Opinions from C. Frick 1937
- 'Aftonius is a subjective synonym of Euceratherium'
- 'Aletomeryx lugni belongs to Aletomeryx'
- 'Aletomeryx marslandensis belongs to Aletomeryx'
- 'Allomeryx belongs to ' according to Sinclair 1905
- 'Allomeryx is a subjective synonym of Hypertragulus'
- 'Allomeryx planiceps is recombined as Hypertragulus planiceps'
- 'Barbouromeryx belongs to Dromomerycidae'
- 'Barbouromeryx (Probarbouromeryx) sweeti belongs to Barbouromeryx (Probarbouromeryx)'
- 'Barbouromeryx (Protobarbouromeryx) marslandensis belongs to Barbouromeryx (Protobarbouromeryx)'
- 'Barbouromeryx milleri belongs to Barbouromeryx'
- 'Barbouromeryx nebrascensis belongs to Barbouromeryx'
- 'Barbouromeryx pawniensis belongs to Barbouromeryx'
- 'Barbouromeryx pseudonebrascensis belongs to Barbouromeryx'
- 'Barbouromeryx submilleri belongs to Barbouromeryx'
- 'Barbouromeryx supernebrascensis belongs to Barbouromeryx'
- 'Bison alaskensis belongs to Bison'
- 'Bison alaskensis is a subjective synonym of Bison crassicornis' according to F. Lucas 1899
- 'Bison alaskensis belongs to Bison' according to Rhoads 1897
- 'Bison appalachicolus belongs to Bison' according to Rhoads 1895
- 'Bison appalachicolus is recombined as Ovibos appalachicolus'
- 'Bison appalachicolus is recombined as Ovibos appalachicolus' according to Hay 1923
- 'Bison appalachicolus is recombined as Ovibos appalachicolus' according to Rhaods 1897
- 'Bison crassicornis belongs to Bison'
- 'Bison crassicornis is recombined as Superbison crassicornis' according to Nobis 1930
- 'Bison crassicornis is a subjective synonym of Bison antiquus' according to Allen 1876
- 'Bison crassicornis belongs to Bison' according to Richardson 1854
- 'Bison figginsi belongs to Bison'
- 'Bison francisi belongs to Bison'
- 'Bison occidentalis belongs to Bison'
- 'Bison occidentalis is recombined as Stelabison occidentalis' according to Figgins 1933
- 'Bison occidentalis belongs to Bison' according to F. Lucas 1898
- 'Bison taylori belongs to Bison'
- 'Bison taylori is recombined as Stelabison taylori' according to Figgins 1933
- 'Bison taylori belongs to Bison' according to Hay and Cook 1928
- 'Blastomeryx advena is recombined as Parablastomeryx advena'
- 'Blastomeryx antilopinus is recombined as Dromomeryx antilopinus'
- 'Blastomeryx antilopinus is recombined as Dromomeryx antilopinus' according to Scott 1913
- 'Blastomeryx borealis is recombined as Dromomeryx borealis'
- 'Blastomeryx francesca belongs to Blastomeryx'
- 'Blastomeryx francescita belongs to Blastomeryx'
- 'Blastomeryx marshi is recombined as Aletomeryx marshi'
- 'Blastomeryx medius is a subjective synonym of Blastomeryx gemmifer'
- 'Blastomeryx mefferdi belongs to Blastomeryx'
- 'Blastomeryx olcotti is recombined as Parablastomeryx olcotti'
- 'Blastomeryx primus is recombined as Parablastomeryx primus'
- 'Blastomeryx riparius is recombined as Sinclairomeryx riparius'
- 'Blastomeryx scotti is recombined as Aletomeryx scotti'
- 'Blastomeryx vigoratus is recombined as Longirostromeryx vigoratus'
- 'Blastomeryx wellsi is recombined as Longirostromeryx wellsi'
- 'Bos arizonica is recombined as Bison arizonica'
- 'Bos arizonica belongs to Bos' according to Blake 1898
- 'Bos bombifrons is recombined as Bootherium bombifrons' according to Hay 1914
- 'Bos bombifrons is recombined as Bootherium bombifrons' according to Osgood 1905
- 'Bos bombifrons is recombined as Bootherium bombifrons' according to Leidy 1852
