Opinions from R. H. Flower 1962

  • 'Allumettoceras belongs to Allumettoceratidae'
  • 'Allumettoceratidae belongs to Michelinoceratida'
  • 'Bactritidae belongs to Michelinoceratida'
  • 'Buttsoceras atticus belongs to Buttsoceras' according to Billings 1865
  • 'Choanoceras belongs to Choanoceratidae'
  • 'Choanoceratidae belongs to Michelinoceratida'
  • 'Clinoceras belongs to Clinoceratidae'
  • 'Clinoceratidae belongs to Michelinoceratida'
  • 'Cycloceras belongs to Michelinoceratida'
  • 'Cycloceratidae belongs to Michelinoceratida'
  • 'Cyrtactinoceras belongs to Proteoceratidae'
  • 'Engorthoceras belongs to Engorthoceratidae'
  • 'Engorthoceratidae belongs to Michelinoceratida'
  • 'Ephippiorthoceras belongs to Proteoceratidae'
  • 'Eskimoceratidae belongs to Michelinoceratida'
  • 'Euorthoceras belongs to Proteoceratidae'
  • 'Geisonoceratidae belongs to Michelinoceratida'
  • 'Gorbyoceras belongs to Proteoceratidae'
  • 'Gordonoceras belongs to Proteoceratidae'
  • 'Greenlandoceratidae belongs to Michelinoceratida'
  • 'Hammelloceras is a subjective synonym of Gorbyoceras'
  • 'Hammelloceratidae is a subjective synonym of Proteoceratidae'
  • 'Kogenoceras is a subjective synonym of Tofangoceras'
  • 'Mesnaquaceras belongs to Proteoceratidae'
  • 'Michelinoceras primum belongs to Michelinoceras'
  • 'Michelinoceras richardsi belongs to Michelinoceras'
  • 'Michelinoceras vandiverense belongs to Michelinoceras' according to Ulrich et al. 1944
  • 'Monomuchites belongs to Proteoceratidae'
  • 'Mooreoceratidae is a subjective synonym of Pseudorthoceratidae'
  • 'Offleyoceratidae belongs to Michelinoceratida'
  • 'Ohioceratidae is an invalid subgroup of Cephalopoda'
  • 'Orthoceras clarksvillense is recombined as Pleurorthoceras clarksvillense'
  • 'Orthoceras selkirkense belongs to Orthoceras' according to Whiteaves 1892
  • 'Orthoceras selkirkense is recombined as Pleurorthoceras selkirkense'
  • 'Orthoceras truncatum is recombined as Sphooceras truncatum'
  • 'Orthoceras truncatum belongs to Orthoceras' according to Barrande 1860
  • 'Orthoceratidae belongs to Michelinoceratida'
  • 'Orthoceros regularis belongs to Orthoceros' according to Schlotheim 1820
  • 'Orthoceros regularis belongs to Orthoceros'
  • 'Orthocerotidae is a subjective synonym of Orthoceratidae'
  • 'Orthonybyoceras belongs to Proteoceratidae'
  • 'Polygrammoceras belongs to Troedssonellidae'
  • 'Proteoceras belongs to Proteoceratidae'
  • 'Pseudeskimoceras belongs to Eskimoceratidae'
  • 'Rasmussenoceras belongs to Allumettoceratidae'
  • 'Sactorthoceratidae belongs to Michelinoceratida'
  • 'Sinoceratidae belongs to Michelinoceratida'
  • 'Sphooceras belongs to Sphooceratidae'
  • 'Spyroceratidae is a subjective synonym of Pseudorthoceratidae'
  • 'Striatoceratidae belongs to Michelinoceratida'
  • 'Tofangoceras belongs to Proteoceratidae'
  • 'Tripteroceras belongs to Allumettoceratidae'
  • 'Tripterocerina belongs to Allumettoceratidae'
  • 'Troedssonoceratidae is replaced by Striatoceratidae'
  • 'Whiteavesites belongs to Clinoceratidae'