Opinions from B. Kurten and E. Anderson 1980
- 'Acinonyx belongs to Felinae'
- 'Aenocyon is a subjective synonym of Canis'
- 'Afropterus belongs to Microchiroptera'
- 'Aftonius calvini is a subjective synonym of Euceratherium collinum'
- 'Ageina belongs to Natalidae'
- 'Ailuraena is a subjective synonym of Chasmaporthetes'
- 'Ailuraena is a subjective synonym of Chasmaporthetes' according to Stirton and Christian 1941
- 'Ailuraena johnstoni is a subjective synonym of Chasmaporthetes ossifragus'
- 'Ailurina was reranked as the subfamily Ailurinae and belongs to Procyonidae'
- 'Ailurinae belongs to Procyonidae'
- 'Ailurus anglicus is recombined as Parailurus anglicus'
- 'Alces belongs to Odocoileinae'
- 'Alces brevitrabalis is recombined as Cervus brevitrabalis'
- 'Alces brevitrabalis belongs to Alces' according to Cope 1889
- 'Alces runnymedensis is a subjective synonym of Alces alces'
- 'Alces runnymedensis belongs to Alces' according to Hay 1923
- 'Alces semipalmatus is a subjective synonym of Cervus brevitrabalis'
- 'Alces semipalmatus belongs to Alces' according to Cope 1889
- 'Alces shimeki is a nomen dubium'
- 'Alces shimeki belongs to Alces' according to Hay 1914
- 'Alilepus vagus is recombined as Pratilepus vagus'
- 'Allophaiomys is a subjective synonym of Microtus'
- 'Allophaiomys is a subjective synonym of Microtus' according to van der Meulen 1973
- 'Allophaiomys pliocaenicus is recombined as Microtus pliocaenicus'
- 'Allophaiomys pliocaenicus is recombined as Microtus pliocaenicus' according to van der Meulen 1973
- 'Alopex belongs to Canidae'
- 'Aluralagus belongs to Leporinae'
- 'Ammospermophilus belongs to Sciuridae'
- 'Anancus bensonensis is a subjective synonym of Stegomastodon mirificus'
- 'Anancus bensonensis is recombined as Cordillerion bensonensis' according to Osborn 1942
- 'Anancus bensonensis belongs to Anancus' according to Gidley 1926
- 'Anaptogonia is a subjective synonym of Ondatra'
- 'Anaptogonia cloacina is a subjective synonym of Ondatra hiatidens'
- 'Anisonyx rufa is recombined as Aplodontia rufa'
- 'Anisonyx rufa belongs to Anisonyx' according to Rafinesque 1817
- 'Antilocapra belongs to Antilocapridae'
- 'Antilocapridae belongs to Artiodactyla'
- 'Antilope americana is recombined as Antilocapra americana'
- 'Antilope americana is recombined as Antilocapra americana' according to Ord 1818
- 'Antilope americana belongs to Antilope' according to Ord 1815
- 'Antrozous belongs to Vespertilionae'
- 'Anzanycteris belongs to Nyctophylinae'
- 'Anzanycteris anzensis belongs to Anzanycteris'
- 'Aplodontia belongs to Aplodontidae'
- 'Aplodontidae belongs to Rodentia'
- 'Archaeolaginae belongs to Leporidae'
- 'Archaeonycterididae belongs to Icaronycteroidea'
- 'Archaeonycteris belongs to Archaeonycterididae'
- 'Archidiskodon is a subjective synonym of Mammuthus'
- 'Archidiskodon haroldcooki belongs to Archidiskodon' according to Hay 1928
- 'Archidiskodon haroldcooki is a subjective synonym of Mammuthus meridionalis'
- 'Archidiskodon hayi is a subjective synonym of Mammuthus meridionalis'
- 'Archidiskodon hayi belongs to Archidiskodon' according to Barbour 1915
- 'Archidiskodon nebrascensis is a subjective synonym of Mammuthus meridionalis'
- 'Archidiskodon nebrascensis belongs to Archidiskodon' according to Osborn 1932
- 'Archidiskodon scotti is a subjective synonym of Mammuthus meridionalis'
- 'Archidiskodon sonoriensis is a subjective synonym of Mammuthus columbi'
- 'Arctodus belongs to Tremarctinae'
- 'Arctodus floridanus is recombined as Tremarctos floridanus'
- 'Arctodus pristinus belongs to Arctodus'
- 'Arctomys beecheyi is recombined as Spermophilus beecheyi'
- 'Arctomys columbianus is recombined as Spermophilus columbianus'
- 'Arctomys columbianus belongs to Arctomys' according to Ord 1815
- 'Arctomys flaviventer belongs to Arctomys' according to Audubon and Bachman 1841
- 'Arctomys flaviventer is recombined as Marmota flaviventris'
- 'Arctomys flaviventer is recombined as Marmota flaviventris' according to Warren 1934
- 'Arctomys flaviventer is recombined as Marmota flaviventris' according to Grinnell 1921
- 'Arctomys flaviventer is recombined as Marmota flaviventris' according to Howell 1915
- 'Arctomys flaviventer is recombined as Marmota flaviventris' according to Figgins 1915
- 'Arctomys flaviventer is recombined as Marmota flaviventris' according to Howell 1914
- 'Arctomys flaviventer is recombined as Marmota flaviventris' according to Trouessart 1904
- 'Arctomys franklinii is recombined as Spermophilus franklinii'
- 'Arctomys franklinii belongs to Arctomys' according to Sabine 1822
- 'Arctomys ludoviciana is recombined as Cynomys ludovicianus'
- 'Arctomys parryii is recombined as Spermophilus parryii'
- 'Arctomys parryii is recombined as Spermophilus parryii' according to Nadler et al. 1974
- 'Arctomys parryii is recombined as Spermophilus parryii' according to Gromov et al. 1965
- 'Arctomys parryii is a subjective synonym of Spermophilus undulatus' according to Hall and Kelson 1959
- 'Arctomys parryii is a subjective synonym of Spermophilus undulatus' according to Ellerman and Morrison-Scott 1951
- 'Arctomys parryii belongs to Arctomys' according to Richardson 1825
- 'Arctomys richardsonii is recombined as Spermophilus richardsonii'
- 'Arctotherium californicum is a subjective synonym of Arctodus simus'
- 'Arctotherium californicum is a subjective synonym of Arctodus simus' according to Kurten 1967
- 'Arctotherium simum is recombined as Arctodus simus'
- 'Arctotherium simum is recombined as Arctodus simus' according to Kurten 1967
- 'Arctotherium simum is recombined as Tremarctotherium simum' according to Rinker 1949
- 'Arctotherium yukonense is a subjective synonym of Arctodus simus'
- 'Arctotherium yukonense is a subjective synonym of Arctodus simus' according to Kurten 1967
- 'Arvicola borealis is recombined as Synaptomys borealis'
- 'Arvicola borealis is recombined as Synaptomys borealis' according to Osgood 1907
- 'Arvicola borealis belongs to Arvicola' according to Richardson 1828
- 'Arvicola californica is recombined as Microtus californicus' according to Bailey 1900
- 'Arvicola californica is recombined as Microtus californicus' according to Bailey 1898
- 'Arvicola californica is recombined as Microtus californicus' according to Trouessart 1897
- 'Arvicola californica belongs to Arvicola' according to Peale 1848
- 'Arvicola californica is recombined as Microtus californicus'
- 'Arvicola californica is recombined as Microtus californicus' according to Thaeler 1961
- 'Arvicola californica is recombined as Microtus californicus' according to von Bloeker 1937
- 'Arvicola californica is recombined as Microtus californicus' according to Hatfield 1935
- 'Arvicola californica is recombined as Microtus californicus' according to von Bloeker 1932
- 'Arvicola californica is recombined as Microtus californicus' according to Huey 1931
- 'Arvicola californica is recombined as Microtus californicus' according to Osgood 1928
- 'Arvicola californica is recombined as Microtus californicus' according to Grinnell 1926
- 'Arvicola californica is recombined as Microtus californicus' according to R. Kellogg 1922
- 'Arvicola californica is recombined as Microtus californicus' according to R. Kellogg 1918
- 'Arvicola californica is recombined as Microtus californicus' according to Elliot 1903
- 'Arvicola chrotorrhinus is recombined as Microtus chrotorrhinus'
- 'Arvicola chrotorrhinus is recombined as Microtus chrotorrhinus' according to Komarek 1932
- 'Arvicola chrotorrhinus is recombined as Microtus chrotorrhinus' according to Bangs 1898
- 'Arvicola chrotorrhinus is recombined as Microtus chrotorrhinus' according to Bangs 1896
- 'Arvicola chrotorrhinus belongs to Arvicola' according to G. Miller 1894
- 'Arvicola curtata belongs to Arvicola' according to Cope 1868
- 'Arvicola curtata is recombined as Lagurus curtatus'
- 'Arvicola curtata is recombined as Lagurus curtatus' according to Dearden and Lee 1955
- 'Arvicola curtata is recombined as Lagurus curtatus' according to Hall and Cockrum 1953
- 'Arvicola curtata is recombined as Lagurus curtatus' according to Kelson 1951
- 'Arvicola curtata is recombined as Lagurus curtatus' according to Hall 1946
- 'Arvicola curtata is recombined as Lagurus curtatus' according to Borell and Ellis 1934
- 'Arvicola curtata is recombined as Lagurus curtatus' according to Thomas 1912
- 'Arvicola didelta is a subjective synonym of Microtus guildayi'
- 'Arvicola gapperi is recombined as Clethrionomys gapperi' according to Racey and Cowan 1935
- 'Arvicola gapperi is recombined as Clethrionomys gapperi' according to Whitlow and Hall 1933
- 'Arvicola gapperi is recombined as Clethrionomys gapperi'
- 'Arvicola gapperi is recombined as Clethrionomys gapperi' according to Hall and Cockrum 1952
- 'Arvicola gapperi is recombined as Clethrionomys gapperi' according to Hall and Cockrum 1952
- 'Arvicola gapperi is recombined as Clethrionomys gapperi' according to Cockrum and Fitch 1952
- 'Arvicola gapperi is recombined as Clethrionomys gapperi' according to Poole 1949
- 'Arvicola gapperi is recombined as Clethrionomys gapperi' according to Booth 1945
- 'Arvicola gapperi is recombined as Clethrionomys gapperi' according to R. Anderson 1943
- 'Arvicola gapperi is recombined as Clethrionomys gapperi' according to Bole and Moulthrop 1942
- 'Arvicola gapperi is recombined as Clethrionomys gapperi' according to Doutt 1941
- 'Arvicola gapperi is recombined as Clethrionomys gapperi' according to R. Smith 1940
- 'Arvicola gapperi is recombined as Clethrionomys gapperi' according to R. Smith 1940
- 'Arvicola gapperi is recombined as Clethrionomys gapperi' according to R. Anderson 1940
- 'Arvicola gapperi is recombined as Clethrionomys gapperi' according to R. Kellogg 1939
- 'Arvicola gapperi is recombined as Clethrionomys gapperi' according to C. Jackson 1938
- 'Arvicola hiatidens is recombined as Ondatra hiatidens'
- 'Arvicola involuta is a subjective synonym of Microtus guildayi'
- 'Arvicola longicaudus is recombined as Microtus longicaudus'
- 'Arvicola longicaudus is recombined as Microtus longicaudus' according to Lee and Durrant 1960
- 'Arvicola longicaudus is recombined as Microtus longicaudus' according to Dalquest 1948
- 'Arvicola longicaudus is recombined as Microtus longicaudus' according to R. Anderson and Rand 1944
- 'Arvicola longicaudus is recombined as Microtus longicaudus' according to Goldman 1938
- 'Arvicola longicaudus is recombined as Microtus longicaudus' according to J. Allen 1895
- 'Arvicola longicaudus belongs to Arvicola' according to Merriam 1888
- 'Arvicola mexicana is recombined as Microtus mexicanus' according to Bailey 1932
- 'Arvicola mexicana is recombined as Microtus mexicanus' according to Bailey 1902
- 'Arvicola mexicana is recombined as Microtus mexicanus' according to Bailey 1900
- 'Arvicola mexicana is recombined as Microtus mexicanus' according to C. Merriam 1898
- 'Arvicola mexicana is recombined as Microtus mexicanus' according to Trouessart 1897
- 'Arvicola mexicana belongs to Arvicola' according to Saussure 1861
- 'Arvicola mexicana is recombined as Microtus mexicanus'
- 'Arvicola mexicana is recombined as Microtus mexicanus' according to Hooper 1955
- 'Arvicola mexicana is recombined as Microtus mexicanus' according to Hall 1948
- 'Arvicola mexicana is recombined as Microtus mexicanus' according to Goldman 1938
- 'Arvicola mexicana is recombined as Microtus mexicanus' according to Benson 1934
- 'Arvicola montana is recombined as Microtus montanus' according to Bailey 1898
- 'Arvicola montana is recombined as Microtus montanus' according to Trouessart 1897
- 'Arvicola montana belongs to Arvicola' according to Peale 1848
- 'Arvicola montana is recombined as Microtus montanus'
- 'Arvicola montana is recombined as Microtus montanus' according to S. Anderson 1954
- 'Arvicola montana is recombined as Microtus montanus' according to Hall and Kelson 1951
- 'Arvicola montana is recombined as Microtus montanus' according to Hall and Hayward 1941
- 'Arvicola montana is recombined as Microtus montanus' according to Hall 1938
- 'Arvicola montana is recombined as Microtus montanus' according to Hall 1935
