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

The Atelostomata are a type 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.

• Family † Acrolusiidae Mintz, 1968
• Family † Collyritidae d'Orbigny, 1853
• Family † Disasteridae Gras, 1848
• order Holasteroida (Durham & Melville, 1957)
• order Spatangoida (L. Agassiz, 1840)
• Family † Tithoniidae Mintz, 1968

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

This article about a sea urchin is a stub. You can help Wikipedia by expanding it.

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