Opinions from N.J. Morris and R. J. Cleevely 1981
- 'Amphiscapha belongs to Euomphalidae'
- 'Amphiscapha (Cylicioscapha) was reranked as Cylicioscapha and belongs to Euomphalidae'
- 'Amphitomaria belongs to Euomphalidae'
- 'Babylonites belongs to Omphalotrochidae'
- 'Barnesella belongs to Ophiletidae'
- 'Calaurops belongs to Ophiletidae'
- 'Centrifugus belongs to Euomphalidae'
- 'Ceratopea belongs to Ophiletidae'
- 'Diploconula belongs to Omphalotrochidae'
- 'Dirhachopea belongs to Ophiletidae'
- 'Discotropis belongs to Omphalotrochidae'
- 'Ecculiomphalus belongs to Ophiletidae'
- 'Eccyliomphalus alatus is recombined as Eccyliopterus alatus'
- 'Eccyliopterus belongs to Helicotominae'
- 'Elkoceras belongs to Euomphalidae'
- 'Elkoceras volborthi belongs to Elkoceras'
- 'Euomphalacea is corrected as Euomphaloidea and belongs to Pleurotomariina'
- 'Euomphalidae belongs to Euomphaloidea'
- 'Euomphalopsis belongs to Euomphalidae'
- 'Euomphalus belongs to Euomphalidae'
- 'Euomphalus (Woehrmannia) was reranked as Woehrmannia and belongs to Euomphalidae'
- 'Euomphalus cristatus is recombined as Phanerotinus cristatus'
- 'Helicotoma belongs to Helicotominae'
- 'Helicotominae was reranked as the family Helicotomidae and belongs to Euomphaloidea'
- 'Lecanospira belongs to Ophiletidae'
- 'Leptomphalus belongs to Euomphalidae'
- 'Lesueurilla belongs to Ophiletidae'
- 'Lophonema belongs to Helicotominae'
- 'Lytospira belongs to Ophiletidae'
- 'Macluritella belongs to Euomphalidae'
- 'Mastigospira belongs to Ophiletidae'
- 'Micromphalus belongs to Omphalotrochidae'
- 'Nevadaspira belongs to Euomphalidae'
- 'Odontomaria belongs to Ophiletidae'
- 'Omphalocirrus belongs to Euomphalidae'
- 'Omphalotrochidae belongs to Euomphaloidea'
- 'Omphalotrochus belongs to Omphalotrochidae'
- 'Ophileta belongs to Ophiletidae'
- 'Ophiletidae belongs to Euomphaloidea'
- 'Ophiletina belongs to Ophiletidae'
- 'Orecopia belongs to Omphalotrochidae'
- 'Orospira bigranosa is recombined as Lophonema bigranosa'
- 'Pararaphistoma belongs to Ophiletidae'
- 'Phanerotinus belongs to Euomphalidae'
- 'Philoxene belongs to Euomphalidae'
- 'Planotectus belongs to Euomphalidae'
- 'Pleuronotus belongs to Euomphalidae'
- 'Poleumita belongs to Euomphalidae'
- 'Polhemia taneyensis is recombined as Lophonema taneyensis'
- 'Schizopea belongs to Ophiletidae'
- 'Serpulospira belongs to Euomphalidae'
- 'Sinistrispira belongs to Euomphalidae'
- 'Sinutropis belongs to Euomphalidae'
- 'Straparollus belongs to Euomphalidae'