Opinions from N. H. Landman and K. M. Waage 1993
- 'Ammonites abyssinus is a subjective synonym of Hoploscaphites nicolletii'
- 'Ammonites cheyennensis belongs to Ammonites' according to Owen 1852
- 'Ammonites cheyennensis is recombined as Scaphites (Discoscaphites) cheyennensis' according to Meek 1876
- 'Ammonites cheyennensis is recombined as Discoscaphites cheyennensis' according to Reeside 1927
- 'Ammonites cheyennensis is recombined as Hoploscaphites cheyennensis' according to Landman and Waage 1986
- 'Hoploscaphites cheyennensis is a subjective synonym of Jeletzkytes nebrascensis'
- 'Ammonites conradi is recombined as Discoscaphites conradi'
- 'Ammonites conradi is recombined as Scaphites (Discoscaphites) conradi' according to Meek 1876
- 'Ammonites constrictus is recombined as Hoploscaphites constrictus'
- 'Ammonites mandanensis belongs to Ammonites' according to Morton 1842
- 'Ammonites mandanensis is recombined as Scaphites mandanensis' according to Meek and Hayden 1856
- 'Ammonites mandanensis is recombined as Scaphites mandanensis' according to Meek and Hayden 1856
- 'Scaphites mandanensis is a subjective synonym of Hoploscaphites nicolletii'
- 'Ammonites nebrascensis is recombined as Jeletzkytes nebrascensis'
- 'Ammonites nebrascensis is recombined as Discoscaphites nebrascensis' according to Cobban and Reeside 1952
- 'Ammonites nebrascensis is recombined as Scaphites (Discoscaphites) nebrascensis' according to Jeletzky 1960
- 'Ammonites nicolletii belongs to Ammonites' according to Morton 1842
- 'Ammonites nicolletii is recombined as Hoploscaphites nicolletii'
- 'Ammonites nicolletii is recombined as Discoscaphites nicolletii' according to Reeside 1927
- 'Ammonites nicolletii is recombined as Scaphites nicolletii' according to Meek and Hayden 1856
- 'Ammonites nicolletii is recombined as Scaphites (Hoploscaphites) nicolletii' according to Jeletzky 1952
- 'Discoscaphites belongs to Scaphitinae'
- 'Discoscaphites roanensis belongs to Discoscaphites' according to Stephenson 1941
- 'Discoscaphites roanensis is a subjective synonym of Discoscaphites conradi'
- 'Discoscaphites rossi belongs to Discoscaphites'
- 'Hoploscaphites was reranked as Scaphites (Hoploscaphites) and belongs to Scaphites' according to Jeletzky 1952
- 'Hoploscaphites belongs to Scaphitinae'
- 'Hoploscaphites birkelundi belongs to Hoploscaphites'
- 'Hoploscaphites melloi belongs to Hoploscaphites'
- 'Jeletzkytes belongs to Scaphitinae'
- 'Jeletzkytes dorfi belongs to Jeletzkytes'
- 'Jeletzkytes spedeni belongs to Jeletzkytes'
- 'Scaphitaceae belongs to Ammonoidea'
- 'Scaphites (Ammonites) comprimus is recombined as Hoploscaphites comprimus'
- 'Scaphites (Ammonites) comprimus belongs to Scaphites (Ammonites)' according to Owen 1852
- 'Scaphites (Ammonites) nodosus is recombined as Jeletzkytes nodosus'
- 'Scaphites (Discoscaphites) conradi gulosus belongs to Scaphites (Discoscaphites) conradi' according to Morton 1834
- 'Scaphites (Discoscaphites) conradi gulosus is recombined as Discoscaphites gulosus'
- 'Scaphitidae belongs to Scaphitaceae'
- 'Scaphitinae belongs to Scaphitidae'