Opinions from W. K. Spencer 1951
- 'Archegonaster belongs to Archegonasteridae'
- 'Archegonaster pentagonus belongs to Archegonaster'
- 'Archegonasteridae belongs to Somasteroidea'
- 'Chinianaster belongs to Chinianasteridae'
- 'Chinianaster levyi belongs to Chinianaster'
- 'Chinianasteridae belongs to Goniactinida'
- 'Eophiura belongs to Eophiuridae'
- 'Eophiura bohemica belongs to Eophiura'
- 'Eophiura petaloides is a subjective synonym of Eophiura bohemica'
- 'Eophiuricae belongs to Stenurida'
- 'Eophiuridae belongs to Eophiuricae'
- 'Gnathasterina belongs to Hemizonida'
- 'Hemizonida belongs to Asteroidea'
- 'Palaeocoma (Bdellacoma) was reranked as Bdellacoma and belongs to Phragmactidae'
- 'Palaeocoma (Rhopalocoma) was reranked as Rhopalocoma and belongs to Eophiuridae'
- 'Palaeura belongs to Palaeuridae'
- 'Palaeura jacobi is recombined as Pradesura jacobi'
- 'Palaeura neglecta belongs to Palaeura'
- 'Palaeuricae belongs to Stenurida'
- 'Palaeuridae belongs to Palaeuricae'
- 'Petraster belongs to Petrasteridae'
- 'Petrasteridae belongs to Pustulosa'
- 'Phanerozonia is corrected as Phanerozonida and belongs to Asteroidea'
- 'Phragmactidae belongs to Eophiuricae'
- 'Phragmactis belongs to Phragmactidae'
- 'Platyasterida belongs to Asteroidea'
- 'Pradesura belongs to Pradesuridae'
- 'Pradesuridae belongs to Eophiuricae'
- 'Ptilonaster belongs to Eophiuridae'
- 'Pustulosa belongs to Phanerozonida'
- 'Somasteroidea was reranked as a subclass and belongs to Echinodermata'
- 'Stenaster belongs to Stenasteridae'
- 'Stenasteridae belongs to Eophiuricae'
- 'Sturtzaster is corrected as Stuertzaster and belongs to Pradesuridae'
- 'Urasterina belongs to Hemizonida'
- 'Villebrunaster belongs to Chinianasteridae'
- 'Villebrunaster thorali belongs to Villebrunaster'