- 'Bos bombifrons belongs to Bos' according to Harlan 1825
- 'Bos bombifrons is recombined as Bootherium bombifrons'
- 'Bos bombifrons is recombined as Bootherium bombifrons' according to Peterson 1926
- 'Bos bunnelli belongs to Bos'
- 'Bos crampianus is recombined as Bison crampianus'
- 'Bos crampianus belongs to Bos' according to Cope 1894
- 'Bos latifrons is recombined as Bison latifrons'
- 'Bos latifrons is recombined as Bison latifrons' according to Cook 1928
- 'Bos latifrons is recombined as Bison latifrons' according to F. Lucas 1899
- 'Bos latifrons is recombined as Bison latifrons' according to Allen 1876
- 'Bos latifrons is recombined as Bison latifrons' according to Leidy 1852
- 'Bos latifrons belongs to Bos' according to Harlan 1825
- 'Bos moschatus is recombined as Ovibos moschatus'
- 'Bos moschatus is recombined as Ovibos moschatus' according to Blainville 1816
- 'Bos moschatus belongs to Bos' according to Zimmermann 1780
- 'Calops is a subjective synonym of Protoceras'
- 'Calops consors is recombined as Protoceras consors'
- 'Calops consors belongs to Calops' according to Marsh 1897
- 'Calops cristatus is recombined as Protoceras cristatus'
- 'Capra tatarica is recombined as Saiga tatarica'
- 'Capra tatarica is recombined as Saiga tatarica' according to Gray 1843
- 'Capra tatarica belongs to Capra' according to Linnaeus 1758
- 'Capromeryx gidleyi belongs to Capromeryx'
- 'Capromeryx texanus is recombined as Texoceros texanus'
- 'Cariacus dolichopsis is recombined as Odocoileus dolichopsis'
- 'Cariacus ensifer is recombined as Odocoileus ensifer'
- 'Cariacus ensifer belongs to Cariacus' according to Cope 1889
- 'Cervalces alaskensis belongs to Cervalces'
- 'Cervavus sinclairi is a subjective synonym of Cranioceras unicornis'
- 'Cervus aguangae belongs to Cervus'
- 'Cervus lascrucensis belongs to Cervus'
- 'Cervus scotti is recombined as Cervalces scotti'
- 'Cervus scotti is recombined as Cervalces scotti' according to Hay 1914
- 'Cervus scotti is recombined as Cervalces scotti' according to Scott 1913
- 'Cervus warreni is recombined as Meryceros warreni'
- 'Cervus warreni is a subjective synonym of Merycodus necatus' according to Forsten 1970
- 'Cervus whitneyi is recombined as Odocoileus whitneyi'
- 'Cosorycinae belongs to Antilocapridae'
- 'Cosoryx belongs to Cosorycinae'
- 'Cosoryx (Paracosoryx) belongs to Cosoryx'
- 'Cosoryx (Paracosoryx) burgensis belongs to Cosoryx (Paracosoryx)'
- 'Cosoryx (Paracosoryx) furlongi belongs to Cosoryx (Paracosoryx)'
- 'Cosoryx (Paracosoryx) wilsoni belongs to Cosoryx (Paracosoryx)'
- 'Cosoryx (Subcosoryx) belongs to Cosoryx'
- 'Cosoryx (Subcosoryx) cerroensis belongs to Cosoryx (Subcosoryx)'
- 'Cosoryx (Subparacosoryx) belongs to Cosoryx'
- 'Cosoryx (Subparacosoryx) savaronis belongs to Cosoryx (Subparacosoryx)'
- 'Cosoryx agilis is a subjective synonym of Cosoryx furcatus'
- 'Cosoryx alticornis is recombined as Cosoryx (Paracosoryx) alticornis'
- 'Cosoryx burgensis belongs to Cosoryx'
- 'Cosoryx dawesensis belongs to Cosoryx'
- 'Cosoryx furcatus belongs to Cosoryx'
- 'Cosoryx furcatus mooki belongs to Cosoryx furcatus'
- 'Cosoryx furcatus stembergi belongs to Cosoryx furcatus'
- 'Cosoryx furcatus sternbergi belongs to Cosoryx furcatus'
- 'Cosoryx ilfonsensis belongs to Cosoryx'
- 'Cosoryx ramosus is recombined as Ramoceros ramosus'
- 'Cosoryx teres is recombined as Cranioceras teres'
- 'Cosoryx teres is recombined as Palaeomeryx teres' according to Gidley 1907
