Opinions from I. Puura and L. E. Holmer 1993
- 'Acrothele belongs to Acrothelinae'
- 'Acrothele coriacea belongs to Acrothele' according to Linnarsson 1876
- 'Acrothelidae belongs to Acrotretoidea'
- 'Acrothelinae belongs to Acrothelidae'
- 'Acrotreta tanneri is recombined as Ceratreta tanneri'
- 'Acrotretida belongs to Lingulata'
- 'Acrotretidae belongs to Acrotretoidea'
- 'Acrotretinae belongs to Acrotretidae'
- 'Acrotretoidea belongs to Acrotretida'
- 'Ceratreta belongs to Ceratretidae'
- 'Ceratretidae belongs to Acrotretoidea'
- 'Clistotrema is a subjective synonym of Keyserlingia' according to Popov et al. 1989
- 'Dictyonema flabelliforme multithecatum belongs to Dictyonema flabelliforme' according to Bulman 1954
- 'Elkaniidae belongs to Linguloidea'
- 'Eoconulidae belongs to Acrotretoidea'
- 'Eoconulus belongs to Eoconulidae'
- 'Eosiphonotreta belongs to Siphonotretidae'
- 'Ephippelasmatinae belongs to Ceratretidae'
- 'Gochtia rete is recombined as Marcusodictyon rete'
- 'Heteronema priscum is recombined as Marcusodictyon priscum'
- 'Keyserlingia belongs to Ceratretidae'
- 'Lamanskya belongs to Elkaniidae'
- 'Lingulella acuta is recombined as Oepikites acutes'
- 'Lingulella kitatiensis is recombined as Oepikites kitatiensis'
- 'Lingulellinae belongs to Obolidae'
- 'Lingulida belongs to Lingulata'
- 'Linguloidea belongs to Lingulida'
- 'Linnarssoniinae belongs to Acrotretidae'
- 'Marcusodictyon expectans belongs to Marcusodictyon' according to Mergl 1984
- 'Obolidae belongs to Linguloidea'
- 'Obolinae belongs to Obolidae'
- 'Obolus ingricus is recombined as Ungula ingrica'
- 'Obolus inornatus is recombined as Ungula inornata'
- 'Obolus triangularis is a subjective synonym of Ungula triangularis'
- 'Oepikites belongs to Obolinae'
- 'Oepikites elongatus belongs to Oepikites' according to Popov and Khazanovitch 1984
- 'Oepikites fragilis belongs to Oepikites' according to Popov and Khazanovitch 1984
- 'Oepikites macilentus belongs to Oepikites' according to Khazanovitch and Popov 1894
- 'Oepikites triquetrus belongs to Oepikites' according to Popov and Khazanovitch 1984
- 'Orbicula buchii is recombined as Keyserlingia buchii'
- 'Orbicula reversa is recombined as Keyserlingia reversa'
- 'Orbithele belongs to Acrothelinae'
- 'Paterinida belongs to Lingulata'
- 'Pomeraniotreta belongs to Ephippelasmatinae'
- 'Pomeraniotreta biernati belongs to Pomeraniotreta' according to Bednarczyk 1986
- 'Pomeraniotreta biernati belongs to Pomeraniotreta' according to Bednarczyk 1986
- 'Quadrisonia belongs to Acrotretinae'
- 'Rowellella belongs to Lingulellinae'
- 'Schmidtia celata is recombined as Schmidtites celatus'
- 'Schmidtites belongs to Obolinae'
- 'Siphonotretida belongs to Lingulata'
- 'Siphonotretidae belongs to Siphonotretoidea'
- 'Siphonotretoidea belongs to Siphonotretida'
- 'Stilpnotreta belongs to Linnarssoniinae'
- 'Torynelasmatinae belongs to Acrotretidae'
- 'Treptotreta belongs to Acrotretinae'
- 'Ungula belongs to Obolinae'
- 'Ungula convexa belongs to Ungula' according to Pander 1830
- 'Ungula triangularis belongs to Ungula'
- 'Ungula triangularis is a subjective synonym of Ungula inornata' according to Popov et al. 1989