Opinions from R. B. Neuman and D. L. Bruton 1974
- 'Aporthophyla belongs to Taffiidae'
- 'Aporthophyla stoermeri belongs to Aporthophyla'
- 'Calyptaulax belongs to Dalmanitidae'
- 'Deiphoninae belongs to Cheiruridae'
- 'Eleutherocentrus williamsi is recombined as Goniotelina williamsi'
- 'Finkelnburgiidae belongs to Orthacea'
- 'Furcitellinae belongs to Strophomenidae'
- 'Goniotelina belongs to Bathyuridae'
- 'Goniotelina broeggeri belongs to Goniotelina' according to Strand 1932
- 'Isophragmatinae belongs to Leptestiidae'
- 'Isotelinae belongs to Asaphidae'
- 'Isoteloides belongs to Isotelinae'
- 'Leptestiidae belongs to Plectambonitacea'
- 'Niobe belongs to Niobinae'
- 'Niobe vogti belongs to Niobe' according to Strand 1948
- 'Niobinae belongs to Asaphidae'
- 'Orthacea belongs to Orthidina'
- 'Orthambonites bifurcatus is recombined as Trondorthis bifurcatus'
- 'Orthida belongs to Articulata'
- 'Orthidae belongs to Orthacea'
- 'Orthidina belongs to Orthida'
- 'Orthinae belongs to Orthidae'
- 'Plectambonitacea belongs to Strophomenidina'
- 'Sphaerocoryphe belongs to Deiphoninae'
- 'Strophomenacea belongs to Strophomenidina'
- 'Strophomenida belongs to Articulata'
- 'Strophomenidae belongs to Strophomenacea'
- 'Strophomenidina belongs to Strophomenida'
- 'Syndielasma belongs to Isophragmatinae'
- 'Syndielasma biseptatum belongs to Syndielasma' according to Cooper 1956
- 'Taffiidae belongs to Plectambonitacea'
- 'Trondorthis belongs to Orthinae'
- 'Trondorthis strandi belongs to Trondorthis'
- 'Trotlandella belongs to Furcitellinae'
- 'Trotlandella loki belongs to Trotlandella'