Opinions from G. A. Cooper 1976
- 'Arctohedra belongs to Protorthidae'
- 'Glyptoria belongs to Protorthidae'
- 'Glyptoria glypta belongs to Glyptoria'
- 'Israelaria belongs to Protorthidae'
- 'Israelaria parnesi belongs to Israelaria'
- 'Kotujella belongs to Protorthidae'
- 'Kutorginacea belongs to Kutorginida'
- 'Leioria belongs to Leioriidae'
- 'Leioria bentori belongs to Leioria'
- 'Leioria elongata belongs to Leioria'
- 'Leioriidae belongs to Orthacea'
- 'Lingulacea belongs to Lingulida'
- 'Nisusia (Jamesella) was reranked as Jamesella and belongs to Protorthidae'
- 'Obolellacea belongs to Obolellida'
- 'Obolellidae belongs to Obolellacea'
- 'Obolidae belongs to Lingulacea'
- 'Obolinae belongs to Obolidae'
- 'Obolus radifer belongs to Obolus' according to Richter and Richter 1941
- 'Obolus radifer is recombined as Trematosia radifer'
- 'Orthacea belongs to Orthidina'
- 'Orthidina belongs to Orthida'
- 'Paterina alata belongs to Paterina' according to King 1923
- 'Paterina alata is recombined as Psiloria alata'
- 'Protorthacea belongs to Orthidina'
- 'Protorthidae belongs to Protorthacea'
- 'Protorthis belongs to Protorthidae'
- 'Psiloria belongs to Protorthidae'
- 'Psiloria dayei belongs to Psiloria'
- 'Psiloria pauperata belongs to Psiloria'
- 'Trematobolus belongs to Obolellidae'
- 'Trematobolus palaestinensis belongs to Trematobolus' according to Richter and Richter 1941
- 'Trematobolus palaestinensis belongs to Trematobolus'
- 'Trematosia belongs to Yorkiidae'
- 'Trematosia undulata belongs to Trematosia'
- 'Yorkiidae belongs to Kutorginacea'