Opinions from A. E. Wood 1958
- 'Abrocomidae belongs to Octodontoidea'
- 'Aplodontidae belongs to Aplodontoidea'
- 'Aplodontoidea belongs to Protrogomorpha'
- 'Capromyidae belongs to Octodontoidea'
- 'Castoridae belongs to Castoroidea'
- 'Caviidae belongs to Cavioidea'
- 'Cavioidea belongs to Caviomorpha'
- 'Caviomorpha was reranked as a suborder and belongs to Rodentia'
- 'Chinchillidae belongs to Chinchilloidea'
- 'Chinchilloidea belongs to Caviomorpha'
- 'Cricetidae belongs to Muroidea'
- 'Ctenomyidae belongs to Octodontoidea'
- 'Cuniculidae belongs to Chinchilloidea'
- 'Cylindrodontidae belongs to Protrogomorpha'
- 'Dasyproctidae belongs to Chinchilloidea'
- 'Dinomyidae belongs to Chinchilloidea'
- 'Dipodidae belongs to Dipodoidea'
- 'Dipodoidea belongs to Myomorpha'
- 'Echimyidae belongs to Octodontoidea'
- 'Eocardiidae belongs to Cavioidea'
- 'Eomyidae belongs to Geomyoidea'
- 'Erethizontidae belongs to Erethizontoidea'
- 'Erethizontoidea belongs to Caviomorpha'
- 'Eutypomyidae belongs to Castoroidea'
- 'Geomyidae belongs to Geomyoidea'
- 'Geomyoidea belongs to Myomorpha'
- 'Gliridae belongs to Gliroidea'
- 'Heptaxodontidae belongs to Chinchilloidea'
- 'Heteromyidae belongs to Geomyoidea'
- 'Hydrochoeridae belongs to Cavioidea'
- 'Ischyromyidae belongs to Protrogomorpha'
- 'Ischyromyoidea belongs to Protrogomorpha'
- 'Muridae belongs to Muroidea'
- 'Muroidea belongs to Myomorpha'
- 'Mylagaulidae belongs to Aplodontoidea'
- 'Myomorpha was reranked as a suborder and belongs to Rodentia'
- 'Octodontidae belongs to Octodontoidea'
- 'Octodontoidea belongs to Caviomorpha'
- 'Paramyidae belongs to Ischyromyoidea'
- 'Petromuridae belongs to Thryonomyoidea'
- 'Phiomyidae belongs to Protrogomorpha'
- 'Protoptychidae belongs to Protrogomorpha'
- 'Protrogomorpha was reranked as a suborder and belongs to Rodentia'
- 'Pseudosciuridae belongs to Theridomyoidea'
- 'Rhizomyidae belongs to Spalacoidea'
- 'Sciuravidae belongs to Protrogomorpha'
- 'Seleviniidae [misspelled as Seleveniidae] belongs to Gliroidea'
- 'Spalacidae belongs to Spalacoidea'
- 'Spalacoidea belongs to Myomorpha'
- 'Theridomyidae belongs to Theridomyoidea'
- 'Thryonomyidae belongs to Thryonomyoidea'
- 'Zapodidae belongs to Dipodoidea'