Opinions from J. Hansen and L. E. Holmer 2011
- 'Acanthambonia belongs to Siphonotretidae'
- 'Acanthambonia minutisima belongs to Acanthambonia' according to Cooper 1956
- 'Acrotreta curvata is recombined as Eurytreta curvata'
- 'Acrotretida belongs to Lingulata'
- 'Acrotretidae belongs to Acrotretoidea'
- 'Acrotretoidea belongs to Acrotretida'
- 'Anomalorthidae belongs to Orthoidea'
- 'Anomalorthis belongs to Anomalorthidae'
- 'Anomalorthis rossi belongs to Anomalorthis'
- 'Anomalorthis utahensis belongs to Anomalorthis' according to Ulrich and Cooper 1936
- 'Apheoorthis belongs to Eoorthidae'
- 'Archaeorthidae belongs to Orthoidea'
- 'Archaeorthis belongs to Archaeorthidae'
- 'Atrypa nitens is recombined as Hisingerella nitens'
- 'Biernatia belongs to Biernatidae'
- 'Biernatidae belongs to Acrotretida'
- 'Broeggeria belongs to Elkaniidae'
- 'Broeggeria obscura belongs to Broeggeria'
- 'Camerella belongs to Camerellinae'
- 'Camerellidae belongs to Camerelloidea'
- 'Camerellinae belongs to Camerellidae'
- 'Camerelloidea belongs to Syntrophiidina'
- 'Conotreta belongs to Acrotretidae'
- 'Conotreta convexa belongs to Conotreta'
- 'Conotreta depressa is recombined as Cyrtonotreta depressa'
- 'Cyrtonotreta belongs to Acrotretidae'
- 'Cyrtonotreta profilbekkiensis belongs to Cyrtonotreta'
- 'Cyrtonotreta spinosa belongs to Cyrtonotreta'
- 'Dictyonites belongs to Paterinidae'
- 'Dictyonites mugilis belongs to Dictyonites'
- 'Discinacea is corrected as Discinoidea and belongs to Lingulida'
- 'Discinidae belongs to Discinoidea'
- 'Ectenoglossa belongs to Obolinae'
- 'Ectenoglossa oviforma belongs to Ectenoglossa'
- 'Elkaniidae belongs to Linguloidea'
- 'Elliptoglossa belongs to Elliptoglossinae'
- 'Elliptoglossa vulgaris belongs to Elliptoglossa'
- 'Elliptoglossinae belongs to Obolidae'
- 'Eoconulidae belongs to Acrotretoidea'
- 'Eoconulus belongs to Eoconulidae'
- 'Eoconulus rectangulatus belongs to Eoconulus' according to Cooper 1956
- 'Eoconulus subquadratus belongs to Eoconulus'
- 'Eoorthidae belongs to Plectorthoidea'
- 'Ephippelasmatidae belongs to Acrotretoidea'
- 'Eurytreta belongs to Acrotretidae'
- 'Eurytreta subtriangularis belongs to Eurytreta'
- 'Finkelnburgiidae belongs to Plectorthoidea'
- 'Glossella belongs to Glossellinae'
- 'Glossellinae belongs to Obolidae'
- 'Hesperonomia belongs to Hesperonomiidae'
- 'Hesperonomia planidorsalis belongs to Hesperonomia' according to Ulrich and Clarke 1936
- 'Hesperonomia subtransversa belongs to Hesperonomia'
- 'Hesperonomiidae belongs to Orthoidea'
- 'Hisingerella belongs to Acrotretidae'
- 'Hisingerella maniformis belongs to Hisingerella'
- 'Idiostrophia belongs to Camerellinae'
- 'Idiostrophia valdari belongs to Idiostrophia' according to Ross 1972
- 'Lenticulella belongs to Obolinae'
- 'Leptaena sordida is recombined as Leptella sordida'
- 'Leptella belongs to Leptellinae'
- 'Leptella (Leptella) belongs to Leptella'
- 'Leptella (Leptella) inequicostellata belongs to Leptella (Leptella)'
- 'Leptellinae belongs to Taffiidae'
- 'Leptobolus ovalis is recombined as Elliptoglossa ovalis'
- 'Lingula attenuata is recombined as Palaeoglossa attenuata'
- 'Lingula lesueuri is recombined as Ectenoglossa lesueuri'
- 'Lingulata belongs to Linguliformea'
- 'Lingulella amphora is recombined as Lenticulella amphora'
- 'Lingulellotretidae belongs to Linguloidea'
- 'Lingulida belongs to Lingulata'
- 'Linguliformea belongs to Brachiopoda'
- 'Linguloidea belongs to Lingulida'
- 'Mirilingula belongs to Lingulellotretidae'
- 'Mirilingula svalbardensis belongs to Mirilingula'
- 'Nothorthis belongs to Archaeorthidae'
- 'Nothorthis delicatula belongs to Nothorthis' according to Ulrich and Cooper 1938
- 'Nothorthis subpyramidalis belongs to Nothorthis'
- 'Numericoma belongs to Ephippelasmatidae'
