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Valvatida
The Valvatida are an order of starfish in the class Asteroidea, which contains 695 species in 172 genera in 17 families. Description The order encompasses both tiny species, which are only a few millimetres in diameter, like those in the genus '' Asterina'', and species which can reach up to 75 cm, such as species in the genus '' Thromidia''. Almost all species in this order have five arms with tube feet. This order is primarily identified by the presence of conspicuous marginal ossicles, which characterize most of the species. Most members of this order have five arms and two rows of tube feet with suckers. Some species have paxillae and in some, the main pedicellariae are clamp-like and recessed into the skeletal plates. This group includes the cushion star, and the leather star. Families According to the World Register of Marine Species, the following families are included in Valvatida: * family Acanthasteridae Gervais, 1841 * family Archasteridae Viguier, 1878 * f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Starfish
Starfish or sea stars are star-shaped echinoderms belonging to the class Asteroidea (). Common usage frequently finds these names being also applied to ophiuroids, which are correctly referred to as brittle stars or basket stars. Starfish are also known as asteroids due to being in the class Asteroidea. About 1,900 species of starfish live on the seabed in all the world's oceans, from warm, tropical zones to frigid, polar regions. They are found from the intertidal zone down to abyssal depths, at below the surface. Starfish are marine invertebrates. They typically have a central disc and usually five arms, though some species have a larger number of arms. The aboral or upper surface may be smooth, granular or spiny, and is covered with overlapping plates. Many species are brightly coloured in various shades of red or orange, while others are blue, grey or brown. Starfish have tube feet operated by a hydraulic system and a mouth at the centre of the oral or lower surface. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asteroidea
Starfish or sea stars are star-shaped echinoderms belonging to the class Asteroidea (). Common usage frequently finds these names being also applied to ophiuroids, which are correctly referred to as brittle stars or basket stars. Starfish are also known as asteroids due to being in the class Asteroidea. About 1,900 species of starfish live on the seabed in all the world's oceans, from warm, tropical zones to frigid, polar regions. They are found from the intertidal zone down to abyssal depths, at below the surface. Starfish are marine invertebrates. They typically have a central disc and usually five arms, though some species have a larger number of arms. The aboral or upper surface may be smooth, granular or spiny, and is covered with overlapping plates. Many species are brightly coloured in various shades of red or orange, while others are blue, grey or brown. Starfish have tube feet operated by a hydraulic system and a mouth at the centre of the oral or lower surface. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Goniasteridae
Goniasteridae (the biscuit stars) constitute the largest family of sea stars, included in the order Valvatida. They are mostly deep-dwelling species, but the family also include several colorful shallow tropical species. Description Goniasteridae are usually middle-sized sea stars with a characteristic double range of marginal plates bordering the disk and arms. Most of them have five arms, often short and triangular, around a broad central disc; many species are pentagonal or subpentagonal, covered densely with granular, seed-like protuberances, hence the name of the family "seed-star" (''gonium+aster''). The aboral face is often covered with tiny spines looking like paxillae. Pedicellariae are often valvate, and the gonads are located at the interradius. Main identification keys for this group include the presence of paxillae, granules, teeth, spines, or the shape and dimensions of marginal plate. Location and habitat They occur predominantly on deep-water continental s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leilasteridae
Leilasteridae is a family of echinoderms belonging to the order Valvatida The Valvatida are an order of starfish in the class Asteroidea, which contains 695 species in 172 genera in 17 families. Description The order encompasses both tiny species, which are only a few millimetres in diameter, like those in the genu .... Genera: * '' Leilaster'' Clark, 1938 * '' Mirastrella'' Fisher, 1940 References Valvatida Echinoderm families {{asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ganeriidae
Ganeriidae is a family of echinoderms belonging to the order Valvatida The Valvatida are an order of starfish in the class Asteroidea, which contains 695 species in 172 genera in 17 families. Description The order encompasses both tiny species, which are only a few millimetres in diameter, like those in the genu .... Genera Genera: * '' Aleutiaster'' Clark, 1939 * '' Cuenotaster'' Thiéry, 1920 * '' Cycethra'' Bell, 1881 * '' Ganeria'' Gray, 1847 * '' Hyalinothrix'' Fisher, 1911 * '' Knightaster'' Clark, 1972 * '' Perknaster'' Sladen, 1889 * '' Scotiaster'' Koehler, 1907 * '' Tarachaster'' Fisher, 1913 * '' Vemaster'' Bernasconi, 1965 References {{Taxonbar, from=Q3461484 Valvatida ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaetasteridae
Chaetasteridae is a family of echinoderms belonging to the order Valvatida The Valvatida are an order of starfish in the class Asteroidea, which contains 695 species in 172 genera in 17 families. Description The order encompasses both tiny species, which are only a few millimetres in diameter, like those in the genu .... Genera: * '' Chaetaster'' Müller & Troschel, 1840 * '' Chaetasterina'' Hess, 1970 References Valvatida Echinoderm families {{asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asterodiscididae
