Opinions from R. L. Parsley and L. W. Mintz 1975
- 'Amygdalocystites florealis belongs to Amygdalocystites'
- 'Amygdalocystites laevis is a subjective synonym of Amygdalocystites florealis'
- 'Amygdalocystites radiatus belongs to Amygdalocystites'
- 'Amygdalocystites tribrachiatus belongs to Amygdalocystites' according to Bassler 1943
- 'Amygdalocystites tribrachiatus is recombined as Oklahomacystis tribrachiatus'
- 'Billingsocystis is a subjective synonym of Amygdalocystites'
- 'Amygdalocystites invaginata is a subjective synonym of Amygdalocystites radiatus'
- 'Canadocystis belongs to Platycystitidae'
- 'Canadocystis tennesseensis belongs to Canadocystis'
- 'Comarocystidae is corrected as Comarocystitidae and belongs to Comarocystitida'
- 'Comarocystites belongs to Comarocystitidae'
- 'Comarocystites punctatus belongs to Comarocystites' according to Billings 1854
- 'Comarocystites punctatus belongs to Comarocystites'
- 'Comarocystites shumardi belongs to Comarocystites'
- 'Comarocystites tribrachius belongs to Comarocystites'
- 'Malocystidae is corrected as Malocystitidae and belongs to Platycystitida'
- 'Malocystites belongs to Malocystitidae'
- 'Malocystites emmonsi is recombined as Canadocystis emmonsi'
- 'Malocystites murchisoni belongs to Malocystites'
- 'Platycystites bromidensis belongs to Platycystites' according to Bassler 1943
- 'Platycystites bromidensis is a subjective synonym of Platycystites cristatus'
- 'Platycystites cristatus belongs to Platycystites'
- 'Platycystites faberi belongs to Platycystites'
- 'Platycystites fimbriatus belongs to Platycystites' according to Bassler 1943
- 'Platycystites fimbriatus is a subjective synonym of Platycystites cristatus'
- 'Platycystites levatus belongs to Platycystites' according to Bassler 1943
- 'Platycystites levatus is a subjective synonym of Platycystites cristatus'
- 'Sinclairocystis belongs to Comarocystitidae'
- 'Sinclairocystis angulatus is a subjective synonym of Sinclairocystis praedicta'
- 'Sinclairocystis praedicta belongs to Sinclairocystis'
- 'Sinclairocystis sulphurensis is a subjective synonym of Sinclairocystis praedicta'
- 'Wellerocystis belongs to Malocystitidae'
- 'Wellerocystis kimmswickensis belongs to Wellerocystis'