontidae]
  • Paradolichopithecus, Necrasov et al. 1961 [Cercopithecidae]
  • Paradoxodonides, Strand 1943 [Suidae]
  • Paraethomys, F. Petter 1968 [Muridae]
  • Paraeutatus, Scott 1903 [Dasypodidae]
  • Parahoplophorus, Castellanos 1932 [Glyptodontidae]
  • Paralactaga, Young 1927 [Dipodidae]
  • Paranomalurus, R. Lavocat 1973 [Anomaluridae]
  • Parapanochthus, Moreira 1971 [Glyptodontidae]
  • Parapapio, T.R. Jones 1937 [Cercopithecidae]
  • Parapedetes, Stromer 1926 [Pedetidae]
  • Parapelomys, Jacobs 1978 [Muridae]
  • Paraphenacodus, Gabunia 1971 [Dichobunidae]
  • Paraphiomys, C.W. Andrews 1914 [Thryonomyidae]
  • Parapithecus, Schlosser 1911 [Parapithecidae]
  • Parapodemus, Schaub 1938 [Muridae]
  • Parapterodon, Lange-Badre 1979 [Hyaenodonta]
  • Pararhizomys, Teilhard de Jardin and Young 1931 [Spalacidae]
  • Parasminthus, Bohlin 1946 [Dipodidae]
  • Paratarsomys [Cricetidae]
  • Paratricuspiodon, Russell 1964 [Hyopsodontidae]
  • Paratritemnodon, Ranga Rao 1973 [Hyaenodonta]
  • Paraulacodus, Hinton 1933 [Thryonomyidae]
  • Parendotherium, Crusafont-Pairó and Adrover 1966 [Eobaataridae]
  • Parodimys, L. Kraglievich 1932 [Caviidae]
  • Paromomyidae, family, G. G. Simpson 1940 [Paromomyidae]
  • Paroxyaena, Martin 1906 [Hyaenodonta]
  • Paroxyclaenus, Teilhard de Chardin 1922 [Paroxyclaenidae]
  • Pascualia, Ortega Hinojosa 1963 [Caviidae]
  • Pattersomys, Pascual 1967 [Rodentia]
  • Paulchoffatia, Kühne 1961 [Paulchoffatiidae]
  • Paulchoffatiidae, family, G. Hahn 1969 [Paulchoffatiidae]
  • Peiranoa, Castellanos 1946 [Glyptodontidae]
  • Pelomys, Peters 1852 [Muridae]
  • Pentaglis, Kretzoi 1943 [Gliridae]
  • Peradectia, order, Marshall et al. 1990 [Didelphimorphia]
  • Perameles, E. Geoffroy 1804 [Peramelidae]
  • Peramelidae, family, Gray 1825 [Peramelidae]
  • Perameloidea, suborder, M. C. McKenna and S. K. Bell 1997 [Peramelemorphia]
  • Periconodon, Stehlin 1916 [Notharctidae]
  • Peridyromys, Stehlin and Schaub 1951 [Gliridae]
  • Perikoala, Stirton 1957 [Phascolarctidae]
  • Perimys, F. Ameghino 1887 [Neoepiblemidae]
  • Peroryctes, Thomas 1906 [Peramelidae]
  • Petauridae, family, C. L. Bonaparte 1838 [Petauridae]
  • Petaurinae, subfamily, Gill 1872 [Mammalia]
  • Petaurista, Link 1795 [Sciuridae]
  • Petaurus, Shaw 1791 [Petauridae]
  • Petinomys, Thomas 1908 [Sciuridae]
  • Petrogale, Gray 1837 [Macropodidae]
  • Petrokozlovia, Shevyreva 1972 [Rodentia]
  • Petromus, A. Smith 1831 [Thryonomyidae]
  • Phacochoeridae, family, Gray 1868 [Suidae]
  • Phacochoerini, tribe, Gray 1868 [Suidae]
  • Phalanger, Storr 1780 [Phalangeridae]
  • Phalangeridae, family, Thomas 1888 [Phalangeridae]
  • Phalangeroidea, superfamily, Thomas 1888 [Diprotodontia]
  • Phanomys, Ameghino 1887 [Eocardiidae]
  • Phascogale, C. J. Temminck 1824 [Dasyuridae]
  • Phascolarctidae, family, R. Owen 1839 [Phascolarctidae]
