Opinions from A. E. Wilson 1951
- 'Archinacella clochensis belongs to Archinacella'
- 'Archinacella explanata belongs to Archinacella'
- 'Archinacella subrotunda belongs to Archinacella'
- 'Atrypa transversa belongs to Pterotheca'
- 'Bellerophon argo is recombined as Tropidodiscus argo'
- 'Sinuites bilobatus corrugatus is replaced by Sinuites bilobatus'
- 'Bellerophon cancellatus is recombined as Sinuites cancellatus'
- 'Bellerophon charon is recombined as Tetranota charon'
- 'Bellerophon disculus is recombined as Tropidodiscus disculus'
- 'Bellerophon punctifrons is recombined as Bucania punctifrons'
- 'Bellerophon sulcatinus is recombined as Bucania sulcatina'
- 'Bucania bidorsata is recombined as Tetranota bidorsata'
- 'Bucania buelli is recombined as Salpingostoma buelli'
- 'Bucania expansa is recombined as Salpingostoma expansum'
- 'Bucania halli belongs to Bucania'
- 'Chiton canadensis is recombined as Prisochiton canadensis'
- 'Clathrospira conica belongs to Clathrospira'
- 'Clathrospira convexa belongs to Clathrospira'
- 'Clioderma saffordi is recombined as Pterotheca saffordi'
- 'Conradella fimbriata is recombined as Phragmolites fimbriatus'
- 'Cyclonema cushingi belongs to Cyclonema'
- 'Cyclonema hallianum belongs to Cyclonema'
- 'Cyclonema montrealense belongs to Cyclonema'
- 'Cyclonema semicarinatum is recombined as Gyronema semicarinatum'
- 'Cyrtolites cristatus is recombined as Tropidodiscus cristatus'
- 'Cyrtolites disjunctus belongs to Cyrtolites'
- 'Cyrtospira tortilis belongs to Cyrtospira'
- 'Delthyris expansus is recombined as Pterotheca expansa'
- 'Eccyliopterus beloitensis is recombined as Eccyliomphalus beloitensis'
- 'Eotomaria dryope plana belongs to Eotomaria dryope'
- 'Eunema cerithioides is recombined as Daidia cerithioides'
- 'Eunema erigone belongs to Eunema'
- 'Eunema pagoda is recombined as Ectomaria pagoda'
- 'Eunema prisca is recombined as Ectomaria prisca'
- 'Eunema strigillatum belongs to Eunema'
- 'Fusispira angusta belongs to Fusispira'
- 'Fusispira angusta subplana belongs to Fusispira angusta'
- 'Fusispira convexa belongs to Fusispira'
- 'Fusispira elongata belongs to Fusispira'
- 'Fusispira inflata nepeana belongs to Fusispira inflata'
- 'Fusispira nobilis belongs to Fusispira'
- 'Fusispira nobilis medialis belongs to Fusispira nobilis'
- 'Fusispira planulata belongs to Fusispira'
- 'Fusispira subfusiformis germana belongs to Fusispira subfusiformis'
- 'Fusispira terebriformis belongs to Fusispira'
- 'Fusispira ventricosa belongs to Fusispira'
- 'Helicotoma declivis belongs to Helicotoma'
- 'Helicotoma granosa belongs to Helicotoma'
- 'Helicotoma larvata is recombined as Eotomaria larvata'
- 'Helicotoma planulata belongs to Helicotoma'
- 'Helicotoma spinosa belongs to Helicotoma'
- 'Helicotoma subquadrata belongs to Helicotoma'
- 'Helicotoma tennesseensis belongs to Helicotoma'
- 'Helicotoma umbilicata belongs to Helicotoma'
- 'Helicotoma verticalis belongs to Helicotoma'
- 'Holopea ampla belongs to Holopea'
- 'Holopea concinnula belongs to Holopea'
- 'Holopea excelsa belongs to Holopea'
- 'Holopea informis belongs to Holopea'
- 'Holopea lavinia belongs to Holopea'
- 'Holopea nereis belongs to Holopea'
- 'Holopea nereis spiralis belongs to Holopea nereis'
- 'Holopea obliqua belongs to Holopea'
- 'Holopea ophelia belongs to Holopea'
- 'Holopea ottawaensis belongs to Holopea'
- 'Holopea paludiniformis belongs to Holopea'
- 'Holopea parvula belongs to Holopea'
- 'Holopea pyrene belongs to Holopea'
- 'Holopea rotunda belongs to Holopea'
- 'Holopea undulata belongs to Holopea'
- 'Hormotoma salteri belongs to Murchisonia (Hormotoma)'
- 'Hormotoma salteri canadensis belongs to Hormotoma salteri'
- 'Hormotoma salteri ottawaensis belongs to Hormotoma salteri'
- 'Hormotoma simplex belongs to Hormotoma'
- 'Hormotoma simplex paquettensis belongs to Hormotoma simplex'