- 'Arvicola montana is recombined as Microtus montanus' according to Bailey 1917
- 'Arvicola montana is recombined as Microtus montanus' according to Grinnell 1914
- 'Arvicola montana is recombined as Microtus montanus' according to Grinnell 1913
- 'Arvicola montana is recombined as Microtus montanus' according to Bailey 1900
- 'Arvicola nuttalli is recombined as Ochrotomys nuttalli'
- 'Arvicola nuttalli is recombined as Ochrotomys nuttalli' according to Packard 1969
- 'Arvicola nuttalli is recombined as Ochrotomys nuttalli' according to Rippy and Harvey 1963
- 'Arvicola nuttalli is recombined as Ochrotomys nuttalli' according to McCarley 1959
- 'Arvicola nuttalli is recombined as Ochrotomys nuttalli' according to Hooper 1958
- 'Arvicola sigmodus is a subjective synonym of Microtus guildayi'
- 'Arvicola sigmodus is a subjective synonym of Pedomys dideltus' according to Hibbard 1955
- 'Arvicola sigmodus is a subjective synonym of Microtus dideltus' according to Cope 1899
- 'Arvicola sigmodus belongs to Arvicola' according to Cope 1871
- 'Arvicola speothen is a subjective synonym of Microtus guildayi'
- 'Arvicola tetradelta belongs to Arvicola' according to Cope 1871
- 'Arvicola tetradelta is a subjective synonym of Microtus guildayi'
- 'Arvicola tetradelta is a subjective synonym of Microtus speothen' according to Hibbard 1955
- 'Arvicola tetradelta is a subjective synonym of Microtus speothen' according to Cope 1899
- 'Arvicola xanthognatha is recombined as Microtus xanthognathus'
- 'Arvicola xanthognatha is recombined as Microtus xanthognathus' according to G. Miller 1894
- 'Arvicola xanthognatha belongs to Arvicola' according to Leach 1815
- 'Asellia belongs to Hipposideridae'
- 'Asinus aguascalentensis is a subjective synonym of Equus excelsus'
- 'Atopomys belongs to Microtinae'
- 'Atopomys salvelinus belongs to Atopomys'
- 'Atopomys texensis belongs to Atopomys'
- 'Auchenia hesterna is recombined as Camelops hesternus'
- 'Auchenia huerfanensis is recombined as Camelops huerfanensis'
- 'Baiomys belongs to Cricetinae'
- 'Baiomys aquilonius belongs to Baiomys'
- 'Baiomys kolbi belongs to Baiomys'
- 'Baiomys rexroadensis belongs to Baiomys' according to Hibbard 1941
- 'Baiomys rexroadensis belongs to Baiomys'
- 'Barbastella belongs to Vespertilionidae'
- 'Bassaris is replaced by Bassariscus'
- 'Bassaris astutus is recombined as Bassariscus astutus'
- 'Bassaris astutus belongs to Bassaris' according to Lichtenstein 1830
- 'Bassariscus belongs to Procyoninae'
- 'Bassariscus casei belongs to Bassariscus'
- 'Bassariscus sonoitensis belongs to Bassariscus'
- 'Bensonomys belongs to Cricetinae'
- 'Bensonomys meadensis belongs to Bensonomys'
- 'Bison belongs to Bovinae'
- 'Bison aguascalentensis is a subjective synonym of Bison latifrons'
- 'Bison alaskensis is a subjective synonym of Bison priscus'
- 'Bison alleni is a subjective synonym of Bison latifrons'
- 'Bison angularis is a subjective synonym of Bison latifrons'
- 'Bison angularis belongs to Bison' according to Figgins 1933
- 'Bison antiquus is a subjective synonym of Bison bison'
- 'Bison appalachicolus is a subjective synonym of Symbos cavifrons'
- 'Bison californicus is a subjective synonym of Bison bison'
- 'Bison californicus belongs to Bison' according to Rhoads 1897
- 'Bison chaneyi is a subjective synonym of Bison latifrons'
- 'Bison crassicornis is a subjective synonym of Bison priscus'
- 'Bison crassicornis is a subjective synonym of Bison priscus' according to Guthrie 1970
- 'Bison ferox is a subjective synonym of Bison latifrons'
- 'Bison figginsi is a subjective synonym of Bison bison'
- 'Bison geisti is a subjective synonym of Bison priscus'
- 'Bison geisti belongs to Bison' according to Skinner and Kaisen 1947
- 'Bison kansensis is a subjective synonym of Bison bison'
- 'Bison occidentalis is a subjective synonym of Bison bison'
- 'Bison occidentalis is a subjective synonym of Bison bison' according to Fuller and Bayrock 1965
- 'Bison oliverhayi is a subjective synonym of Bison bison'
- 'Bison oliverhayi belongs to Bison' according to Figgins 1933
- 'Bison pacificus belongs to Bison' according to Hay 1927
- 'Bison pacificus is a subjective synonym of Bison bison'
- 'Bison praeoccidentalis is a subjective synonym of Bison priscus'
- 'Bison praeoccidentalis belongs to Bison' according to Skinner and Kaisen 1947
- 'Bison regius is a subjective synonym of Bison latifrons'
- 'Bison regius belongs to Bison' according to Hay 1913
- 'Bison rotundus is a subjective synonym of Bison latifrons'
- 'Bison rotundus belongs to Bison' according to Figgins 1933
- 'Bison taylori is a subjective synonym of Bison bison'
- 'Bison texanus is a subjective synonym of Bison bison'
- 'Bison texanus belongs to Bison' according to Hay and Cook 1928
- 'Bison willistoni is a subjective synonym of Bison latifrons'
- 'Bison willistoni belongs to Bison' according to Martin 1924
- 'Blancocamelus belongs to Camelidae'
- 'Blancocamelus meadei belongs to Blancocamelus'
- 'Blarina belongs to Soricidae'
- 'Blarina adamsi is recombined as Cryptotis adamsi'
- 'Blarina adamsi is recombined as Cryptotis adamsi' according to Choate 1970
- 'Blarina fossilis is a subjective synonym of Blarina brevicauda' according to Hibbard 1957
- 'Blarina fossilis belongs to Blarina' according to Hibbard 1943
- 'Blarina fossilis is a subjective synonym of Blarina brevicauda'
- 'Blarina fossilis is a subjective synonym of Blarina brevicauda' according to Graham and Semken 1976
- 'Blarina gidleyi is recombined as Paracryptotis gidleyi'
- 'Blarina mexicana is recombined as Cryptotis mexicana'
- 'Blarina ozarkensis belongs to Blarina'
- 'Blarina ozarkensis belongs to Blarina' according to Graham and Semken 1976
- 'Blarina ozarkensis belongs to Blarina' according to Brown 1908
- 'Blarina simplicidens is a subjective synonym of Blarina brevicauda'
- 'Blarina simplicidens is a subjective synonym of Blarina brevicauda' according to Hibbard 1957
- 'Blarina simplicidens belongs to Blarina' according to Cope 1899
- 'Blastocerus belongs to Odocoileinae'
- 'Blastocerus extraneus belongs to Blastocerus'
- 'Bootherium belongs to Caprinae'
- 'Bootherium brazosis is a subjective synonym of Symbos cavifrons'
- 'Bootherium brazosis belongs to Bootherium' according to Hesse 1942
- 'Bootherium nivicolens is a subjective synonym of Symbos cavifrons'
- 'Bootherium sargenti is a subjective synonym of Symbos cavifrons'
- 'Boreostracon is a subjective synonym of Glyptotherium'
- 'Boreostracon floridanus is recombined as Glyptotherium floridanum'
- 'Borophagus belongs to Simocyoninae'
- 'Borophagus diversidens belongs to Borophagus'
- 'Bos belongs to Bovinae'
- 'Bos arizonica is a subjective synonym of Bison latifrons'
- 'Bos arizonica is a subjective synonym of Bison latifrons' according to F. Lucas 1899
- 'Bos bison is recombined as Bison bison'
- 'Bos bison belongs to Bos' according to Linnaeus 1758
- 'Bos bombifrons is recombined as Bootherium bombifrons'
- 'Bos bunnelli is a subjective synonym of Bos grunniens'
- 'Bos crampianus is a subjective synonym of Bison latifrons'
- 'Bos grunniens belongs to Bos'
- 'Bos latifrons is recombined as Bison latifrons'
- 'Bos latifrons is recombined as Bison latifrons' according to Skinner and Kaisen 1947
- 'Bos moschatus is recombined as Ovibos moschatus'
- 'Bovidae belongs to Artiodactyla'
- 'Bovina is corrected as Bovinae and belongs to Bovidae'
- 'Brachylagus belongs to Leporinae'
- 'Brachylagus belongs to Leporidae' according to Kenner 1965
- 'Brachylagus browni is recombined as Hypolagus browni'
- 'Brachyprotoma belongs to Mephitinae'
- 'Brachyprotoma breviramus is recombined as Buisnictis breviramus'
- 'Brachyprotoma pristina is a subjective synonym of Brachyprotoma obtusata'
- 'Brachyprotoma spelaea is a subjective synonym of Brachyprotoma obtusata'
- 'Breameryx is a subjective synonym of Capromeryx'
- 'Bretzia belongs to Cervidae'
- 'Bretzia pseudalces belongs to Bretzia'
- 'Buisnictis belongs to Mephitinae'
- 'Buisnictis burrowsi belongs to Buisnictis'
- 'Buisnictis meadensis is a subjective synonym of Buisnictis breviramus'
- 'Burosor efforsorius is a subjective synonym of Castoroides ohioensis'
- 'Callorhinus belongs to Otariidae'
- 'Camelidae belongs to Artiodactyla'
- 'Camelops belongs to Camelidae'
- 'Camelops kansanus belongs to Camelops'
- 'Camelops minidokae belongs to Camelops'
- 'Camelops traviswhitei belongs to Camelops'
- 'Camelus americanus is a subjective synonym of Hemiauchenia macrocephala'
- 'Canidae belongs to Fissipedia'
- 'Canimartes belongs to Grisoninae'
- 'Canimartes cumminsii [misspelled as Canimartes cumminsi] belongs to Canimartes'
- 'Caninae belongs to Canidae'
- 'Canis belongs to Canidae'
- 'Canis alpinus is recombined as Cuon alpinus'
- 'Canis alpinus belongs to Canis' according to Pallas 1811
- 'Canis andersoni is a subjective synonym of Canis latrans'
- 'Canis armbrusteri belongs to Canis'
- 'Canis arnensis belongs to Canis' according to Del Campana 1913
- 'Canis arnensis is a subjective synonym of Canis lepophagus'
- 'Canis ayersi is a subjective synonym of Canis dirus'
- 'Canis caneloensis is a subjective synonym of Canis latrans'
- 'Canis cedazoensis belongs to Canis'
- 'Canis cinereoargenteus is recombined as Urocyon cinereoargenteus'
- 'Canis cinereoargenteus belongs to Canis' according to Schreber 1775
- 'Canis dirus belongs to Canis'
- 'Canis edwardii is a subjective synonym of Canis priscolatrans'
- 'Canis familiaris belongs to Canis'
- 'Canis indianensis is a subjective synonym of Canis dirus'
- 'Canis irvingtonensis is a subjective synonym of Canis latrans'
- 'Canis lagopus is recombined as Alopex lagopus'
- 'Canis latrans belongs to Canis'
- 'Canis lepophagus belongs to Canis'
- 'Canis lupus belongs to Canis'
- 'Canis milleri is a subjective synonym of Canis lupus'
- 'Canis mississippiensis is a subjective synonym of Canis dirus'
- 'Canis orcutti is a subjective synonym of Canis latrans'
- 'Canis priscolatrans belongs to Canis'
- 'Canis priscolatrans belongs to Canis' according to Cope 1899
- 'Canis riviveronis is a subjective synonym of Canis latrans'
- 'Canis rufus belongs to Canis'
- 'Canis texanus is recombined as Protocyon texanus'
- 'Canis velox is recombined as Vulpes velox'
- 'Canis velox is recombined as Vulpes velox' according to Bueler 1973
- 'Canis velox belongs to Canis' according to Say 1823
- 'Canis vulpes is recombined as Vulpes vulpes'
- 'Canis vulpes is recombined as Vulpes vulpes' according to Churcher 1959
- 'Capra belongs to Caprinae'
- 'Capra tatarica is recombined as Saiga tatarica'
- 'Caprinae belongs to Bovidae'
- 'Capromeryx belongs to Antilocapridae'
- 'Capromeryx arizonensis belongs to Capromeryx'
- 'Capromeryx furcifer belongs to Capromeryx'
- 'Capromeryx gidleyi belongs to Capromeryx'
- 'Capromeryx mexicana belongs to Capromeryx'
- 'Capromeryx minimus is a subjective synonym of Capromeryx furcifer'
- 'Capromeryx minor belongs to Capromeryx'
- 'Cardioderma belongs to Megadermatidae'
- 'Cariacus ensifer is a subjective synonym of Odocoileus hemionus'
- 'Castor belongs to Castoridae'
- 'Castor accessor belongs to Castor'
- 'Castor californicus belongs to Castor'
- 'Castor canadensis belongs to Castor'
- 'Castor zibethicus is recombined as Ondatra zibethicus'
- 'Castor zibethicus is recombined as Fiber zibethicus' according to Hollister 1911
- 'Castor zibethicus belongs to Castor' according to Linnaeus 1766
- 'Castoridae belongs to Rodentia'
- 'Castoroides belongs to Castoridae'
- 'Castoroides nebrascensis is a subjective synonym of Castoroides ohioensis'
- 'Castoroides nebrascensis belongs to Castoroides' according to Barbour 1931
- 'Castoroides ohioensis belongs to Castoroides'
- 'Cecilionycteris belongs to Archaeonycterididae'
- 'Ceratomeryx belongs to Antilocapridae'
- 'Ceratomeryx prenticei belongs to Ceratomeryx'
- 'Cervalces belongs to Odocoileinae'
- 'Cervalces alaskensis is a subjective synonym of Alces latifrons'
- 'Cervalces alaskensis is a subjective synonym of Alces latifrons' according to Harington 1977
- 'Cervalces alaskensis is a subjective synonym of Cervalces scotti' according to Churcher and Pinsof 1988
- 'Cervalces borealis is a subjective synonym of Cervalces scotti'
