Paxillosida
| Paxillosida | |
|---|---|
 | |
| Luidia magnifica | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Subphylum: | Eleutherozoa |
| Class: | Asteroidea |
| Order: | Paxillosida Perrier, 1884 |
| Families | |
|
See text. | |
The Paxillosida are a large order of sea stars.
Characteristics
Paxillosida adults lack an anus and have no suckers on their tube feet. They do not develop the brachiolaria stage in their early development.[1] They possess marginal plates, and have sessile pedicellariae. They mostly inhabit soft-bottomed environments of sand or mud.[2]
Systematics
Recent analyses suggest Paxillosida may be a sister taxon of Asterina.[1] The order is divided into these families:[3]
- family Astropectinidae Gray, 1840
- family Ctenodiscidae Sladen, 1889
- family Goniopectinidae Verrill, 1889
- family Luidiidae Sladen, 1889
- family Porcellanasteridae Sladen, 1883
- family Pseudarchasteridae
- family Radiasteridae Fisher, 1916
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References
- ↑ 1.0 1.1 Matsubara, M., Komatsu, M., Araki, T., Asakawa, S., Yokobori, S.-I., Watanabe, K. & Wada, H. (2005) The phylogenetic status of Paxillosida (Asteroidea) based on complete mitochondrial DNA sequences. Molecular Genetics and Evolution, 36, 598–605
- ↑ Barnes, Robert D. (1982). Invertebrate Zoology. Philadelphia, PA: Holt-Saunders International. p. 948. ISBN 0-03-056747-5.
- ↑ MarineSpecies.org - Paxillosida Perrier, 1884