Taxonomic names from J. Alroy 2002

  • Adunator, D. Russell 1964 [Macroscelidea]
  • Agnotocastor coloradensis, R. Wilson 1949 [Castoridae]
  • Agnotocastor galushai, Emry 1972 [Castoridae]
  • Agnotocastor readingi, Korth 1988 [Castoridae]
  • Agriotherium, Wagner 1837 [Ursidae]
  • Aguafriamys, J. Wilson and Runkel 1991 [Eomyidae]
  • Aguafriamys raineyi, J. Wilson and Runkel 1991 [Eomyidae]
  • Ailurus anglicus, Dawkins 1888 [Ailuridae]
  • Alilepus, Dice 1931 [Leporidae]
  • Allomys stirtoni, Klingener 1968 [Allomyidae]
  • Alopecocyon, Camp and Vanderhoof 1940 [Ailuridae]
  • Alopex, Kaup 1829 [Canidae]
  • Aluralagus, Downey 1968 [Leporidae]
  • Amphechinus, Aymard 1850 [Erinaceidae]
  • Amphicynodon, Filhol 1881 [Ursidae]
  • Amphicyon, Lartet 1836 [Amphicyonidae]
  • Amphicyon reinheimeri, Cook 1926 [Amphicyonidae]
  • Amphilemur, F. Heller 1935 [Amphilemuridae]
  • Anancus bensonensis, Gidley 1926 [Gomphotheriidae]
  • Anchitheriomys, Roger 1885 [Castoridae]
  • Anchitherium, von Meyer 1844 [Equidae]
  • Ancodon, Pomel 1847 [Anthracotheriidae]
  • Anisonchus fortunatus, Simpson 1932 [Periptychidae]
  • Anisonyx rufa, Rafinesque 1817 [Aplodontidae]
  • Anouroneomys magnus, Hutchison and Bown 1980 [Soricidae]
  • Antilocapra, Ord 1818 [Antilocapridae]
  • Antilocapra americana (Ord 1815) [Antilocapridae]
  • Anzanycteris, J. White 1969 [Vespertilionidae]
  • Anzanycteris anzensis, J. White 1969 [Vespertilionidae]
  • Apheliscus, Cope 1875 [Apheliscidae]
  • Aphelops, Owen 1845 [Rhinocerotidae]
  • Aphronorus simpsoni, Gazin 1938 [Pentacodontidae]
  • Aplocerus, Hamilton-Smith 1827 [Bovidae]
  • Aplodontia alexandrae, Furlong 1910 [Aplodontidae]
  • Apternodus baladontus, Asher et al. 2002 [Apternodontidae]
  • Apternodus dasophylakas, Asher et al. 2002 [Apternodontidae]
  • Apternodus major, Asher et al. 2002 [Apternodontidae]
  • Arctisorex, Hutchison and Harington 2002 [Soricidae]
  • Arctisorex polaris, Hutchison and Harington 2002 [Soricidae]
  • Arctocyon, Blainville 1841 [Arctocyonidae]
  • Arctocyonides, Lemoine 1891 [Arctocyonidae]
  • Arctotherium, Bravard 1857 [Ursidae]
  • Arvicola pauperrima, Cooper 1868 [Cricetidae]
  • Barylambda, Patterson 1937 [Barylambdidae]
  • Bassariscus, Coues 1887 [Procyonidae]
  • Bison, Hamilton-Smith 1827 [Bovidae]
  • Bison priscus (Bojanus 1827) [Bovidae]
  • Blackia, P. Mein 1970 [Sciuridae]
  • Blarina, Gray 1838 [Soricidae]
  • Blastocerus extraneus, Simpson 1928 [Cervidae]
  • Blastomeryx, Cope 1877 [Moschidae]
  • Bootherium, Harlan 1825 [Bovidae]
  • Bos grunniens, Linnaeus 1766 [Bovidae]
  • Bos scaphoceras [Bovidae]
  • Bothriodon, Aymard 1846 [Anthracotheriidae]
  • Brachyerix, Matthew 1933 [Erinaceidae]
  • Brachyerix incertis (W. D. Matthew 1924) [Erinaceidae]
  • Brachyerix macrotis, Matthew 1933 [Erinaceidae]
  • Brachypotherium, Roger 1904 [Rhinocerotidae]
  • Brachyprotoma, Brown 1908 [Mephitidae]
  • Camelops minidokae, Hay 1927 [Camelidae]
  • Canis latrans, Say 1823 [Canidae]
  • Canis rufus, Audubon and Bachman 1851 [Canidae]
  • Capatanka gaulodon [unclassified species]
  • Capra tatarica, Linnaeus 1758 [Bovidae]
  • Capromeryx, Matthew 1902 [Antilocapridae]
  • Capromeryx furcifer, Matthew 1902 [Antilocapridae]
  • Carpodaptes rosei () [Carpolestidae]
  • Carpodaptes stonleyi, R. C. Fox 2002 [Carpolestidae]
  • Castor canadensis, Kuhl 1820 [Castoridae]
  • Catopsalis calgariensis, L. Russell 1926 [Taeniolabididae]
  • Cedromus, R. Wilson 1949 [Sciuridae]
  • Cedromus wardi, R. Wilson 1949 [Sciuridae]
  • Cephalogale, Jourdan 1862 [Ursidae]
  • Ceratogaulus, Matthew 1902 [Mylagaulidae]
  • Ceratogaulus rhinocerus, Matthew 1902 [Mylagaulidae]
  • Cerdocyon, Hamilton-Smith 1839 [Canidae]
