| Atelostomata Temporal range: Lower Jurassic–recent PreꞒ Ꞓ O S D C P T J K Pg N | |
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| Echinocardium cordatum | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Echinoidea |
| Subclass: | Euechinoidea |
| Infraclass: | Irregularia |
| Superorder: | Atelostomata von Zittel, 1879 |
| Orders | |
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.
List of orders
- 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
References
- 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.
| Taxon identifiers | |
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| Atelostomata | |
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