Opinions from L. Marshall 1982
- 'Caenolestidae belongs to Caenolestoidea'
- 'Caenolestoidea was reranked as a suborder and belongs to Marsupialia'
- 'Clenia is a subjective synonym of Microbiotherium'
- 'Clenia is replaced by Clenialites' according to Ameghino 1906
- 'Clenia minuscula is a subjective synonym of Microbiotherium divisum'
- 'Clenialites is a subjective synonym of Microbiotherium'
- 'Clenialitidae is an invalid subgroup of Microbiotheriidae'
- 'Coona belongs to Didelphidae'
- 'Coona gaudryi belongs to Coona' according to Simpson 1964
- 'Coona gaudryi is recombined as Eomicrobiotherium gaudryi'
- 'Coona pattersoni belongs to Coona'
- 'Didelphidae belongs to Didelphoidea'
- 'Didelphoidea belongs to Marsupialia'
- 'Didelphys australis belongs to Didelphys' according to Philippi 1893
- 'Didelphys australis is recombined as Dromiciops australis'
- 'Dromiciops belongs to Microbiotheriidae'
- 'Dromiciops gliroides is a subjective synonym of Dromiciops australis'
- 'Eodidelphys is a subjective synonym of Microbiotherium'
- 'Eodidelphys famula is a subjective synonym of Microbiotherium tehuelchum'
- 'Eodidelphys fortis is a subjective synonym of Microbiotherium tehuelchum'
- 'Eomicrobiotherium belongs to Didelphidae'
- 'Garzonia is a subjective synonym of Stilotherium'
- 'Garzonia annectens is a subjective synonym of Stilotherium dissimile'
- 'Garzonia captiva is a subjective synonym of Stilotherium dissimile'
- 'Garzonia minima is a subjective synonym of Stilotherium dissimile'
- 'Garzonia typica is a subjective synonym of Stilotherium dissimile'
- 'Hadrorhynchus is a subjective synonym of Microbiotherium'
- 'Hadrorhynchus conspicuus is a subjective synonym of Microbiotherium patagonicum'
- 'Hadrorhynchus tortor is a subjective synonym of Microbiotherium tehuelchum'
- 'Hadrorhynchus torvus is a subjective synonym of Microbiotherium tehuelchum'
- 'Halmarhiphus is a subjective synonym of Stilotherium'
- 'Halmarhiphus didelpoides is a subjective synonym of Microbiotherium tehuelchum'
- 'Halmarhiphus nanus is a subjective synonym of Stilotherium dissimile'
- 'Ideodelphys is a nomen vanum'
- 'Ideodelphys microscopicus is a nomen vanum'
- 'Microbiotheridae is corrected as Microbiotheriidae and belongs to Didelphoidea'
- 'Microbiotherium belongs to Microbiotheriidae'
- 'Microbiotherium forticulum is a subjective synonym of Microbiotherium tehuelchum'
- 'Microbiotherium gallegosense belongs to Microbiotherium'
- 'Microbiotherium gutierrezi belongs to Microbiotherium' according to Del Corro 1977
- 'Microbiotherium gutierrezi is recombined as Eomicrobiotherium gutierrezi'
- 'Microbiotherium hernandezi is recombined as Microbiotheridion hernandezi' according to Ringuelet 1953
- 'Microbiotherium hernandezi belongs to Microbiotherium' according to Simpson 1932
- 'Microbiotherium hernandezi is a subjective synonym of Microbiotherium divisum'
- 'Microbiotherium patagonicum belongs to Microbiotherium'
- 'Microbiotherium tehuelchum belongs to Microbiotherium'
- 'Oligobiotherium is a subjective synonym of Microbiotherium'
- 'Oligobiotherium divisus is recombined as Microbiotherium divisum'
- 'Pachybiotherium belongs to Didelphidae'
- 'Pachybiotherium acclinum belongs to Pachybiotherium'
- 'Parhalmarhiphus is a subjective synonym of Stilotherium'
- 'Phonocdromus belongs to Caenolestidae'
- 'Phonocdromus gracilis belongs to Phonocdromus'
- 'Phonocdromus patagonicus is a subjective synonym of Microbiotherium tehuelchum'
- 'Pichipilus exilis is a subjective synonym of Stilotherium dissimile'
- 'Prodidelphys is a subjective synonym of Microbiotherium'
- 'Prodidelphys acicula is recombined as Microbiotherium acicula'
- 'Prodidelphys obtusa is a subjective synonym of Microbiotherium acicula'
- 'Prodidelphys pavita is a subjective synonym of Microbiotherium acicula'
- 'Proteodidelphys is a subjective synonym of Microbiotherium'
- 'Proteodidelphys praecursor is recombined as Microbiotherium praecursor'
- 'Stilotherium belongs to Caenolestidae'
- 'Stilotherium dissimile belongs to Stilotherium'
- 'Stylognathus is a subjective synonym of Microbiotherium'
- 'Stylognathus diprotodontoides is a subjective synonym of Microbiotherium patagonicum'