Clypeasteroida

Translingual thumb|Clypeaster reticulatus speciesupper side (left) and underside Alternative forms mul Clypeastroida Etymology mul Clypeaster oida Proper noun order class Echinoidea sand dollars Hypernyms order ; Euechinoidea subclass - subclass; Irregularia infraclass - infraclass Hyponyms order Clypeasterina suborder, Laganina suborder, Rotulina suborder, Scutellina suborder suborders Astriclypeidae family, Clypeasteridae family, Dendrasteridae family, Echinarachniidae family, Echinocyamidae family, Fibulariidae family, Laganidae family, Mellitidae family, Rotulidae family, Scutellidae family, Taiwanasteridae family - families Coordinate terms order in Irregularia Cassiduloida order, Echinolampadoida order, Holasteroida order, Spatangoida order - orders References mul Sea urchins