Irregularia
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Translingual
Etymology
Latin irrēgulāris (“irregular”) + -ia (abstract suffix).
Proper noun
Irregularia
- A taxonomic infraclass within the class Echinoidea – certain sea urchins.
Hypernyms
- (infraclass): Eukaryota – superkingdom; Animalia – kingdom; Bilateria – subkingdom; Deuterostomia – infrakingdom; Deuterostomia – superphylum; Echinodermata – phylum; Echinozoa – subphylum; Echinoidea – class; Euechinoidea - subclass
Hyponyms
- (infraclass): Cassiduloida, Clypeasteroida (sand dollars), Echinolampadoida, Holasteroida, Spatangoida (heart urchins) - orders
Coordinate terms
- (infraclass in Euechinoida): Carinacea, Acroechinoidea - infraclasses; Echinothurioida - order not placed in infraclass
References
Euechinoidea on Wikipedia.Wikipedia 
Irregularia on Wikispecies.Wikispecies 
Category:Irregularia on Wikimedia Commons.Wikimedia Commons - 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
