Opinions from P. M. Kier 1980
- 'Agassizia belongs to Schizasteridae'
- 'Agassizia (Anisaster) wilmingtonica belongs to Agassizia (Anisaster)'
- 'Anisaster was reranked as Agassizia (Anisaster) and belongs to Agassizia'
- 'Breynella gregoryi is a subjective synonym of Santeelampas oviformis'
- 'Cassidulus (Pygorhynchus) carolinensis is recombined as Rhyncholampas carolinensis'
- 'Cassidulus (Rhynchopygus) holmsei is recombined as Eurhodia holmsei'
- 'Cassidulus (Rhynchopygus) ravenli is a subjective synonym of Eurhodia rugosa rugosa'
- 'Catopygus oviformis is recombined as Santeelampas oviformis'
- 'Cidarina is corrected as Cidarinae and belongs to Cidaridae'
- 'Cidaris carolinensis is recombined as Phyllacanthus carolinensis'
- 'Cidaris mitchelli is recombined as Phyllacanthus mitchelli'
- 'Cidaris pratti belongs to Cidaris'
- 'Coelopleurus belongs to Arbaciidae'
- 'Coelopleurus carolinensis belongs to Coelopleurus' according to Cooke 1941
- 'Coelopleurus carolinensis belongs to Coelopleurus'
- 'Dixieus belongs to Phymosomatidae'
- 'Echinocyamus belongs to Fibulariidae'
- 'Echinocyamus bisexus belongs to Echinocyamus'
- 'Echinocyamus parvus belongs to Echinocyamus'
- 'Echinolampas belongs to Echinolampadidae'
- 'Echinolampas appendiculatus is corrected as Echinolampas appendiculata and belongs to Echinolampas'
- 'Echinus infulatus is recombined as Coelopleurus infulatus'
- 'Eupatagus belongs to Brissidae'
- 'Eupatagus carolinensis belongs to Eupatagus'
- 'Eupatagus lawsonae belongs to Eupatagus'
- 'Eupatagus wilsoni belongs to Eupatagus'
- 'Eurhodia belongs to Pliolampadidae'
- 'Eurhodia baumi belongs to Eurhodia'
- 'Eurhodia rugosa depressa belongs to Eurhodia rugosa'
- 'Eurhodia rugosa ideali belongs to Eurhodia rugosa'
- 'Eurhodia rugosa rugosa belongs to Eurhodia rugosa' according to Ravenel 1848
- 'Hemipatagus subrostratus is recombined as Maretia subrostratus'
- 'Linthia (Linthia) harmatuki belongs to Linthia (Linthia)'
- 'Linthia hanoverensis belongs to Linthia' according to Kellum 1926
- 'Linthia hanoverensis belongs to Linthia'
- 'Linthia wilmingtonensis belongs to Linthia'
- 'Macropneustes carolinensis is recombined as Unifascia carolinensis'
- 'Maretia belongs to Spatangidae'
- 'Periarchus rutriformis is a subjective synonym of Periarchus lyelli'
- 'Periarchus rutriformis belongs to Periarchus' according to Paulson 1958
- 'Phyllacanthus belongs to Rhabdocidarinae'
- 'Phymosoma dixie is recombined as Dixieus dixie'
- 'Protoscutella belongs to Protoscutellidae'
- 'Protoscutella mississippiensis mississippiensis belongs to Protoscutella mississippiensis' according to Twitchell 1915
- 'Protoscutella mississippiensis rosehillensis belongs to Protoscutella mississippiensis'
- 'Pygorhynchus rugosus is recombined as Eurhodia rugosa'
- 'Rhabdocidarinae was reranked as a subfamily and belongs to Cidaridae'
- 'Rhyncholampas belongs to Cassidulidae'
- 'Santeelampas belongs to Pliolampadidae'
- 'Scutella lyelli is recombined as Periarchus lyelli'
- 'Scutella mississippiensis is recombined as Protoscutella mississippiensis'
- 'Sismondia conradi is recombined as Protoscutella conradi'
- 'Sismondia plana is recombined as Protoscutella plana'
- 'Unifascia belongs to Unifasciidae'