Opinions from D.H. Evans 2011

  • 'Allopiloceras belongs to Piloceratidae'
  • 'Allopiloceras bealachense belongs to Allopiloceras'
  • 'Allopiloceras lonachonense belongs to Allopiloceras'
  • 'Allopiloceras tennesseense belongs to Allopiloceras' according to Ulrich and Foerste 1936
  • 'Allotrioceratidae belongs to Endocerida'
  • 'Aphetoceras belongs to Estonioceratidae'
  • 'Apocrinoceras belongs to Apocrinoceratidae'
  • 'Apocrinoceras talboti belongs to Apocrinoceras' according to Teichert and Glenister 1954
  • 'Apocrinoceratidae belongs to Discosorida'
  • 'Augeoceras belongs to Piloceratidae'
  • 'Augeoceras gracile belongs to Augeoceras'
  • 'Baltoceratidae belongs to Orthocerida'
  • 'Bassleroceras belongs to Ellesmeroceratidae'
  • 'Bisonoceras belongs to Piloceratidae'
  • 'Buttsoceras belongs to Troedssonellidae'
  • 'Cassinoceras belongs to Piloceratidae'
  • 'Cassinoceras arkansasense is recombined as Expandocassinoceras arkansasense'
  • 'Cassinoceras grande is recombined as Expandocassinoceras grande'
  • 'Chihlioceratidae belongs to Endocerida'
  • 'Clitendoceras belongs to Proterocameroceratidae'
  • 'Cotteroceras belongs to Proterocameroceratidae'
  • 'Cyptendoceras belongs to Protocycloceratidae'
  • 'Cyrtoceras metellus is recombined as Dyscritoceras metellus'
  • 'Dakeoceras belongs to Ellesmeroceratidae'
  • 'Deltoceras belongs to Estonioceratidae'
  • 'Deltoceratidae is a subjective synonym of Estonioceratidae'
  • 'Diaphoroceras belongs to Ellesmeroceratidae'
  • 'Discosorida belongs to Nautiloidea'
  • 'Dissidocerida belongs to Orthoceratoidea'
  • 'Dyscritoceras belongs to Ellesmeroceratidae'
  • 'Ectocycloceras belongs to Rudolfoceratidae'
  • 'Ellesmeroceras belongs to Ellesmeroceratidae'
  • 'Ellesmeroceras (Metaellesmeroceras) belongs to Ellesmeroceras' according to Flower 1956
  • 'Ellesmeroceras (Metaellesmeroceras) is an invalid subgroup of Ellesmeroceras'
  • 'Ellesmeroceratida is corrected as Ellesmerocerida and belongs to Nautiloidea'
  • 'Ellesmeroceratidae belongs to Ellesmerocerida'
  • 'Endocerida belongs to Nautiloidea'
  • 'Escharendoceras belongs to Proterocameroceratidae'
  • 'Escharendoceras eccentricum belongs to Escharendoceras' according to Flower 1956
  • 'Estonioceratidae belongs to Tarphycerida'
  • 'Eurystomites belongs to Tarphyceratidae'
  • 'Expandocassinoceras belongs to Piloceratidae'
  • 'Manchuroceratidae belongs to Endocerida'
  • 'Nautiloidea belongs to Cephalopoda'
  • 'Nautilus kelloggi is recombined as Eurystomites kelloggi'
  • 'Nautilus pompanium is recombined as Pionoceras pompanium'
  • 'Orthoceras adamsi is recombined as Buttsoceras adamsi'
  • 'Orthoceras baculoides is recombined as Proterocameroceras baculoides'
  • 'Protocycloceras becki is a subjective synonym of Protocycloceras lamarcki'
  • 'Orthoceras brainerdi is recombined as Proterocameroceras brainerdi'
  • 'Orthoceras cataline is recombined as Ectocycloceras cataline'
  • 'Orthoceras durinum is recombined as Proterocameroceras durinum'
  • 'Orthoceras lamarcki is recombined as Protocycloceras lamarcki'
  • 'Protocycloceras lamarcki is a subjective synonym of Protocycloceras lamarcki'
  • 'Protocycloceras lamarcki is a subjective synonym of Protocycloceras lamarcki'
  • 'Orthoceras perseus is recombined as Bassleroceras perseus'
  • 'Orthoceras pertinens is recombined as Rhabdiferoceras pertinens' according to Blake 1882
  • 'Orthoceras pertinens is recombined as Rhabdiferoceras pertinens'
  • 'Orthocerida belongs to Orthoceratoidea'
  • 'Phragmosiphon belongs to Proterocameroceratidae'
  • 'Phragmosiphon septiferum belongs to Phragmosiphon' according to Flower 1956
  • 'Phragmosiphon septiferum belongs to Phragmosiphon' according to Flower 1956
  • 'Piloceras belongs to Piloceratidae'
  • 'Piloceras hornei is recombined as Bisonoceras hornei' according to Ulrich et al. 1943
  • 'Piloceras hornei is recombined as Bisonoceras hornei'
  • 'Piloceras invaginatum belongs to Piloceras' according to Salter in Murchison 1859
  • 'Cassinoceras wortheni is a subjective synonym of Cassinoceras wortheni'
  • 'Piloceras wortheni is recombined as Cassinoceras wortheni'
  • 'Piloceratidae belongs to Endocerida'
  • 'Pionoceras belongs to Tarphyceratidae'
  • 'Pionoceras peachi belongs to Pionoceras'
  • 'Platysiphon belongs to Proterocameroceratidae'
  • 'Platysiphon expansum belongs to Platysiphon' according to Flower 1956
  • 'Proterocameroceras belongs to Proterocameroceratidae'
  • 'Proterocameroceratidae belongs to Endocerida'
  • 'Protocycloceras belongs to Protocycloceratidae'
  • 'Protocycloceras affine belongs to Protocycloceras' according to Ulrich et al 1944
  • 'Protocycloceratidae belongs to Orthoceratoidea'
  • 'Rhabdiferoceras belongs to Baltoceratidae'
  • 'Rhabdocycloceratidae is a subjective synonym of Protocycloceratidae'
  • 'Rudolfoceras levisense is recombined as Ectocycloceras levisense'
  • 'Rudolfoceratidae belongs to Ellesmerocerida'
  • 'Stenosiphon belongs to Proterocameroceratidae'
  • 'Stenosiphon sandoi belongs to Stenosiphon' according to Flower 1956
  • 'Tajaroceras belongs to Troedssonellidae'
  • 'Tarphyceras belongs to Tarphyceratidae'
  • 'Tarphyceratida is corrected as Tarphycerida and belongs to Nautiloidea'
  • 'Tarphyceratidae belongs to Tarphycerida'
  • 'Trocholitidae belongs to Tarphycerida'
  • 'Trocholitoceras belongs to Trocholitidae'
  • 'Troedssonellidae belongs to Dissidocerida'