Paxillosida
From Infogalactic: the planetary knowledge core
| Paxillosida | |
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| File:Luidia magnifica.jpg | |
| Luidia magnifica | |
| Scientific classification | |
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| Phylum: | |
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Paxillosida
Perrier, 1884
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| Families | |
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See text. |
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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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Astropecten aranciacus Sardegna09 28cm 5520.jpg
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Purple and Orange Starfish on the Beach (2884079538).jpg
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Astropecten bispinosus Sardegna06 3284.jpg
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Astropecten irregularis pentacanthus Sardegna09 17cm 5962.jpg
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Astropecten jonstoni Naxos08 1832 640x480 dpi90.jpg
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Astropecten platyacanthus Sardegna09 e cm09 5503.jpg
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Starfish.Egypt.JPG
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Nine-armed Sea Star (Luidia senegalensis) (4338628827).jpg
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Luidia australiae.jpg
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
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ MarineSpecies.org - Paxillosida Perrier, 1884
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