Opinions from S. A. Northrop 1939
- 'Amphilichas anticostiensis belongs to Amphilichas'
- 'Amphistrophia extensa belongs to Amphistrophia'
- 'Anomia pecten is recombined as Schuchertella pecten'
- 'Barrandella kindlei belongs to Barrandella'
- 'Bellerophon dilatatus is recombined as Salpingostoma dilatatum'
- 'Bellerophon ornatus belongs to Bellerophon'
- 'Bronteus ekwanaspis is recombined as Goldius ekwanensis'
- 'Clathrodictyon crickmayi belongs to Clathrodictyon'
- 'Ctenodonta subcircularis belongs to Ctenodonta' according to Prouty 1923
- 'Cyathophyllum eriphyle belongs to Cyathophyllum' according to Billings 1862
- 'Cyathophyllum eriphyle is recombined as Omphyma eriphyle'
- 'Cyclolites rotuloides is recombined as Palaeocyclus rotuloides'
- 'Cyrtolites clemvillensis belongs to Cyrtolites'
- 'Cyrtolites insculptus belongs to Cyrtolites'
- 'Cyrtolites pharetra belongs to Cyrtolites'
- 'Euomphalopterus gasconsensis belongs to Euomphalopterus'
- 'Euomphalus discors is recombined as Poleumita discors'
- 'Euomphalus macrolineatus is recombined as Poleumita macrolineata'
- 'Helictes aequilaterus is recombined as Euomphalopterus aequilaterus'
- 'Holopea niagarensis belongs to Holopea'
- 'Idioglyptus belongs to Stropheodontinae'
- 'Idioglyptus stigmatus belongs to Idioglyptus'
- 'Leptaena profunda belongs to Leptaena' according to Hall 1852
- 'Leptaena profunda is recombined as Protomegastrophia profunda'
- 'Liljevallia vieillensis belongs to Liljevallia'
- 'Liospira marklandensis belongs to Liospira'
- 'Loxonema subulata is recombined as Hormotoma subulata'
- 'Omphyma belongs to Rugosa'
- 'Orthis flabellites belongs to Orthis' according to Foerste 1889
- 'Pentamerus knightii is recombined as Conchidium knighti'
- 'Phacops trisulcata is recombined as Phacopidella trisulcata' according to Ulrich and Bassler 1923
- 'Planitrochus dominus is recombined as Prosolarium dominus'
- 'Platyceras subumbonatum belongs to Platyceras'
- 'Platyostoma niagarensis is recombined as Diaphorostoma niagarense'
- 'Pleurotomaria axion belongs to Pleurotomaria'
- 'Pleurotomaria cirrhosa is recombined as Prosolarium cirrhosum'
- 'Pleurotomaria elora is recombined as Euomphalopterus elora'
- 'Pleurotomaria halei is recombined as Euomphalopterus halei'
- 'Pleurotomaria putillus belongs to Pleurotomaria'
- 'Pleurotomaria subundata belongs to Pleurotomaria'
- 'Pleurotomaria valeria is recombined as Euomphalopterus valeria'
- 'Poleumita chaleurensis belongs to Poleumita'
- 'Proetus turgidus belongs to Proetus'
- 'Prosolarium platybasis belongs to Prosolarium'
- 'Prosolarium scalatum belongs to Prosolarium'
- 'Pterinea mclearni belongs to Pterinea'
- 'Rhynchonella fringilla is recombined as Camarotoechia fringilla'
- 'Salpingostoma inornatum belongs to Salpingostoma'
- 'Salpingostoma orientalis belongs to Salpingostoma'
- 'Seelya moydartensis belongs to Seelya'
- 'Straparollus crenulatus is recombined as Poleumita crenulata'
- 'Stricklandia gaspeensis belongs to Stricklandia'
- 'Stromatoporella chouinardensis belongs to Stromatoporella'
- 'Stromatoporella crassa belongs to Stromatoporella'
- 'Stromatoporella prima belongs to Stromatoporella'
- 'Strombodes approximatus belongs to Strombodes' according to Parks 1933
- 'Strombodes approximatus is recombined as Arachnophyllum approximatum'
- 'Syringopora bifurcata belongs to Syringopora'
- 'Syringopora compacta belongs to Syringopora'
- 'Syringopora reteformis [misspelled as Syringopora retiformis] belongs to Syringopora'
- 'Tremanotus longitudinalis belongs to Tremanotus'
- 'Tremanotus minutus belongs to Tremanotus'
- 'Turbinites alatus is recombined as Euomphalopterus alatus'