Opinions from W. L. Bryant 1932
- 'Acanthaspida belongs to Arthrodira'
- 'Arthrodira belongs to Placodermi'
- 'Bulbocanthus belongs to Ptyctodontidae'
- 'Bulbocanthus rugosus belongs to Bulbocanthus'
- 'Cardipeltis belongs to Pteraspidae'
- 'Cardipeltis wallacii belongs to Cardipeltis'
- 'Coccosteidae belongs to Arthrodira'
- 'Coccosteus belongs to Coccosteidae'
- 'Coccosteus chamberlini belongs to Coccosteus'
- 'Cyrtaspis belongs to Pteraspidae'
- 'Cyrtaspis ovatus belongs to Cyrtaspis'
- 'Dipnoi belongs to Teleostomi'
- 'Dipteridae belongs to Dipnoi'
- 'Dipterus belongs to Dipteridae'
- 'Elasmobranchii was reranked as a unranked clade and belongs to Pisces'
- 'Euryaspis belongs to Acanthaspida'
- 'Euryaspis brachycephalus belongs to Euryaspis'
- 'Glossoidaspis belongs to Pteraspidae'
- 'Glossoidaspis giganteus belongs to Glossoidaspis'
- 'Heterostraci was reranked as a order and belongs to Pteraspidomorphi'
- 'Onchus belongs to Ptyctodontidae'
- 'Onchus penetrans belongs to Onchus'
- 'Ostracodermi was reranked as a class and belongs to Chordata'
- 'Placodermi was reranked as a subclass and belongs to Elasmobranchii'
- 'Pteraspididae is corrected as Pteraspidae and belongs to Heterostraci'
- 'Pteraspidomorphi was reranked as a subclass and belongs to Ostracodermi'
- 'Pteraspis belongs to Pteraspidae'
- 'Pteraspis bucheri belongs to Pteraspis'
- 'Pteraspis dorfi belongs to Pteraspis'
- 'Ptyctodontidae belongs to Selachii'
- 'Selachii belongs to Elasmobranchii'
- 'Svalbardaspis belongs to Acanthaspida'
- 'Svalbardaspis montanus belongs to Svalbardaspis'
- 'Teleostomi was reranked as a unranked clade and belongs to Pisces'