- 'Cervalces borealis belongs to Cervalces' according to Bensley 1913
- 'Cervalces roosevelti is a subjective synonym of Cervalces scotti'
- 'Cervalces roosevelti belongs to Cervalces' according to Hay 1913
- 'Cervidae belongs to Artiodactyla'
- 'Cervinae belongs to Cervidae'
- 'Cervus belongs to Cervinae'
- 'Cervus aguangae is a nomen dubium'
- 'Cervus alces is recombined as Alces alces'
- 'Cervus alces is recombined as Alces alces' according to Peterson 1955
- 'Cervus alces belongs to Cervus' according to Linnaeus 1758
- 'Cervus elaphus belongs to Cervus'
- 'Cervus fortisi is a nomen dubium'
- 'Cervus fortisi belongs to Cervus' according to Cope 1878
- 'Cervus hemionus is recombined as Odocoileus hemionus'
- 'Cervus hemionus belongs to Cervus' according to Rafinesque 1817
- 'Cervus lascrucensis is a subjective synonym of Navahoceros fricki'
- 'Cervus latifrons is recombined as Libralces latifrons' according to Azzaroli 1952
- 'Cervus latifrons belongs to Cervus' according to Johnson 1874
- 'Cervus latifrons is recombined as Alces latifrons'
- 'Cervus latifrons is recombined as Alces latifrons' according to Kahlke 1969
- 'Cervus latifrons is recombined as Alces latifrons' according to Kahlke 1965
- 'Cervus latifrons is recombined as Alces latifrons' according to Kahlke 1960
- 'Cervus latifrons is recombined as Alces latifrons' according to Kahlke 1956
- 'Cervus latifrons is recombined as Alces latifrons' according to Reynolds 1934
- 'Cervus latifrons is recombined as Alces latifrons' according to Dawkins 1887
- 'Cervus lucasi is a nomen dubium'
- 'Cervus scotti is recombined as Cervalces scotti'
- 'Cervus scotti is recombined as Cervalces scotti' according to Azzaroli 1952
- 'Cervus tarandus is recombined as Rangifer tarandus'
- 'Cervus tarandus belongs to Cervus' according to Linnaeus 1758
- 'Cervus whitneyi is a subjective synonym of Sangamona fugitiva'
- 'Chamtwaria belongs to Vespertilionidae'
- 'Chasmaporthetes belongs to Hyaenidae'
- 'Chasmaporthetes ossifragus belongs to Chasmaporthetes'
- 'Citellus bensoni is recombined as Spermophilus bensoni'
- 'Citellus cochisei is recombined as Spermophilus cochisei'
- 'Citellus cragini is recombined as Spermophilus cragini'
- 'Citellus finlayensis is recombined as Spermophilus finlayensis'
- 'Citellus howelli is recombined as Spermophilus howelli'
- 'Citellus mcgheei [misspelled as Spermophilus magheei] belongs to Spermophilus'
- 'Citellus meadensis is recombined as Spermophilus meadensis'
- 'Citellus rexroadensis is recombined as Spermophilus rexroadensis' according to Hemming 1956
- 'Citellus rexroadensis is recombined as Spermophilus rexroadensis'
- 'Citellus taylori is recombined as Spermophilus taylori'
- 'Citellus taylori is recombined as Spermophilus taylori' according to Hemming 1956
- 'Citellus tuitus is recombined as Spermophilus tuitus'
- 'Citellus tuitus is recombined as Spermophilus tuitus' according to Hemming 1956
- 'Clethrionomys belongs to Microtinae'
- 'Coendou belongs to Erethizontidae'
- 'Coendou cumberlandicus belongs to Coendou'
- 'Coendou stirtoni belongs to Coendou'
- 'Condylura belongs to Talpidae'
- 'Conepatus belongs to Mephitinae'
- 'Corynorhinus alleganiensis is recombined as Plecotus alleganiensis'
- 'Corynorhinus alleganiensis is recombined as Plecotus alleganiensis' according to R. Martin 1972
- 'Corynorhinus tetralophodon is recombined as Plecotus tetralophodon'
- 'Corynorhinus tetralophodon is recombined as Plecotus tetralophodon' according to R. Martin 1972
- 'Corynorhinus tetralophodon belongs to Corynorhinus' according to Handley 1955
- 'Cosomys belongs to Microtinae'
- 'Cosomys primus belongs to Cosomys'
- 'Cratogeomys belongs to Geomyidae'
- 'Cratogeomys bensoni belongs to Cratogeomys'
- 'Cricetidae belongs to Rodentia'
- 'Cricetinae belongs to Cricetidae'
- 'Cricetodipus parvus is recombined as Perognathus parvus'
- 'Cricetodipus parvus belongs to Cricetodipus' according to Peale 1848
- 'Cricetus talpoides is recombined as Thomomys talpoides'
- 'Cricetus talpoides belongs to Cricetus' according to Richardson 1828
- 'Crocuta inexpectata is a subjective synonym of Acinonyx studeri'
- 'Crocuta inexpectata is a nomen dubium' according to Adams 1979
- 'Cryptopterus belongs to Sciuridae'
- 'Cryptopterus webbi belongs to Cryptopterus'
- 'Cryptotis belongs to Soricidae'
- 'Cryptotis meadensis belongs to Cryptotis'
- 'Cudahyomys moorei is recombined as Reithrodontomys moorei'
- 'Cudahyomys moorei belongs to Cudahyomys' according to Hibbard 1944
- 'Cuon belongs to Canidae'
- 'Cuvieronius belongs to Gomphotheriidae'
- 'Cynomys belongs to Sciuridae'
- 'Cynomys hibbardi belongs to Cynomys'
- 'Cynomys leucurus belongs to Cynomys'
- 'Cynomys meadensis is a subjective synonym of Cynomys ludovicianus'
- 'Cynomys meadensis belongs to Cynomys' according to Hibbard 1956
- 'Cynomys niobrarius belongs to Cynomys'
- 'Cynomys vetus belongs to Cynomys'
- 'Cystophora belongs to Monachinae'
- 'Dama virginiana is recombined as Odocoileus virginianus'
- 'Dasipidae is corrected as Dasypodidae and belongs to Edentata'
- 'Dasypodinae belongs to Dasypodidae'
- 'Dasypterus belongs to Vespertilionae'
- 'Dasypterus floridanus is a subjective synonym of Lasiurus intermedius'
- 'Dasypterus floridanus is a subjective synonym of Lasiurus intermedius' according to R. Martin 1972
- 'Dasypterus floridanus belongs to Dasypterus' according to Miller 1902
- 'Dasypterus golliheri is recombined as Lasiurus golliheri'
- 'Dasypterus golliheri is recombined as Lasiurus golliheri' according to R. Martin 1972
- 'Dasypus belongs to Dasypodinae'
- 'Dasypus novemcinctus belongs to Dasypus'
- 'Desmodontidae was reranked as the subfamily Desmodontinae and belongs to Phyllostomatidae'
- 'Desmodus belongs to Desmodontinae'
- 'Desmodus magnus is a subjective synonym of Desmodus stocki'
- 'Desmodus magnus is a subjective synonym of Desmodus stocki' according to R. Martin 1972
- 'Desmodus magnus belongs to Desmodus' according to Gut 1959
- 'Desmodus stocki belongs to Desmodus'
- 'Dibelodon praecursor is recombined as Serbelodon praecursor' according to Osborn 1936
- 'Dibelodon praecursor is recombined as Serridentinus praecursor' according to Osborn 1935
- 'Dibelodon praecursor is recombined as Rhynchotherium praecursor'
- 'Dicea lepuscula is recombined as Notolagus lepusculus'
- 'Dicotyles fossilis is a subjective synonym of Mylohyus nasutus'
- 'Dicotyles nasutus is recombined as Mylohyus nasutus'
- 'Dicotyles pennsylvanicus is a subjective synonym of Mylohyus nasutus'
- 'Dicrostonyx belongs to Microtinae'
- 'Didelphidae belongs to Marsupialia'
- 'Didelphis belongs to Didelphidae'
- 'Didelphis virginiana belongs to Didelphis'
- 'Dinarctotherium merriami is a subjective synonym of Arctodus simus'
- 'Dinobastis is a subjective synonym of Homotherium'
- 'Dinobastis serus is recombined as Homotherium serum'
- 'Dinofelis belongs to Machairodontinae'
- 'Dipodomyinae belongs to Heteromyidae'
- 'Dipodomys belongs to Dipodomyinae'
- 'Dipodomys agilis belongs to Dipodomys'
- 'Dipodomys gidleyi belongs to Dipodomys'
- 'Dipodomys merriami belongs to Dipodomys'
- 'Dipodomys ordii belongs to Dipodomys'
- 'Dipodomys spectabilis belongs to Dipodomys'
- 'Dipoides belongs to Castoridae'
- 'Dipoides intermedius belongs to Dipoides'
- 'Dipoides rexroadensis belongs to Dipoides'
- 'Dipus hudsonius is recombined as Zapus hudsonius'
- 'Dipus hudsonius belongs to Dipus' according to Zimmermann 1780
- 'Dolichohippus is a subjective synonym of Equus'
- 'Dolomys minor is recombined as Pliopotamys minor'
- 'Dugongidae belongs to Sirenia'
- 'Dysopes glaucinus is recombined as Eumops glaucinus'
- 'Dysopes glaucinus belongs to Dysopes' according to Wagner 1843
- 'Elephantidae belongs to Proboscidea'
- 'Elephas (Euelephas) imperator is a subjective synonym of Mammuthus columbi'
- 'Elephas americanus is a subjective synonym of Mammuthus primigenius'
- 'Elephas americanus is recombined as Mammut americanum'
- 'Elephas columbi is recombined as Mammuthus columbi'
- 'Elephas eellsi is a subjective synonym of Mammuthus jeffersonii'
- 'Elephas eellsi is a subjective synonym of Parelephas eelsi' according to Osborn 1942
- 'Elephas eellsi belongs to Elephas' according to Hay 1926
- 'Elephas exilis is a subjective synonym of Mammuthus jeffersonii'
- 'Elephas exilis is recombined as Archidiskodon exilis' according to Osborn 1942
- 'Elephas exilis belongs to Elephas' according to Stock and Furlong 1928
- 'Elephas floridanus is a subjective synonym of Mammuthus jeffersonii'
- 'Elephas floridanus is recombined as Parelephas floridanus' according to Osborn 1942
- 'Elephas haroldcooki is a subjective synonym of Mammuthus meridionalis'
- 'Elephas haroldcooki is a subjective synonym of Mammuthus meridionalis' according to Maglio 1973
- 'Elephas imperator is a subjective synonym of Mammuthus columbi'
- 'Elephas imperator belongs to Elephas' according to Leidy 1858
- 'Elephas jacksoni is a subjective synonym of Mammuthus primigenius'
- 'Elephas jacksoni is recombined as Parelephas jacksoni' according to Osborn 1942
- 'Elephas jacksoni belongs to Elephas' according to Mather 1838
- 'Elephas jeffersonii is recombined as Mammuthus jeffersonii'
- 'Elephas jeffersonii is recombined as Parelephas jeffersonii' according to Osborn 1942
- 'Elephas maibeni is a subjective synonym of Mammuthus columbi'
- 'Elephas meridionalis is recombined as Mammuthus meridionalis'
- 'Elephas meridionalis is recombined as Mammuthus meridionalis' according to Maglio 1973
- 'Elephas primigenius is recombined as Mammuthus primigenius'
- 'Elephas primigenius is recombined as Mammonteus primigenius' according to Osborn 1942
- 'Elephas roosevelti is a subjective synonym of Mammuthus jeffersonii'
- 'Elephas roosevelti is recombined as Parelephas roosevelti' according to Osborn 1942
- 'Elephas roosevelti belongs to Elephas' according to Hay 1922
- 'Elephas washingtonii is a subjective synonym of Mammuthus jeffersonii'
- 'Elephas washingtonii is recombined as Parelephas washingtonii' according to Osborn 1942
- 'Eligmodontia arizonae is recombined as Bensonomys arizonae'
- 'Enhydra belongs to Lutrinae'
- 'Enhydra macrodonta belongs to Enhydra'
- 'Enhydriodon belongs to Lutrinae'
- 'Eocastoroides is a subjective synonym of Procastoroides'
- 'Eocastoroides lanei is a subjective synonym of Procastoroides sweeti'
- 'Eptesicus belongs to Vespertilionae'
- 'Equidae belongs to Perissodactyla'
- 'Equus belongs to Equidae'
- 'Equus (Asinus) calobatus is recombined as Equus calobatus' according to Troxel 1915
- 'Equus (Asinus) calobatus is recombined as Equus calobatus'
- 'Equus mexicanus is a subjective synonym of Equus giganteus'
- 'Equus achates is a subjective synonym of Equus tau'
- 'Equus bautistensis is a subjective synonym of Equus occidentalis'
- 'Equus complicatus belongs to Equus'
- 'Equus conversidens belongs to Equus'
- 'Equus crenidens [misspelled as Equus crinidens] belongs to Equus'
- 'Equus cumminsii belongs to Equus'
- 'Equus excelsus belongs to Equus'
- 'Equus francisci is a subjective synonym of Equus tau'
- 'Equus fraternus belongs to Equus'
- 'Equus giganteus belongs to Equus'
- 'Equus hatcheri is a subjective synonym of Equus niobrarensis'
- 'Equus hemionus belongs to Equus'
- 'Equus idahoensis is a subjective synonym of Equus simplicidens'
- 'Equus lambei belongs to Equus'
- 'Equus laurentius is a subjective synonym of Equus caballus'
- 'Equus littoralis is a subjective synonym of Equus tau'
- 'Equus midlandensis is a subjective synonym of Equus scotti'
- 'Equus minutus is a subjective synonym of Nannippus phlegon'
- 'Equus niobrarensis belongs to Equus'
- 'Equus occidentalis belongs to Equus'
- 'Equus pacificus belongs to Equus'
- 'Equus parastylidens belongs to Equus'
- 'Equus pectinatus belongs to Equus'
- 'Equus phlegon is recombined as Nannippus phlegon'
- 'Equus quinni is a subjective synonym of Equus tau'
- 'Equus scotti belongs to Equus'
- 'Equus semiplicatus is a subjective synonym of Equus conversidens'
- 'Equus semiplicatus is a subjective synonym of Equus intermedius' according to Matthew 1903
- 'Equus simplicidens belongs to Equus'
- 'Equus simplicidens belongs to Equus' according to Hibbard 1951
