Opinions from S. K. Donovan 1993
- 'Acrosaleniidae belongs to Calycina'
- 'Arbaciadae is corrected as Arbaciidae and belongs to Arbacioida'
- 'Arbacina is corrected as Arbacioida and belongs to Echinoidea'
- 'Botriopygus rudistarum belongs to Botriopygus' according to Hawkins 1923
- 'Botriopygus rudistarum is recombined as Pygopistes rudistarum'
- 'Calycina belongs to Echinoidea'
- 'Cassiduloida belongs to Echinoidea'
- 'Cidaridae is corrected as Cidaroida and belongs to Echinoidea'
- 'Cidaridae belongs to Cidaroida'
- 'Cidarina was reranked as the unranked clade Cidarinae and belongs to Cidaridae'
- 'Goniopygus belongs to Arbacioida'
- 'Hemiaster belongs to Hemiasteroidae'
- 'Hemiasteridae is corrected as Hemiasteroidae and belongs to Spatangoida'
- 'Heterosalenia belongs to Acrosaleniidae'
- 'Holectypidae belongs to Holectypoida'
- 'Holectypoida belongs to Echinoidea'
- 'Leiocidaris leoni is recombined as Phyllacanthus leoni'
- 'Metholectypus belongs to Holectypidae'
- 'Metholectypus trechmanni belongs to Metholectypus' according to Hawkins 1923
- 'Metholectypus trechmanni belongs to Metholectypus'
- 'Nucleolitidae belongs to Cassiduloida'
- 'Phyllacanthus belongs to Cidarinae'
- 'Pygopistes belongs to Nucleolitidae'
- 'Scholiechinus axiologus belongs to Scholiechinus' according to Arnold and Clark 1927
- 'Scholiechinus axiologus belongs to Scholiechinus'
- 'Scoliechinus is corrected as Scholiechinus and belongs to Toxopneustidae'
- 'Spatangoida belongs to Echinoidea'
- 'Stereocidaris was reranked as Temnocidaris (Stereocidaris) and belongs to Temnocidaris'
- 'Temnocidaris belongs to Cidarinae'
- 'Temnopleurina was reranked as the order Temnopleuroida and belongs to Echinoidea'
- 'Toxopneustidae belongs to Temnopleuroida'