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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] |
Callopatiria
''Callopatiria'' is a genus of starfish of the family Asterinidae. Characteristics Members of the genus ''Callopatiria'' have five long, narrow rays, rounded on the upper surface and tapering to a rounded tip. The body is flat on the oral (under) surface but convex on the aboral (upper) surface. The plates on the rays are irregular and are covered by numerous glassy spinelets, finger-like on the primary plates and narrowly conical on the secondary plates. No pedicellaria A pedicellaria (plural: pedicellariae) is a small wrench- or claw-shaped appendage with movable jaws, called valves, commonly found on echinoderms (phylum Echinodermata), particularly in sea stars (class Asteroidea) and sea urchins (class Echinoi ...e are present and the papular spaces are large with numerous papulae. Species * '' Callopatiria cabrinovici'' O'Loughlin, 2009 * '' Callopatiria formosa'' (Mortensen, 1933) * '' Callopatiria granifera'' (Gray, 1847) References Asterinidae {{Asteroidea- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parvulastra
''Parvulastra'' is a genus of starfish belonging to the family Asterinidae. The species of this genus are found in Southern Hemisphere. The genus shows an unusual reproductive mode within Asterinidae: ''Parvulastra parvivipara'' and '' Parvulastra vivipara'' are viviparous. Prior to their description as distinct species, they were considered variants of '' Parvulastra exigua'', which has free-living (but non-feeding) larvae. Species There are five species: *'' Parvulastra calcarata'' *'' Parvulastra dyscrita'' *'' Parvulastra exigua'' *''Parvulastra parvivipara ''Parvulastra parvivipara'' is a very small species of starfish in the family Asterinidae. It is a viviparous species and gives birth to live young. It lives in rock pools on intertidal granite rocks in a limited area of South Australia. Descrip ...'' *'' Parvulastra vivipara'' References Asterinidae Asteroidea genera {{asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nepanthia
''Nepanthia'' is a genus of starfish of the family Asterinidae. Members of the genus have four to seven rays and are found in the eastern Pacific Ocean, ranging from Burma and Indonesia to Australia. Characteristics Members of the genus ''Nepanthia'' are characterized by having four to seven rays that are narrowly flat actinally (underneath), sub-cylindrical and tapering with the marginal edge weakly angular. Pedicellariae are present as are transactinal plates and superactinal plates. The plates on the rays are not in series, there is usually a single papula per space, the spines are fine, glassy but not needle-shaped and the superomarginal plates are irregular. The type species is '' Nepanthia maculata'' Gray, 1840. Distribution Members of the genus are found at depths down to about in Australia, Lord Howe Island, Indonesia, the Timor Sea, New Guinea, West Indonesia, the Philippines, Vietnam, Burma and the Mergui Archipelago The Mergui Archipelago (also Myeik Archipelago ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aquilonastra
''Aquilonastra'' is a genus of small sea stars within the family Asterinidae. It has over 20 described species. Description ''Aquilonastra'' has generally five rays, except fissiparous species which have five to eight ones. It looks like a star, as inter-radial margins are deeply incurved. List of species According to World Register of Marine Species and O'Loughlin & Rowe 2006:. * '' Aquilonastra anomala'' (H.L. Clark, 1921) * '' Aquilonastra batheri'' (Goto, 1914) * '' Aquilonastra burtoni'' (Gray, 1840) * '' Aquilonastra byrneae'' O'Loughlin & Rowe, 2006 * '' Aquilonastra cepheus'' (Muller & Troschel, 1842) * '' Aquilonastra chantalae'' O'Loughlin & MacKenzie, 2013 * '' Aquilonastra colemani'' O'Loughlin & Rowe, 2006 * '' Aquilonastra conandae'' O'Loughlin & Rowe, 2006 * '' Aquilonastra corallicola'' (Marsh, 1977) * '' Aquilonastra coronata'' (von Martens, 1866) * '' Aquilonastra doranae'' O'Loughlin & Rowe, 2006 * '' Aquilonastra halseyae'' O'Loughlin & Rowe, 2006 * '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Star
Starfish or sea stars are Star polygon, star-shaped echinoderms belonging to the class (biology), class Asteroidea (). Common usage frequently finds these names being also applied to brittle star, 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, tropics, tropical zones to frigid, polar regions of Earth, polar regions. They are found from the intertidal zone down to abyssal zone, 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 fee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paranepanthia