- 'Equus tau belongs to Equus'
- 'Eremotherium belongs to Megatheriidae'
- 'Eremotherium carolinense is a subjective synonym of Eremotherium rusconii'
- 'Eremotherium carolinense belongs to Eremotherium' according to Spillmann 1948
- 'Erethizon belongs to Erethizontidae'
- 'Erethizon bathygnathum is recombined as Coendou bathygnathum'
- 'Erethizontidae belongs to Rodentia'
- 'Erignathus belongs to Phocinae'
- 'Etadonomys belongs to Dipodomyinae'
- 'Etadonomys tiheni belongs to Etadonomys'
- 'Euarctos optimus belongs to Euarctos' according to Shultz 1938
- 'Euarctos optimus is a subjective synonym of Ursus americanus'
- 'Euarctos vitabilis is a subjective synonym of Ursus americanus'
- 'Euarctos vitabilis belongs to Ursus' according to Gidley 1913
- 'Euceratherium belongs to Caprinae'
- 'Euceratherium bizzelli is a subjective synonym of Euceratherium collinum'
- 'Euceratherium collinum belongs to Euceratherium'
- 'Eumetopias belongs to Otariidae'
- 'Eumops belongs to Molossidae'
- 'Eumylodon chapadmalensis is recombined as Glossotherium chapadmalense'
- 'Eutamias belongs to Sciuridae'
- 'Felidae belongs to Fissipedia'
- 'Felinae belongs to Felidae'
- 'Felis belongs to Felinae'
- 'Felis (Lynx) canadensis is recombined as Lynx canadensis'
- 'Felis amnicola belongs to Felis'
- 'Panthera leo atrox is a subjective synonym of Panthera leo'
- 'Felis augustus is a subjective synonym of Panthera onca'
- 'Felis bituminosa is a subjective synonym of Felis concolor'
- 'Felis bituminosa belongs to Felis' according to J. Merriam and Stock 1932
- 'Felis calcaratus is a subjective synonym of Lynx rufus'
- 'Felis calcaratus is a subjective synonym of Lynx rufus' according to Ewer 1973
- 'Felis calcaratus belongs to Felis' according to Cope 1899
- 'Felis concolor belongs to Felis'
- 'Felis daggetti is a subjective synonym of Felis concolor'
- 'Felis daggetti belongs to Felis' according to Merriam 1918
- 'Felis fatalis is recombined as Smilodon fatalis' according to J. Merriam and Stock 1932
- 'Felis fatalis is recombined as Smilodon fatalis'
- 'Felis fatalis is recombined as Smilodon fatalis' according to Slaughter 1963
- 'Felis hawveri is a subjective synonym of Felis concolor'
- 'Felis hawveri belongs to Felis' according to Stock 1918
- 'Felis hillanus is a subjective synonym of Borophagus diversidens'
- 'Felis imperialis is a subjective synonym of Panthera leo'
- 'Felis issiodorensis belongs to Felis' according to Croizet and Jobert 1828
- 'Felis issiodorensis is recombined as Lynx issiodorensis'
- 'Felis lacustris belongs to Felis'
- 'Felis leo is recombined as Panthera leo'
- 'Felis longicrus is a subjective synonym of Acinonyx trumani'
- 'Felis lynx is recombined as Lynx lynx'
- 'Felis onca is recombined as Panthera onca'
- 'Felis pardalis belongs to Felis'
- 'Felis rexroadensis is a subjective synonym of Felis lacustris'
- 'Felis rufa is recombined as Lynx rufus'
- 'Felis rufa is recombined as Lynx rufus' according to Ewer 1973
- 'Felis studeri is recombined as Acinonyx studeri'
- 'Felis studeri is a subjective synonym of Felis inexpectata' according to Kurten 1976
- 'Felis trumani is recombined as Acinonyx trumani'
- 'Felis trumani belongs to Felis' according to Orr 1969
- 'Felis veronis is a subjective synonym of Panthera onca'
- 'Felis wiedii belongs to Felis'
- 'Felis yagouaroundi belongs to Felis'
- 'Ferinestrix belongs to Mellivorinae'
- 'Ferinestrix vorax belongs to Ferinestrix'
- 'Fiber annectens is recombined as Ondatra annectens'
- 'Fiber annectens is a subjective synonym of Ondatra zibethicus' according to R. Martin 1993
- 'Fiber annectens belongs to Fiber' according to Brown 1908
- 'Fiber nebrascensis is recombined as Ondatra nebrascensis'
- 'Fiber oregonus is a subjective synonym of Ondatra zibethicus'
- 'Fiber oregonus belongs to Fiber' according to Hollister 1911
- 'Fissipeda was reranked as the suborder Fissipedia and belongs to Carnivora'
- 'Geomyidae belongs to Rodentia'
- 'Geomys belongs to Geomyidae'
- 'Geomys adamsi belongs to Geomys'
- 'Geomys bisulcatus is a subjective synonym of Geomys bursarius'
- 'Geomys garbanii belongs to Geomys'
- 'Geomys minor is recombined as Nerterogeomys minor'
- 'Geomys paenebursarius is recombined as Nerterogeomys paenebursarius'
- 'Geomys parvidens is a subjective synonym of Geomys bursarius'
- 'Geomys parvidens is a subjective synonym of Geomys bursarius' according to J. White and Downs 1961
- 'Geomys persimilis is recombined as Nerterogeomys persimilis'
- 'Geomys pinetis belongs to Geomys'
- 'Geomys quinni belongs to Geomys'
- 'Geomys smithi is recombined as Nerterogeomys smithi'
- 'Geomys townsendii is recombined as Thomomys townsendii'
- 'Geomys townsendii is recombined as Thomomys townsendii' according to Thaeler 1968
- 'Geomys umbrinus belongs to Geomys' according to Richardson 1829
- 'Geomys umbrinus is recombined as Thomomys umbrinus'
- 'Gigantocamelus is a subjective synonym of Titanotylopus'
- 'Gigantocamelus fricki is a subjective synonym of Titanotylopus spatulus'
- 'Glaucomys belongs to Sciuridae'
- 'Glossotherium belongs to Mylodontidae'
- 'Glyptodon belongs to Glyptodontidae'
- 'Glyptodon mexicano is recombined as Glyptotherium mexicanum'
- 'Glyptodon petaliferus is a nomen nudum'
- 'Glyptodon septentrionalis is recombined as Holmesina septentrionalis'
- 'Glyptodontidae belongs to Edentata'
- 'Glyptotherium belongs to Glyptodontidae'
- 'Glyptotherium arizonae belongs to Glyptotherium'
- 'Glyptotherium texanum belongs to Glyptotherium'
- 'Gomphotheriidae belongs to Proboscidea'
- 'Grisoninae belongs to Mustelidae'
- 'Gulo belongs to Mustelinae'
- 'Gulo gidleyi is a subjective synonym of Gulo schlosseri'
- 'Gulo schlosseri belongs to Gulo'
- 'Halichoerus belongs to Phocinae'
- 'Hayoceros belongs to Antilocapridae'
- 'Hemiauchenia belongs to Camelidae'
- 'Hesperomys boylii is recombined as Peromyscus boylii'
- 'Hesperomys crinitus is recombined as Peromyscus crinitus'
- 'Hesperomys crinitus belongs to Hesperomys' according to Merriam 1891
- 'Hesperomys eremicus is recombined as Peromyscus eremicus'
- 'Hesperomys eremicus belongs to Hesperomys' according to Baird 1858
- 'Hesperomys floridanus is recombined as Peromyscus floridanus'
- 'Hesperomys floridanus belongs to Hesperomys' according to Chapman 1889
- 'Hesperomys gossypinus is recombined as Peromyscus gossypinus'
- 'Hesperomys gossypinus belongs to Hesperomys' according to Le Conte 1853
- 'Hesperomys maniculatus is recombined as Peromyscus maniculatus'
- 'Hesperomys taylori is recombined as Baiomys taylori'
- 'Hesperomys torridus is recombined as Onychomys torridus'
- 'Hesperomys torridus belongs to Hesperomys' according to Coues 1874
- 'Hesperomys truei is recombined as Peromyscus truei'
- 'Hesperoscalops blancoensis is recombined as Scalopus blancoensis'
- 'Hesperoscalops rexroadi is recombined as Scalopus rexroadi'
- 'Heterogeomys belongs to Geomyidae'
- 'Heterogeomys onerosus belongs to Heterogeomys'
- 'Heteromyidae belongs to Rodentia'
- 'Heteromyinae belongs to Heteromyidae'
- 'Heteromys irroratus is recombined as Liomys irroratus'
- 'Heteromys irroratus belongs to Heteromys' according to Gray 1868
- 'Hipparion (Nannippus) was reranked as Nannippus and belongs to Equidae'
- 'Hipparion cragini is a subjective synonym of Nannippus phlegon'
- 'Hipposideros belongs to Hipposideridae'
- 'Histiotus belongs to Vespertilionae'
- 'Holmesina belongs to Pampatheriinae'
- 'Holomeniscus macrocephalus is recombined as Hemiauchenia macrocephala'
- 'Holomeniscus sulcatus is recombined as Camelops sulcatus'
- 'Hominidae belongs to Primates'
- 'Homo belongs to Hominidae'
- 'Homo sapiens belongs to Homo'
- 'Homotherium belongs to Machairodontinae'
- 'Hyaenidae belongs to Fissipedia'
- 'Hyaenognathus direptor is recombined as Borophagus direptor'
- 'Hyaenognathus matthewi is a subjective synonym of Borophagus diversidens'
- 'Hyaenognathus pachyodon is a subjective synonym of Borophagus diversidens'
- 'Hyaenognathus solus is a subjective synonym of Borophagus direptor'
- 'Hydrochoeridae belongs to Rodentia'
- 'Hydrochoerus belongs to Hydrochoeridae'
- 'Hydrochoerus holmesi belongs to Hydrochoerus'
- 'Hydrochoerus pinckneyi is recombined as Neochoerus pinckneyi'
- 'Hydrochoerus pinckneyi is recombined as Neochoerus pinckneyi' according to Mones 1975
- 'Hydrochoerus pinckneyi is recombined as Neochoerus pinckneyi' according to Webb 1974
- 'Hydrochoerus pinckneyi is recombined as Neochoerus pinckneyi' according to Alvarez 1969
- 'Hydrochoerus pinckneyi is recombined as Neochoerus pinckneyi' according to Ray 1958
- 'Hydrochoerus pinckneyi is recombined as Neochoerus pinckneyi' according to Ray 1957
- 'Hydrochoerus pinckneyi is recombined as Neochoerus pinckneyi' according to Gazin 1950
- 'Hydrochoerus pinckneyi is recombined as Neochoerus pinckneyi' according to Gut 1939
- 'Hydrochoerus pinckneyi is recombined as Neochoerus pinckneyi' according to Simpson 1932
- 'Hydrochoerus pinckneyi is recombined as Neochoerus pinckneyi' according to Kraglievich 1930
- 'Hydrodamalis belongs to Dugongidae'
- 'Hypolagus belongs to Archaeolaginae'
- 'Hypolagus arizonensis belongs to Hypolagus'
- 'Hypolagus furlongi belongs to Hypolagus'
- 'Hypolagus limnetus belongs to Hypolagus'
- 'Hypolagus regalis belongs to Hypolagus'
- 'Hypudaeus leucogaster is recombined as Onychomys leucogaster'
- 'Hypudaeus leucogaster belongs to Hypudaeus' according to Wied-Neuwied 1841
- 'Hypudaeus ochrogaster is recombined as Microtus ochrogaster' according to Hall and Kelson 1959
- 'Hypudaeus ochrogaster belongs to Hypudaeus' according to Wagner 1842
- 'Hypudaeus ochrogaster is recombined as Microtus ochrogaster'
- 'Hystrix dorsata is recombined as Erethizon dorsatum'
- 'Hystrix dorsata is recombined as Erethizon dorsatum' according to Cuvier 1822
- 'Ibex iowensis belongs to Ibex' according to Palmer 1956
- 'Ibex iowensis is recombined as Capra iowensis'
- 'Icaronycteris belongs to Archaeonycterididae'
- 'Ischnoglossa nivalis is recombined as Leptonycteris nivalis'
- 'Ischnoglossa nivalis belongs to Ischnoglossa' according to Saussure 1860
- 'Ischyrosmilus belongs to Machairodontinae'
- 'Ischyrosmilus crusafonti is a subjective synonym of Ischyrosmilus ischyrus'
- 'Ischyrosmilus crusafonti belongs to Ischyrosmilus' according to Schultz and L. Martin 1970
- 'Ischyrosmilus idahoensis is a subjective synonym of Ischyrosmilus ischyrus'
- 'Ischyrosmilus johnstoni is a subjective synonym of Ischyrosmilus ischyrus'
- 'Kraglievichia belongs to Pampatheriinae'
- 'Kraglievichia floridanus belongs to Kraglievichia'
- 'Lagomys collaris is recombined as Ochotona collaris'
- 'Lagomys collaris is a subjective synonym of Ochotona alpina' according to Corbet 1978
- 'Lagomys collaris belongs to Lagomys' according to Nelson 1893
- 'Lagurus belongs to Microtinae'
- 'Lama hollomani is a subjective synonym of Hemiauchenia macrocephala'
- 'Lama stevensi is a subjective synonym of Hemiauchenia macrocephala'
- 'Lasionycteris belongs to Vespertilionae'
- 'Lasiurus belongs to Vespertilionae'
- 'Lasiurus fossilis belongs to Lasiurus'
- 'Lasiurus intermedius belongs to Lasiurus' according to H. Allen 1862
- 'Lasiurus intermedius belongs to Lasiurus'
- 'Lemmus belongs to Microtinae'
- 'Lemmus sibiricus belongs to Lemmus'
- 'Leporidae belongs to Lagomorpha'
- 'Leporinae belongs to Leporidae'
- 'Leptonycteris belongs to Phyllostomatinae'
- 'Lepus belongs to Leporinae'
- 'Lepus alleni belongs to Lepus'
- 'Lepus americanus belongs to Lepus'
- 'Lepus aquaticus is recombined as Limnolagus aquaticus' according to Corbet 1983
- 'Lepus aquaticus is recombined as Limnolagus aquaticus' according to Lyon 1904
- 'Lepus aquaticus belongs to Lepus' according to Bachman 1837
- 'Lepus aquaticus is recombined as Sylvilagus aquaticus'
- 'Lepus arcticus belongs to Lepus'
- 'Lepus audubonii is recombined as Sylvilagus audubonii'
- 'Lepus audubonii belongs to Lepus' according to Baird 1858
- 'Lepus bachmani is recombined as Sylvilagus bachmani'
- 'Lepus bachmani belongs to Lepus' according to Waterhouse 1839
- 'Lepus benjamini belongs to Lepus'
- 'Lepus californicus belongs to Lepus'
- 'Lepus giganteus is a subjective synonym of Lepus alleni'
- 'Lepus idahoensis is recombined as Brachylagus idahoensis'
