Euechinoidea

== Translingual == === Etymology === From New Latin eu- (“true”) + Echinoidea. === Proper noun === Euechinoidea A taxonomic subclass within the class Echinoidea – most extant sea urchins. ==== Hypernyms ==== (subclass): Eukaryota – superkingdom; Animalia – kingdom; Bilateria – subkingdom; Deuterostomia – infrakingdom; Deuterostomia – superphylum; Echinodermata – phylum; Echinozoa – subphylum; Echinoidea – class ==== Hyponyms ==== (subclass): Atelostomata (includes the heart urchins), Diadematacea (sea urchins with hollow spines), Echinacea (sea urchins with solid spines and rigid test), Gnathostomata (includes the sand dollars) (superorders) Acroechinoidea, Carinacea, Irregularia - infraclasses ==== Coordinate terms ==== (subclass): Cidaroidea === References === Euechinoidea on Wikipedia.Wikipedia Euechinoidea on Wikispecies.Wikispecies Category:Euechinoidea on Wikimedia Commons.Wikimedia Commons Euechinoidea at World Register of Marine Species