Biology:Arbacioida
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Short description: Order of sea urchins
| Arbacioida | |
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| Arbacia lixula | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Echinoidea |
| Superorder: | Echinacea |
| Order: | Arbacioida Gregory, 1900 |
| Family: | Arbaciidae Gray, 1855 |
Arbacioida are an order of sea urchins, consisting of a single extant family, the Arbaciidae. They are distinguished from other sea urchins by the presence of five separate plates around the anus. Unlike their close relatives, the Salenioida, all of the tubercles on their tests are of similar size.
Genera:
- Arbacia Gray, 1835
- Arbaciella Mortensen, 1910a
- Arbia Cooke, 1948†
- Baueria Noetling, 1885†
- Codiopsis Agassiz, in Agassiz & Desor, 1846†
- Coelopleurus Agassiz, 1840a
- Cottaldia Desor, 1856 †
- Dialithocidaris Agassiz, 1898
- Habrocidaris Agassiz & Clark, 1907b
- Hattopsis Ali, 1992†
- Podocidaris Agassiz, 1869
- Pygmaeocidaris Döderlein, 1905
- Sexpyga Shigei, 1975
- Tetrapygus Agassiz, 1841b
References
- Barnes, Robert D. (1982). Invertebrate Zoology. Philadelphia, PA: Holt-Saunders International. p. 980. ISBN 0-03-056747-5.
- National History Museum. "Arbacioida". http://www.nhm.ac.uk/research-curation/research/projects/echinoid-directory/taxa/taxon.jsp?id=1247. Retrieved 19 Dec 2009.
Wikidata ☰ Q2380967 entry
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