- 'Lepus nuttalli [misspelled as Sylvilagus nuttalli] belongs to Sylvilagus'
- 'Lepus nuttalli belongs to Lepus' according to Bachman 1837
- 'Lepus palustris belongs to Lepus' according to Bachman 1837
- 'Lepus palustris is recombined as Sylvilagus palustris'
- 'Lepus palustris is recombined as Limnolagus palustris' according to Corbet 1983
- 'Lepus palustris is recombined as Limnolagus palustris' according to Lyon 1904
- 'Lepus princeps is recombined as Ochotona princeps'
- 'Lepus princeps is a subjective synonym of Ochotona alpina' according to Corbet 1978
- 'Lepus princeps belongs to Lepus' according to Richardson 1828
- 'Lepus sylvaticus is replaced by Lepus floridanus' according to Allen 1899
- 'Lepus sylvaticus floridanus is recombined as Sylvilagus floridanus'
- 'Lepus sylvaticus floridanus belongs to Lepus sylvaticus' according to Allen 1890
- 'Lepus sylvaticus floridanus is recombined as Lepus floridanus' according to Allen 1899
- 'Lepus townsendii belongs to Lepus'
- 'Lepus transitionalis is recombined as Sylvilagus transitionalis'
- 'Lepus transitionalis belongs to Lepus' according to Bangs 1895
- 'Lepus vetus is recombined as Hypolagus vetus'
- 'Liomys belongs to Heteromyidae'
- 'Liomys centralis is recombined as Prodipodomys centralis'
- 'Liomys centralis is recombined as Prodipodomys centralis' according to Hibbard 1972
- 'Liops zuniensis is a subjective synonym of Symbos cavifrons'
- 'Lontra belongs to Mustelidae'
- 'Lupus niger is a subjective synonym of Canis rufus'
- 'Lutra belongs to Lutrinae'
- 'Lutra (Satherium) ingens is a subjective synonym of Satherium piscinarium'
- 'Lutra iowa is a subjective synonym of Lutra canadensis'
- 'Lutra iowa belongs to Lutra' according to Goldman 1941
- 'Lutra parvicuspis is a subjective synonym of Lutra canadensis'
- 'Lutra piscinaria is recombined as Satherium piscinarium'
- 'Lutra rhoadsii is a subjective synonym of Lutra canadensis'
- 'Lutravus cookii is recombined as Trigonictis cookii'
- 'Lutravus idahoensis is recombined as Trigonictis idahoensis'
- 'Lutreola macrodon is recombined as Mustela macrodon'
- 'Lutrinae belongs to Mustelidae'
- 'Lynx belongs to Felinae'
- 'Machaerodus floridanus is a subjective synonym of Smilodon fatalis'
- 'Machaerodus floridanus is a subjective synonym of Smilodon fatalis' according to Kurten 1965
- 'Machaerodus floridanus is a subjective synonym of Smilodon fatalis' according to Bovard 1907
- 'Machaerodus ischyrus is recombined as Ischyrosmilus ischyrus'
- 'Machairodontinae belongs to Felidae'
- 'Machairodus hesperus is recombined as Megantereon hesperus'
- 'Machairodus hesperus is recombined as Megantereon hesperus' according to Schultz and L. Martin 1970
- 'Mammut belongs to Mammutidae'
- 'Mammut progenium is a subjective synonym of Mammut americanum'
- 'Mammut progenium is recombined as Mastodon progenius' according to Osborn 1942
- 'Mammut progenium belongs to Mammut' according to Hay 1914
- 'Mammuthus belongs to Elephantidae'
- 'Mammutidae belongs to Proboscidea'
- 'Manati gigas is recombined as Hydrodamalis gigas'
- 'Marmota belongs to Sciuridae'
- 'Marmota arizonae belongs to Marmota'
- 'Marmota mexicana is a subjective synonym of Paenemarmota barbouri'
- 'Martes belongs to Mustelinae'
- 'Martes caurina nobilis is recombined as Martes nobilis'
- 'Martes gazini belongs to Martes' according to Hibbard 1958
- 'Martes gazini is a subjective synonym of Mustela rexroadensis'
- 'Martes parapennanti is a subjective synonym of Martes diluviana'
- 'Mastodon is a subjective synonym of Mammut'
- 'Mastodon is a subjective synonym of Mammut' according to Simpson 1945
- 'Mastodon (Tetralophodon) mirificus is recombined as Stegomastodon mirificus'
- 'Mastodon (Tetralophodon) mirificus is recombined as Stegomastodon mirificus' according to Hibbard 1951
- 'Mastodon giganteus is a subjective synonym of Mammut americanum'
- 'Mastodon giganteum belongs to Mastodon' according to Cuvier 1817
- 'Mastodon shepardii is a subjective synonym of Rhynchotherium praecursor'
- 'Mastodon successor is a subjective synonym of Stegomastodon mirificus'
- 'Matthesia belongs to Archaeonycterididae'
- 'Megachiroptera belongs to Chiroptera'
- 'Megaderma belongs to Megadermatidae'
- 'Megalonychidae belongs to Edentata'
- 'Megalonyx belongs to Megalonychidae'
- 'Megalonyx brachycephalus is a subjective synonym of Megalonyx jeffersonii'
- 'Megalonyx californicus is a subjective synonym of Megalonyx jeffersonii'
- 'Megalonyx californicus belongs to Megalonyx' according to Stock 1913
- 'Megalonyx dissimilis is a subjective synonym of Megalonyx jeffersonii'
- 'Megalonyx harlani is recombined as Glossotherium harlani'
- 'Megalonyx harlani is recombined as Mylodon harlani' according to Lydekker 1887
- 'Megalonyx harlani is recombined as Mylodon harlani' according to Owen 1859
- 'Megalonyx harlani belongs to Megalonyx' according to Owen 1840
- 'Megalonyx hogani belongs to Megalonyx' according to Stovall 1940
- 'Megalonyx hogani is a subjective synonym of Megalonyx jeffersonii'
- 'Megalonyx laqueatus is a subjective synonym of Megalonyx jeffersonii'
- 'Megalonyx laqueatus belongs to Megalonyx' according to Harlan 1831
- 'Megalonyx leidyi is a subjective synonym of Megalonyx jeffersonii'
- 'Megalonyx leptostomus belongs to Megalonyx'
- 'Megalonyx loxodon is a subjective synonym of Megalonyx wheatleyi'
- 'Megalonyx milleri is a subjective synonym of Megalonyx jeffersonii'
- 'Megalonyx milleri belongs to Megalonyx' according to Lyon 1938
- 'Megalonyx scalper is a subjective synonym of Megalonyx wheatleyi'
- 'Megalonyx scalper belongs to Megalonyx' according to Cope 1899
- 'Megalonyx sierrensis is a subjective synonym of Megalonyx jeffersonii'
- 'Megalonyx sierrensis belongs to Megalonyx' according to Sinclair 1905
- 'Megalonyx sphenodon is a subjective synonym of Megalonyx wheatleyi'
- 'Megalonyx tortulus is a subjective synonym of Megalonyx wheatleyi'
- 'Megalonyx wheatleyi belongs to Megalonyx'
- 'Megantereon belongs to Machairodontinae'
- 'Megatheriadae is corrected as Megatheriidae and belongs to Edentata'
- 'Megatherium jeffersonii is recombined as Megalonyx jeffersonii'
- 'Megatherium mirabile is a subjective synonym of Eremotherium rusconii'
- 'Megatherium mirabile belongs to Megatherium' according to Leidy 1855
- 'Megatherium rusconii is recombined as Eremotherium rusconii'
- 'Melinae belongs to Mustelidae'
- 'Mellivorinae belongs to Mustelidae'
- 'Mephitinae belongs to Mustelidae'
- 'Mephitis belongs to Mephitinae'
- 'Mephitis fossidens is a subjective synonym of Osmotherium spelaeum'
- 'Mephitis leptops is a subjective synonym of Osmotherium spelaeum'
- 'Mephitis leuconotus is recombined as Conepatus leuconotus'
- 'Mephitis leuconotus is recombined as Conepatus leuconotus' according to Hall and Kelson 1959
- 'Mephitis leuconotus belongs to Mephitis' according to Lichtenstein 1832
- 'Mephitis mesoleucus is a subjective synonym of Conepatus leuconotus'
- 'Mephitis mesoleucus is recombined as Conepatus mesoleucus' according to Hall and Kelson 1959
- 'Mephitis mesoleucus belongs to Mephitis' according to Lichtenstein 1832
- 'Mephitis obtusata is recombined as Brachyprotoma obtusata'
- 'Mephitis orthostichus is a subjective synonym of Osmotherium spelaeum'
- 'Microchiroptera belongs to Chiroptera'
- 'Microsorex belongs to Soricidae'
- 'Microsorex minutus belongs to Microsorex'
- 'Microsorex pratensis belongs to Microsorex'
- 'Microtinae belongs to Cricetidae'
- 'Microtus belongs to Microtinae'
- 'Microtus deceitensis belongs to Microtus'
- 'Microtus diluvianus is recombined as Neofiber diluvianus'
- 'Microtus diluvianus is recombined as Neofiber diluvianus' according to Hibbard 1955
- 'Microtus diluvianus belongs to Microtus' according to Cope 1896
- 'Microtus guildayi belongs to Microtus'
- 'Microtus involutus belongs to Microtus' according to Cope 1871
- 'Microtus involutus is a subjective synonym of Microtus guildayi'
- 'Microtus llanensis belongs to Microtus'
- 'Microtus llanensis belongs to Microtus' according to Hibbard 1944
- 'Microtus miurus belongs to Microtus'
- 'Microtus paroperarius belongs to Microtus'
- 'Mictomys is a subjective synonym of Synaptomys'
- 'Mimomys belongs to Microtinae'
- 'Mimomys monahani belongs to Mimomys'
- 'Mimomys parvus is recombined as Ophiomys parvus'
- 'Miniopterus belongs to Vespertilionidae'
- 'Mirounga belongs to Monachinae'
- 'Mirounga angustirostris belongs to Mirounga'
- 'Molossidae belongs to Microchiroptera'
- 'Molossides is a subjective synonym of Eumops' according to R. Martin 1972
- 'Molossides is a subjective synonym of Eumops'
- 'Molossides floridanus is a subjective synonym of Eumops glaucinus'
- 'Molossides floridanus is recombined as Eumops floridanus' according to R. Martin 1972
- 'Molossus perotis is recombined as Eumops perotis'
- 'Molossus perotis belongs to Molossus' according to Schinz 1821
- 'Monachinae belongs to Phocidae'
- 'Monachus belongs to Monachinae'
- 'Mormoopidae belongs to Microchiroptera'
- 'Mormoops belongs to Mormoopidae'
- 'Mormoops megaphylla belongs to Mormoops'
- 'Morotherium leptonyx is a subjective synonym of Megalonyx leptostomus'
- 'Mus bursarius is recombined as Geomys bursarius'
- 'Mus bursarius belongs to Mus' according to Shaw 1800
- 'Mus cinereus is recombined as Neotoma cinerea'
- 'Mus cinereus belongs to Mus' according to Ord 1815
- 'Mus floridanus is recombined as Neotoma floridana'
- 'Mus floridanus belongs to Mus' according to Ord 1818
- 'Mus hudsonius belongs to Mus' according to Pallas 1778
- 'Mus hudsonius is recombined as Dicrostonyx hudsonius'
- 'Mus hudsonius is recombined as Dicrostonyx hudsonius' according to Gloger 1841
- 'Mus humulis is recombined as Reithrodontomys humulis'
- 'Mus humulis belongs to Mus' according to Audubon and Bachman 1841
- 'Mus monax is recombined as Marmota monax'
- 'Mus pennsylvanicus is recombined as Microtus pennsylvanicus'
- 'Mus pennsylvanicus belongs to Mus' according to Ord 1815
- 'Mus polionotus is recombined as Peromyscus polionotus'
- 'Mus polionotus belongs to Mus' according to Wagner 1843
- 'Mus torquatus is recombined as Dicrostonyx torquatus'
- 'Mus volans is recombined as Glaucomys volans'
- 'Musculus leucopus is recombined as Peromyscus leucopus'
- 'Musculus leucopus belongs to Musculus' according to Rafinesque 1818
- 'Mustela belongs to Mustelinae'
- 'Mustela diluviana is recombined as Martes diluviana'
- 'Mustela erminea belongs to Mustela'
- 'Mustela eversmanni belongs to Mustela'
- 'Mustela frenata belongs to Mustela'
- 'Mustela gazini is a subjective synonym of Mustela rexroadensis'
- 'Mustela gulo is recombined as Gulo gulo'
- 'Mustela lutra canadensis is recombined as Lutra canadensis'
- 'Mustela lutris is recombined as Enhydra lutris'
- 'Mustela meltoni belongs to Mustela'
- 'Mustela pennanti is recombined as Martes pennanti'
- 'Mustela reliquus is a subjective synonym of Mustela frenata'
- 'Mustela rexroadensis belongs to Mustela'
- 'Mustela zibellina americana is recombined as Martes americana'
- 'Mustelidae belongs to Fissipedia'
- 'Mustelinae belongs to Mustelidae'
- 'Mylodon is a subjective synonym of Glossotherium'
- 'Mylodon is a subjective synonym of Glossotherium' according to Hofstetter 1952
- 'Mylodon is a subjective synonym of Glossotherium' according to Simpson 1945
- 'Mylodon belongs to Mylodontidae' according to Owen 1859
- 'Mylodon garmani belongs to Mylodon' according to Allen 1913
- 'Mylodon garmani is a subjective synonym of Glossotherium harlani'
- 'Mylodon renidens is a subjective synonym of Glossotherium harlani'
- 'Mylodon sodalis is a subjective synonym of Glossotherium harlani'
- 'Mylodon sodalis belongs to Mylodon' according to Cope 1878
- 'Mylodon sulcidens is a subjective synonym of Glossotherium harlani'
- 'Mylodontidae belongs to Edentata'
- 'Mylohyus belongs to Tayassuidae'
- 'Mylohyus browni is a subjective synonym of Mylohyus nasutus'
- 'Mylohyus exortivus is a subjective synonym of Mylohyus nasutus'
- 'Mylohyus gidleyi is a subjective synonym of Mylohyus nasutus'
- 'Mylohyus gidleyi belongs to Mylohyus' according to Simpson 1929
- 'Mylohyus tetragonus is a subjective synonym of Mylohyus nasutus'
