Opinions from W. A. Clemens 1966
- 'Alphadon lulli belongs to Alphadon'
- 'Alphadon rhaister belongs to Alphadon'
- 'Cimolestes curtus is a subjective synonym of Didelphodon vorax'
- 'Cimolestes cutleri is recombined as Eodelphis cutleri'
- 'Diaphorodon is a subjective synonym of Didelphodon'
- 'Didelphodon ferox is a subjective synonym of Didelphodon vorax'
- 'Didelphodon ferox is recombined as Didelphops ferox' according to Marsh 1889
- 'Didelphodon vorax belongs to Didelphodon'
- 'Didelphodon vorax is recombined as Didelphops vorax' according to Marsh 1889
- 'Ectoconodon is a subjective synonym of Didelphodon'
- 'Ectoconodon montanensis is a nomen dubium'
- 'Ectoconodon petersoni is a subjective synonym of Didelphodon vorax'
- 'Ectoconodon petersoni belongs to Ectoconodon' according to Osborn 1898
- 'Eodelphis browni belongs to Eodelphis'
- 'Glasbius belongs to Glasbiidae'
- 'Glasbius intricatus belongs to Glasbius'
- 'Pediomys cooki belongs to Pediomys'
- 'Pediomys florencae belongs to Pediomys'
- 'Pediomys krejcii belongs to Pediomys'
- 'Protolambda is a subjective synonym of Pediomys'
- 'Protolambda hatcheri is recombined as Pediomys hatcheri'
- 'Protolambda hatcheri belongs to Protolambda' according to Osborn 1898
- 'Stagodon is a subjective synonym of Didelphodon'
- 'Stagodon nitor is a subjective synonym of Didelphodon vorax'
- 'Stagodon tumidus is a nomen oblitum'
- 'Stagodon tumidus belongs to Stagodon' according to Marsh 1889
- 'Stagodon validus is a subjective synonym of Didelphodon vorax'
- 'Synconodon is a subjective synonym of Pediomys'
- 'Synconodon sexicuspis is a subjective synonym of Pediomys hatcheri'
- 'Synconodon sexicuspis belongs to Synconodon' according to Osborn 1898
- 'Telacodon praestans is a nomen dubium'