- 'Cranioceras (Procranioceras) skinneri belongs to Cranioceras (Procranioceras)'
- 'Cranioceras clarendonensis belongs to Cranioceras'
- 'Cranioceras dakotensis belongs to Cranioceras'
- 'Cranioceras granti belongs to Cranioceras'
- 'Cranioceras kinseyi belongs to Cranioceras'
- 'Cranioceras mefferdi belongs to Cranioceras'
- 'Cranioceras pawniensis belongs to Cranioceras'
- 'Dicrocerus tehuanus is a nomen dubium'
- 'Dicrocerus tehuanus belongs to Dicrocerus' according to Cope 1877
- 'Dicrocerus trilateralis is a nomen dubium'
- 'Drepanomeryx (Matthomeryx) matthewi belongs to Drepanomeryx (Matthomeryx)'
- 'Dromomeryx (Subdromomeryx) belongs to Dromomeryx'
- 'Dromomeryx (Subdromomeryx) scotti belongs to Dromomeryx (Subdromomeryx)'
- 'Dromomeryx (Subdromomeryx) wilsoni belongs to Dromomeryx (Subdromomeryx)'
- 'Dromomeryx parvus belongs to Dromomeryx' according to Cook 1922
- 'Dromomeryx parvus is recombined as Bouromeryx parvus'
- 'Dromomeryx pawniensis belongs to Dromomeryx'
- 'Dromomeryx texanus is recombined as Cranioceras texanus'
- 'Dromomeryx trigonocorneus is recombined as Barbouromeryx (Barbouromeryx) trigonocorneus'
- 'Haplocerus is a subjective synonym of Oreamnos'
- 'Haplocerus belongs to ' according to Wagner 1844
- 'Hypertragulus dakotensis belongs to Hypertragulus'
- 'Hypertragulus minor belongs to Hypertragulus'
- 'Hypertragulus ordinatus is recombined as Nanotragulus ordinatus'
- 'Hypertragulus ordinatus is recombined as Nanotragulus ordinatus' according to Schlaikjer 1935
- 'Hypisodus ringens is a subjective synonym of Hypisodus minimus'
- 'Leptauchenia calcarata is recombined as Hypertragulus calcaratus'
- 'Leptauchenia minima is recombined as Hypisodus minimus' according to Matthew 1901
- 'Leptauchenia minima is recombined as Hypisodus minimus'
- 'Leptauchenia minima is recombined as Hypisodus minimus' according to Matthew 1902
- 'Leptomeryx drummondanus is a subjective synonym of Leptomeryx transmontanus'
- 'Leptomeryx drummondanus belongs to Leptomeryx' according to Matthew 1926
- 'Leptomeryx minimus belongs to Leptomeryx'
- 'Leptomeryx transmontanus belongs to Leptomeryx'
- 'Leptotragulus profectus is recombined as Eotylopus profectus'
- 'Liops zuniensis is recombined as Ovibos zuniensis'
- 'Liops zuniensis is recombined as Gidleya zuniensis' according to Cossmann 1907
- 'Longirostromeryx belongs to Moschidae'
- 'Longirostromeryx blicki belongs to Longirostromeryx'
- 'Longirostromeryx clarendonensis belongs to Longirostromeryx'
- 'Longirostromeryx merriami belongs to Longirostromeryx'
- 'Longirostromeryx novomexicanus belongs to Longirostromeryx'
- 'Longirostromeryx serpentis belongs to Longirostromeryx'
- 'Mazama dorsata is a subjective synonym of Oreamnos montanus'
- 'Mazama dorsata belongs to Mazama' according to Rafinesque 1817
- 'Meryceros belongs to Antilocapridae'
- 'Meryceros (Submeryceros) belongs to Meryceros'
- 'Meryceros (Submeryceros) crucianus belongs to Meryceros (Submeryceros)'
- 'Meryceros crucensis belongs to Meryceros'
- 'Meryceros joraki belongs to Meryceros'
- 'Meryceros major belongs to Meryceros'
- 'Meryceros minimus belongs to Meryceros'
- 'Meryceros minor belongs to Meryceros'
- 'Meryceros nenzelensis belongs to Meryceros'
- 'Meryceros warreni johnsoni belongs to Meryceros warreni'
- 'Merycodus is a nomen dubium'
- 'Merycodus is a subjective synonym of Dicrocerus' according to Cope 1877
- 'Merycodus altidens is recombined as Texoceros altidens'
