Opinions from A. Rõõmusoks 1964

  • 'Camarotoechiidae belongs to Camarotoechiacea'
  • 'Camerellidae belongs to Syntrophiacea'
  • 'Cyclospira belongs to Cyclospiridae'
  • 'Cyclospira levisulcata belongs to Cyclospira'
  • 'Cyclospiridae belongs to Spiriferacea'
  • 'Glyptorthinae belongs to Hesperorthidae'
  • 'Glyptorthis belongs to Glyptorthinae'
  • 'Glyptorthis plana belongs to Glyptorthis'
  • 'Glyptorthis squamata belongs to Glyptorthis'
  • 'Hebertella belongs to Plectorthinae'
  • 'Hebertella estonica belongs to Hebertella'
  • 'Hesperorthidae belongs to Orthacea'
  • 'Hypsiptycha belongs to Orthorhynchulidae'
  • 'Hypsiptycha procera belongs to Hypsiptycha'
  • 'Onychoplecia belongs to Triplesiidae'
  • 'Onychoplecia schmidti belongs to Onychoplecia'
  • 'Orthorhynchulidae belongs to Rhynchonellacea'
  • 'Parallelelasma belongs to Parallelelasmatidae'
  • 'Parallelelasma kukrusensis belongs to Parallelelasma'
  • 'Parallelelasmatidae belongs to Pentameracea'
  • 'Plectorthidae belongs to Orthacea'
  • 'Plectorthinae belongs to Plectorthidae'
  • 'Ptychopleurella belongs to Glyptorthinae'
  • 'Ptychopleurella pirguensis belongs to Ptychopleurella'
  • 'Rostricellula belongs to Camarotoechiidae'
  • 'Rostricellula nobilis belongs to Rostricellula' according to Oraspold 1956
  • 'Stenocamara belongs to Stenocamarinae'
  • 'Stenocamara biohermica belongs to Stenocamara'
  • 'Stenocamarinae belongs to Camerellidae'
  • 'Triplesiidae belongs to Triplesiacea'