Spinulosida
| Spinulosida | |
|---|---|
 | |
| Echinaster sepositus | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Subphylum: | Eleutherozoa |
| Class: | Asteroidea |
| Order: | Spinulosida Perrier, 1884 |
| Families | |
|
| |
The Spinulosida are an order of sea stars containing at least 120 species in seven genera and two families.
Spinulosids completely lack pedicellariae and have a delicate skeletal arrangement. Their name comes from the presence of numerous low spines on the aboral (upper) surface.[1] No fossil spinulosids have yet been found.[2]
Taxonomy
According to World Register of Marine Species:[3]
- family Echinasteridae Verrill, 1870
References
- ↑ Barnes, Robert D. (1982). Invertebrate Zoology. Philadelphia, PA: Holt-Saunders International. p. 948. ISBN 0-03-056747-5.
- ↑ "Asterozoa: Fossil groups: SciComms 05-06: Earth Sciences". Palaeo.gly.bris.ac.uk. 2005-11-22. Retrieved 2010-07-30.
- ↑ "The World Asteroidea Database - Mithrodiidae". Marinespecies.eu. Retrieved 2010-07-30.