  • Phascolarctoidea, superfamily, Owen 1839 [Diprotodontia]
  • Phascolarctos, de Blainville 1816 [Phascolarctidae]
  • Phascolonus, Owen 1872 [Vombatidae]
  • Phascolosorex, Marschie 1916 [Dasyuridae]
  • Phiocricetomys, A.E. Wood 1968 [Myophiomyidae]
  • Phiomyoides, Stromer 1926 [Myophiomyidae]
  • Phlyctaenopyga, Cabera 1944 [Glyptodontidae]
  • Pholidota, order, Weber 1904 [Pholidota]
  • Phthoramys, Ameghino 1887 [Octodontidae]
  • Phyllophaga, suborder, Owen 1842 [Mammalia]
  • Pichipilus, Ameghino 1890 [Pichipilidae]
  • Picopsidae, family, Fox 1980 [Picopsidae]
  • Picromomyidae, family, Rose and Bown 1996 [Picromomyidae]
  • Pithanotomys, Ameghino 1887 [Octodontidae]
  • Pitikantia, Stirton 1967 [Palorchestidae]
  • Plagiarthrus, F. Ameghino 1896 [Interatheriidae]
  • Plagiaulacidae, family, Gill 1872 [Plagiaulacidae]
  • Plagiaulax, Falconer 1857 [Plagiaulacidae]
  • Plagiomenidae, family, Matthew 1918 [Plagiomenidae]
  • Plaisiodon, Woodburne 1967 [Diprotodontidae]
  • Planigale, Trougthon 1928 [Dasyuridae]
  • Platychoerops, E. Charlesworth 1855 [Plesiadapidae]
  • Pleregnathus, Laizer and Parieu 1838 [Anoplotheriidae]
  • Plesidissacus, Lemoine 1894 [Mesonychidae]
  • Plesiocricetodon, Schaub 1934 [Cricetidae]
  • Plesiocyon, Schlosser 1887 [Canidae]
  • Plesiofelis, S. Roth 1903 [Borhyaenidae]
  • Pliolagus, Kormos 1934 [Leporidae]
  • Pliolestes, Reig 1955 [Caenolestidae]
  • Pliopentalagus, Gureev and Konkova 1964 [Leporidae]
  • Pliopetaurista, Kretzoi 1962 [Sciuridae]
  • Pliopetes, Kretzoi 1959 [Sciuridae]
  • Pliopithecus, Gervais 1849 [Pliopithecidae]
  • Plioprion, Cope 1884 [Plagiaulacidae]
  • Pliosciuropterus, A. Sulimski 1964 [Sciuridae]
  • Plioselevinia, A. Sulimski 1962 [Seleviniidae]
  • Pliospalax, Kormos 1932 [Spalacidae]
  • Plohophoroides, Castellanos 1928 [Glyptodontidae]
  • Polydolopoidea, superfamily, F. Ameghino 1897 [Mammalia]
  • Pomonomys, Stromer 1922 [Diamantomyidae]
  • Pondaungia, G. E. Pilgrim 1927 [Amphipithecidae]
  • Pongo, Lacépède 1799 [Hominidae]
  • Pontoleo, Gloger 1841 [Otariidae]
  • Pontotatus, Ameghino 1908 [Dasypodidae]
  • Potamochoerini, tribe, Gray 1873 [Suidae]
  • Potamotelsidae, family, Nessov 1987 [Potamotelsidae]
  • Potorous, Desmarest 1804 [Potoroinae]
  • Praearmantomys, H. de Bruijn 1966 [Gliridae]
  • Praecodens, Lange-Badre 1981 [Hyaenodonta]
  • Prepidolops, Pacual 1980 [Mammalia]
  • Presbytis, Eschscholtz 1821 [Cercopithecidae]
  • Priodontini, tribe, Gray 1873 [Dasypodidae]
  • Prionotemnus, Stirton 1955 [Macropodidae]
  • Proalactaga, Savinov 1970 [Dipodidae]
  • Procardiomys, Pascual 1961 [Caviidae]
  • Proceromys, Brandy 1979 [Muridae]
  • Proconsul, Hopwood 1933 [Proconsulidae]
  • Procynocephalus, Schlosser 1924 [Cercopithecidae]
  • Prodissopsalis, H. W. Matthes 1950 [Hyaenodontidae]
