Opinions from D. Heidelberger and K. Bandel 1999
- 'Alaskazygopleura eifelia belongs to Alaskazygopleura'
- 'Alaskozygopleura [misspelled as Alaskazygopleura] belongs to Palaeozygopleuridae'
- 'Alaskozygopleura crassicostata [misspelled as Alaskazygopleura crassicostata] belongs to Alaskazygopleura'
- 'Archaeosphera belongs to Holopeidae'
- 'Buechelia horizontalis belongs to Buechelia'
- 'Clisospiridae belongs to Mimospirina'
- 'Clisospirinae belongs to Clisospiridae'
- 'Euomphalus labadyei is recombined as Nodeuomphalus labadyei'
- 'Holopella tenuisulcata belongs to Holopella'
- 'Kallispira belongs to Palaeozygopleuridae'
- 'Kallispira latostriata belongs to Kallispira'
- 'Kallispira varistriata belongs to Kallispira'
- 'Loxonema arduum belongs to Loxonema'
- 'Loxonema girzenbergense is recombined as Soetenichia girzenbergense'
- 'Loxonema retrostriatum is recombined as Palaeozygopleura retrostriatum'
- 'Loxonematacea is corrected as Loxonematoidea and belongs to Stylogastropoda'
- 'Lukesispira frydai belongs to Lukesispira'
- 'Lukesispira pulchra belongs to Lukesispira'
- 'Melania kaupii is recombined as Loxonema kaupii'
- 'Nerrhena belongs to Cycloneritimorpha'
- 'Nerrhena reticulata belongs to Nerrhena'
- 'Nodeuomphalus leunissi belongs to Nodeuomphalus'
- 'Palaeozygopleuridae belongs to Loxonematoidea'
- 'Peruneloidea belongs to Gastropoda'
- 'Sinistriconcha belongs to Clisospirinae'
- 'Sinistriconcha lierli belongs to Sinistriconcha'
- 'Soetenichia belongs to Peruneloidea'
- 'Straparollus devonoaltus belongs to Straparollus'
- 'Straparollus minimus is recombined as Archaeosphera minima'
- 'Straparollus planiformis belongs to Straparollus'
- 'Straparollus wachtbergi is recombined as Archaeosphera wachtbergi'
- 'Turbo aequistriatus is recombined as Nerrhena aequistriatus'
- 'Urftia belongs to Palaeozygopleuridae'
- 'Urftia convexa belongs to Urftia'