  • Chaetodipus, Merriam 1889 [Heteromyidae]
  • Chelonia couperi, Harlan 1842 [Megatheriidae]
  • Chiromyoides, Stehlin 1916 [Plesiadapidae]
  • Chriacus, Cope 1883 [Arctocyonidae]
  • Chriacus orthogonius, L. Russell 1929 [Arctocyonidae]
  • Churcheria, Storer 2002 [Ischyromyidae]
  • Cimolestes magnus, Clemens and Russell 1965 [Creodonta]
  • Cimolodon, O. C. Marsh 1889 [Cimolodontidae]
  • Clethrionomys, Tilesius 1850 [Cricetidae]
  • Clinopternodus, Clark 1937 [Micropternodontidae]
  • Coendou cascoensis, J. A. White 1970 [Erethizontidae]
  • Conacodon, Matthew 1897 [Periptychidae]
  • Condylura, Illinger 1811 [Talpidae]
  • Conepatus, Gray 1837 [Mephitidae]
  • Corynorhinus tetralophodon, Handley 1955 [Vespertilionidae]
  • Coryphodon lobatus, Cope 1877 [Coryphodontidae]
  • Coryphodon oweni, Hebert 1856 [Coryphodontidae]
  • Cratogeomys castanops (Baird 1852) [Geomyidae]
  • Cricetodipus parvus, Peale 1848 [Heteromyidae]
  • Cricetodon, Lartet 1851 [Cricetidae]
  • Cricetus talpoides, Richardson 1828 [Geomyidae]
  • Cryptopterus, Mein 1970 [Sciuridae]
  • Cryptotis, Pomel 1848 [Soricidae]
  • Cryptotis kansasensis, Hibbard 1957 [Soricidae]
  • Cryptotis meadensis, Hibbard 1953 [Soricidae]
  • Cryptotis peregrina, Merriam 1895 [Soricidae]
  • Cudahyomys moorei, Hibbard 1944 [Cricetidae]
  • Cuon, Hodgson 1838 [Canidae]
  • Cuvieronius arellanoi, Ochoterena and Silva 1970 [Gomphotheriidae]
  • Cynelos, Jourdan 1862 [Amphicyonidae]
  • Cynodictis gracilis, Filhol 1874 [Ursidae]
  • Cynomys, Rafinesque 1817 [Sciuridae]
  • Cynomys leucurus, C. Merriam 1890 [Sciuridae]
  • Cynomys mexicanus, C. Merriam 1892 [Sciuridae]
  • Cynomys parvidens, J. Allen 1905 [Sciuridae]
  • Cynomys vetus, Hibbbard 1942 [Sciuridae]
  • Daphoenus lambei, L. Russell 1934 [Amphicyonidae]
  • Dasypterus golliheri, Hibbard 1960 [Vespertilionidae]
  • Delphodon praenuntius, L. Russell 1928 [Cimolestidae]
  • Desmodus magnus, Gut 1959 [Phyllostomidae]
  • Desmodus stocki, J. Jones 1958 [Phyllostomidae]
  • Deuterogonodon montanus, Gidley 1935 [Arctocyonidae]
  • Dicrostonyx, Gloger 1841 [Cricetidae]
  • Didelphis pygmaea (Scott 1894) [Mammalia]
  • Didelphis virginiana, Kerr 1792 [Didelphimorphia]
  • Didelphodon padanicus, Cope 1892 [Stagodontidae]
  • Didelphodus, E.D. Cope 1882 [Leptictidae]
  • Didymictis vancleveae, Robinson 1966 [Viverravidae]
  • Dinictis felina, Leidy 1854 [Nimravidae]
  • Dinofelis, Zdansky 1924 [Felidae]
  • Diplolophus, Troxell 1923 [Rodentia]
  • Diplolophus insolens, Troxell 1923 [Rodentia]
  • Dipodomys, Gray 1841 [Heteromyidae]
  • Dipodomys agilis, Gambel 1848 [Heteromyidae]
  • Dipodomys deserti, Stephens 1887 [Heteromyidae]
  • Dipodomys ingens (Merriam 1904) [Heteromyidae]
  • Dipodomys merriami, Mearns 1890 [Heteromyidae]
  • Dipodomys ordii, Woodhouse 1853 [Heteromyidae]
  • Dipodomys spectabilis, Merriam 1890 [Heteromyidae]
  • Dipoides, Jaeger 1835 [Castoridae]
  • Dipoides wilsoni, Hibbard 1949 [Castoridae]
  • Dipus hudsonius, Zimmermann 1780 [Zapodidae]
  • Dissacus, Cope 1881 [Mesonychidae]
  • Dolomys minor, Kretzoi 1955 [Cricetidae]
  • Domnina thompsoni, Simpson 1941 [Soricidae]
  • Domninoides mimicus, R. L. Wilson 1968 [Talpidae]
  • Dorcameryx optimae, Reed and Longnecker 1928 [Antilocapridae]
  • Drepanodon, Nesti 1826 [Felidae]
  • Dysopes glaucinus, Wagner 1843 [Molossidae]
  • Ectocion, Cope 1882 [Phenacodontidae]
  • Ectoganus, Cope 1874 [Mammalia]
  • Ectoganus copei, R. M. Schoch 1981 [Mammalia]
  • Ectoganus gliriformis, Cope 1874 [Mammalia]
  • Elphidotarsius, Gidley 1923 [Carpolestidae]
  • Elphidotarsius florencae, Gidley 1923 [Carpolestidae]
  • Elymys, Korth and Emry 1989 [Zapodidae]
