Pterasteridae
| Pterasteridae Temporal range:
| |
|---|---|
| File:Starfish at Tafelberg deep DSC09595.JPG | |
| Pteraster capensis | |
| Scientific classification Edit this classification | |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Asteroidea |
| Order: | Velatida |
| Family: | Pterasteridae Perrier, 1875 |
| Genera[1] | |
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See text | |
Pterasteridae is a family of sea stars in the order Velatida, consisting of eight genera.
Description and characteristics
[edit | edit source]Pterasterids are primarily deep-water, and have an inflated aboral surface. Like many other members of the ordo Velatida, they have a hole in the middle of the central disc called "osculum", from which they can expel mucus for defending against predators.[2]
Many species brood their young in an internal chamber flushed with seawater.
Fossil pterasterids have been found as early as the upper Campanian of the Cretaceous period.[3]
Genera
[edit | edit source]According to the World Register of Marine Species :
- Amembranaster Golotsvan, 1998 -- 1 species
- Benthaster Sladen, 1882 -- 3 species
- Calyptraster Sladen, 1882 -- 5 species
- Diplopteraster Verrill, 1880 -- 7 species
- Euretaster Fisher, 1940 -- 3 species
- Hymenaster Thomson, 1873 -- 51 species
- Hymenasterides Fisher, 1911 -- 2 species
- Pteraster Müller & Troschel, 1842 -- 46 species
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Hymenaster echinulatus (both faces)
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Hymenaster sp.
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Pteraster stellifer (both faces)
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Pteraster sp.
References
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External links
[edit | edit source]- File:Wikispecies-logo.svg Data related to Pterasteridae at Wikispecies
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