- 'Merycodus coronatus is recombined as Ramoceros (Merriamoceros) coronatus'
- 'Merycodus gemmifer is recombined as Blastomeryx gemmifer'
- 'Merycodus grandis is a nomen dubium'
- 'Merycodus hookwayi is recombined as Meryceros hookwayi'
- 'Merycodus loxocerus is recombined as Cosoryx (Paracosoryx) loxocerus'
- 'Merycodus necatus is a nomen dubium'
- 'Merycodus necatus is recombined as Dicrocerus necatus' according to Cope 1877
- 'Merycodus necatus sabulonis is recombined as Cosoryx (Paracosoryx) sabulonis'
- 'Merycodus nevadensis is recombined as Cosoryx (Paracosoryx) nevadensis'
- 'Merycodus nevadensis belongs to Merycodus' according to J. Merriam 1911
- 'Merycodus osborni is recombined as Ramoceros osborni'
- 'Nanotragulus albanensis belongs to Nanotragulus'
- 'Nanotragulus lulli belongs to Nanotragulus'
- 'Odocoileus cascensis belongs to Odocoileus'
- 'Odocoileus cooki belongs to Odocoileus'
- 'Odocoileus sheridanus belongs to Odocoileus'
- 'Osbornoceros belongs to Antilocapridae'
- 'Osbornoceros osborni belongs to Osbornoceros'
- 'Ovibos cavifrons is recombined as Symbos cavifrons' according to Allen 1913
- 'Ovibos cavifrons is recombined as Symbos cavifrons' according to Hay 1912
- 'Ovibos cavifrons is recombined as Scaphoceros cavifrons' according to Osgood 1905
- 'Ovibos cavifrons is recombined as Bootherium cavifrons' according to Leidy 1852
- 'Ovibos cavifrons belongs to Ovibos' according to Leidy 1852
- 'Ovibos cavifrons is recombined as Symbos cavifrons'
- 'Ovibos cavifrons is recombined as Symbos cavifrons' according to Barbour 1931
- 'Ovibos cavifrons is recombined as Symbos cavifrons' according to Hay 1930
- 'Ovibos cavifrons is recombined as Symbos cavifrons' according to Hay 1914
- 'Ovibos giganteus belongs to Ovibos'
- 'Ovis dorshi belongs to Ovis'
- 'Ovis montanus is recombined as Oreamnos montanus'
- 'Ovis montanus is recombined as Haplocerus montanus' according to Sinclair 1904
- 'Ovis montanus is recombined as Haplocerus montanus' according to Wagner 1844
- 'Ovis montanus is recombined as Aplocerus montanus' according to Sinclair 1905
- 'Ovis montanus is recombined as Aplocerus montanus' according to Hamilton-Smith 1827
- 'Ovis montanus belongs to Ovis' according to Ord 1815
- 'Palaeomeryx americanus is recombined as Barbouromeryx americanus'
- 'Palaeomeryx madisonius is recombined as Barbouromeryx madisonius'
- 'Parablastomeryx belongs to Moschidae'
- 'Parablastomeryx falkenbachi is recombined as Pseudoblastomeryx falkenbachi'
- 'Parablastomeryx galushi belongs to Parablastomeryx'
- 'Parablastomeryx gregorii belongs to Parablastomeryx'
- 'Parablastomeryx marsa belongs to Parablastomeryx'
- 'Parablastomeryx schultzi belongs to Parablastomeryx'
- 'Parablastomeryx scotti belongs to Parablastomeryx'
- 'Paratoceras belongs to Protoceratidae'
- 'Paratoceras macadamsi belongs to Paratoceras'
- 'Plioceros belongs to Antilocapridae'
- 'Plioceros blicki belongs to Plioceros'
- 'Plioceros dehlini belongs to Plioceros'
- 'Plioceros floblairi belongs to Plioceros'
- 'Preptoceras belongs to ' according to Furlong 1905
- 'Preptoceras is a subjective synonym of Euceratherium'
- 'Preptoceras mayfieldi is recombined as Euceratherium mayfieldi'
- 'Preptoceras sinclairi is recombined as Euceratherium sinclairi'
- 'Preptoceras sinclairi belongs to Preptoceras' according to Furlong 1905
- 'Procoileus edensis belongs to Procoileus'
- 'Pseudoceras belongs to Gelocidae'
- 'Pseudoceras klausi belongs to Pseudoceras'
