Opinions from R. M. Schoch 1986
- 'Calamodon is a subjective synonym of Ectoganus'
- 'Calamodon is a subjective synonym of Ectoganus' according to Schoch 1981
- 'Calamodon arcamaenus is a subjective synonym of Ectoganus gliriformis'
- 'Calamodon arcamaenus is a subjective synonym of Ectoganus gliriformis' according to Schoch 1981
- 'Calamodon cylindrifer is a subjective synonym of Stylinodon mirus'
- 'Calamodon novomehicanus is a subjective synonym of Ectoganus gliriformis'
- 'Calamodon novomehicanus is a subjective synonym of Ectoganus gliriformis' according to Schoch 1981
- 'Calamodon simplex is a subjective synonym of Ectoganus gliriformis'
- 'Calamodon simplex is a subjective synonym of Ectoganus gliriformis' according to Schoch 1981
- 'Conicodon is a subjective synonym of Ectoganus'
- 'Conoryctes crassicuspis is recombined as Goniacodon crassicuspis'
- 'Dryptodon is a subjective synonym of Ectoganus'
- 'Dryptodon is a subjective synonym of Ectoganus' according to Schoch 1981
- 'Dryptodon crassus is a subjective synonym of Ectoganus gliriformis'
- 'Dryptodon crassus is a subjective synonym of Ectoganus gliriformis' according to Schoch 1981
- 'Ectoganus bighornensis is a subjective synonym of Ectoganus copei'
- 'Ectoganus bighornensis belongs to Ectoganus' according to Schoch 1981
- 'Hemiganus is a subjective synonym of Psittacotherium'
- 'Hemiganus vultuosus is a subjective synonym of Psittacotherium multifragum'
- 'Hexodon is a subjective synonym of Conoryctes'
- 'Hexodon molestus is a subjective synonym of Conoryctes comma'
- 'Lampadophorus is a subjective synonym of Ectoganus'
- 'Lampadophorus expectatus is a subjective synonym of Ectoganus gliriformis'
- 'Onychodectes rarus is a subjective synonym of Onychodectes tisonensis'
- 'Onychodectes rarus is a subjective synonym of Onychodectes tisonensis' according to Schoch 1981
- 'Onychodectes rarus belongs to Onychodectes' according to Osborn and Earle 1895
- 'Periptychus ditrigonus is recombined as Ectoconus ditrigonus'
- 'Psittacotherium aspasiae belongs to Psittacotherium'
- 'Psittacotherium lobdelli is a subjective synonym of Ectoganus gliriformis'
- 'Psittacotherium megalodus is a subjective synonym of Psittacotherium multifragum'
- 'Triisodon heilprinianus is a nomen dubium'