Asterodiscididae is a family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ... of starfish. Members of the family have five short tapering arms and a wide disc. The family was first described by the Australian zoologist F.W.E. Rowe in 1977. Genera The following genera are listed in the World Register of Marine Species: * genus '' Amphiaster'' Verrill, 1868 ** '' Amphiaster insignis'' Verrill, 1868 -- East pacific * genus '' Asterodiscides'' A. M. Clark, 1974 ** '' Asterodiscides belli'' Rowe, 1977 -- Somalie ** '' Asterodiscides bicornutus'' Lane & Rowe, 2009 -- Philippines ** '' Asterodiscides cherbonnieri'' Rowe, 1985 -- Madagascar (south) ** '' Asterodiscides crosnieri'' Rowe, 1985 -- Madagascar (north) ** '' Asterodiscides culcitulus'' Rowe, 1977 -- Western Australia ** '' A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Culcita (echinoderm)
''Culcita'' is a genus of cushion stars. They are found in tropical waters. Some are kept in home aquariums. Description and characteristics These are very particular stars, plump and pillow-shaped, more or less pentagonal. Their five arms have waned to only obtuse angles (and sometimes rounded off or truncated). They can measure up to 30 cm in diameter, and are typical of Indo-Pacific coral reefs, where they feed on benthic invertebrates and coral. Two species ''Culcita novaeguineae'' and ''Culcita schmideliana'' are extremely similar and almost impossible to differentiate by sight, except that ''C. schmideliana'' has larger tubercles, that are normally absent from papular areas (though both species can also be naked). They are thus distinguished mostly by their area of distribution: ''C. schmideliana'' lives in the Indian Ocean (from Africa to the Maldives), and ''C. novaeguineae'' in Oceania and the Pacific Ocean. The third species, ''C. coriacea'', lives in the Red Se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asterinidae
The Asterinidae are a large family of sea stars in the order Valvatida. Description and characteristics These are generally small sea stars, flattened dorsally and bearing very short arms, often giving a pentagonal shape in the body ;example: ''Asterians rubens'' (except in some species possessing more than five arms). The periphery of the body is thin and formed by indistinct, tiny marginal plates. They are characterized by their aborale face formed by plates shaped like crescents, sometimes giving a "knitted" appearance to the skin. The abyssal species can be bigger, like those of the genus '' Anseropoda'', which can exceed 45 cm in diameter. Biology Most of the species are small and relatively cryptic: they are often found hidden under rocks or in crevices, for example. Several species have access to a fissiparous asexual reproduction, multiplying their reproductive potential. For that reason, some species of the genera '' Meridiastra'' and '' Aquilonastra'' can so ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hippasteria Phrygiana
''Hippasteria phrygiana'' is a sea star species, member of the Goniasteridae Goniasteridae (the biscuit stars) constitute the largest family of sea stars, included in the order Valvatida. They are mostly deep-dwelling species, but the family also include several colorful shallow tropical species. Description Goniast ... family. Description and characteristics This species grows up to 20 cm in diameter, with short arms and a large body. The upper surface is red and covered with rounded knob-like spines; the lower surface contains many macroscopic bivalved pedicellariae. Habitat and geographic range This species is incredibly widely distributed: it is present in the 3 main oceanic basins. It lives mostly in cold and deep waters. Biology This species feeds mostly on cnidarians, especially deep-sea corals. See also References External links Habitas entryCatalog of Life entryNational Center for Biotechnology Information search Hippasteria Animals desc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanthasteridae
''Acanthaster'' is a bitypic genus of large and venomous starfish placed in its own family, Acanthasteridae. Its two members are known as crown-of-thorns starfish. Acanthaster are native to coral reefs in Indo-Pacific region. The species in this genus are a contributor to coral reef degradation because they prey on a large amount of live coral at high density. Species These species are listed in the World Register of Marine Species: *'' Acanthaster brevispinus'' Fisher, 1917 *''Acanthaster planci'' (Linnaeus, 1758) Some sources add ''Acanthaster ellisi'', (Gray, 1840) but it is now considered as a subspecies of ''A. planci'' in the eastern Pacific. Recent molecular work has suggested that ''Acanthaster planci'' is a species complex of up to 4 different species that have yet to be separately described (Vogler et al., 2008). Haszprunar, Vogler & Wörheide (2017) suggest to split "''A. planci''" in : * ''Acanthaster planci'' (Linnaeus, 1758) -- Northern Indian Ocean, always ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asteropseidae
Asteropseidae is a family of sea stars Starfish or sea stars are star-shaped echinoderms belonging to the class Asteroidea (). Common usage frequently finds these names being also applied to ophiuroids, which are correctly referred to as brittle stars or basket stars. Starfish ar .... Members of the family have relatively broad discs and five short tapering arms. Genera The following genera are listed in the World Register of Marine Species: *'' Asteropsis'' Müller & Troschel, 1840 *'' Dermasterias'' Perrier, 1875 *'' Petricia'' Gray, 1847 *'' Poraniella'' Verrill, 1914 *'' Valvaster'' Perrier, 1875 Gallery Image:Asteropsis carinifera.jpg, '' Asteropsis carinifera'' Image:Leather star fish.jpg, '' Dermasterias imbricata'' Image:Petricia vernicina P2143547.JPG, '' Petricia vernicina'' Image:Poraniella echinulata.jpg, '' Poraniella echinulata'' References Echinoderm families {{Asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
