Subphylum Echinozoa
Class Echinoidea(regular)
Phymosoma ( )
Cidarus ( )
(irregular)
Eupatagus( )
Encope ( )
Epiaster( )
Subphylum Blastozoa
Class Blastoidea
Pentremites ( )
Return to Paleontology Syllabus
Return to Kevin McCartney's homepage