Atelostomata

Atelostomata Temporal range: Lower Jurassic–recent PreꞒ Ꞓ O S D C P T J K Pg N
Echinocardium cordatum
Scientific classification
Kingdom:	Animalia
Phylum:	Echinodermata
Class:	Echinoidea
Superorder:	Atelostomata von Zittel, 1879
Orders
Cassiduloida Holasteroida Spatangoida

The Atelostomata are a superorder of sea urchins. They are distinguished from other sea urchins by their irregular shape and the absence of a feeding lantern. The group includes the well known heart urchins, as well as some less familiar and extinct forms.

List of orders

• order Holasteroida (Durham & Melville, 1957)
• order Spatangoida (L. Agassiz, 1840)

References

• Barnes, Robert D. (1982). Invertebrate Zoology. Philadelphia, PA: Holt-Saunders International. p. 981. ISBN 0-03-056747-5. 
• WoRMS. A. Kroh & R. Mooi, ed. "Atelostomata". World Echinoidea Database. World Register of Marine Species.