Opinions from R. H. Flower 1964
- 'Balkoceras belongs to Balkoceratidae'
- 'Balkoceras gracile belongs to Balkoceras'
- 'Balkoceratidae belongs to Plectronoceratina'
- 'Baltoceras belongs to Baltoceratidae'
- 'Baltoceras pusillum is recombined as Rioceras pusillum'
- 'Baltoceras striatum belongs to Baltoceras'
- 'Baltoceratidae belongs to Ellesmeroceratina'
- 'Barnesoceras belongs to Ellesmeroceratidae'
- 'Barnesoceras clavatum belongs to Barnesoceras'
- 'Barnesoceras conosiphonatum belongs to Barnesoceras'
- 'Barnesoceras expansum belongs to Barnesoceras'
- 'Barnesoceras lamellosum belongs to Barnesoceras'
- 'Barnesoceras lentiexpansum belongs to Barnesoceras'
- 'Barnesoceras percurvatum belongs to Barnesoceras'
- 'Barnesoceras transversum belongs to Barnesoceras'
- 'Boreoceras belongs to Ellesmeroceratidae'
- 'Boreoceras brevicameratum belongs to Boreoceras'
- 'Boreoceras ovale belongs to Boreoceras'
- 'Boreoceras washburni belongs to Boreoceras'
- 'Burenoceras belongs to Ellesmeroceratidae'
- 'Burenoceras cornucopia belongs to Burenoceras'
- 'Burenoceras muricoides belongs to Burenoceras'
- 'Burenoceras phragmoceroides belongs to Burenoceras'
- 'Cartersoceras belongs to Baltoceratidae'
- 'Cartersoceras shideleri belongs to Cartersoceras'
- 'Caseoceras obesum belongs to Caseoceras'
- 'Clarkoceras [misspelled as Clarkeoceras] belongs to Ellesmeroceratidae'
- 'Clelandoceras belongs to Ellesmeroceratidae'
- 'Clelandoceras rarum belongs to Clelandoceras'
- 'Conocerina belongs to Ellesmeroceratidae'
- 'Conocerina brevis belongs to Conocerina' according to Ulrich and Foerste 1935
- 'Conocerina unguloides belongs to Conocerina'
- 'Cyptendoceras belongs to Baltoceratidae'
- 'Cyptendoceras floridaense belongs to Cyptendoceras'
- 'Cyptendoceras kirki belongs to Cyptendoceras'
- 'Cyptendoceras rhythmicum belongs to Cyptendoceras'
- 'Cyptendoceras richardsoni belongs to Cyptendoceras'
- 'Cyptendocerina belongs to Ellesmeroceratida'
- 'Cyrtoceras cambria belongs to Cyrtoceras' according to Walcott 1905
- 'Cyrtoceras cambria is recombined as Plectronoceras cambria' according to Ulrich and Foerste 1933
- 'Dakeoceras belongs to Ellesmeroceratidae'
- 'Dakeoceras harrisi belongs to Dakeoceras'
- 'Dakeoceras mutabile belongs to Dakeoceras'
- 'Ectenolites belongs to Ellesmeroceratidae'
- 'Ectenolites penecilin belongs to Ectenolites'
- 'Ectenolites primus belongs to Ectenolites'
- 'Ellesmeroceras belongs to Ellesmeroceratidae'
- 'Ellesmeroceras robsonensis is recombined as Robsonoceras robsonense' according to Ulrich and Foerste 1936
- 'Ellesmeroceras robsonensis is recombined as Robsonoceras robsonense'
- 'Ellesmeroceras scheii belongs to Ellesmeroceras' according to Foerste 1921
- 'Ellesmeroceras scheii belongs to Ellesmeroceras'
- 'Ellesmeroceratida belongs to Nautiloidea'
- 'Ellesmeroceratidae belongs to Ellesmeroceratina'
- 'Ellesmeroceratina belongs to Ellesmeroceratida'
- 'Endoceras burchardii is recombined as Baltoceras burchardi'
- 'Endoceras consuetum is recombined as Rioceras consuetum'
- 'Endocycloceras belongs to Protocycloceratidae'
- 'Endocycloceras gracile belongs to Endocycloceras'
- 'Endorioceras belongs to Baltoceratidae'
- 'Endorioceras rarum belongs to Endorioceras'
- 'Keraiaceras belongs to Ellesmeroceratidae'
- 'Levisoceras belongs to Ellesmeroceratidae'
- 'Levisoceras contractum belongs to Levisoceras'
- 'Llanoceras belongs to Ellesmeroceratidae'
- 'Llanoceras gracile belongs to Llanoceras'
- 'Metabaltoceras belongs to Baltoceratidae'
- 'Metabaltoceras fusiforme belongs to Metabaltoceras'
- 'Metabaltoceras minutum belongs to Metabaltoceras'
- 'Microbaltoceras belongs to Baltoceratidae'
- 'Microbaltoceras minore belongs to Microbaltoceras'
- 'Muriceras belongs to Ellesmeroceratidae'
- 'Muriceras anomalum belongs to Muriceras'
- 'Muriceras curviseptatum belongs to Muriceras'
- 'Muriceras gracile belongs to Muriceras'
- 'Muriceras hebetum belongs to Muriceras'
- 'Muriceras micromurus belongs to Muriceras'
- 'Muriceras moderatum belongs to Muriceras'
- 'Muriceras murus belongs to Muriceras'
- 'Muriceras obscurum belongs to Muriceras'
- 'Murrayoceras belongs to Baltoceratidae'
- 'Murrayoceras noveboracense is recombined as Cartersoceras noveboracense'
- 'Palaeoceras belongs to Plectronoceratidae'
- 'Palaeoceras mutabile belongs to Palaeoceras'
- 'Palaeoceras undulatum belongs to Palaeoceras'
- 'Piloceras newtonwinchelli [misspelled as Clarkeoceras newtonwinchelli] belongs to Clarkoceras'
- 'Plectronoceras belongs to Plectronoceratidae'
- 'Plectronoceras exile belongs to Plectronoceras'
- 'Plectronoceratidae belongs to Plectronoceratina'
- 'Plectronoceratina belongs to Ellesmeroceratida'
- 'Protocycloceratidae belongs to Ellesmeroceratina'
- 'Rhabdiferoceras annuliferum belongs to Rhabdiferoceras'
- 'Rioceras dartoni belongs to Rioceras'
- 'Rioceras depressum belongs to Rioceras'
- 'Rioceras expansum belongs to Rioceras'
- 'Rioceras fusiforme belongs to Rioceras'
- 'Rioceras lobatum belongs to Rioceras'
- 'Rioceras nondescriptum belongs to Rioceras'
- 'Rioceras tubulare belongs to Rioceras'
- 'Rioceras wellsi belongs to Rioceras'
- 'Robsonoceras belongs to Ellesmeroceratidae'
- 'Ruthenoceras belongs to Ellesmeroceratidae'
- 'Woosteroceras belongs to Ellesmeroceratidae'
- 'Woosteroceras flexiseptatum belongs to Woosteroceras'
- 'Woosteroceras percurvatum belongs to Woosteroceras'
- 'Woosteroceras spirale belongs to Woosteroceras'