- 'Hormotoma trentonensis belongs to Murchisonia (Hormotoma)'
- 'Hormotoma trentonensis crassa belongs to Hormotoma trentonensis'
- 'Hormotoma trentonensis plana belongs to Hormotoma trentonensis'
- 'Lophospira augustina minnesotensis is recombined as Lophospira angustina'
- 'Lophospira notablis is recombined as Trochonemella notablis'
- 'Loxonema murrayana belongs to Loxonema'
- 'Loxonema subelongatus is recombined as Subulites subelongatus'
- 'Maclurea bigsbyi is recombined as Maclurites bigsbyi'
- 'Maclurea logani is recombined as Maclurites logani'
- 'Maclurea manitobensis is recombined as Maclurites manitobensis'
- 'Maclurites magna is corrected as Maclurites magnus and belongs to Maclurites'
- 'Metoptoma erato is recombined as Tryblidium erato'
- 'Metoptoma superba is recombined as Macroscenella superba'
- 'Micropileus obesus belongs to Micropileus'
- 'Micropileus ottawanus belongs to Micropileus'
- 'Murchisonia alexandra is recombined as Omospira alexandra'
- 'Murchisonia bellicincta is recombined as Hormotoma bellicincta'
- 'Murchisonia gracilis is recombined as Hormotoma gracilis'
- 'Murchisonia helicteres is recombined as Lophospira helicteres'
- 'Murchisonia major is recombined as Hormotoma major'
- 'Murchisonia milleri is recombined as Lophospira milleri'
- 'Murchisonia perangulata is recombined as Lophospira perangulata'
- 'Murchisonia procris is recombined as Lophospira procris'
- 'Murchisonia serrulata is recombined as Lophospira serrulata'
- 'Murchisonia subfusiformis is recombined as Fusispira subfusiformis'
- 'Murchisonia ventricosa is recombined as Lophospira ventricosa'
- 'Ophileta ottawaensis is recombined as Eccyliomphalus ottawaensis'
- 'Ophileta owenana is recombined as Eccyliomphalus owenanus'
- 'Phragmolites compressus belongs to Phragmolites'
- 'Pleurotomaria americana is recombined as Liospira americana'
- 'Pleurotomaria arachne is recombined as Trochonemella arachne'
- 'Pleurotomaria bilix is recombined as Cyclonema bilix'
- 'Pleurotomaria dryope is recombined as Eotomaria dryope'
- 'Pleurotomaria micula is recombined as Liospira micula'
- 'Pleurotomaria progne is recombined as Liospira progne'
- 'Pleurotomaria subconica is recombined as Clathrospira subconica'
- 'Pleurotomaria supracingulata is recombined as Eotomaria supracingulata'
- 'Pleurotomaria umbilicata is recombined as Trochonema umbilicata'
- 'Pleurotomaria vitruvia is recombined as Liospira vitruvia'
- 'Polyphemopsis elongatus is recombined as Subulites elongatus'
- 'Polyphemopsis elongatus is recombined as Subulites elongatus'
- 'Raphistoma aperta is recombined as Raphistomina aperta'
- 'Raphistoma distinctum is recombined as Raphistomina distincta'
- 'Raphistoma lapicida is recombined as Raphistomina lapicida'
- 'Raphistomina aperta ampla belongs to Raphistomina aperta'
- 'Salpingostoma billingsi belongs to Salpingostoma'
- 'Sinuites cancellatus angularis belongs to Sinuites cancellatus'
- 'Sinuites cancellatus liratus belongs to Sinuites cancellatus'
- 'Stenotheca unguiformis is recombined as Proplina unguiformis'
- 'Straparollus asperostriatus is recombined as Straparollina asperostriata'
- 'Straparollus circe is recombined as Straparollina circe'
- 'Straparollus eurydice is recombined as Straparollina eurydice'
- 'Subulites abbreviatus is recombined as Cyrtospira abbreviatus'
- 'Subulites acutus belongs to Subulites'
- 'Subulites canadensis belongs to Subulites'
- 'Subulites conradi belongs to Subulites'
- 'Subulites gloucesterensis belongs to Subulites'
- 'Subulites parvulus is recombined as Cyrtospira parvulus'
- 'Subulites regularis belongs to Subulites'
- 'Tetranota sexcarinata belongs to Tetranota'
- 'Trochonema fragile belongs to Trochonema'
- 'Trochonema umbilicata canadensis is a subjective synonym of Trochonema umbilicata'
- 'Trochonemella montrealensis belongs to Trochonemella'
- 'Vallatotheca manitoulini is recombined as Tryblidium manitoulini'