  • Elymys complexus, Korth and Emry 1989 [Zapodidae]
  • Enhydra, Fleming 1822 [Mustelidae]
  • Enhydriodon, Falconer 1868 [Mustelidae]
  • Entelodon, A. Aymard 1846 [Entelodontidae]
  • Entoptychus lambdoideus, Cope 1881 [Entoptychidae]
  • Entoptychus minor, Cope 1881 [Entoptychidae]
  • Eomellivora, Zdansky 1924 [Mustelidae]
  • Eomellivora wimani, Zdansky 1924 [Mustelidae]
  • Eomys, Schlosser 1884 [Eomyidae]
  • Epoicotherium, Simpson 1927 [Epoicotheriidae]
  • Equus jubatus, Hay 1927 [Equidae]
  • Equus nearcticus, Blake 1863 [Equidae]
  • Equus parastylidens, Mooser 1959 [Equidae]
  • Equus pectinatus, Cope 1901 [Equidae]
  • Eremotherium, Spillmann 1948 [Megatheriidae]
  • Erethizon, Cuvier 1822 [Erethizontidae]
  • Esthonyx, E. D. Cope 1874 [Esthonychidae]
  • Esthonyx bisulcatus, E. D. Cope 1874 [Esthonychidae]
  • Eucastor, Allen 1877 [Castoridae]
  • Eucastor phillisi, R. L. Wilson 1968 [Castoridae]
  • Euceratherium, Furlong and Sinclair 1904 [Bovidae]
  • Euceratherium collinum, E. L. Furlong and W. J. Sinclair 1904 [Bovidae]
  • Euhapsis breugerorum, L. Martin 1987 [Castoridae]
  • Euhapsis ellicottae, L. Martin 1987 [Castoridae]
  • Eusmilus, Gervais 1876 [Nimravidae]
  • Fiber oregonus, Hollister 1911 [Cricetidae]
  • Florentiamys, A.E. Wood 1936 [Florentiamyidae]
  • Florentiamys loomisi, A. Wood 1936 [Florentiamyidae]
  • Forstercooperia minuta, Lucas et al. 1981 [Paraceratheriidae]
  • Fossorcastor, L. Martin 1987 [Castoridae]
  • Fossorcastor greeni, L. Martin 1987 [Castoridae]
  • Galera macrodon, Cope 1868 [Mustelidae]
  • Geomys, Rafinesque 1817 [Geomyidae]
  • Geomys pinetis, Rafinesque 1817 [Geomyidae]
  • Glaucomys, Thomas 1908 [Sciuridae]
  • Glis canadensis, Erxleben 1777 [Sciuridae]
  • Glossotherium, Owen 1840 [Mylodontidae]
  • Glossotherium garbanii, Montellano and Carranza-Castaneda 1981 [Mylodontidae]
  • Glyptotherium arizonae, Gidley 1926 [Glyptodontidae]
  • Gobiconodon, Trofimov 1978 [Gobiconodontidae]
  • Gomphotherium, Burmeister 1837 [Gomphotheriidae]
  • Goniacodon, Scott 1892 [Triisodontidae]
  • Grangeria, Zdansky 1930 [Perissodactyla]
  • Gregorymys, A. Wood 1936 [Entoptychidae]
  • Gulo, Storr 1780 [Mustelidae]
  • Hapalodectes anthracinus, Zhou and Gingerich 1991 [Hapalodectidae]
  • Haplomys, Miller and Gidley 1918 [Allomyidae]
  • Harrymys canadensis, Korth 1995 [Heteromyidae]
  • Heliscomys woodi, McGrew 1941 [Heliscomyidae]
  • Hemicyon, Lartet 1851 [Ursidae]
  • Herpailurus, Severtzov 1858 [Felidae]
  • Hesperosorex, Hibbard 1957 [Soricidae]
  • Hesperosorex lovei, Hibbard 1957 [Soricidae]
  • Heteromys irroratus, Gray 1868 [Heteromyidae]
  • Hippotherium, Kaup 1832 [Equidae]
  • Hippotherium dolichops [unclassified species]
  • Histiotus stocki (R. A. Stirton 1931) [Vespertilionidae]
  • Holmesina floridanus (Robertson 1976) [Pampatheriidae]
  • Homotherium, Fabrini 1890 [Felidae]
  • Hoplictis, L. Ginsburg 1961 [Mustelidae]
  • Hyaenodon, Laizer and Parieu 1838 [Hyaenodontidae]
  • Hyaenodon mustelinus, Scott 1894 [Hyaenodontidae]
  • Hypolagus furlongi, Gazin 1934 [Leporidae]
  • Hypolagus regalis, Hibbard 1939 [Leporidae]
  • Hypudaeus leucogaster, Wied-Neuwied 1841 [Cricetidae]
  • Hyracodon browni, L. Russell 1934 [Hyracodontidae]
  • Hyracotherium, Owen 1841 [Palaeotheriidae]
  • Hystricops browni, Shotwell 1963 [Castoridae]
  • Indarctos, Pilgrim 1913 [Ursidae]
  • Ischnoglossa nivalis, Saussure 1860 [Phyllostomidae]
  • Ischyrotomus littoralis, R. Wilson 1949 [Ischyromyidae]
  • Jacobsomys, Czaplewski 1987 [Cricetidae]
  • Jacobsomys verdensis, Czaplewski 1987 [Cricetidae]
  • Jemezius szalayi, Beard 1987 [Omomyidae]
  • Kansasimys, A. Wood 1936 [Eomyidae]
  • Kansasimys dubius, A. Wood 1936 [Eomyidae]
