Opinions from R. A. Martin 1974

  • 'Aenocyon is a subjective synonym of Canis'
  • 'Allophaiomys is a subjective synonym of Phaiomys'
  • 'Allophaiomys pliocaenicus is recombined as Phaiomys pliocaenicus'
  • 'Arvicola didelta is recombined as Pitymys dideltus'
  • 'Arvicola didelta is a subjective synonym of Pedomys dideltus' according to Hibbard 1955
  • 'Arvicola didelta is recombined as Microtus dideltus' according to Cope 1899
  • 'Arvicola didelta is recombined as Microtus didelta' according to Cope 1896
  • 'Arvicola didelta belongs to Arvicola' according to Cope 1871
  • 'Arvicola involuta is recombined as Pitymys involutus'
  • 'Arvicola involuta is a subjective synonym of Pedomys dideltus' according to Hibbard 1955
  • 'Arvicola involuta belongs to Arvicola' according to Cope 1871
  • 'Arvicola speothen is a subjective synonym of Neodon'
  • 'Arvicola speothen is recombined as Microtus speothen' according to Hibbard 1955
  • 'Arvicola speothen is recombined as Microtus speothen' according to Cope 1899
  • 'Arvicola speothen is recombined as Microtus speothen' according to Cope 1896
  • 'Arvicola speothen belongs to Arvicola' according to Cope 1871
  • 'Canis armbrusteri is a subjective synonym of Canis lupus'
  • 'Canis armbrusteri belongs to Canis' according to Gidley 1913
  • 'Canis ayersi is a subjective synonym of Canis dirus'
  • 'Canis dirus belongs to Canis'
  • 'Canis furlongi is a subjective synonym of Canis lupus'
  • 'Canis milleri is a subjective synonym of Canis lupus'
  • 'Canis occidentalis is a subjective synonym of Canis lupus'
  • 'Canis occidentalis belongs to Canis' according to J. Merriam 1912
  • 'Hypudaeus ochrogaster is recombined as Pitymys ochrogaster'
  • 'Microtus llanensis is recombined as Pitymys llanensis'
  • 'Microtus paroperarius is recombined as Neodon paroperarius'
  • 'Microtus paroperarius belongs to Microtus' according to Hibbard 1944
  • 'Pedomys is a subjective synonym of Pitymys'
  • 'Pitymys belongs to Cricetidae'
  • 'Pitymys belongs to Cricetidae' according to Miller 1912
  • 'Pitymys aratai belongs to Pitymys'
  • 'Sigmodon hilli is a subjective synonym of Sigmodon minor' according to Cantwell 1969
  • 'Sigmodon hilli is a subjective synonym of Sigmodon minor'
  • 'Sigmodon hilli is a subjective synonym of Sigmodon minor' according to R. Martin 1970
  • 'Sigmodon intermedius is a subjective synonym of Sigmodon medius'
  • 'Sigmodon intermedius is a subjective synonym of Sigmodon medius' according to Hibbard 1972
  • 'Sigmodon intermedius is a subjective synonym of Sigmodon medius' according to R. Martin 1970
  • 'Sigmodon intermedius belongs to Sigmodon' according to Hibbard 1937