Opinions from P. D. Gingerich 1979
- 'Aphanolemur is a subjective synonym of Smilodectes'
- 'Aphanolemur gibbosus is a subjective synonym of Smilodectes gracilis'
- 'Copelemur belongs to Notharctinae'
- 'Hipposyus is a subjective synonym of Notharctus'
- 'Hipposyus formosus is a subjective synonym of Notharctus tenebrosus'
- 'Hyopsodus gracilis is recombined as Smilodectes gracilis'
- 'Limnotherium is a subjective synonym of Notharctus'
- 'Limnotherium affine is a subjective synonym of Notharctus tenebrosus'
- 'Limnotherium tyrannus is a subjective synonym of Notharctus tenebrosus'
- 'Notharctidae was reranked as the subfamily Notharctinae and belongs to Adapidae'
- 'Notharctus belongs to Notharctinae'
- 'Notharctus formosus is a subjective synonym of Notharctus tenebrosus'
- 'Notharctus formosus belongs to Notharctus' according to Gregory 1916
- 'Notharctus formosus is replaced by Notharctus osborni' according to Granger and Gregory 1917
- 'Notharctus matthewi is a subjective synonym of Smilodectes gracilis'
- 'Notharctus osborni is a subjective synonym of Notharctus tenebrosus'
- 'Notharctus pugnax belongs to Notharctus'
- 'Notharctus pugnax is a subjective synonym of Notharctus tenebrosus' according to Lucas and Williamson 1993
- 'Notharctus robinsoni belongs to Notharctus'
- 'Notharctus robustior belongs to Notharctus'
- 'Notharctus tenebrosus belongs to Notharctus'
- 'Pelycodus belongs to Notharctinae'
- 'Pelycodus relictus is a nomen nudum'
- 'Smilodectes belongs to Notharctinae'
- 'Smilodectes mcgrewi belongs to Smilodectes'
- 'Telmalestes is a subjective synonym of Notharctus'
- 'Telmatolestes crassus is a subjective synonym of Notharctus robustior'
- 'Thinolestes is a subjective synonym of Notharctus'
- 'Thinolestes anceps is a subjective synonym of Notharctus tenebrosus'
- 'Tomitherium is a subjective synonym of Notharctus'
- 'Tomitherium rostratum is a subjective synonym of Notharctus tenebrosus'