  • Labidolemur major, West 1972 [Apatemyidae]
  • Lagomys collaris, Nelson 1893 [Ochotonidae]
  • Lagomys palatinus (Cope 1871) [Ochotonidae]
  • Lagurus, Gloger 1841 [Cricetidae]
  • Lasiopodomys, Lataste 1887 [Cricetidae]
  • Lasiurus cinereus (Palisot de Beauvois 1796) [Vespertilionidae]
  • Lemmiscus, Thomas 1912 [Cricetidae]
  • Lemmus, Link 1795 [Cricetidae]
  • Lemmus sibiricus, Ognev 1947 [Cricetidae]
  • Leptictis, Leidy 1868 [Leptictidae]
  • Leptictis haydeni, Leidy 1868 [Leptictidae]
  • Leptomeryx significans (Russell 1954) [Leptomerycidae]
  • Lepus alleni, Mearns 1890 [Leporidae]
  • Lepus americanus, Erxleben 1777 [Leporidae]
  • Lepus arcticus, Ross 1819 [Leporidae]
  • Lepus californicus, Gray 1837 [Leporidae]
  • Lepus callotis, Wagler 1830 [Leporidae]
  • Lepus townsendii, Bachman 1839 [Leporidae]
  • Limnonyx, Crusafont Pairo 1950 [Mustelidae]
  • Liodontia, Miller and Gidley 1918 [Aplodontidae]
  • Lupus gigas, Townsend 1850 [Canidae]
  • Macrocranion, Weitzel 1949 [Amphilemuridae]
  • Macrognathomys, Hall 1930 [Zapodidae]
  • Macrognathomys nanus, Hall 1930 [Zapodidae]
  • Mammut, Blumenbach 1799 [Mammutidae]
  • Mammuthus, Brookes 1828 [Elephantidae]
  • Marmota, Frisch 1775 [Sciuridae]
  • Marsholestes, McKenna 1992 [Geolabididae]
  • Martes, Frisch 1775 [Mustelidae]
  • Martes stirtoni, R. L. Wilson 1968 [Mustelidae]
  • Martinogale nambiana, Cope 1874 [Mephitidae]
  • Mazama dorsata, Rafinesque 1817 [Bovidae]
  • Megalagus, Walker 1931 [Leporidae]
  • Megalagus dawsoni, Black 1961 [Leporidae]
  • Megalamynodon, H. Wood 1945 [Amynodontidae]
  • Megalamynodon regalis, H. Wood 1945 [Amynodontidae]
  • Megalesthonyx, Rose 1971 [Esthonychidae]
  • Megalesthonyx hopsoni, Rose 1971 [Esthonychidae]
  • Megalonyx, Harlan 1825 [Megalonychidae]
  • Megalonyx jeffersonii (Desmarest 1822) [Megalonychidae]
  • Megalonyx leptostomus, Cope 1893 [Megalonychidae]
  • Megalonyx wheatleyi, Cope 1871 [Megalonychidae]
  • Megantereon, Croizet and Jobert 1828 [Felidae]
  • Meniscotherium, Cope 1874 [Phenacodontidae]
  • Meniscotherium chamense, Cope 1874 [Phenacodontidae]
  • Mentoclaenodon, Weigelt 1960 [Arctocyonidae]
  • Mephitis, Cuvier 1800 [Mephitidae]
  • Mephitis macroura, Lichtenstein 1832 [Mephitidae]
  • Merychippus shirleyae [unclassified species]
  • Mesodma thompsoni, Clemens 1964 [Neoplagiaulacidae]
  • Mesogaulus, Riggs 1899 [Mylagaulidae]
  • Mesogaulus ballensis, Riggs 1899 [Mylagaulidae]
  • Microdipodops, Merriam 1891 [Geomyidae]
  • Microeutypomys, Walton 1993 [Eutypomyidae]
  • Microeutypomys karenae, Walton 1993 [Eutypomyidae]
  • Microparamys sambucus, Korth and Emry 1989 [Ischyromyidae]
  • Microsyops, Leidy 1872 [Microsyopidae]
  • Microtoscoptes, Schaub 1934 [Cricetidae]
  • Microtus, Schrank 1798 [Cricetidae]
  • Microtus miurus, Osgood 1901 [Cricetidae]
  • Microtus pinetorum (Le Conte 1830) [Cricetidae]
  • Mimomys, Forsyth-Major 1902 [Cricetidae]
  • Mithrandir, Cifelli 1983 [Periptychidae]
  • Monosaulax skinneri, Stout 1999 [Castoridae]
  • Montanamus, Ostrander 1983 [Eomyidae]
  • Montanamus bjorki, Ostrander 1983 [Eomyidae]
  • Mormoops, Leach 1821 [Phyllostomidae]
  • Mormoops megaphylla, Peters 1864 [Phyllostomidae]
  • Mus humulis, Audubon and Bachman 1841 [Cricetidae]
  • Musculus leucopus, Rafinesque 1818 [Cricetidae]
  • Mustela eversmanni, Lesson 1827 [Mustelidae]
  • Mustela frenata, Lichtenstein 1831 [Mustelidae]
  • Mustela nigripes (Audubon and Bachman 1851) [Mustelidae]
  • Mustela nivalis, Linnaeus 1766 [Mustelidae]
  • Mylohyus, Cope 1869 [Tayassuidae]
  • Myotis grisecens, A. Howell 1909 [Vespertilionidae]
  • Myotis mangamolaris, Choate and Hall 1967 [Vespertilionidae]
