Opinions from W. W. Korth 2000
- 'Alphagaulus belongs to Mylagaulidae'
- 'Alphagaulus tedfordi belongs to Alphagaulus'
- 'Ceratogaulus belongs to Mylagaulidae'
- 'Ceratogaulus anecdotus belongs to Ceratogaulus'
- 'Epigaulus is a subjective synonym of Ceratogaulus'
- 'Epigaulus belongs to ' according to Gidley 1907
- 'Epigaulus hatcheri is recombined as Ceratogaulus hatcheri'
- 'Epigaulus hatcheri belongs to Epigaulus' according to Gidley 1907
- 'Epigaulus minor is recombined as Ceratogaulus minor'
- 'Mesogaulus praecursor is a subjective synonym of Mesogaulus paniensis'
- 'Mesogaulus praecursor is a subjective synonym of Mesogaulus paniensis' according to R. Wilson 1960
- 'Mylagaulus cambridgensis is recombined as Pterogaulus cambridgensis'
- 'Mylagaulus douglassi is recombined as Alphagaulus douglassi'
- 'Mylagaulus laevis is recombined as Pterogaulus laevis'
- 'Mylagaulus laevis belongs to Mylagaulus' according to Matthew 1902
- 'Mylagaulus monodon is recombined as Umbogaulus monodon'
- 'Mylagaulus monodon belongs to Mylagaulus' according to Cope 1881
- 'Mylagaulus novellus is recombined as Galbreathia novellus'
- 'Mylagaulus paniensis is recombined as Mesogaulus paniensis'
- 'Mylagaulus pristinus is recombined as Alphagaulus pristinus'
- 'Mylagaulus proximus is a subjective synonym of Alphagaulus pristinus'
- 'Mylagaulus proximus is a subjective synonym of Mesogaulus paniensis' according to Sutton 1977
- 'Mylagaulus vetus is recombined as Alphagaulus vetus'
- 'Protohippus medius is a nomen dubium'
- 'Protohippus medius is a subjective synonym of Merychippus insignis' according to Hay 1930
- 'Protohippus medius is a subjective synonym of Merychippus insignis' according to Hay 1926
- 'Protohippus medius is a subjective synonym of Merychippus insignis' according to Hay 1902
- 'Pterogaulus belongs to Mylagaulidae'
- 'Pterogaulus barbarellae belongs to Pterogaulus'
- 'Umbogaulus belongs to Mylagaulidae'
- 'Umbogaulus galushai belongs to Umbogaulus'