  • Prodolichotis, Kraglievich 1932 [Caviidae]
  • Proeuphractus scalabrinii, F. P. Moreno and A. Mercerat 1891 [Dasypodidae]
  • Progalago, MacInnes 1943 [Lorisidae]
  • Progonomys, Schaub 1938 [Muridae]
  • Proheliophobius, R. Lavocat 1973 [Bathyergidae]
  • Prolaena, Xu et al. 1979 [Hyaenodonta]
  • Prolagostomus, F. Ameghino 1887 [Chinchillidae]
  • Promops, Gervais 1855 [Molossidae]
  • Pronasilio, Butler 1984 [Macroscelididae]
  • Pronycticebus, G. Grandidier 1904 [Primates]
  • Propachynolophus, Lemoine 1891 [Palaeotheriidae]
  • Propalaeocastor, Borisoglebskaya 1967 [Castoridae]
  • Propanochthus, Castellanos 1925 [Glyptodontidae]
  • Propediolagus, Ortega Hinojosa 1963 [Caviidae]
  • Propleopus, Longman 1924 [Diprotodontia]
  • Propliomys, Kretzoi 1959 [Cricetidae]
  • Propliopithecus, M. Schlosser 1911 [Propliopithecidae]
  • Propterodon, Martin 1906 [Hyaenodontidae]
  • Prosiphneus, Teilhard de Jardin 1926 [Siphneidae]
  • Prospalax, Mehely 1908 [Cricetidae]
  • Protabrocoma, Kraglievich 1927 [Abrocomidae]
  • Protadelomys, Hartenberger 1968 [Pseudosciuridae]
  • Protalactaga, Young 1929 [Dipodidae]
  • Protanancina, subtribe, M. C. McKenna and S. K. Bell 1997 [Gomphotheriidae]
  • Protarsomys, Lavocat 1973 [Cricetidae]
  • Protatera, Jaeger 1977 [Cricetidae]
  • Protelidae, family, Flower 1869 [Hyaenidae]
  • Protemnodon, R. Owen 1874 [Macropodidae]
  • Proterotheriinae, subfamily, F. Ameghino 1885 [Proterotheriidae]
  • Protoadapis, Lemoine 1878 [Adapidae]
  • Protohydrochoerus, Rovereto 1914 [Hydrochoeridae]
  • Protoptychidae, family, Schlosser 1911 [Protoptychidae]
  • Prototomys, Broom 1948 [Cricetidae]
  • Protypotheroides, Stromer 1922 [Macroscelididae]
  • Psalodon, G. G. Simpson 1926 [Allodontidae]
  • Pseudhalmarhiphus, Ameghino 1903 [Caenolestidae]
  • Pseudocheirus, Ogilby 1837 [Pseudocheiridae]
  • Pseudochirops, Marschie 1915 [Pseudocheiridae]
  • Pseudocricetodon, Thaler 1969 [Cricetidae]
  • Pseudokoala, Turnbull and Lundelius 1970 [Petauridae]
  • Pseudoloris, H. G. Stehlin 1916 [Omomyidae]
  • Pseudolycopsis, Marschall 1976 [Borhyaenidae]
  • Pseudomeriones, Schaub 1934 [Muridae]
  • Pseudoneothoracophorus, Castellanos 1951 [Glyptodontidae]
  • Pseudoparamys, Michaux 1964 [Rodentia]
  • Pseudoplataeomys, Kraglievich 1934 [Octodontidae]
  • Pseudoplohophorus, Castellanos 1926 [Glyptodontidae]
  • Pseudorhynchocyon, Filhol 1895 [Leptictidae]
  • Pseudorhynchocyoninae, subfamily, Sige 1974 [Leptictidae]
  • Pseudorophodon, Hoffestter 1954 [Glyptodontidae]
  • Pseudosciurinae, subfamily, Lavocat 1951 [Theridomyidae]
  • Pseudosciurus, Hensel 1856 [Pseudosciuridae]
  • Pterospalax, Kretzoi 1970 [Cricetidae]
  • Ptilodontidae, family, E.D. Cope 1887 [Ptilodontidae]
  • Pugiodens, H. W. Matthes 1952 [Paroxyclaenidae]
  • Purperia, Paula Couto 1982 [Leontiniidae]
  • Pygathrix, E. Geoffroy 1812 [Cercopithecidae]
