CLASS 1 - ASTEROIDEA
ASTROPECTEN
LUIDIA
OREASTER
ASTERINA
ASTERIAS
CLASS 2 - OPHIUROIDEA
OPHIURA
OPHIOTHRIX
OPHIODERMA
GORGONOCEPHALUS
ASTERONYX
CLASS 3 - ECHINOIDEA
HISTOCIDARIS
GONIOCIDARIS
DIADEMA
ECHINUS
ARBACIA
CLYPEASTER
ECHINARACHINUS
ECHINOCARDIUM
CLASS 4 - HOLOTHUROIDEA
CUCUMARIA
THYONE
HOLOTHURIA
ACTINOPYGA
PELAGOTHURIA
MOLPADIA
LEPTOSYNAPTA
CLASS 5 - CRINOIDEA
ANTIDON
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