Opinions from T. E. Williamson et al. 2012
- 'Adelodelphys belongs to Metatheria'
- 'Aenigmadelphys belongs to Metatheria'
- 'Albertatherium belongs to Metatheria'
- 'Alphadon belongs to Metatheria'
- 'Alphadon jasoni is recombined as Nortedelphys jasoni'
- 'Anchistodelphys belongs to Metatheria'
- 'Apistodon belongs to Metatheria'
- 'Aquiladelphis belongs to Pediomyidae'
- 'Armintodelphys belongs to Peradectidae'
- 'Asiatherium belongs to Metatheria'
- 'Atokatheridium belongs to Deltatheroida'
- 'Bistius belongs to Metatheria'
- 'Copedelphys belongs to Herpetotheriidae'
- 'Dakotadens belongs to Metatheria'
- 'Deltatheroides belongs to Deltatheroida'
- 'Didelphodon belongs to Stagodontidae'
- 'Ectocentrocristus belongs to Herpetotheriidae'
- 'Eoalphadon belongs to Metatheria'
- 'Eodelphis belongs to Stagodontidae'
- 'Glasbius belongs to Metatheria'
- 'Hatcheritherium belongs to Metatheria'
- 'Herpetotheriidae was reranked as a unranked clade and belongs to Metatheria'
- 'Herpetotherium belongs to Herpetotheriidae'
- 'Iqualadelphis belongs to Pediomyidae'
- 'Iugomortiferum belongs to Metatheria'
- 'Kokopellia belongs to Metatheria'
- 'Leptalestes belongs to Pediomyidae'
- 'Maastrichtidelphys belongs to Peradectidae'
- 'Mimoperadectes belongs to Peradectidae'
- 'Mimoperadectes sowasheensis is a subjective synonym of Mimoperadectes houdei'
- 'Nanocuris belongs to Deltatheroida'
- 'Nortedelphys belongs to Metatheria'
- 'Nortedelphys intermedius is a subjective synonym of Alphadon jasoni'
- 'Oklatheridium belongs to Deltatheroida'
- 'Pariadens belongs to Stagodontidae'
- 'Pediomyinae was reranked as the unranked clade Pediomyidae and belongs to Peradectidae'
- 'Pediomys belongs to Pediomyidae'
- 'Peradectes belongs to Peradectidae'
- 'Peradectes minor belongs to Peradectes'
- 'Peradectes pauli is a subjective synonym of Peradectes elegans'
- 'Peradectidae was reranked as a unranked clade and belongs to Metatheria'
- 'Protalphadon belongs to Metatheria'
- 'Protolambda belongs to Pediomyidae'
- 'Pucadelphys belongs to Peradectidae'
- 'Roberthoffstetteria belongs to Metatheria'
- 'Sinbadelphys belongs to Metatheria'
- 'Stagodontidae was reranked as a unranked clade and belongs to Metatheria'
- 'Sulestes belongs to Deltatheroida'
- 'Swaindelphys belongs to Metatheria'
- 'Szalinia belongs to Peradectidae'
- 'Thylacodon belongs to Herpetotheriidae'
- 'Thylacodon montanensis belongs to Thylacodon'
- 'Thylacodon pusillus belongs to Thylacodon'
- 'Turgidodon belongs to Metatheria'
- 'Varalphadon belongs to Metatheria'