- 'Mylohyus tetragonus belongs to Mylohyus' according to Cope 1899
- 'Myotis belongs to Vespertilionae'
- 'Myotis grisecens belongs to Myotis'
- 'Myotis mangamolaris belongs to Myotis'
- 'Myotis rectidens is corrected as Myotis rectidentis and belongs to Myotis'
- 'Myotis sodalis belongs to Myotis'
- 'Myotis thysanodes belongs to Myotis'
- 'Myzopoda belongs to Myzopodidae'
- 'Nannippus beckensis belongs to Nannippus'
- 'Napaeozapus belongs to Zapodidae'
- 'Navahoceros belongs to Odocoileinae'
- 'Nebraskomys belongs to Microtinae'
- 'Nebraskomys mcgrewi belongs to Nebraskomys'
- 'Nebraskomys rexroadensis belongs to Nebraskomys'
- 'Nebraskomys taylori is recombined as Ophiomys taylori'
- 'Necromantis belongs to Megadermatidae'
- 'Nekrolagus belongs to Leporinae'
- 'Neochoerus belongs to Hydrochoeridae'
- 'Neofiber belongs to Microtinae'
- 'Neofiber alleni belongs to Neofiber'
- 'Neofiber leonardi belongs to Neofiber'
- 'Neomeryx finni is a subjective synonym of Antilocapra americana'
- 'Neosorex lacustris is recombined as Sorex lacustris'
- 'Neotoma belongs to Cricetinae'
- 'Neotoma albigula belongs to Neotoma'
- 'Neotoma fossilis belongs to Neotoma'
- 'Neotoma fuscipes belongs to Neotoma'
- 'Neotoma lepida belongs to Neotoma'
- 'Neotoma magister is a subjective synonym of Neotoma floridana'
- 'Neotoma magister is a subjective synonym of Neotoma floridana' according to Schwartz and Odum 1957
- 'Neotoma magister is a subjective synonym of Neotoma pennsylvanica' according to Poole 1940
- 'Neotoma magister belongs to Neotoma' according to Baird 1857
- 'Neotoma mexicana belongs to Neotoma'
- 'Neotoma micropus belongs to Neotoma'
- 'Neotoma taylori belongs to Neotoma'
- 'Nerterogeomys belongs to Geomyidae'
- 'Nothrotheriops belongs to Megatheriidae'
- 'Nothrotherium graciliceps is a subjective synonym of Nothrotheriops shastensis'
- 'Nothrotherium graciliceps is a subjective synonym of Nothrotheriops shastensis' according to Paula Couto 1971
- 'Nothrotherium graciliceps is a subjective synonym of Nothrotherium shastense' according to Stock 1925
- 'Nothrotherium graciliceps belongs to Nothrotherium' according to Stock 1913
- 'Nothrotherium shastense is recombined as Nothrotheriops shastensis'
- 'Nothrotherium shastense is recombined as Nothrotheriops shastensis' according to Paula Couto 1971
- 'Nothrotherium shastense belongs to Nothrotherium' according to Sinclair 1905
- 'Nothrotherium texanum is a subjective synonym of Nothrotheriops shastensis' according to Paula Couto 1971
- 'Nothrotherium texanum is a subjective synonym of Nothrotherium shastense' according to Lull 1929
- 'Nothrotherium texanum belongs to Nothrotherium' according to Hay 1916
- 'Nothrotherium texanum is a subjective synonym of Nothrotheriops shastensis'
- 'Notiosorex belongs to Soricidae'
- 'Notiosorex jacksoni belongs to Notiosorex'
- 'Notolagus belongs to Archaeolaginae'
- 'Notonycteris belongs to Phyllostomatidae'
- 'Nyctalus belongs to Vespertilionidae'
- 'Nycticeius belongs to Vespertilionae'
- 'Nyctinomus belongs to Molossidae'
- 'Nyctinomus brasiliensis is recombined as Tadarida brasiliensis'
- 'Nyctinomus brasiliensis is recombined as Tadarida brasiliensis' according to R. Martin 1972
- 'Nyctinomus brasiliensis belongs to Nyctinomus' according to Geoffroy 1824
- 'Nyctophylinae belongs to Vespertilionidae'
- 'Ochotona belongs to Ochotonidae'
- 'Ochotona whartoni belongs to Ochotona'
- 'Ochotonidae belongs to Lagomorpha'
- 'Ochrotomys belongs to Cricetinae'
- 'Odobaenidae is corrected as Odobenidae and belongs to Pinnipedia'
- 'Odobenus belongs to Odobenidae'
- 'Odocoileinae belongs to Cervidae'
- 'Odocoileus belongs to Odocoileinae'
- 'Odocoileus brachydontus belongs to Odocoileus'
- 'Odocoileus cascensis is a subjective synonym of Odocoileus hemionus'
- 'Odocoileus cooki is a subjective synonym of Odocoileus virginianus'
- 'Odocoileus halli is a subjective synonym of Navahoceros fricki'
- 'Odocoileus halli belongs to Odocoileus' according to Alvarez 1969
- 'Odocoileus sheridanus is a subjective synonym of Odocoileus virginianus'
- 'Ogmodontomys belongs to Microtinae'
- 'Ogmodontomys poaphagus belongs to Ogmodontomys'
- 'Onager altidens is a subjective synonym of Equus hemionus'
- 'Onager arellanoi is a subjective synonym of Equus excelsus'
- 'Onager hibbardi is a subjective synonym of Equus excelsus'
- 'Ondatra belongs to Microtinae'
- 'Ondatra idahoensis belongs to Ondatra'
- 'Ondatra kansasensis is a subjective synonym of Ondatra annectens'
- 'Ondatra triradicatus is a subjective synonym of Ondatra nebrascensis'
- 'Onychomys belongs to Cricetinae'
- 'Onychomys fossilis belongs to Onychomys'
- 'Onychomys gidleyi belongs to Onychomys'
- 'Onychomys jinglebobensis belongs to Onychomys'
- 'Onychomys pedroensis belongs to Onychomys'
- 'Ophiomys belongs to Microtinae'
- 'Ophiomys fricki belongs to Ophiomys'
- 'Ophiomys magilli belongs to Ophiomys'
- 'Oreamnos belongs to Caprinae'
- 'Oreamnos harringtoni belongs to Oreamnos'
- 'Oryctomys bottae is recombined as Thomomys bottae'
- 'Oryctomys bottae belongs to Oryctomys' according to Eydoux and Gervais 1836
- 'Oryzomys belongs to Cricetinae'
- 'Oryzomys fossilis is a subjective synonym of Oryzomys palustris'
- 'Oryzomys palustris belongs to Oryzomys'
- 'Osmotherium belongs to Mephitinae'
- 'Osmotherium spelaeum belongs to Osmotherium'
- 'Osteoborus crassapineatus is a subjective synonym of Borophagus direptor'
- 'Osteoborus crassipinaetus belongs to Osteoborus' according to Olsen 1956
- 'Osteoborus crassipinaetus is a subjective synonym of Borophagus direptor'
- 'Osteoborus hilli is a subjective synonym of Borophagus direptor'
- 'Osteoborus progressus is a subjective synonym of Borophagus direptor'
- 'Osteoborus progressus belongs to Osteoborus' according to Hibbard 1944
- 'Otaria californiana is recombined as Zalophus californianus'
- 'Otariina was reranked as the family Otariidae and belongs to Pinnipedia'
- 'Otognosis longimembris is recombined as Perognathus longimembris'
- 'Otognosis longimembris belongs to Otognosis' according to Coues 1875
- 'Ovibos belongs to Caprinae'
- 'Ovibos cavifrons is recombined as Symbos cavifrons'
- 'Ovibos giganteus is a subjective synonym of Symbos cavifrons'
- 'Ovibos proximus is a subjective synonym of Ovibos moschatus'
- 'Ovibos yukonensis is a subjective synonym of Ovibos moschatus'
- 'Ovis belongs to Caprinae'
- 'Ovis canadensis belongs to Ovis'
- 'Ovis catclawensis is a subjective synonym of Ovis canadensis'
- 'Ovis catclawensis is recombined as Ovis canadensis catclawensis' according to Harris and Mundel 1974
- 'Ovis dalli belongs to Ovis'
- 'Paenemarmota belongs to Sciuridae'
- 'Paenemarmota barbouri belongs to Paenemarmota'
- 'Palaeochiropteryx belongs to Archaeonycterididae'
- 'Palaeolama belongs to Camelidae'
- 'Palaeonycteris belongs to Rhinolophidae'
- 'Palaeophyllopora belongs to Hipposideridae'
- 'Paleptesicus belongs to Vespertilionidae'
- 'Pampatheriinae belongs to Dasypodidae'
- 'Panthera belongs to Felinae'
- 'Panthera palaeoonca [misspelled as Dinofelis paleoonca] belongs to Dinofelis'
- 'Parabos dodsoni is recombined as Platycerabos dodsoni'
- 'Paracryptotis belongs to Soricidae'
- 'Paracryptotis rex belongs to Paracryptotis'
- 'Paradipoides belongs to Castoridae'
- 'Paradipoides stovalli belongs to Paradipoides'
- 'Parageomys tobinensis is recombined as Geomys tobinensis'
- 'Parahodomys is a subjective synonym of Neotoma'
- 'Parahodomys belongs to ' according to Gidley and Gazin 1933
- 'Parahodomys quadriplicatus is recombined as Neotoma quadriplicata'
- 'Parahodomys spelaeus is recombined as Neotoma spelaea'
- 'Parailurus belongs to Ailurinae'
- 'Paramylodon is a subjective synonym of Glossotherium'
- 'Paramylodon is a subjective synonym of Glossotherium' according to Hofstetter 1952
- 'Paramylodon is a subjective synonym of Glossotherium' according to Simpson 1945
- 'Paramylodon nebrascensis is a subjective synonym of Glossotherium harlani'
- 'Paraphyllophora belongs to Hipposideridae'
- 'Parascalops belongs to Talpidae'
- 'Parelephas is a subjective synonym of Mammuthus'
- 'Parelephas progressus is a subjective synonym of Mammuthus jeffersonii'
- 'Parelephas progressus belongs to Parelephas' according to Osborn 1942
- 'Pediolagus is a subjective synonym of Nekrolagus'
- 'Pediolagus progressus is recombined as Nekrolagus progressus'
- 'Pelycictis lobulatus is a subjective synonym of Osmotherium spelaeum'
- 'Perodipus ingens is recombined as Dipodomys ingens'
- 'Perodipus ingens belongs to Perodipus' according to Merriam 1904
- 'Perognathinae belongs to Heteromyidae'
- 'Perognathus belongs to Perognathinae'
- 'Perognathus apache belongs to Perognathus'
- 'Perognathus californicus belongs to Perognathus'
- 'Perognathus flavus belongs to Perognathus'
- 'Perognathus gidleyi belongs to Perognathus'
- 'Perognathus hispidus belongs to Perognathus'
- 'Perognathus inornatus belongs to Perognathus'
- 'Perognathus intermedius belongs to Perognathus'
- 'Perognathus magnus belongs to Perognathus'
- 'Perognathus pearlettensis belongs to Perognathus'
- 'Perognathus rexroadensis belongs to Perognathus'
- 'Peromyscus belongs to Cricetinae'
- 'Peromyscus anyapahensis belongs to Peromyscus'
- 'Peromyscus baumgartneri belongs to Peromyscus'
- 'Peromyscus berendsensis belongs to Peromyscus'
- 'Peromyscus brachygnathus is recombined as Baiomys brachygnathus'
- 'Peromyscus cochrani belongs to Peromyscus'
- 'Peromyscus cragini belongs to Peromyscus'
- 'Peromyscus cumberlandensis belongs to Peromyscus'
- 'Peromyscus eliasi is recombined as Bensonomys eliasi'
- 'Peromyscus eliasi is recombined as Bensonomys eliasi' according to Hibbard 1956
- 'Peromyscus eliasi is recombined as Calomys eliasi' according to Czaplewski 1987
- 'Peromyscus hagermanensis belongs to Peromyscus'
- 'Peromyscus imperfectus belongs to Peromyscus'
- 'Peromyscus irvingtonensis belongs to Peromyscus'
- 'Peromyscus kansasensis belongs to Peromyscus'
- 'Peromyscus minimus is recombined as Baiomys minimus'
- 'Peromyscus nesodytes belongs to Peromyscus'
- 'Peromyscus oklahomensis belongs to Peromyscus'
- 'Peromyscus pectoralis belongs to Peromyscus'
- 'Peromyscus progressus belongs to Peromyscus'
- 'Phenacomys belongs to Microtinae'
- 'Phenacomys intermedius belongs to Phenacomys'
- 'Phenacomys primaevus is recombined as Pliophenacomys primaevus'
- 'Phenacomys primaevus is recombined as Pliophenacomys primaevus' according to Hibbard 1972
- 'Phenacomys primaevus belongs to Phenacomys' according to Hibbard 1937
- 'Phoca belongs to Phocinae'
- 'Phoca barbata is recombined as Erignathus barbatus'
- 'Phoca cristata is recombined as Cystophora cristata'
- 'Phoca groenlandica belongs to Phoca'
- 'Phoca grypus is recombined as Halichoerus grypus'
- 'Phoca hispida belongs to Phoca'
- 'Phoca jubata is recombined as Eumetopias jubata'
- 'Phoca rosmarus is recombined as Odobenus rosmarus'
- 'Phoca tropicalis is recombined as Monachus tropicalis'
- 'Phoca ursina is recombined as Callorhinus ursinus'
- 'Phoca vitulina belongs to Phoca'
- 'Phocadae is corrected as Phocidae and belongs to Pinnipedia'
- 'Phocinae belongs to Phocidae'
- 'Phyllostomatidae belongs to Microchiroptera'
- 'Phyllostomatinae belongs to Phyllostomatidae'
- 'Pinnipedia was reranked as a suborder and belongs to Carnivora'
- 'Pipistrellus belongs to Vespertilionae'
- 'Pitymys aratai is recombined as Microtus aratai'
- 'Pitymys cumberlandensis is recombined as Microtus cumberlandensis'
- 'Pitymys cumberlandensis belongs to Pitymys' according to van der Meulen 1978
- 'Pitymys hibbardi is recombined as Microtus hibbardi'
- 'Pitymys hibbardi belongs to Pitymys' according to Holman 1959
- 'Pitymys mcnowni is recombined as Microtus mcnowni'
- 'Pitymys meadensis is recombined as Microtus meadensis' according to van der Meulen 1978
- 'Pitymys meadensis belongs to Pitymys' according to Hibbard 1944
- 'Pitymys meadensis is recombined as Microtus meadensis'
- 'Planisorex belongs to Soricidae'
- 'Platycerabos belongs to Bovinae'
- 'Platygonus belongs to Tayassuidae'
- 'Platygonus bicalcaratus belongs to Platygonus'
- 'Platygonus compressus belongs to Platygonus'
- 'Platygonus cumberlandensis is a subjective synonym of Platygonus vetus'
