Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Echinodermata
Subphylum: Eleutherozoa
Superclassis: Asterozoa
Classis: Asteroidea
Ordo: Velatida
Familia: Pterasteridae
Genera (8): Amembranaster – Benthaster – Calyptraster – Diplopteraster – Euretaster – Hymenaster – Hymenasterides – Pteraster
Name
Pterasteridae Perrier, 1875
References
Links
Pterasteridae in the World Register of Marine Species
Pterasteridae is a family of sea stars in the order Velatida, consisting of eight genera.
Description and characteristics
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
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
Euretaster insignis
Hymenaster echinulatus (both faces)
Hymenaster sp.
Pteraster stellifer (both faces)
Pteraster sp.
References
Mah, C.L. "Pterasteridae Perrier, 1875". World Asteroidea Database. Retrieved 27 March 2014.
Mah, Christopher L. "Pteraster & kin- Starfish that fight back with mucus!". Echinoblog.
Villier, Loïc; Blake, Daniel B.; Jagt, John W. M.; Kutscher, Manfred (2004). "A preliminary phylogeny of the Pterasteridae (Echinodermata, Asteroidea) and the first fossil record: Late Cretaceous of Germany and Belgium". Paläontologische Zeitschrift. 78 (2): 281–299. doi:10.1007/BF03009226.
Retrieved from "http://en.wikipedia.org/"
All text is available under the terms of the GNU Free Documentation License
