Arbacioida
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| Arbacioida Temporal range: Middle Jurassic–recent |
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| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Echinoidea |
| Superorder: | Echinacea |
| Order: | Arbacioida Gregory, 1900 |
| Family: | Arbaciidae Gray, 1855 |
The Arbacioida are an order of sea urchins, consisting of a single 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 test are of similar size. It contains the following genera:
- Arbacia Gray, 1835
- Arbaciella Mortensen, 1910a
- Arbia Cooke, 1948†
- Baueria Noetling, 1885†
- Codiopsis L. Agassiz, in Agassiz & Desor, 1846†
- Coelopleurus L. Agassiz, 1840a
- Cottaldia Desor, 1856 †
- Dialithocidaris A. Agassiz, 1898
- Habrocidaris A. Agassiz & Clark, 1907b
- Podocidaris A. Agassiz, 1869
- Pygmaeocidaris Döderlein, 1905
- Sexpyga Shigei, 1975
- Tetrapygus L. Agassiz, 1841b
[edit] 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 19th Dec 2009.
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