- 'Platygonus intermediatus is a subjective synonym of Platygonus vetus'
- 'Platygonus intermediatus belongs to Platygonus' according to J. W. Gidley 1921
- 'Platygonus intermedius belongs to Platygonus'
- 'Platygonus leptorhinus is a subjective synonym of Platygonus compressus'
- 'Platygonus leptorhinus belongs to Platygonus' according to Williston 1894
- 'Platygonus pearcei belongs to Platygonus'
- 'Platygonus texanus is a subjective synonym of Platygonus bicalcaratus'
- 'Platygonus vetus belongs to Platygonus'
- 'Plecotus belongs to Vespertilionae'
- 'Plecotus townsendii belongs to Plecotus'
- 'Plesiothomomys potomacensis is recombined as Thomomys potomacensis'
- 'Plesippus is a subjective synonym of Equus'
- 'Plesippus is a subjective synonym of Equus' according to Skinner et al. 1972
- 'Plesippus shoshonensis is a subjective synonym of Equus simplicidens'
- 'Pliauchenia (Megatylopus) was reranked as Megatylopus and belongs to Camelidae'
- 'Pliauchenia cochrani is recombined as Megatylopus cochrani'
- 'Pliauchenia spatula is recombined as Titanotylopus spatulus'
- 'Pliogeomys belongs to Geomyidae'
- 'Pliogeomys parvus belongs to Pliogeomys'
- 'Pliohippus francescana is a subjective synonym of Equus simplicidens'
- 'Pliohippus proversus is a subjective synonym of Equus simplicidens'
- 'Pliohippus proversus is a subjective synonym of Equus simplicidens' according to Skinner et al. 1972
- 'Pliolemmus belongs to Microtinae'
- 'Pliolemmus antiquus belongs to Pliolemmus'
- 'Pliomys belongs to Microtinae'
- 'Pliomys deeringensis belongs to Pliomys'
- 'Pliophenacomys belongs to Microtinae'
- 'Pliophenacomys finneyi belongs to Pliophenacomys'
- 'Pliophenacomys idahoensis is a subjective synonym of Ophiomys taylori'
- 'Pliophenacomys meadensis is recombined as Ophiomys meadensis'
- 'Pliophenacomys osborni belongs to Pliophenacomys'
- 'Pliopotamys belongs to Microtinae'
- 'Pliopotamys meadensis belongs to Pliopotamys'
- 'Podomys is a subjective synonym of Peromyscus'
- 'Podomys belongs to Cricetidae' according to Carleton 1980
- 'Porthocyon dubius is a subjective synonym of Borophagus diversidens'
- 'Porthocyon matthewi belongs to Porthocyon' according to Freudenberg 1910
- 'Porthocyon matthewi is a subjective synonym of Borophagus diversidens'
- 'Praeovibos belongs to Caprinae'
- 'Praeovibos priscus belongs to Praeovibos'
- 'Praotherium palatinum is a nomen dubium'
- 'Praotherium palatinum is recombined as Lagomys palatinus' according to Cope 1899
- 'Praotherium palatinum belongs to Praotherium' according to Cope 1871
- 'Pratilepus belongs to Leporinae'
- 'Pratilepus kansasensis belongs to Pratilepus'
- 'Predicrostonyx belongs to Microtinae'
- 'Predicrostonyx hopkinsi belongs to Predicrostonyx'
- 'Preptoceras mayfieldi is recombined as Soergelia mayfieldi'
- 'Preptoceras sinclairi is a subjective synonym of Euceratherium collinum'
- 'Procastoroides belongs to Castoridae'
- 'Procastoroides idahoensis belongs to Procastoroides'
- 'Procastoroides sweeti belongs to Procastoroides'
- 'Procyon belongs to Procyoninae'
- 'Procyon nanus is a subjective synonym of Procyon lotor'
- 'Procyon nanus belongs to Procyon' according to Simpson 1929
- 'Procyon priscus is a subjective synonym of Procyon lotor'
- 'Procyon rexroadensis belongs to Procyon'
- 'Procyon simus is a subjective synonym of Procyon lotor'
- 'Procyon simus belongs to Procyon' according to Gidley 1906
- 'Procyonidae belongs to Fissipedia'
- 'Procyoninae belongs to Procyonidae'
- 'Prodipodomys belongs to Dipodomyinae'
- 'Prodipodomys idahoensis belongs to Prodipodomys'
- 'Prodipodomys rexroadensis is a subjective synonym of Prodipodomys centralis'
- 'Proneofiber belongs to Microtinae'
- 'Proneofiber guildayi belongs to Proneofiber'
- 'Protocyon belongs to Canidae'
- 'Psammomys pinetorum is recombined as Microtus pinetorum'
- 'Psammomys pinetorum belongs to Psammomys' according to Le Conte 1830
- 'Pseudostoma castanops is recombined as Cratogeomys castanops'
- 'Pseudostoma castanops is recombined as Cratogeomys castanops' according to R. Russell and Baker 1955
- 'Pseudostoma castanops is recombined as Cratogeomys castanops' according to R. Russell and Baker 1955
- 'Pseudostoma castanops is recombined as Cratogeomys castanops' according to Miller and Kellogg 1955
- 'Pseudostoma castanops is recombined as Cratogeomys castanops' according to Nelson and Goldman 1934
- 'Pseudostoma castanops is recombined as Cratogeomys castanops' according to C. Merriam 1895
- 'Putorius nigripes is recombined as Mustela nigripes'
- 'Putorius rixosus is recombined as Mustela rixosa'
- 'Putorius vison is recombined as Mustela vison'
- 'Rangifer belongs to Odocoileinae'
- 'Rangifer fricki is recombined as Navahoceros fricki'
- 'Rangifer muscatinensis is a subjective synonym of Rangifer tarandus'
- 'Reithrodon megalotis is recombined as Reithrodontomys megalotis'
- 'Reithrodon megalotis belongs to Reithrodon' according to Baird 1858
- 'Reithrodon montanus is recombined as Reithrodontomys montanus'
- 'Reithrodon montanus belongs to Reithrodon' according to Baird 1855
- 'Reithrodontomys belongs to Cricetinae'
- 'Reithrodontomys fulvescens belongs to Reithrodontomys'
- 'Reithrodontomys pratincola belongs to Reithrodontomys'
- 'Reithrodontomys rexroadensis belongs to Reithrodontomys'
- 'Rhinolophus belongs to Rhinolophidae'
- 'Rhinonycteris belongs to Hipposideridae'
- 'Rhynchotherium belongs to Gomphotheriidae'
- 'Rhynchotherium falconeri is a subjective synonym of Rhynchotherium praecursor'
- 'Rupicapra americana is recombined as Oreamnos americanus' according to Hall and Kelson 1959
- 'Rupicapra americana is recombined as Oreamnos americanus' according to Hall and Kellogg 1955
- 'Rupicapra americana is recombined as Oreamnos americanus'
- 'Saiga belongs to Caprinae'
- 'Saiga ricei is a subjective synonym of Saiga tatarica'
- 'Sangamona belongs to Odocoileinae'
- 'Sangamona fugitiva belongs to Sangamona'
- 'Satherium belongs to Lutrinae'
- 'Scalops latimanus is recombined as Scapanus latimanus'
- 'Scalopus belongs to Talpidae'
- 'Scalopus breweri is recombined as Parascalops breweri'
- 'Scalopus breweri is recombined as Parascalops breweri' according to True 1894
- 'Scalopus breweri belongs to Scalopus' according to Bachman 1842
- 'Scapanus belongs to Talpidae'
- 'Scaphoceros tyrelli is a subjective synonym of Symbos cavifrons'
- 'Schistodelta sulcatus is a subjective synonym of Neofiber diluvianus'
- 'Schistodelta sulcatus is a subjective synonym of Neofiber diluvianus' according to Hibbard 1955
- 'Schistodelta sulcatus belongs to Schistodelta' according to Cope 1899
- 'Sciuridae belongs to Rodentia'
- 'Sciurus belongs to Sciuridae'
- 'Sciurus alleni belongs to Sciurus'
- 'Sciurus arizonensis belongs to Sciurus'
- 'Sciurus carolinensis belongs to Sciurus'
- 'Sciurus douglasii is recombined as Tamiasciurus douglasii'
- 'Sciurus douglasii belongs to Sciurus' according to Bachman 1839
- 'Sciurus hudsonicus is recombined as Tamiasciurus hudsonicus'
- 'Sciurus hudsonicus belongs to Sciurus' according to Erxleben 1777
- 'Sciurus lateralis belongs to Sciurus' according to Say 1823
- 'Sciurus lateralis is recombined as Spermophilus lateralis'
- 'Sciurus mexicanus is recombined as Spermophilus mexicanus'
- 'Sciurus mexicanus belongs to Sciurus' according to Erxleben 1877
- 'Sciurus niger belongs to Sciurus'
- 'Sciurus sabrinus is recombined as Glaucomys sabrinus'
- 'Sciurus sabrinus belongs to Sciurus' according to Shaw 1801
- 'Sciurus striatus is recombined as Tamias striatus'
- 'Sciurus striatus is recombined as Tamias striatus' according to Howell 1929
- 'Sciurus striatus is recombined as Tamias striatus' according to Allen 1891
- 'Sciurus striatus is recombined as Tamias striatus' according to Baird 1857
- 'Sciurus tenuidens is a subjective synonym of Tamiasciurus hudsonicus'
- 'Sciurus tenuidens belongs to Sciurus' according to Hay 1920
- 'Sciurus tridecemlineatus is recombined as Spermophilus tridecemlineatus'
- 'Sciurus tridecemlineatus belongs to Sciurus' according to Mitchell 1821
- 'Sciurus variegatus is recombined as Spermophilus variegatus'
- 'Sciurus variegatus belongs to Sciurus' according to Erxleben 1777
- 'Scotophilus belongs to Vespertilionidae'
- 'Scotophilus hesperus belongs to Scotophilus' according to H. Allen 1864
- 'Scotophilus hesperus is recombined as Pipistrellus hesperus'
- 'Sigmodon belongs to Cricetinae'
- 'Sigmodon bakeri belongs to Sigmodon'
- 'Sigmodon curtisi belongs to Sigmodon'
- 'Sigmodon hilli is a subjective synonym of Sigmodon medius'
- 'Sigmodon hispidus belongs to Sigmodon'
- 'Sigmodon hudspethensis belongs to Sigmodon'
- 'Sigmodon intermedius is a subjective synonym of Sigmodon medius'
- 'Sigmodon medius belongs to Sigmodon'
- 'Sigmodon minor is a subjective synonym of Sigmodon medius'
- 'Sigmodon ochrognathus belongs to Sigmodon'
- 'Simocyoninae belongs to Canidae'
- 'Simonycteris stocki is recombined as Histiotus stocki'
- 'Simonycteris stocki belongs to Simonycteris' according to Stirton 1931
- 'Smilodon belongs to Machairodontinae'
- 'Smilodon californicus is a subjective synonym of Smilodon fatalis'
- 'Smilodon gracilis belongs to Smilodon'
- 'Smilodon nebraskensis is a subjective synonym of Smilodon fatalis'
- 'Smilodon trinitiensis is a subjective synonym of Smilodon fatalis'
- 'Smilodontopsis is a subjective synonym of Smilodon'
- 'Smilodontopsis conardi is a subjective synonym of Smilodon fatalis'
- 'Smilodontopsis mooreheadi is a subjective synonym of Acinonyx trumani'
- 'Smilodontopsis troglodytes is a subjective synonym of Smilodon fatalis'
- 'Sminthosinis [misspelled as Sminthosinus] belongs to Grisoninae'
- 'Sminthosinis bowleri [misspelled as Sminthosinus bowleri] belongs to Sminthosinus'
- 'Soergelia belongs to Caprinae'
- 'Soergelia elisabethae is a subjective synonym of Soergelia mayfieldi'
- 'Soergelia elisabethae belongs to Soergelia' according to Schaub 1951
- 'Sorex belongs to Soricidae'
- 'Sorex aquaticus is recombined as Scalopus aquaticus'
- 'Sorex aquaticus is recombined as Scalopus aquaticus' according to Geoffroy 1803
- 'Sorex arcticus belongs to Sorex'
- 'Sorex brevicaudus is recombined as Blarina brevicauda'
- 'Sorex brevicaudus is recombined as Blarina brevicauda' according to Baird 1858
- 'Sorex brevicaudus belongs to Sorex' according to Say 1823
- 'Sorex cinereus belongs to Sorex'
- 'Sorex crawfordi is recombined as Notiosorex crawfordi'
- 'Sorex cristatus is recombined as Condylura cristata'
- 'Sorex cristatus is recombined as Condylura cristata' according to Illinger 1811
- 'Sorex cudahyensis belongs to Sorex'
- 'Sorex dispar belongs to Sorex'
- 'Sorex dixonensis is recombined as Planisorex dixonensis'
- 'Sorex franktownensis is a subjective synonym of Sorex cinereus'
- 'Sorex frankstounensis belongs to Sorex' according to Peterson 1926
- 'Sorex fumeus belongs to Sorex'
- 'Sorex hagermanensis belongs to Sorex'
- 'Sorex hoyi is recombined as Microsorex hoyi'
- 'Sorex kansasensis belongs to Sorex'
- 'Sorex leahyi belongs to Sorex'
- 'Sorex longirostris belongs to Sorex'
- 'Sorex megapalustris belongs to Sorex'
- 'Sorex meltoni belongs to Sorex'
- 'Sorex merriami belongs to Sorex'
- 'Sorex ornatus belongs to Sorex'
- 'Sorex palustris belongs to Sorex'
- 'Sorex parvus is recombined as Cryptotis parva'
- 'Sorex personatus is a subjective synonym of Sorex cinereus'
- 'Sorex personatus belongs to Sorex' according to Brown 1908
- 'Sorex powersi belongs to Sorex'
- 'Sorex rexroadensis belongs to Sorex'
- 'Sorex sandersi belongs to Sorex'
- 'Sorex saussurei belongs to Sorex'
- 'Sorex scottensis belongs to Sorex'
- 'Sorex taylori belongs to Sorex'
- 'Sorex trowbridgii belongs to Sorex'
- 'Sorex vagrans belongs to Sorex'
- 'Soricidae belongs to Insectivora'
- 'Spermophilus belongs to Sciuridae'
- 'Spermophilus armatus belongs to Spermophilus'
- 'Spermophilus boothi belongs to Spermophilus'
- 'Spermophilus gunnisoni belongs to Spermophilus' according to Baird 1855
- 'Spermophilus gunnisoni is recombined as Cynomys gunnisoni'
- 'Spermophilus gunnisoni is recombined as Cynomys gunnisoni' according to Hollister 1916
- 'Spermophilus gunnisoni is recombined as Cynomys gunnisoni' according to Baird 1858