''Paranepanthia'' is a genus of starfish of the family Asterinidae. Members of the genus have five rays and are found in the waters around Australia, Indonesia and Antarctic New Zealand. Characteristics Members of the genus ''Paranepanthia'' are characterized by having five medium-length, broad-based rays that are narrowly flat on the oral (under) surface, with pointed or rounded ends. Pedicellariae are not present and the papular spaces are large with several small papulae. The marginal plates are in regular series, with tufts of short, needle-shaped spinelets, but the plates on the aboral (upper) surface are irregular. The type species In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen ... is '' Nepanthia platydisca'' Fisher, 1913. Distribution Members of the genus are found at dept ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptasterina
''Cryptasterina'' is a genus of starfish belonging to the family Asterinidae. They occur in the Indian and Western Pacific Oceans. The genus shows both viviparity and oviparity Oviparous animals are animals that lay their eggs, with little or no other embryonic development within the mother. This is the reproductive method of most fish, amphibians, most reptiles, and all pterosaurs, dinosaurs (including birds), and m .... The latter is the ancestral mode of reproduction. Species There are three species: References Asterinidae Asteroidea genera {{asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asterina (starfish)
''Asterina'' is a genus of asteroideans in the family Asterinidae. The species occurring in Australian waters are considered to not be congeneric with the type species ''A. gibbosa'' ( Pennant, 1777) by Rowe and Gates (1995), and will possibly to assigned to another genus or a new genus. Rowe and Gates (1995) also suggested that ''Asterina'' should be restricted to Atlantic waters.Rowe, F. & Gates, J. (1995). Echinodermata. In Wells, A. (Ed.), ''Zoological Catalogue of Australia'', Volume 33. Melbourne: CSIRO Australia. Species *'' Asterina fimbriata'' Perrier, 1875Perrier, E. (1875). ''Revision de la Collection de Stellerides du Museum d'Histoire Naturelle de Paris''. Paris: C. Reinwald. *''Asterina gibbosa'' ( Pennant, 1777) Pennant, T. (1777). ''British Zoology. Vol. IV. Crustacea. Mollusca. Testacea''. London: Benj. White. *'' Asterina gracilispina'' Clark, 1923Clark, H. L. (1923). The echinoderm fauna of South Africa. ''Annals of the South African Museum'', 13, 221–435. * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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] |
Patiria
''Patiria'' is a genus of starfish in the family 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: ... from the Pacific Ocean. Species ''Patiria'' contains the following species: References Asterinidae Asteroidea genera Taxa named by John Edward Gray {{Asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stegnaster Inflatus
''Stegnaster inflatus'' is a sea star of the family Asterinidae, endemic to New Zealand New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 smaller islands. It is the sixth-largest island count .... References * Miller M & Batt G, ''Reef and Beach Life of New Zealand'', William Collins (New Zealand) Ltd, Auckland, New Zealand 1973 NIWA External links * Asterinidae Echinoderms of New Zealand Taxa named by Frederick Hutton (scientist) Animals described in 1872 {{Asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asterina Pancerii
''Asterina pancerii'', commonly known as the seagrass asterina, is a species of starfish in the family Asterinidae. It is native to shallow parts of the Mediterranean Sea where it is usually found in seagrass meadows. Description ''Asterina pancerii'' is a very small starfish, seldom exceeding in diameter. It is pentagonal with five short, broad arms scarcely differentiated from the disc. The somewhat inflated aboral (upper) surface is covered by a mosaic of tiled plates each bearing a small tuft of three to eight regularly spaced crystalline spines. The marginal plates are fine, some bearing pedicellariae, and the tips of the arms have long, slender sensory tube feet and inconspicuous eyespots. The aboral surface is a radially symmetric star-shape of red, pink, purple and white plates; the oral (under) surface is a plain colour matching the main colour of the aboral surface. Distribution and habitat ''Asterina pancerii'' is endemic to the Mediterranean Sea. It is most common o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