  • Myotis rectidens, Choate and Hall 1967 [Vespertilionidae]
  • Myotis sodalis, Miller and G. Allen 1928 [Vespertilionidae]
  • Myotis thysanodes, Miller 1897 [Vespertilionidae]
  • Myrmecoboides, Gidley 1915 [Leptictidae]
  • Myrmecoboides montanensis, Gidley 1915 [Leptictidae]
  • Mystipterus, Hall 1930 [Talpidae]
  • Mystipterus vespertilio, Hall 1930 [Talpidae]
  • Napaeozapus, G. Miller 1900 [Zapodidae]
  • Nasua, Storr 1780 [Procyonidae]
  • Neofiber, F. W. True 1884 [Cricetidae]
  • Neofiber alleni, True 1884 [Cricetidae]
  • Neofiber leonardi, Hibbard 1943 [Cricetidae]
  • Neomeryx finni, Parks 1925 [Antilocapridae]
  • Neoplagiaulax, Lemoine 1882 [Neoplagiaulacidae]
  • Neotamias, Howell 1929 [Sciuridae]
  • Neotoma, Say and Ord 1825 [Cricetidae]
  • Neotoma albigula, Hartley 1894 [Cricetidae]
  • Neotoma fuscipes, Baird 1858 [Cricetidae]
  • Neotoma lepida, Thomas 1893 [Cricetidae]
  • Neotoma mexicana, Baird 1855 [Cricetidae]
  • Neotoma micropus, Baird 1855 [Cricetidae]
  • Neotoma ozarkensis, Brown 1908 [Cricetidae]
  • Neotoma stephensi, Goldman 1905 [Cricetidae]
  • Neotomodon, Merriam 1898 [Neotomodon]
  • Neotomodon alstoni, Merriam 1898 [Neotomodon alstoni]
  • Neurotrichus, Günther 1880 [Talpidae]
  • Niglarodon, Black 1961 [Aplodontidae]
  • Niglarodon koerneri, Black 1961 [Aplodontidae]
  • Nimravus, Cope 1879 [Nimravidae]
  • Niptomomys favorum, Strait 2001 [Microsyopidae]
  • Nothrotheriops, Hoffstetter 1954 [Nothrotheriidae]
  • Nothrotheriops texanus (Hay 1916) [Nothrotheriidae]
  • Notiosorex, Baird 1877 [Soricidae]
  • Nyctinomus brasiliensis, Geoffroy 1824 [Molossidae]
  • Ochotona, Link 1795 [Ochotonidae]
  • Ochrotomys, Osgood 1909 [Cricetidae]
  • Odocoileus, Rafinesque 1832 [Cervidae]
  • Odocoileus brachyodontus, Oelrich 1953 [Cervidae]
  • Oligobunis, Cope 1881 [Mustelidae]
  • Onager, Brisson 1762 [Equidae]
  • Ondatra, Link 1795 [Cricetidae]
  • Onychomys, Baird 1858 [Cricetidae]
  • Oreamnos, Rafinesque 1817 [Bovidae]
  • Oreamnos americanus (Blainville 1816) [Bovidae]
  • Oregonomys, Martin 1984 [Heteromyidae]
  • Oregonomys pebblespringsensis, Martin 1984 [Heteromyidae]
  • Oreolagus nebrascensis, McGrew 1941 [Ochotonidae]
  • Orthogeomys, C. Merriam 1895 [Geomyidae]
  • Oryctomys bottae, Eydoux and Gervais 1836 [Geomyidae]
  • Oryctotherium missouriense, Harlan 1841 [Mylodontidae]
  • Oryzomys, Baird 1857 [Cricetidae]
  • Oryzomys palustris, Harlan 1837 [Cricetidae]
  • Osmotherium, Cope 1896 [Mephitidae]
  • Osmotherium spelaeum, Cope 1896 [Mephitidae]
  • Otognosis longimembris, Coues 1875 [Heteromyidae]
  • Ovibos, Blainville 1816 [Bovidae]
  • Ovis canadensis, Shaw 1804 [Bovidae]
  • Ovis dalli, Nelson 1884 [Bovidae]
  • Oxyacodon, Osborn and Earle 1895 [Periptychidae]
  • Oxyacodon apiculatus, Osborn and Earle 1895 [Periptychidae]
  • Oxyaena, E. D. Cope 1874 [Oxyaenidae]
  • Oxyaena forcipata, Cope 1874 [Oxyaenidae]
  • Oxyclaenus, Cope 1884 [Arctocyonidae]
  • Pachyaena gigantea, Osborn and Wortman 1892 [Mesonychidae]
  • Paciculus montanus, Black 1961 [Cricetidae]
  • Pagonomus, D. Russell 1964 [Pantolestidae]
  • Palaechthon alticuspis, Gidley 1923 [Primates]
  • Palaeocastor, Leidy 1869 [Castoridae]
  • Palaeoerinaceus, Filhol 1897 [Erinaceidae]
  • Palaeogale, von Meyer 1846 [Palaeogalidae]
  • Palaeolama, Gervais 1869 [Camelidae]
  • Palaeonictis, de Blainville 1842 [Oxyaenidae]
  • Palaeonictis occidentalis, Osborn 1892 [Oxyaenidae]
  • Palaeoryctes, Matthew 1913 [Palaeoryctidae]
  • Palaeoryctes puercensis, Matthew 1913 [Palaeoryctidae]
  • Palaeosinopa, Matthew 1901 [Pantolestidae]
  • Pampatherium, Ameghino 1875 [Pampatheriidae]
  • Panthera, Oken 1816 [Felidae]
  • Pantolambda cavirictus, Cope 1883 [Pantolambdidae]
