|
Pterasteridae
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. 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. Genera According to the World Register of Marine Species The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive list of names of marine organisms. Content The content of the registry is edited and maintained by scientific specialist ... : * '' Amembranaster'' Golotsvan, 1998 -- 1 species * '' Benthaster'' Sladen, 1882 -- 3 species * '' Calyptraster'' Sladen, 1882 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pterasteridae
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. 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. Genera According to the World Register of Marine Species The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive list of names of marine organisms. Content The content of the registry is edited and maintained by scientific specialist ... : * '' Amembranaster'' Golotsvan, 1998 -- 1 species * '' Benthaster'' Sladen, 1882 -- 3 species * '' Calyptraster'' Sladen, 1882 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Velatida
The Velatida are an order of sea stars containing about 200 species in five families. These sea stars normally have thick bodies with large discs. Description and characteristics This order contains mostly deep or cold seas sea stars, often with a wide distribution (sometimes global). They have a pentagonal or star shape, with between 5 and 15 arms. Their skeleton is weakly developed, which confers them a good flexibility, and numerous papillae on the aboral surface allow them to breathe in poorly oxygenated waters. Their pedicellariae are often provided with spines. The smallest are Caymanostellidae (between 0,5 and 3 cm) and the biggest Pterasteridae (up to 30 cm). Taxonomy New molecular evidence now suggests a relationship between some velatid and valvatid families. List of families according to World Register of Marine Species: * Caymanostellidae Belyaev, 1974 * Korethrasteridae Danielssen & Koren, 1884 * Myxasteridae Perrier, 1885 * Pterasteridae Perrier, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pteraster Stellifer
''Pteraster'' is a genus of sea stars in the family Pterasteridae. Species The following species are listed in the World Register of Marine Species: * '' Pteraster abyssorum'' (Verrill, 1895) * '' Pteraster acicula'' (Downey, 1970) * '' Pteraster affinis'' Smith, 1876 * '' Pteraster alveolatus'' Perrier, 1894 * '' Pteraster bathami'' Fell, 1958 * ''Pteraster capensis'' Gray, 1847 * '' Pteraster caribbaeus'' Perrier, 1881 * '' Pteraster corynetes'' Fisher, 1916 * ''Pteraster coscinopeplus'' Fisher, 1910 * '' Pteraster diaphanus'' (Ludwig, 1905) * ''Pteraster educator'' Djakonov, 1958 * ''Pteraster flabellifer'' Mortensen, 1933 * ''Pteraster florifer'' Koehler, 1920 * ''Pteraster fornicatus'' Mortensen, 1933 * ''Pteraster gibber'' (Sladen, 1882) * ''Pteraster hastatus'' Mortensen, 1913 * ''Pteraster hirsutus'' (Sladen, 1882) * ''Pteraster hymenasteroides'' Djakonov, 1958 * ''Pteraster hystrix'' Harvey, 1989 * ''Pteraster ifurus'' Golotsvan, 1998 * ''Pteraster inermis'' Perrier, 18 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pteraster
''Pteraster'' is a genus of sea stars in the family Pterasteridae. Species The following species are listed in the World Register of Marine Species: * '' Pteraster abyssorum'' (Verrill, 1895) * '' Pteraster acicula'' (Downey, 1970) * '' Pteraster affinis'' Smith, 1876 * '' Pteraster alveolatus'' Perrier, 1894 * '' Pteraster bathami'' Fell, 1958 * ''Pteraster capensis'' Gray, 1847 * '' Pteraster caribbaeus'' Perrier, 1881 * '' Pteraster corynetes'' Fisher, 1916 * ''Pteraster coscinopeplus'' Fisher, 1910 * '' Pteraster diaphanus'' (Ludwig, 1905) * ''Pteraster educator'' Djakonov, 1958 * ''Pteraster flabellifer'' Mortensen, 1933 * ''Pteraster florifer'' Koehler, 1920 * ''Pteraster fornicatus'' Mortensen, 1933 * ''Pteraster gibber'' (Sladen, 1882) * ''Pteraster hastatus'' Mortensen, 1913 * ''Pteraster hirsutus'' (Sladen, 1882) * ''Pteraster hymenasteroides'' Djakonov, 1958 * ''Pteraster hystrix'' Harvey, 1989 * ''Pteraster ifurus'' Golotsvan, 1998 * ''Pteraster inermis'' Perrier, 18 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pteraster Capensis
''Pteraster capensis'' is a species of echinoderm belonging to the family Pterasteridae 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, .... The species is found in Southern Africa. References Pterasteridae Animals described in 1847 Invertebrates of Africa {{asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euretaster
''Euretaster'' is a genus of echinoderms belonging to the family Pterasteridae 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, .... The species of this genus are found in Indian and Pacific Ocean. Species: *'' Euretaster attenuatus'' *'' Euretaster cribrosus'' *'' Euretaster insignis'' References Pterasteridae Echinoderm genera {{Asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euretaster Insignis
''Euretaster insignis'', commonly known as the striking sea star, is a species of starfish in the family Pterasteridae found in the central west Pacific Ocean. It is one of only three species in the order Velatida to be found in shallow water in the tropics. The young are brooded in a cavity underneath a "supradorsal" membrane. Taxonomy and evolution This starfish was first described in 1882 by marine biologist Percy Sladen as ''Retaster insignis'', ''Retaster'' being a small segregate genus of ''Pteraster''. In 1940, the genus had to change its name after Walter Kenrick Fisher noted that the type species of ''Retaster'' he had himself designated (as Perrier, the original coiner, had failed to do so), ''Pteraster capensis'' was in fact a sound species of ''Pteraster'', which automatically made the former genus a synonym of the latter. The genus known as ''Retaster'' required a new name, and the one Fisher coined was ''Euretaster'', with ''R. insignis'' as its type species. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinoderm Families
An echinoderm () is any member of the phylum Echinodermata (). The adults are recognisable by their (usually five-point) radial symmetry, and include starfish, brittle stars, sea urchins, sand dollars, and sea cucumbers, as well as the sea lilies or "stone lilies". Adult echinoderms are found on the sea bed at every ocean depth, from the intertidal zone to the abyssal zone. The phylum contains about 7,000 living species, making it the second-largest grouping of deuterostomes, after the chordates. Echinoderms are the largest entirely marine phylum. The first definitive echinoderms appeared near the start of the Cambrian. The echinoderms are important both ecologically and geologically. Ecologically, there are few other groupings so abundant in the biotic desert of the deep sea, as well as shallower oceans. Most echinoderms are able to reproduce asexually and regenerate tissue, organs, and limbs; in some cases, they can undergo complete regeneration from a single limb. Geolog ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
