Irregularia

Translingual

Etymology

Latin irrēgulāris (“irregular”) +‎ -ia (abstract suffix).

Proper noun

Irregularia

1. 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