- 'Spermophilus johnstoni [misspelled as Spermophilus johnsoni] belongs to Spermophilus'
- 'Spermophilus spilosoma belongs to Spermophilus'
- 'Spilogale belongs to Mephitinae'
- 'Spilogale gracilis belongs to Spilogale'
- 'Spilogale gracilis belongs to Spilogale' according to Mead 1968
- 'Spilogale marylandensis is a subjective synonym of Spilogale putorius'
- 'Spilogale pedroensis is a subjective synonym of Spilogale putorius'
- 'Spilogale pedroensis belongs to Spilogale' according to Gazin 1942
- 'Spilogale rexroadi belongs to Spilogale'
- 'Stegomastodon belongs to Gomphotheriidae'
- 'Stegomastodon arizonae is a subjective synonym of Stegomastodon mirificus'
- 'Stegomastodon arizonae belongs to Stegomastodon' according to Gidley 1926
- 'Stegomastodon primitivus is a subjective synonym of Stegomastodon mirificus'
- 'Stegomastodon primitivus belongs to Stegomastodon' according to Osborn 1936
- 'Stegomastodon rexroadensis is a subjective synonym of Stegomastodon mirificus'
- 'Stegomastodon texanus is a subjective synonym of Stegomastodon mirificus'
- 'Stehlinia belongs to Vespertilionidae'
- 'Stockoceros belongs to Antilocapridae'
- 'Sylvilagus belongs to Leporinae'
- 'Sylvilagus bensonensis is recombined as Aluralagus bensonensis'
- 'Sylvilagus leonensis belongs to Sylvilagus'
- 'Sylvilagus palustrellus is a subjective synonym of Sylvilagus leonensis'
- 'Sylvilagus palustrellus belongs to Sylvilagus' according to Gazin 1950
- 'Symbos belongs to Caprinae'
- 'Symbos australis belongs to Symbos' according to Brown 1908
- 'Symbos australis is a subjective synonym of Symbos cavifrons'
- 'Symbos convexifrons is a subjective synonym of Symbos cavifrons'
- 'Symbos promptus is a subjective synonym of Symbos cavifrons'
- 'Symmetrodontomys belongs to Cricetinae'
- 'Symmetrodontomys simplicidens belongs to Symmetrodontomys'
- 'Synaptomys belongs to Microtinae'
- 'Synaptomys anzaensis belongs to Synaptomys'
- 'Synaptomys australis belongs to Synaptomys'
- 'Synaptomys bunkeri belongs to Synaptomys'
- 'Synaptomys cooperi belongs to Synaptomys'
- 'Synaptomys kansasensis belongs to Synaptomys'
- 'Synaptomys landesi belongs to Synaptomys'
- 'Synaptomys meltoni belongs to Synaptomys'
- 'Synaptomys rinkeri belongs to Synaptomys'
- 'Synaptomys vetus belongs to Synaptomys'
- 'Tadarida belongs to Molossidae'
- 'Tadarida constantinei belongs to Tadarida'
- 'Talpini was reranked as the family Talpidae and belongs to Insectivora'
- 'Tamias belongs to Sciuridae'
- 'Tamias aristus belongs to Tamias'
- 'Tamias leucurus is recombined as Ammospermophilus leucurus'
- 'Tamias minimus is recombined as Eutamias minimus'
- 'Tamias minimus is recombined as Eutamias minimus' according to Howell 1929
- 'Tamias minimus is recombined as Eutamias minimus' according to Miller and Rehn 1901
- 'Tamias minimus belongs to Tamias' according to Bachman 1839
- 'Tamiasciurus belongs to Sciuridae'
- 'Tanupolama blancoensis is recombined as Hemiauchenia blancoensis'
- 'Tanupolama mirifica is recombined as Palaeolama mirifica'
- 'Tanupolama seymourensis is a subjective synonym of Hemiauchenia blancoensis'
- 'Taperidae is corrected as Tapiridae and belongs to Perissodactyla'
- 'Taphozous belongs to Emballonuridae'
- 'Tapirus belongs to Tapiridae'
- 'Tapirus copei belongs to Tapirus'
- 'Tapirus excelsus is a subjective synonym of Tapirus veroensis'
- 'Tapirus excelsus belongs to Tapirus' according to Simpson 1945
- 'Tapirus haysii is a subjective synonym of Tapirus copei'
- 'Tapirus haysii californicus is recombined as Tapirus californicus'
- 'Tapirus merriami belongs to Tapirus'
- 'Tapirus tennesseae is a subjective synonym of Tapirus veroensis'
- 'Tapirus tennesseae is a nomen dubium' according to Simpson 1945
- 'Tapirus veroensis belongs to Tapirus'
- 'Tatu bellus is recombined as Dasypus bellus'
- 'Tatu bellus belongs to Tatu' according to Simpson 1930
- 'Taurotragus americanus is a subjective synonym of Euceratherium collinum'
- 'Taxidea belongs to Melinae'
- 'Taxidea marylandica is a subjective synonym of Taxidea taxus'
- 'Taxidea marylandica is a subjective synonym of Taxidea taxus' according to Hall and Kelson 1959
- 'Taxidea robusta is a subjective synonym of Taxidea taxus'
- 'Taxidea sulcata is a subjective synonym of Taxidea taxus'
- 'Tayassuidae belongs to Artiodactyla'
- 'Teonoma spelaea is a subjective synonym of Neotoma cinerea'
- 'Teonoma spelaea belongs to Teonoma' according to Sinclair 1905
- 'Tetrameryx belongs to Antilocapridae'
- 'Tetrameryx conklingi is recombined as Stockoceros conklingi'
- 'Tetrameryx falkenbachi is recombined as Hayoceros falkenbachi'
- 'Tetrameryx irvingtonensis belongs to Tetrameryx'
- 'Tetrameryx knoxensis belongs to Tetrameryx'
- 'Tetrameryx mooseri belongs to Tetrameryx'
- 'Tetrameryx onusrosagris is recombined as Stockoceros onusrosagris'
- 'Tetrameryx tacubayensis belongs to Tetrameryx'
- 'Thomomys belongs to Geomyidae'
- 'Thomomys gidleyi belongs to Thomomys'
- 'Thomomys microdon belongs to Thomomys'
- 'Thomomys orientalis belongs to Thomomys'
- 'Tisisthenes belongs to Mustelinae'
- 'Tisisthenes parvus belongs to Tisisthenes'
- 'Titanotylopus belongs to Camelidae'
- 'Titanotylopus nebraskensis belongs to Titanotylopus'
- 'Tremarctinae belongs to Ursidae'
- 'Tremarctos belongs to Tremarctinae'
- 'Tremarctos mexicanus is a subjective synonym of Tremarctos floridanus'
- 'Tremarctotherium is a subjective synonym of Arctodus'
- 'Tremarctotherium belongs to ' according to Kraglievich 1926
- 'Trichechus belongs to Trichechidae'
- 'Trichechus manatus belongs to Trichechus'
- 'Trichecidae is corrected as Trichechidae and belongs to Sirenia'
- 'Trigonictis belongs to Grisoninae'
- 'Trigonictis kansasensis is a subjective synonym of Trigonictis idahoensis'
- 'Trucifelis is a subjective synonym of Smilodon'
- 'Trucifelis is a subjective synonym of Smilodon' according to Slaughter 1963
- 'Trucifelis is a subjective synonym of Smilodon' according to J. Merriam and Stock 1932
- 'Uncia mercerii is a subjective synonym of Smilodon gracilis'
- 'Uncia mercerii is a subjective synonym of Ischyrosmilus gracilis' according to Churcher 1984
- 'Uncia mercerii is recombined as Machaerodus mercerii' according to Slaughter 1960
- 'Uncia mercerii is recombined as Machaerodus mercerii' according to Matthew 1918
- 'Uncia mercerii is recombined as Smilodontopsis mercerii' according to Brown 1908
- 'Uncia mercerii is recombined as Smilodon mercerii' according to Cope 1899
- 'Urocyon belongs to Canidae'
- 'Urocyon atwaterensis is a subjective synonym of Urocyon cinereoargenteus'
- 'Urocyon minicephalus is a subjective synonym of Urocyon cinereoargenteus'
- 'Urocyon progressus belongs to Urocyon'
- 'Ursidae belongs to Fissipedia'
- 'Ursinae belongs to Ursidae'
- 'Ursus belongs to Ursinae'
- 'Ursus (Euarctos) vitabilis is a subjective synonym of Ursus americanus'
- 'Ursus abstrusus belongs to Ursus'
- 'Ursus americanus belongs to Ursus'
- 'Ursus amplidens is a subjective synonym of Ursus americanus'
- 'Ursus amplidens belongs to Ursus' according to Leidy 1853
- 'Ursus arctos belongs to Ursus'
- 'Ursus haplodon is a subjective synonym of Arctodus pristinus'
- 'Ursus haplodon is a subjective synonym of Arctodus pristinus' according to Kurten 1967
- 'Ursus horribilis belongs to Ursus' according to Ord 1815
- 'Ursus horribilis is a subjective synonym of Ursus arctos'
- 'Ursus lotor is recombined as Procyon lotor'
- 'Ursus luscus is a subjective synonym of Gulo gulo'
- 'Ursus luscus is a subjective synonym of Gulo gulo' according to Kurten and Rausch 1959
- 'Ursus luscus is recombined as Gulo luscus' according to Sabine 1823
- 'Ursus maritimus belongs to Ursus'
- 'Ursus optimus is a subjective synonym of Ursus americanus'
- 'Ursus procerus is a subjective synonym of Ursus arctos'
- 'Ursus taxus is recombined as Taxidea taxus'
- 'Urus priscus is recombined as Bison priscus'
- 'Urus priscus belongs to Urus' according to Bojanus 1827
- 'Vampyravus belongs to Phyllostomatidae'
- 'Vesperimus difficilis is recombined as Peromyscus difficilis'
- 'Vesperimus difficilis belongs to Vesperimus' according to Allen 1891
- 'Vespertiliavus belongs to Emballonuridae'
- 'Vespertilio belongs to Vespertilionidae'
- 'Vespertilio austroriparius is recombined as Myotis austroriparius'
- 'Vespertilio austroriparius belongs to Vespertilio' according to Rhoads 1897
- 'Vespertilio borealis is recombined as Lasiurus borealis'
- 'Vespertilio borealis belongs to Vespertilio' according to Muller 1776
- 'Vespertilio californicus is recombined as Myotis californicus'
- 'Vespertilio californicus belongs to Vespertilio' according to Audubon and Bachman 1842
- 'Vespertilio cinereus is recombined as Lasiurus cinereus'
- 'Vespertilio cinereus belongs to Vespertilio' according to Palisot de Beauvois 1796
- 'Vespertilio evotis is recombined as Myotis evotis'
- 'Vespertilio evotis belongs to Vespertilio' according to H. Allen 1864
- 'Vespertilio fuscus is recombined as Eptesicus fuscus'
- 'Eptesicus grandis is a subjective synonym of Eptesicus fuscus'
- 'Vespertilio humeralis is recombined as Nycticeius humeralis'
- 'Vespertilio humeralis belongs to Vespertilio' according to Rafinesque 1818
- 'Vespertilio keenii is recombined as Myotis keenii'
- 'Vespertilio keenii belongs to Vespertilio' according to C. Merriam 1895
- 'Vespertilio leibi is recombined as Myotis leibi'
- 'Vespertilio leibi belongs to Vespertilio' according to Audubon and Bachman 1842
- 'Vespertilio lucifugus belongs to Vespertilio' according to Le Conte 1831
- 'Vespertilio lucifugus is recombined as Myotis lucifugus'
- 'Vespertilio noctivagans is recombined as Lasionycteris noctivagans'
- 'Vespertilio noctivagans belongs to Vespertilio' according to Le Conte 1831
- 'Vespertilio pallidus is recombined as Antrozous pallidus'
- 'Vespertilio pallidus belongs to Vespertilio' according to Le Conte 1856
- 'Vespertilio rafinesquii is recombined as Plecotus rafinesquii'
- 'Vespertilio rafinesquii belongs to Vespertilio' according to Lesson 1818
- 'Vespertilio subflavus is recombined as Pipistrellus subflavus'
- 'Vespertilio subflavus belongs to Vespertilio' according to F. Cuvier 1832
- 'Vespertilio velifer is recombined as Myotis velifer'
- 'Vespertilio velifer belongs to Vespertilio' according to J. Allen 1890
- 'Vespertilio volans is recombined as Myotis volans'
- 'Vespertilio volans belongs to Vespertilio' according to H. Allen 1866
- 'Vespertilionae belongs to Vespertilionidae'
- 'Vespertilionidae belongs to Microchiroptera'
- 'Viverra mephitis is recombined as Mephitis mephitis'
- 'Viverra putorius is recombined as Spilogale putorius'
- 'Vulpes belongs to Canidae'
- 'Vulpes fulva is a subjective synonym of Vulpes vulpes' according to Churcher 1959
- 'Vulpes fulva belongs to Vulpes' according to Desmarest 1829
- 'Vulpes fulva is a subjective synonym of Vulpes vulpes'
- 'Vulpes littoralis is recombined as Urocyon littoralis'
- 'Vulpes littoralis belongs to Vulpes' according to Baird 1857
- 'Vulpes macrotis belongs to Vulpes'
- 'Vulpes macrotis belongs to Vulpes' according to C. Merriam 1888
- 'Vulpes palmaria is a subjective synonym of Vulpes vulpes'
- 'Vulpes palmaria belongs to Vulpes' according to Hay 1917
- 'Xenoglyptodon fredericensis is a subjective synonym of Glyptotherium arizonae'
- 'Xenoglyptodon fredericensis is recombined as Glyptodon fredericensis' according to Melton 1964
- 'Xenoglyptodon fredericensis belongs to Xenoglyptodon' according to Meade 1953
- 'Zalophus belongs to Otariidae'
- 'Zapodidae belongs to Rodentia'
- 'Zapus belongs to Zapodidae'
- 'Zapus adamsi is a subjective synonym of Zapus hudsonius'
- 'Zapus burti belongs to Zapus'
- 'Zapus insignis is recombined as Napaeozapus insignis' according to G. Miller 1900
- 'Zapus insignis belongs to Zapus' according to Miller 1891
- 'Zapus insignis is recombined as Napaeozapus insignis'
- 'Zapus insignis is recombined as Napaeozapus insignis' according to R. Anderson 1942
- 'Zapus insignis is recombined as Napaeozapus insignis' according to Prince 1941
- 'Zapus insignis is recombined as Napaeozapus insignis' according to C. Jackson 1919
- 'Zapus princeps belongs to Zapus'
- 'Zapus rinkeri belongs to Zapus'
- 'Zapus sandersi belongs to Zapus'