  • Pyramios, Woodburne 1967 [Diprotodontidae]
  • Qarunavus, Simons and P. Gingerich 1974 [Ptolemaiida]
  • Quercitherium, Filhol 1880 [Hyaenodontidae]
  • Quercymys, Thaler 1966 [Rodentia]
  • Ramsayia, Tate 1951 [Vombatidae]
  • Rattus, G. Fischer 1803 [Muridae]
  • Ratufa, Gray 1867 [Sciuridae]
  • Reithroparamyidae, family, A.E. Wood 1962 [Reithroparamyidae]
  • Remys, Thaler 1966 [Theridomyidae]
  • Rhabdomys, Thomas 1916 [Muridae]
  • Rhagapodemus, Kretzoi 1958 [Muridae]
  • Rhagomys, Thomas 1917 [Muridae]
  • Rhinocricetus, Kretzoi 1956 [Cricetidae]
  • Rhizomyoides, Black 1972 [Spalacidae]
  • Rhizomys, Gray 1831 [Spalacidae]
  • Rhizospalax, Miller and Gidley 1919 [Cricetidae]
  • Rhodanomys, Depéret and Douxami 1902 [Eomyidae]
  • Rhynchocyon, Peters 1847 [Macroscelididae]
  • Rhynchotheriini, tribe, Hay 1922 [Gomphotheriidae]
  • Ritteneria, Schaub 1951 [Eomyidae]
  • Robiaciinae, subfamily, Sudre 1977 [Anoplotheriidae]
  • Robiatherium, J. Sudre 1988 [Anoplotheriidae]
  • Romanocastor, Radulesco and Samson 1967 [Castoridae]
  • Rotundomys, P. Mein 1966 [Cricetidae]
  • Ruscinomys, Depéret 1890 [Cricetidae]
  • Russellites, L. Van Valen 1965 [Paroxyclaenidae]
  • Saccostomus, Peters 1846 [Muridae]
  • Saidomys, James and Slaughter 1974 [Muridae]
  • Samonycteris, P. Revilliod 1919 [Samonycteris]
  • Samonycteris majori, P. Revilliod 1919 [Samonycteris majori]
  • Sarcophilus, F. Cuvier 1837 [Dasyuridae]
  • Sayimys, A.E. Wood 1937 [Ctenodactylidae]
  • Saykanomys, N.S. Shevyreva 1972 [Rodentia]
  • Schistomys, Ameghino 1887 [Eocardiidae]
  • Schistopleurum, Nodot 1857 [Glyptodontidae]
  • Schizochoerini, tribe, Golpe-Posse 1972 [Tayassuidae]
  • Schizophagus, Lange-Badre 1975 [Hyaenodontidae]
  • Schoinobates, Lesson 1842 [Petauridae]
  • Sciamys, Ameghino 1887 [Rodentia]
  • Sciurodon, Schlosser 1884 [Aplodontidae]
  • Sciuroides, C. J. F. Major 1873 [Pseudosciuridae]
  • Sciuromys, Schlosser 1884 [Theridomyidae]
  • Sciurotamias, Miller 1901 [Sciuridae]
  • Sclerocalyptini, tribe, R. Hoffstetter 1958 [Glyptodontidae]
  • Scleromys, Ameghino 1887 [Dinomyidae]
  • Scotaeumys, Ameghino 1887 [Chinchillidae]
  • Scotamys, Loomis 1914 [Chinchillidae]
  • Sespiini, tribe, Schultz and Falkenbach 1968 [Merycoidodontidae]
  • Setonix, Lesson 1842 [Macropodidae]
  • Sicista, Gray 1827 [Zapodidae]
  • Simonimys, R. Lavocat 1973 [Kenyamyidae]
  • Sinocastor, Young 1934 [Castoridae]
  • Sipalocyon, Ameghino 1887 [Sparassodonta]
  • Sivacanthion, Colbert 1933 [Hystricidae]
  • Sivameryx, Lydekker 1883 [Anthracotheriidae]
  • Sivapithecus, Pilgrim 1910 [Hominidae]
  • Sivapterodon [Hyaenodonta]
  • Sminthoides, Schlosser 1924 [Dipodidae]
  • Sminthopsis, Thomas 1887 [Dasyuridae]
  • Sminthozapus, A. Sulimski 1962 [Zapodidae]
  • Spalacotheriidae, family, Marsh 1887 [Spalacotheriidae]