  • Pappogeomys, C. Merriam 1895 [Geomyidae]
  • Pappogeomys alcorni, R. Russell 1957 [Geomyidae]
  • Paradjidaumo, Burke 1934 [Eomyidae]
  • Paradjidaumo validus, Korth 1980 [Eomyidae]
  • Parailurus, Schlosser 1899 [Ailuridae]
  • Paramys, Leidy 1871 [Ischyromyidae]
  • Paramys copei, Loomis 1907 [Ischyromyidae]
  • Paramys delicatus, Leidy 1871 [Ischyromyidae]
  • Paramys excavatus, Loomis 1907 [Ischyromyidae]
  • Paranamatomys, Korth 1992 [Eomyidae]
  • Parascalops, True 1894 [Talpidae]
  • Parataxidea, Zdansky 1924 [Mustelidae]
  • Paromomys, Gidley 1923 [Paromomyidae]
  • Paromomys alticuspis, Gidley 1923 [Paromomyidae]
  • Paromomys depressidens, Gidley 1923 [Paromomyidae]
  • Paromomys maturus, Gidley 1923 [Paromomyidae]
  • Patriofelis, J. Leidy 1870 [Oxyaenidae]
  • Patriofelis ulta, Leidy 1870 [Oxyaenidae]
  • Pauromys exallos, Korth and Emry 1989 [Sciuravidae]
  • Pauromys simplex, Walton 1993 [Sciuravidae]
  • Pauromys texensis, Walton 1993 [Sciuravidae]
  • Pecari, Reichenbach 1835 [Tayassuidae]
  • Peratherium, Aymard 1850 [Mammalia]
  • Perchoerus, J. Leidy 1869 [Tayassuidae]
  • Perognathus, Maximillian 1839 [Heteromyidae]
  • Perognathus flavescens, Osgood 1900 [Heteromyidae]
  • Perognathus flavus, Baird 1855 [Heteromyidae]
  • Perognathus inornatus, Merriam 1889 [Heteromyidae]
  • Perognathus mclaughlini, Hibbard 1949 [Heteromyidae]
  • Perognathus merriami, Allen 1892 [Heteromyidae]
  • Perognathus trojectioansrum, Korth 1979 [Heteromyidae]
  • Peromyscus, Gloger 1841 [Cricetidae]
  • Peromyscus anyapahensis, J. White 1966 [Cricetidae]
  • Peromyscus cragini, Hibbard 1944 [Cricetidae]
  • Peromyscus cumberlandensis, Guilday and Handley 1967 [Cricetidae]
  • Peromyscus difficilis (Allen 1891) [Cricetidae]
  • Peromyscus imperfectus, Dice 1925 [Cricetidae]
  • Peromyscus pectoralis, Osgood 1904 [Cricetidae]
  • Petenyia, Kormos 1934 [Soricidae]
  • Phaiomys, Blyth 1863 [Cricetidae]
  • Phenacomys, Merriam 1889 [Cricetidae]
  • Phenacomys deeringensis (Guthrie and Matthews 1971) [Cricetidae]
  • Phenacomys gryci, Repenning 1987 [Cricetidae]
  • Phenacomys intermedius, Merriam 1889 [Cricetidae]
  • Phlaocyon, Matthew 1899 [Canidae]
  • Phlaocyon leucosteus, Matthew 1899 [Canidae]
  • Phoberocyon, Ginsburg 1955 [Ursidae]
  • Pipistrellus hesperus (H. Allen 1864) [Vespertilionidae]
  • Plagioctenodon, Bown 1979 [Nyctitheriidae]
  • Plagioctenodon krausae, Bown 1979 [Nyctitheriidae]
  • Plagioctenoides, Bown 1979 [Nyctitheriidae]
  • Plagioctenoides microlestes, Bown 1979 [Nyctitheriidae]
  • Platybelodon, Borissiak 1928 [Gomphotheriidae]
  • Plecotus townsendii, Cooper 1837 [Vespertilionidae]
  • Plesiadapis, Gervais 1877 [Plesiadapidae]
  • Plesictis, Pomel 1846 [Mustelidae]
  • Plesiogulo, Zdansky 1934 [Mustelidae]
  • Plesiosminthus, Viret 1926 [Zapodidae]
  • Plesiosorex, Pomel 1848 [Plesiosoricidae]
  • Plesiosorex coloradensis, R. Wilson 1960 [Plesiosoricidae]
  • Plesispermophilus, Filhol 1882 [Aplodontidae]
  • Pliolemmus, Hibbard 1937 [Cricetidae]
  • Plionarctos, Frick 1926 [Ursidae]
  • Plionarctos edensis, Frick 1926 [Ursidae]
  • Plithocyon, Ginsburg 1955 [Ursidae]
  • Potamotelses, Fox 1972 [Mammalia]
  • Potamotelses aquilensis, Fox 1972 [Mammalia]
  • Praeovibos, Staudinger 1908 [Bovidae]
  • Praeovibos priscus, Staudinger 1908 [Bovidae]
  • Pratilepus, Hibbard 1939 [Leporidae]
  • Pratilepus kansasensis, Hibbard 1939 [Leporidae]
  • Presbymys, R. Wilson 1949 [Protoptychidae]
  • Presbymys lophatus, R. Wilson 1949 [Protoptychidae]
  • Procadurcodon, Gromova 1960 [Amynodontidae]
  • Procaprolagus, A. A. Gureev 1960 [Leporidae]
  • Procyon, Storr 1780 [Procyonidae]
  • Proheteromys sulculus, R. Wilson 1960 [Heteromyidae]