- 'Numericoma ornata belongs to Numericoma' according to Popov 1980
- 'Numericoma proclina belongs to Numericoma'
- 'Obolella salteri is recombined as Broeggeria salteri'
- 'Obolidae belongs to Linguloidea'
- 'Obolinae belongs to Obolidae'
- 'Orbicula elliptica is recombined as Schizotreta elliptica'
- 'Orthambonites bifurcatus is recombined as Trondorthis bifurcatus'
- 'Orthida belongs to Rhynchonellata'
- 'Orthidae belongs to Orthoidea'
- 'Orthidiella belongs to Orthidiellidae'
- 'Orthidiella longwelli belongs to Orthidiella' according to Ulrich and Cooper 1936
- 'Orthidiellidae belongs to Orthoidea'
- 'Orthidina belongs to Orthida'
- 'Orthis (Finkelnburgia) was reranked as Finkelnburgia and belongs to Finkelnburgiidae'
- 'Orthis (Finkelnburgia) finkelnburgi is recombined as Finkelnburgia finkelnburgi'
- 'Orthis delicatula is recombined as Pelonomia delicatula'
- 'Orthis electra is recombined as Archaeorthis electra'
- 'Orthoidea belongs to Orthidina'
- 'Pachyglossa dorsiconvexa is recombined as Pachyglossella dorsiconvexa'
- 'Pachyglossella belongs to Glossellinae'
- 'Palaeoglossa belongs to Obolinae'
- 'Palaeostrophia belongs to Syntrophopsinae'
- 'Paterinata belongs to Linguliformea'
- 'Paterinida belongs to Paterinata'
- 'Paterinidae belongs to Paterinoidea'
- 'Paterinoidea belongs to Paterinida'
- 'Pelonomia belongs to Pelonomiinae'
- 'Pelonomia sulcata belongs to Pelonomia'
- 'Pelonomiinae belongs to Taffiidae'
- 'Pentamerida belongs to Rhynchonellata'
- 'Phragmorthidae belongs to Plectorthoidea'
- 'Phragmorthis belongs to Phragmorthidae'
- 'Phragmorthis noda belongs to Phragmorthis'
- 'Plectambonitoidea belongs to Strophomenata'
- 'Plectorthoidea belongs to Orthidina'
- 'Porambonitoidea belongs to Syntrophiidina'
- 'Protorthida belongs to Rhynchonellata'
- 'Protoskenidioides belongs to Skenidiidae'
- 'Protoskenidioides promontorium belongs to Protoskenidioides'
- 'Protoskenidioides revelata belongs to Protoskenidioides' according to Williams 1974
- 'Pseudoporambonites belongs to Punctolirinae'
- 'Pseudoporambonites yichangensis belongs to Pseudoporambonites' according to Zeng 1977
- 'Punctolirinae belongs to Tetralobulidae'
- 'Rhynchonellata belongs to Rhynchonelliformea'
- 'Rhynchonelliformea belongs to Brachiopoda'
- 'Rosobolus belongs to Zhanatellidae'
- 'Rosobolus elongatus belongs to Rosobolus'
- 'Rosobolus robertinus belongs to Rosobolus' according to Havlíček 1982
- 'Scaphelasma belongs to Scaphelasmatidae'
- 'Scaphelasma lamellosum belongs to Scaphelasma' according to Krause and Rowell 1975
- 'Scaphelasma septatum belongs to Scaphelasma' according to Cooper 1956
- 'Scaphelasmatidae belongs to Acrotretoidea'
- 'Schizotreta belongs to Discinidae'
- 'Schizotreta marginalis belongs to Schizotreta'
- 'Semitreta belongs to Acrotretidae'
- 'Semitreta basisslettaensis belongs to Semitreta'
- 'Semitreta major belongs to Semitreta' according to Biernat 1973
- 'Semitreta pustulosa belongs to Semitreta'
- 'Semitreta spitsbergensis belongs to Semitreta'
- 'Siphonotretida belongs to Lingulata'
- 'Siphonotretidae belongs to Siphonotretoidea'
- 'Siphonotretoidea belongs to Siphonotretida'
- 'Skenidiidae belongs to Skenidioidea'
- 'Skenidioidea belongs to Protorthida'
- 'Strophomenata belongs to Rhynchonelliformea'
- 'Strophomenoidea belongs to Strophomenata'
- 'Syntrophia orthia is recombined as Palaeostrophia orthia'
- 'Syntrophiidina belongs to Pentamerida'
- 'Syntrophopsinae belongs to Tetralobulidae'
- 'Taffiidae belongs to Plectambonitoidea'
- 'Tetralobulidae belongs to Porambonitoidea'
- 'Torynelasma belongs to Torynelasmatidae'
- 'Torynelasma toryniferum belongs to Torynelasma' according to Cooper 1956
- 'Torynelasmatidae belongs to Acrotretoidea'
- 'Trondorthis belongs to Orthidae'
- 'Zhanatellidae belongs to Linguloidea'