  • Spalax, Güldenstadt 1770 [Spalacidae]
  • Spaniella, Crusafont-Pairo and Russell 1968 [Paroxyclaenidae]
  • Spaniomys, Ameghino 1877 [Rodentia]
  • Sparassocynidae, family, Reig 1958 [Sparassocynidae]
  • Squamata, order, Huxley 1872 [Pholidota]
  • Stachomys, Kowalski 1960 [Cricetidae]
  • Stagodontidae, family, O. C. Marsh 1889 [Stagodontidae]
  • Steatomys, Peters 1846 [Muridae]
  • Stegodontinae, subfamily, Osborn 1918 [Elephantidae]
  • Stegosimpsonia, Vizcaino 1994 [Dasypodidae]
  • Steiromys, F. Ameghino 1887 [Rodentia]
  • Stemmatopis, Gloger 1841 [Phocidae]
  • Stemmatops, Van der Hoeven 1855 [Phocidae]
  • Stenorhynchus, Lamarck 1818 [Inachidae]
  • Stephanoceras, Colbert 1936 [Lagomerycidae]
  • Stephanomys, Schaub 1938 [Muridae]
  • Sthenmerus, De Vis 1883 [Diprotodontidae]
  • Sthenurus, R. Owen 1874 [Diprotodontia]
  • Stichomys, Ameghino 1887 [Rodentia]
  • Stilotherium, Ameghino 1887 [Caenolestidae]
  • Strabosodon, Ameghino 1891 [Mylodontidae]
  • Stromaphoropsis, Kraglevich 1932 [Glyptodontidae]
  • Stromaphorus, Castellanos 1926 [Glyptodontidae]
  • Stromatherium, Castellanos 1953 [Stromatherium]
  • Strophostephanos, Ameghino 1891 [Myocastoridae]
  • Stylocynus, Mercerat 1917 [Sparassodonta]
  • Suevosciurus, R. Dehm 1937 [Theridomyidae]
  • Suiformes, suborder, Jaeckel 1911 [Artiodactyla]
  • Suini, tribe, Gray 1821 [Suidae]
  • Synaphodus, Pomel 1848 [Dichobunidae]
  • Synaptodon, De Vis 1889 [Macropodidae]
  • Tachyoryctoides, Bohlin 1937 [Muridae]
  • Tachytypotherium, Roth 1903 [unclassified genus]
  • Taeniodonta, suborder (E.D. Cope 1876) [Mammalia]
  • Taeniolabididae, family, W. Granger and G. G. Simpson 1929 [Taeniolabididae]
  • Talpoidea, superfamily, Fischer de Waldheim 1817 [Mammalia]
  • Tamquammys, Shevyreva 1971 [Rodentia]
  • Tarnomys, Hartenberger and N. Schmidt-Kittler 1976 [Pseudosciuridae]
  • Tarsipedidae, family [Tarsipedidae]
  • Tatera, Lataste 1882 [Muridae]
  • Tathiodon, G.G. Simpson 1927 [Paurodontidae]
  • Teisseiria, Kraglievich 1932 [Glyptodontidae]
  • Terrarboreus, Shevyreva 1971 [Chapattimyidae]
  • Testouromys, Robinson and C.C. Black 1973 [Ctenodactylidae]
  • Tetrastylus, Ameghino 1886 [Dinomyidae]
  • Thalerimys, H. Tobien 1972 [Theridomyidae]
  • Thallomys, Thomas 1920 [Muridae]
  • Theridomys, Jourdan 1837 [Theridomyidae]
  • Theridomys (Paradelomys), L. Thaler 1966 [Theridomyidae]
  • Theropithecus, I. Geoffroy 1843 [Cercopithecidae]
  • Thomasia, F. Poche 1908 [Mammalia]
  • Thoracophorus, Gervais and Ameghino 1880 [Glyptodontidae]
  • Thryonomys, Fitzinger 1867 [Thryonomyidae]
  • Thylacinidae, family, C. L. Bonaparte 1838 [Thylacinidae]
  • Thylacinus, C. J. Temminck 1824 [Thylacinidae]
  • Thylacoleo, Owen 1852 [Thylacoleonidae]
  • Thylacoleonidae, family, Gill 1872 [Thylacoleonidae]
  • Thylacomorphus, Gervais 1876 [Anoplotheriidae]
