Opinions from G. G. Simpson 1935
- 'Aphronorus belongs to Pantolestidae'
- 'Aphronorus fraudator belongs to Aphronorus'
- 'Chriacus pusillus belongs to Chriacus'
- 'Claenodon vecordensis belongs to Claenodon'
- 'Deuterogonodon belongs to Arctocyonidae'
- 'Didymictis microlestes belongs to Didymictis'
- 'Didymictis tenuis belongs to Didymictis'
- 'Ectypodus grangeri belongs to Ectypodus'
- 'Ectypodus russelli belongs to Ectypodus'
- 'Ectypodus silberlingi belongs to Ectypodus'
- 'Ellipsodon aquilonius belongs to Ellipsodon'
- 'Emperodon belongs to '
- 'Emperodon acmeodontoides belongs to Emperodon'
- 'Eudaemonema belongs to Plagiomenidae'
- 'Eudaemonema cuspidata belongs to Eudaemonema'
- 'Gelastops belongs to Cimolestidae'
- 'Gelastops parcus belongs to Gelastops'
- 'Gidleyina belongs to '
- 'Haplaletes belongs to Hyopsodontidae'
- 'Haplaletes disceptatrix belongs to Haplaletes'
- 'Ictidopappus belongs to Carnivora'
- 'Ictidopappus mustelinus belongs to Ictidopappus'
- 'Leipsanolestes is a subjective synonym of Leptacodon'
- 'Leipsanolestes siegfriedti is recombined as Leptacodon siegfriedti'
- 'Leptacodon ladae belongs to Leptacodon'
- 'Leptacodon munusculum belongs to Leptacodon'
- 'Litaletes belongs to Mioclaenidae'
- 'Litaletes disjunctus belongs to Litaletes'
- 'Litomylus belongs to Hyopsodontidae'
- 'Litomylus dissentaneus belongs to Litomylus'
- 'Metachriacus belongs to '
- 'Metachriacus provocator belongs to Metachriacus'
- 'Metachriacus punitor belongs to Metachriacus'
- 'Mioclaenus ferox is recombined as Claenodon ferox'
- 'Mioclaenus sectorius is recombined as Anisonchus sectorius'
- 'Mioclaenus sectorius is recombined as Anisonchus sectorius' according to Cope 1884
- 'Mioclaenus sectorius belongs to Mioclaenus' according to Cope 1881
- 'Neoclaenodon is a subjective synonym of Claenodon'
- 'Neoclaenodon latidens is recombined as Claenodon latidens'
- 'Neoclaenodon montanensis is recombined as Claenodon montanensis'
- 'Neoclaenodon silberlingi is recombined as Claenodon silberlingi'
- 'Palaechthon minor is recombined as Palenochtha minor'
- 'Palaechthon minor belongs to Palaechthon' according to Gidley 1923
- 'Palaeosinopa diluculi belongs to Palaeosinopa'
- 'Palenochtha belongs to Palaechthonidae'
- 'Pantolambda intermedius belongs to Pantolambda'
- 'Parectypodus jepseni belongs to Parectypodus'
- 'Prodiacodon concordiarcensis belongs to Prodiacodon'
- 'Prothryptacodon belongs to Arctocyonidae'
- 'Prothryptacodon furens belongs to Prothryptacodon'
- 'Ptilodus admirabilis is a subjective synonym of Ptilodus montanus'
- 'Ptilodus douglassi belongs to Ptilodus'
- 'Ptilodus gidleyi belongs to Ptilodus'
- 'Ptilodus sinclairi belongs to Ptilodus'
- 'Spanoxyodon belongs to Arctocyonidae'
- 'Spanoxyodon latrunculus belongs to Spanoxyodon'
- 'Stilpnodon belongs to Gypsonictopidae'
- 'Stilpnodon simplicidens belongs to Stilpnodon'
- 'Tetraclaenodon belongs to Phenacodontidae'
- 'Tetraclaenodon is a subjective synonym of Euprotogonia' according to Matthew 1897
- 'Tetraclaenodon superior belongs to Tetraclaenodon'