Opinions from L. E. Holmer 1986
- 'Acanthambonia belongs to Acanthamboniinae'
- 'Acanthambonia minutissima belongs to Acanthambonia' according to Cooper 1956
- 'Acanthamboniinae belongs to Siphonotretidae'
- 'Acrotretacea belongs to Acrotretidina'
- 'Acrotretella belongs to Torynelasmatinae'
- 'Acrotretella siluriana belongs to Acrotretella' according to Ireland 1961
- 'Acrotretida belongs to Inarticulata'
- 'Acrotretidae belongs to Acrotretacea'
- 'Acrotretidina belongs to Acrotretida'
- 'Atrypa nitens is recombined as Hisingerella nitens'
- 'Conotreta belongs to Acrotretinae'
- 'Conotreta orbicularis belongs to Conotreta'
- 'Discinacea belongs to Acrotretidina'
- 'Discinidae belongs to Discinacea'
- 'Eoconulidae belongs to Acrotretacea'
- 'Eoconulus belongs to Eoconulidae'
- 'Eoconulus dymiensis belongs to Eoconulus' according to Bednarczyk and Biernat 1978
- 'Ephippelasma belongs to Ephippelasmatinae'
- 'Ephippelasmatinae belongs to Acrotretidae'
- 'Glossellinae belongs to Obolidae'
- 'Hisingerella belongs to Acrotretinae'
- 'Hisingerella davidsoni belongs to Hisingerella' according to Reed 1917
- 'Hisingerella tenuis belongs to Hisingerella'
- 'Inarticulata belongs to Brachiopoda'
- 'Lingula davisii is recombined as Lingulella davisii'
- 'Lingulacea belongs to Lingulida'
- 'Lingulella belongs to Lingulellinae'
- 'Lingulellinae belongs to Obolidae'
- 'Lingulida belongs to Inarticulata'
- 'Lurigitcoma belongs to Ephippelasmatinae'
- 'Myotreta belongs to Ephippelasmatinae'
- 'Numericoma belongs to Ephippelasmatinae'
- 'Obolidae belongs to Lingulacea'
- 'Orbicula elliptica is recombined as Schizotreta elliptica'
- 'Orbiculoideinae belongs to Discinidae'
- 'Paterula belongs to Paterulidae'
- 'Paterulidae belongs to Lingulacea'
- 'Rhinotreta belongs to Ephippelasmatinae'
- 'Rhinotreta muscularis belongs to Rhinotreta'
- 'Rowellella belongs to Lingulellinae'
- 'Scaphelasma belongs to Scaphelasmatinae'
- 'Scaphelasma mica belongs to Scaphelasma' according to Popov 1975
- 'Scaphelasmatinae belongs to Acrotretidae'
- 'Schizotreta belongs to Orbiculoideinae'
- 'Siphonotretacea belongs to Acrotretidina'
- 'Siphonotretidae belongs to Siphonotretacea'
- 'Torynelasma belongs to Torynelasmatinae'
- 'Torynelasmatinae belongs to Acrotretidae'
- 'Veliseptum belongs to Ephippelasmatinae'
- 'Veliseptum fragile belongs to Veliseptum' according to Popov 1976
- 'Veliseptum strictum belongs to Veliseptum'