  • Thylacomyidae, subfamily (Bensley 1903) [Peramelemorphia]
  • Thylacosmilidae, family, Riggs 1933 [Thylacosmilidae]
  • Thylacosmilus, Riggs 1933 [Thylacosmilidae]
  • Thylogale, Gray 1837 [Macropodidae]
  • Tillodontia, suborder (Marsh 1875) [Mammalia]
  • Tinodontidae, family, Marsh 1887 [Tinodontidae]
  • Tolypeutini, tribe, Gray 1865 [Dasypodidae]
  • Trabalia, Kraglevich 1932 [Glyptodontidae]
  • Tramyocastor, Rusconi 1936 [Echimyidae]
  • Treposciurus, N. Schmidt-Kittler 1970 [Pseudosciuridae]
  • Trichosurus, Lesson 1828 [Phalangeridae]
  • Tricuspiodon, Lemoine 1885 [Hyopsodontidae]
  • Trigonolophodon, S. Roth 1903 [Homalodotheriidae]
  • Trigonomys, K. Heissig 1979 [Aplodontidae]
  • Trilophomys, Depéret 1892 [Cricetidae]
  • Trischizolagus, Radulesco and Samson 1967 [Leporidae]
  • Troposodon, Bartholomai 1967 [Macropodidae]
  • Tugrigbaatar, Z. Kielan-Jaworowska and D Dashzeveg 1978 [Djadochtatheriidae]
  • Tupaia, Raffles 1821 [Tupaiidae]
  • Turkomys, H. Tobien 1978 [Cricetidae]
  • Tyrrhenicola, Forsyth Major 1905 [Cricetidae]
  • Ungaromys, Kormos 1932 [Cricetidae]
  • Uruguayurus, Mones 1987 [Glyptodontidae]
  • Urumacotherium, Bocquentin-Villanueva 1983 [Mylodontidae]
  • Utaetini, tribe, Simpson 1945 [Dasypodidae]
  • Valerimys [Muridae]
  • Vasseuromys, S. Baudelot and de Bonis 1966 [Gliridae]
  • Vetelia, F. Ameghino 1891 [Dasypodidae]
  • Veterilepus, Radulesco and Samson 1967 [Leporidae]
  • Victoriapithecus, G.H.R. von Koenigswald 1969 [Victoriapithecidae]
  • Villanyia, Kretzoi 1956 [Cricetidae]
  • Vombatidae, family, Burnett 1829 [Vombatidae]
  • Vombatoidea, superfamily, Iredole and Troughton 1934 [Mammalia]
  • Vombatus, E. Saint-Hillaire 1803 [Vombatidae]
  • Vulcanisciurus, R. Lavocat 1973 [Sciuridae]
  • Wakamatha, Archer and Rich 1979 [Dasyuromorphia]
  • Wallabia, Trouessart 1905 [Macropodidae]
  • Wanglia, Van Valen 1988 [Wangliidae]
  • Wangliidae, family, Van Valen 1988 [Wangliidae]
  • Windhausenia, Kraglievich 1930 [Macraucheniidae]
  • Woodomys, Shevyreva 1971 [Ctenodactylidae]
  • Woutersia, D. Sigogneau-Russell 1983 [Woutersiidae]
  • Wynyardia, Spencer 1901 [Wynyardiidae]
  • Wynyardiidae, family, Osgood 1921 [Wynyardiidae]
  • Xenodontomys, Kraglievich 1927 [Octodontidae]
  • Xenohystrix, Greenwood 1955 [Hystricidae]
  • Xenothrix, Williams and Koopman 1952 [Primates]
  • Xerus, Hemprich and Ehrenberg 1833 [Sciuridae]
  • Xiphuroides, Castellanos 1927 [Glyptodontidae]
  • Yindirtemys, Bohlin 1946 [Ctenodactylidae]
  • Youngofiber, Chow and Li 1978 [Castoridae]
  • Yunnanochoerus, van der Made and Han 1994 [Suidae]
  • Zamolxifiber, Radulesco and Samson 1967 [Castoridae]
  • Zelotomys, Osgood 1910 [Muridae]
  • Zenkerella, Matschie 1898 [Anomaluridae]
  • Zramys, Jaeger and Michaux 1973 [Cricetidae]
  • Zygomaturus, R. Owen 1858 [Diprotodontidae]