Opinions from A. D. Wright 1964
- 'Bancroftina belongs to Dalmanellidae'
- 'Clitambonitidae belongs to Clitambonitacea'
- 'Dalmanella belongs to Dalmanellidae'
- 'Dalmanella portranensis belongs to Dalmanella'
- 'Dalmanellidae belongs to Dalmanellacea'
- 'Dicoelosia belongs to Dicoelosiidae'
- 'Dicoelosiidae belongs to Dalmanellacea'
- 'Dinorthidae belongs to Orthacea'
- 'Dolerorthidae belongs to Orthacea'
- 'Dolerorthis belongs to Dolerorthidae'
- 'Dolerorthis inaequicostata belongs to Dolerorthis'
- 'Glyptorthinae belongs to Hesperorthidae'
- 'Glyptorthis belongs to Glyptorthinae'
- 'Glyptorthis maritima magna belongs to Glyptorthis maritima'
- 'Harknessellidae belongs to Dalmanellacea'
- 'Hebertella belongs to Plectorthinae'
- 'Hesperorthidae belongs to Orthacea'
- 'Hesperorthinae belongs to Hesperorthidae'
- 'Hesperorthis belongs to Hesperorthinae'
- 'Isorthinae belongs to Schizophoriidae'
- 'Isorthis belongs to Isorthinae'
- 'Isorthis bailyi belongs to Isorthis'
- 'Kullervo belongs to Kullervoidae'
- 'Kullervo complectens albida belongs to Kullervo complectens' according to Reed 1917
- 'Kullervoidae belongs to Clitambonitacea'
- 'Laticrura belongs to Linoporellidae'
- 'Laticrura erecta belongs to Laticrura'
- 'Linoporellidae belongs to Dalmanellacea'
- 'Mcewanella belongs to Rhactorthinae'
- 'Mcewanella dorsisulcata belongs to Mcewanella'
- 'Nicolella belongs to Productorthinae'
- 'Orthambonites belongs to Orthinae'
- 'Orthambonites humilidorsatus belongs to Orthambonites'
- 'Orthidae belongs to Orthacea'
- 'Orthidiellidae belongs to Orthacea'
- 'Orthinae belongs to Orthidae'
- 'Orthis actoniae is recombined as Nicolella actoniae'
- 'Orthis lyckholmiensis is recombined as Orthambonites lyckholmiensis'
- 'Orthis porcata is recombined as Plaesiomys porcata'
- 'Orthisina complectens is recombined as Kullervo complectens' according to Wiman 1907
- 'Oxoplecia belongs to Triplesiidae'
- 'Oxoplecia cooperi belongs to Oxoplecia'
- 'Plaesiomys belongs to Dinorthidae'
- 'Plectorthidae belongs to Orthacea'
- 'Plectorthinae belongs to Plectorthidae'
- 'Plectorthis belongs to Plectorthinae'
- 'Plectorthis perditosulcata belongs to Plectorthis'
- 'Portranella belongs to Orthidiellidae'
- 'Portranella angulocostellata belongs to Portranella'
- 'Productorthinae belongs to Orthidae'
- 'Ptychopleurella belongs to Glyptorthinae'
- 'Ptychopleurella separata belongs to Ptychopleurella'
- 'Reuschella belongs to Harknessellidae'
- 'Rhactorthidae was reranked as the subfamily Rhactorthinae and belongs to Plectorthidae'
- 'Rhactorthis belongs to Rhactorthinae'
- 'Saukrodictya belongs to Saukrodictyidae'
- 'Saukrodictyidae belongs to Orthacea'
- 'Scaphorthis belongs to Plectorthinae'
- 'Scaphorthis sulcata belongs to Scaphorthis'
- 'Schizophorella belongs to Plectorthinae'
- 'Schizophorella fallax silicis belongs to Schizophorella fallax'
- 'Schizophoriidae belongs to Dalmanellacea'
- 'Skenidiidae belongs to Orthacea'
- 'Skenidioides belongs to Skenidiidae'
- 'Skenidioides asteroidea belongs to Skenidioides' according to Reed 1917
- 'Skenidioides paucicostatus belongs to Skenidioides'
- 'Spinorthis belongs to Glyptorthinae'
- 'Spinorthis geniculata belongs to Spinorthis'
- 'Streptis belongs to Triplesiidae'
- 'Taphrorthis belongs to Orthinae'
- 'Triplesia belongs to Triplesiidae'
- 'Triplesia insularis belongs to Triplesia' according to Eichwald 1842
- 'Triplesia plicata is recombined as Ogmoplecia plicata'
- 'Triplesia plicata is recombined as Oxoplecia plicata' according to Wiman 1907
- 'Triplesiidae belongs to Triplesiacea'
- 'Vellamo belongs to Clitambonitidae'
- 'Vellamo sulculata belongs to Vellamo'