Cassiduloida

== Translingual == === Etymology === Cassidulus +‎ -ida === Proper noun === Cassiduloida A taxonomic order within the class Echinoidea – certain sea urchins, most extinct since the Mesozoic. ==== Hypernyms ==== (order): Eukaryota – superkingdom; Animalia – kingdom; Bilateria – subkingdom; Deuterostomia – infrakingdom; Deuterostomia – superphylum; Echinodermata – phylum; Echinozoa - subphylum; Echinoidea - class ==== Hyponyms ==== (order): Apatopygidae, Cassidulidae, Echinolampadidae, Neolampadidae, Pliolampadidae - families === References === Cassiduloida on Wikipedia.Wikipedia Cassiduloida on Wikispecies.Wikispecies Category:Cassiduloida on Wikimedia Commons.Wikimedia Commons Cassiduloida at World Register of Marine Species Cassiduloida at Integrated Taxonomic Information System. Cassiduloida at the Tree of Life Web Project Cassiduloida at National Center for Biotechnology Information “Cassiduloida”, in Paleobiology Database, 2026 Ruggiero MA, Gordon DP, Orrell TM, Bailly N, Bourgoin T, Brusca RC, et al. (2015) A Higher Level Classification of All Living Organisms. PLoS ONE 10(4): e0119248. PMID 25923521, →DOI