- 'Pseudoceras potteri belongs to Pseudoceras'
- 'Pseudoceras skinneri belongs to Pseudoceras'
- 'Pseudoceras wilsoni belongs to Pseudoceras'
- 'Rakomeryx belongs to Dromomerycidae'
- 'Rakomeryx gazini belongs to Rakomeryx'
- 'Rakomeryx jorakianus belongs to Rakomeryx'
- 'Rakomeryx raki belongs to Rakomeryx'
- 'Rakomeryx yermonensis belongs to Rakomeryx'
- 'Rakomylus belongs to Camelidae'
- 'Rakomylus raki belongs to Rakomylus'
- 'Ramoceros belongs to Ramocerotinae'
- 'Ramoceros (Merriamoceros) belongs to Ramoceros'
- 'Ramoceros (Paramoceros) belongs to Ramoceros'
- 'Ramoceros (Paramoceros) brevicornis belongs to Ramoceros (Paramoceros)'
- 'Ramoceros (Paramoceros) howardae belongs to Ramoceros (Paramoceros)'
- 'Ramoceros (Paramoceros) kansanus belongs to Ramoceros (Paramoceros)'
- 'Ramoceros (Paramoceros) marthae belongs to Ramoceros (Paramoceros)'
- 'Ramoceros (Paramoceros) palmatus belongs to Ramoceros (Paramoceros)'
- 'Ramoceros hitchcockensis belongs to Ramoceros'
- 'Ramoceros ramosus quadratus belongs to Ramoceros ramosus'
- 'Ramocerotinae belongs to Antilocapridae'
- 'Rupicapra americana is a subjective synonym of Oreamnos montanus'
- 'Rupicapra americana belongs to Rupicapra' according to Blainville 1816
- 'Saiga ricei belongs to Saiga'
- 'Scaphoceros tyrelli is recombined as Symbos tyrelli'
- 'Scaphoceros tyrelli is recombined as Symbos tyrelli' according to Hay 1914
- 'Scaphoceros tyrelli is recombined as Symbos tyrelli' according to Gilmore 1908
- 'Scaphoceros tyrelli is recombined as Symbos tyrelli' according to Gilmore 1908
- 'Scaphoceros tyrelli is recombined as Symbos tyrelli' according to Gidley 1908
- 'Scaphoceros tyrelli is recombined as Symbos tyrelli' according to Osgood 1905
- 'Scaphoceros tyrelli belongs to Scaphoceros' according to Osgood 1905
- 'Simobison belongs to ' according to Hay and Cook 1930
- 'Simobison is a subjective synonym of Bison'
- 'Sinclairomeryx belongs to Dromomerycidae'
- 'Sinclairomeryx sinclairi belongs to Sinclairomeryx'
- 'Sinclairomeryx tedi belongs to Sinclairomeryx'
- 'Stelabison is a subjective synonym of Bison'
- 'Stelabison belongs to ' according to Figgins 1933
- 'Symbos convexifrons is a subjective synonym of Symbos cavifrons'
- 'Symbos convexifrons belongs to Symbos' according to Barbour 1934
- 'Symbos promptus is a subjective synonym of Symbos cavifrons'
- 'Synthetoceras (Prosynthetoceras) belongs to Synthetoceras'
- 'Synthetoceras francisi belongs to Synthetoceras'
- 'Synthetoceras rileyi belongs to Synthetoceras'
- 'Synthetoceras siouxensis belongs to Synthetoceras'
- 'Taurotragus belongs to Bovidae'
- 'Taurotragus americanus is recombined as Euceratherium americanum'
- 'Taurotragus americanus belongs to Taurotragus' according to Gidley 1913
- 'Tetrameryx conklingi is recombined as Stockoceros conklingi'
- 'Tetrameryx conklingi belongs to Tetrameryx' according to Stock 1930
- 'Tetrameryx falkenbachi belongs to Tetrameryx'
- 'Tetrameryx onusrosagris is recombined as Stockoceros onusrosagris'
- 'Tetrameryx onusrosagris belongs to Tetrameryx' according to Roosevelt and Burden 1934
- 'Texoceros belongs to Antilocapridae'
- 'Texoceros edensis belongs to Texoceros'
- 'Texoceros guymonensis belongs to Texoceros'
- 'Texoceros minorei belongs to Texoceros'
- 'Texoceros vaughani belongs to Texoceros'
- 'Trimerodus cedrensis is a subjective synonym of Leptomeryx evansi'
- 'Yumaceras belongs to '
- 'Yumaceras falkenbachi belongs to Yumaceras'
- 'Yumaceras figginsi belongs to Yumaceras'