Opinions from M. Rubel 1961
- 'Angusticardinia belongs to Syntrophopsidae'
- 'Apheoorthina belongs to Eoorthinae'
- 'Apheoorthina daunus belongs to Apheoorthina' according to Walcott 1905
- 'Apheoorthina ferrigena belongs to Apheoorthina' according to Havlíček 1949
- 'Apheoorthis belongs to Eoorthinae'
- 'Atrypa nucella is recombined as Lycophoria nucella'
- 'Billingsellidae belongs to Orthacea'
- 'Camerellidae belongs to Syntrophiacea'
- 'Crassiorina belongs to Dalmanellidae'
- 'Cyrtonotella belongs to Orthinae'
- 'Cyrtonotella pakriensis belongs to Cyrtonotella'
- 'Dalmanellidae belongs to Dalmanellacea'
- 'Eoorthinae belongs to Billingsellidae'
- 'Eoorthis lineocosta is recombined as Apheoorthis lineocostis'
- 'Glossorthis belongs to Orthinae'
- 'Lycophoria belongs to Lycophoriidae'
- 'Lycophoria lamanskii belongs to Lycophoria'
- 'Nicolella belongs to Orthidae'
- 'Nothorthis belongs to Orthinae'
- 'Nothorthis penetrabilis belongs to Nothorthis'
- 'Orthambonites belongs to Orthinae'
- 'Orthambonites inaequalis belongs to Orthambonites'
- 'Orthambonites majuscula belongs to Orthambonites'
- 'Orthambonites parva is recombined as Paurorthis parva'
- 'Orthidae belongs to Orthacea'
- 'Orthidiella belongs to Orthidiellidae'
- 'Orthidiellidae belongs to Orthacea'
- 'Orthinae belongs to Orthidae'
- 'Orthis belongs to Orthinae'
- 'Orthis actoniae is recombined as Nicolella actoniae'
- 'Orthis bocki is recombined as Panderina bocki'
- 'Orthis calligramma is recombined as Orthambonites calligramma'
- 'Orthis desiderata is recombined as Prantlina desiderata'
- 'Orthis parvula is recombined as Ranorthis parvula'
- 'Orthis schmidti is recombined as Glossorthis schmidti'
- 'Panderina belongs to Productorthinae'
- 'Panderina pakriensis belongs to Panderina'
- 'Paurorthidae belongs to Dalmanellacea'
- 'Paurorthina belongs to Paurorthidae'
- 'Paurorthina resima belongs to Paurorthina'
- 'Paurorthis belongs to Paurorthidae'
- 'Paurorthis valida belongs to Paurorthis'
- 'Pentamerus longissimus is recombined as Lycophoria longissima'
- 'Platystrophia belongs to Platystrophiinae'
- 'Platystrophiinae belongs to Plectorthidae'
- 'Plectorthidae belongs to Orthacea'
- 'Porambonites acuminata is recombined as Rhynchocamara acuminata'
- 'Porambonites costatus is recombined as Platystrophia costata'
- 'Porambonites recta is recombined as Angusticardinia recta'
- 'Porambonites striata is recombined as Angusticardinia striata'
- 'Prantlina belongs to Productorthinae'
- 'Prantlina nasuta belongs to Prantlina'
- 'Productorthinae belongs to Orthidae'
- 'Productorthis belongs to Productorthinae'
- 'Productus abscissus is recombined as Panderina abscissa'
- 'Productus abscissus is recombined as Panderina abscissa' according to Pander 1830
- 'Productus aculeatus is recombined as Productorthis aculeata'
- 'Productus eminens is recombined as Productorthis eminens'
- 'Productus latus is recombined as Panderina lata'
- 'Productus minimus is recombined as Paurorthis minima'
- 'Productus obtusus is recombined as Productorthis obtusus'
- 'Productus orbicularis is recombined as Orthambonites orbicularis'
- 'Productus parallelus is recombined as Productorthis parallela'
- 'Productus pterygoidea is recombined as Nicolella pterygoidea'
- 'Productus tetragonus is recombined as Panderina tetragona'
- 'Ranorthidae belongs to Orthacea'
- 'Ranorthis belongs to Ranorthidae'
- 'Ranorthis carinata belongs to Ranorthis'
- 'Ranorthis norvegica belongs to Ranorthis' according to Öpik 1939
- 'Ranorthis trivia belongs to Ranorthis'
- 'Rhynchocamara belongs to Camerellidae'
- 'Rhynchocamara plicata belongs to Rhynchocamara' according to Schuchert and Cooper 1931
- 'Syntrophopsidae belongs to Syntrophiacea'
- 'Terebratula biforatus is recombined as Platystrophia biforatus'
- 'Terebratula globosa is recombined as Lycophoria globosa'
- 'Terebratula semicircularis is recombined as Cyrtonotella semicircularis'