Arbacioida
Arbacioida Temporal range:
| |
---|---|
Arbacia lixula | |
Scientific classification | |
Kingdom: | Animalia |
Phylum: | Echinodermata |
Class: | Echinoidea |
Order: | Arbacioida Gregory, 1900 |
Family: | Arbaciidae Gray, 1855 |
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 tests are of similar size.
Genera:
- Arbacia Gray, 1835
- Arbaciella Mortensen, 1910a
- Cooke, 1948†
- Noetling, 1885†
- Agassiz, in Agassiz & Desor, 1846†
- Coelopleurus Agassiz, 1840a
- Desor, 1856 †
- Agassiz, 1898
- Agassiz & Clark, 1907b
- Agassiz, 1869
- Döderlein, 1905
- 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". Retrieved 19 Dec 2009.
Categories:
- Arbacioida
- Extant Middle Jurassic first appearances
- Echinoidea stubs