Cidaroida

== Translingual == === Etymology === Cidaris +‎ -oida === Proper noun === Cidaroida A taxonomic order within the class Echinoidea – pencil urchins, primitive sea urchins. ==== Hypernyms ==== (order): Eukaryota – superkingdom; Animalia – kingdom; Bilateria – subkingdom; Deuterostomia – infrakingdom; Deuterostomia – superphylum; Echinodermata – phylum; Echinozoa – subphylum; Echinoidea – class; Cidaroidea - subclass ==== Hyponyms ==== (order): Cidaridae, Ctenocidaridae, Histocidaridae, Psychocidaridae - families === References === Cidaroida on Wikipedia.Wikipedia Cidaroida on Wikispecies.Wikispecies Category:Cidaroida on Wikimedia Commons.Wikimedia Commons Cidaroida at World Register of Marine Species “Cidaroida”, in Paleobiology Database, 2026