  • Promioclaenus, Trouessart 1904 [Hyopsodontidae]
  • Promylagaulus, McGrew 1941 [Mylagaulidae]
  • Promylagaulus riggsi, McGrew 1941 [Mylagaulidae]
  • Pronothodectes, Gidley 1923 [Plesiadapidae]
  • Pronothodectes matthewi, Gidley 1923 [Plesiadapidae]
  • Proscalops secundus, W. D. Matthew 1909 [Proscalopidae]
  • Prosciurus albiclivus, Korth 1994 [Aplodontidae]
  • Prosigmodon holocuspis, Czaplewski 1987 [Cricetidae]
  • Protapirus, Filhol 1877 [Tapiridae]
  • Protemnocyon, Hatcher 1901 [Amphicyonidae]
  • Proterix, Matthew 1903 [Erinaceidae]
  • Proterix loomisi, Matthew 1903 [Erinaceidae]
  • Protoptychus, Scott 1895 [Protoptychidae]
  • Protoptychus hatcheri, Scott 1895 [Protoptychidae]
  • Protospermophilus, Gazin 1930 [Sciuridae]
  • Proviverra, Rütimeyer 1862 [Hyaenodonta]
  • Pseudaplodon occidentale, J. R. Macdonald 1956 [Aplodontidae]
  • Pseudocylindrodon, Burke 1935 [Cylindrodontidae]
  • Pseudocylindrodon medius, Burke 1938 [Cylindrodontidae]
  • Pseudocylindrodon neglectus, Burke 1935 [Cylindrodontidae]
  • Pseudocyon, Lartet 1851 [Amphicyonidae]
  • Pseudopalaeocastor, L. Martin 1987 [Castoridae]
  • Pseudotheridomys, Schlosser 1926 [Eomyidae]
  • Pseudotheridomys hesperus, R. Wilson 1960 [Eomyidae]
  • Pseudotrimylus, Gureev 1971 [Soricidae]
  • Psittacotherium, Cope 1882 [Mammalia]
  • Psittacotherium multifragum, Cope 1882 [Mammalia]
  • Pterodon, Blainville 1839 [Hyaenodonta]
  • Puma, Jardine 1834 [Felidae]
  • Putorius nigripes, Audubon and Bachman 1851 [Mustelidae]
  • Rangifer, Hamilton-Smith 1827 [Cervidae]
  • Reithrodontomys, Giglioli 1874 [Cricetidae]
  • Reithrodontomys fulvescens, Allen 1894 [Cricetidae]
  • Rhynchotherium, Falconer 1868 [Gomphotheriidae]
  • Saiga, Gray 1843 [Bovidae]
  • Saxonella, D. E. Russell 1964 [Saxonellidae]
  • Scalopoides, R.W. Wilson 1960 [Talpidae]
  • Scalopoides isodens, R. Wilson 1960 [Talpidae]
  • Scalopus, Geoffroy 1803 [Talpidae]
  • Scapanus, Pomel 1848 [Talpidae]
  • Scapanus orarius, True 1896 [Talpidae]
  • Scaphoceros tyrelli, Osgood 1905 [Bovidae]
  • Schistodelta sulcatus, Cope 1899 [Cricetidae]
  • Schizodontomys, Rensberger 1973 [Heteromyidae]
  • Schizodontomys greeni, Rensberger 1973 [Heteromyidae]
  • Schizodontomys sulcidens, Rensberger 1973 [Heteromyidae]
  • Schizotherium, Gervais 1876 [Chalicotheriidae]
  • Sciuravus bridgeri, R. Wilson 1938 [Sciuravidae]
  • Sciuravus eucristadens, Burke 1937 [Sciuravidae]
  • Sciuropterus, Cuvier 1825 [Sciuridae]
  • Sciurus aberti, Woodhouse 1853 [Sciuridae]
  • Sciurus alleni, Nelson 1898 [Sciuridae]
  • Sciurus arizonensis, Coues 1867 [Sciuridae]
  • Sciurus carolinensis, Gmelin 1788 [Sciuridae]
  • Sciurus griseus, Ord 1818 [Sciuridae]
  • Scottimus ambiguus, Korth 1981 [Cricetidae]
  • Scottimus kellamorum, Black 1961 [Cricetidae]
  • Scottimus longiquus, Korth 1981 [Cricetidae]
  • Scottimus viduus, Korth 1981 [Cricetidae]
  • Sigmodon, Say and Ord 1825 [Cricetidae]
  • Sigmodon bakeri, R. Martin 1974 [Cricetidae]
  • Sigmodon hispidus, Say and Ord 1825 [Cricetidae]
  • Sigmodon libitinus, R. Martin 1979 [Cricetidae]
  • Sigmodon ochrognathus, Bailey 1902 [Cricetidae]
  • Simimys, R. Wilson 1935 [Simimyidae]
  • Simocyon, Wagner 1858 [Ailuridae]
  • Simocyon primigenius, Wagner 1858 [Ailuridae]
  • Sinclairella, Jepsen 1934 [Apatemyidae]
  • Sinclairella dakotensis, Jepsen 1934 [Apatemyidae]
  • Sinclairia oregoniana, Ameghino 1912 [Megalonychidae]
  • Sinopa rapax, Leidy 1871 [Hyaenodontidae]
  • Smilodon, Lund 1841 [Felidae]
  • Soergelia, Schaub 1951 [Bovidae]
  • Sorex arcticus, Kerr 1792 [Soricidae]
  • Sorex arizonae, Diersing and Hoffmeister 1977 [Soricidae]
  • Sorex cinereus, Kerr 1792 [Soricidae]
