Paxillosida
Order of starfishes
From Wikipedia, the free encyclopedia
The Paxillosida are a large order of sea stars.
| Paxillosida | |
|---|---|
| |
| Luidia magnifica | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Asteroidea |
| Superorder: | Valvatacea |
| Order: | Paxillosida Perrier, 1884 |
| Families | |
|
See text | |
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 Benthopectinidae Verrill, 1899
- family Ctenodiscidae Sladen, 1889
- family Goniopectinidae Verrill, 1889
- family Luidiidae Sladen, 1889
- family Paleobenthopectinidae Blake, 1984 †
- family Porcellanasteridae Sladen, 1883
- family Pseudarchasteridae Sladen, 1889
- family Radiasteridae Fisher, 1916
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