Opinions from C. H. C. Brunton and C. Champion 1974

  • 'Acanthocrania belongs to Craniacea'
  • 'Acrotretida belongs to Inarticulata'
  • 'Ambocoeliidae belongs to Cyrtiacea'
  • 'Athyridacea belongs to Spiriferida'
  • 'Athyrididae belongs to Athyridacea'
  • 'Athyridinae belongs to Athyrididae'
  • 'Avonia belongs to Overtoniidae'
  • 'Avonia (Quasiavonia) belongs to Avonia'
  • 'Cardiarinidae belongs to Rhynchonellacea'
  • 'Cleiothyridina belongs to Athyridinae'
  • 'Coledium belongs to Stenoscismatidae'
  • 'Craniacea belongs to Acrotretida'
  • 'Crurithyris belongs to Ambocoeliidae'
  • 'Cyrtiacea belongs to Spiriferida'
  • 'Cyrtina belongs to Cyrtinidae'
  • 'Cyrtinidae belongs to Suessiacea'
  • 'Davidsoniacea belongs to Strophomenida'
  • 'Dielasmatacea belongs to Terebratulida'
  • 'Dielasmatidae belongs to Dielasmatacea'
  • 'Echinoconchidae belongs to Productacea'
  • 'Fusella belongs to Spiriferidae'
  • 'Girtyella belongs to Dielasmatidae'
  • 'Hustedia belongs to Retziidae'
  • 'Lambdarina belongs to Lambdarininae'
  • 'Lambdarininae belongs to Cardiarinidae'
  • 'Overtoniidae belongs to Productacea'
  • 'Pleuropugnoides belongs to Wellerellidae'
  • 'Productoidea is corrected as Productacea and belongs to Strophomenida'
  • 'Pustula belongs to Echinoconchidae'
  • 'Retziacea belongs to Spiriferida'
  • 'Retziidae belongs to Retziacea'
  • 'Rhynchonellacea belongs to Rhynchonellida'
  • 'Rhynchonellida belongs to Articulata'
  • 'Schuchertella belongs to Schuchertellidae'
  • 'Schuchertellidae belongs to Davidsoniacea'
  • 'Spiriferacea belongs to Spiriferida'
  • 'Spiriferellina belongs to Spiriferinidae'
  • 'Spiriferida belongs to Articulata'
  • 'Spiriferidae belongs to Spiriferacea'
  • 'Spiriferinacea belongs to Spiriferida'
  • 'Spiriferinidae belongs to Spiriferinacea'
  • 'Stegacanthia belongs to Echinoconchidae'
  • 'Stenoscismatacea belongs to Rhynchonellida'
  • 'Stenoscismatidae belongs to Stenoscismatacea'
  • 'Strophomenida belongs to Articulata'
  • 'Suessiacea belongs to Spiriferida'
  • 'Terebratulida belongs to Articulata'
  • 'Wellerellidae belongs to Rhynchonellacea'