  • Sorex cudahyensis, Hibbard 1944 [Soricidae]
  • Sorex dispar, Batchelder 1896 [Soricidae]
  • Sorex fumeus, Miller 1895 [Soricidae]
  • Sorex leahyi, Hibbard 1956 [Soricidae]
  • Sorex longirostris, Bachman 1837 [Soricidae]
  • Sorex merriami, Dobson 1890 [Soricidae]
  • Sorex monticolus, Merriam 1890 [Soricidae]
  • Sorex ornatus, Merriam 1895 [Soricidae]
  • Sorex palustris, Richardson 1828 [Soricidae]
  • Sorex rexroadensis, Hibbard 1953 [Soricidae]
  • Sorex sandersi, Hibbard 1956 [Soricidae]
  • Sorex saussurei, Merriam 1892 [Soricidae]
  • Sorex taylori, Hibbard 1937 [Soricidae]
  • Sorex trowbridgii, Baird 1858 [Soricidae]
  • Sorex vagrans, Baird 1858 [Soricidae]
  • Spermophilus, Cuvier 1825 [Sciuridae]
  • Spermophilus armatus, Kennicott 1863 [Sciuridae]
  • Spermophilus boothi, Hibbard 1972 [Sciuridae]
  • Spermophilus johnstoni, Hibbard 1972 [Sciuridae]
  • Spermophilus lorisrusselli, Hibbard 1976 [Sciuridae]
  • Spermophilus meltoni, Hibbard 1972 [Sciuridae]
  • Spermophilus spilosoma, Bennett 1833 [Sciuridae]
  • Spermophilus townsendii, Bachman 1839 [Sciuridae]
  • Spilogale, Gray 1865 [Mephitidae]
  • Stegomastodon, Pohlig 1912 [Gomphotheriidae]
  • Steneofiber, Geoffroy 1833 [Castoridae]
  • Stylinodon inexplicatus, R. M. Schoch and S. G. Lucas 1981 [Mammalia]
  • Sylvilagus, Gray 1867 [Leporidae]
  • Sylvilagus leonensis, Cushing 1945 [Leporidae]
  • Synaptomys, Baird 1858 [Cricetidae]
  • Synaptomys australis, G. G. Simpson 1928 [Cricetidae]
  • Synaptomys bunkeri, Hibbard 1939 [Cricetidae]
  • Synaptomys cooperi, Baird 1858 [Cricetidae]
  • Tadarida constantinei, Lawrence 1960 [Molossidae]
  • Taeniolabis, Cope 1882 [Taeniolabididae]
  • Tamias, Illinger 1811 [Sciuridae]
  • Tamias aristus, C. E. Ray 1965 [Sciuridae]
  • Tamiasciurus, Trouessart 1880 [Sciuridae]
  • Tapirus veroensis, Sellards 1918 [Tapiridae]
  • Tarka, McKenna 1990 [Omomyidae]
  • Tarka stylifera, McKenna 1990 [Omomyidae]
  • Tarkadectes montanensis, McKenna 1990 [Omomyidae]
  • Taxidea, Waterhouse 1839 [Mustelidae]
  • Taxymys progressus, R. Wilson 1938 [Sciuravidae]
  • Tayassu, Fischer 1814 [Tayassuidae]
  • Teleoceras felicis, Freudenberg 1921 [Rhinocerotidae]
  • Temnocyon ferox, Eyermann 1896 [Amphicyonidae]
  • Tenudomys, Rensberger 1973 [Geomyidae]
  • Tenudomys macdonaldi, Rensberger 1973 [Geomyidae]
  • Terricola, Fatio 1867 [Cricetidae]
  • Tetrapassalus proius, West 1973 [Epoicotheriidae]
  • Thinobadistes, Hay 1919 [Mylodontidae]
  • Thinobadistes segnis, Hay 1919 [Mylodontidae]
  • Thisbemys brevicrista, Ostrander 1986 [Ischyromyidae]
  • Thomomys, Wied-Neuwied 1839 [Geomyidae]
  • Thomomys orientalis, G. G. Simpson 1928 [Geomyidae]
  • Tisisthenes parvus, R. Martin 1973 [Mustelidae]
  • Tritemnodon, Matthew 1906 [Hyaenodontidae]
  • Trogosus, Leidy 1871 [Esthonychidae]
  • Tubulodon, Jepsen 1932 [Epoicotheriidae]
  • Tubulodon taylori, Jepsen 1932 [Epoicotheriidae]
  • Uintatherium, Leidy 1872 [Uintatheriidae]
  • Unuchinia, Simpson 1937 [Apatemyidae]
  • Urocyon, Baird 1857 [Canidae]
  • Ursavus, Schlosser 1899 [Ursidae]
  • Ursavus brevirhinus, Hofmann 1887 [Ursidae]
  • Ursavus pawniensis, Frick 1926 [Ursidae]
  • Ursavus primaevus, Gaillard 1899 [Ursidae]
  • Valenia, de Muizon and Cifelli 2000 [Hyopsodontidae]
  • Wilsoneumys, L. Martin 1980 [Cricetidae]
  • Yoderimys yarmeri, J. Wilson and Runkel 1991 [Eomyidae]
  • Ysengrinia, Ginsburg 1965 [Amphicyonidae]
  • Zanycteris, Matthew 1917 [Picrodontidae]
  • Zanycteris paleocenus, W. D. Matthew 1917 [Picrodontidae]
  • Zapus, Coues 1876 [Zapodidae]
  • Zapus princeps, Allen 1893 [Zapodidae]
  • Zapus rinkeri, Hibbard 1951 [Zapodidae]
  • Zapus sandersi, Hibbard 1956 [Zapodidae]