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Labidiaster Radiosus
''Labidiaster radiosus'', the fragile sticky ray star, is a large species of starfish in the family Heliasteridae and was first described by Lütken in 1871. It is found in the waters of southern South America to Sub-Antarctica and the Antarctic Peninsula. Description ''Labidiaster radiosus'' is a large starfish that can reach up to across, its color is variable in life, ranging from red-orange to purple and white. It has a round abdomen with 20-40 arms, often has a pattern of concentric circles radiating out on arms. Labidiaster radiosus may be confused with Labidiaster annulatus ''Labidiaster annulatus'', the Antarctic sun starfish or wolftrap starfish is a species of starfish in the family Heliasteridae. It is found in the cold waters around Antarctica and has a large number of slender, flexible rays. Description '' ... and the two have even been considered to be the same species. However, they can be distinguished by closely examining the pedicellaria in the centra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Labidiaster Radiosus, Otto's Encyclopedia
''Labidiaster'' is a genus of echinoderms belonging to the family Heliasteridae. The species of this genus are found in the coasts of Antarctica and southernmost South America. Species Two species are recognized: *''Labidiaster annulatus'' *''Labidiaster radiosus ''Labidiaster radiosus'', the fragile sticky ray star, is a large species of starfish in the family Heliasteridae and was first described by Lütken in 1871. It is found in the waters of southern South America to Sub-Antarctica and the Antarctic ...'' References Heliasteridae Asteroidea genera {{asteroidea-stub ... [...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 su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heliasteridae
The Heliasteridae are a family of Asteroidea (sea stars) in the order Forcipulatida. It includes two genera: ''Heliaster'' from the East Pacific (California to Chile, including offshore islands), and ''Labidiaster'' from southernmost South America, Antarctica and subantarctic oceans. Genera The World Register of Marine Species includes two genera and seven species within the family Heliasteridae: *''Heliaster'' Gray, 1840'' **''Heliaster canopus'' Perrier, 1875 **''Heliaster cumingi'' (Gray, 1840) **''Heliaster helianthus'' (Lamarck, 1816) **''Heliaster kubiniji'' Xantus, 1860 **''Heliaster microbrachius'' Xantus, 1860 **''Heliaster polybrachius'' H.L. Clark, 1907 **''Heliaster solaris'' A.H. Clark, 1920 *''Labidiaster'' Lütken, 1872'' **''Labidiaster annulatus'' Sladen, 1889 **''Labidiaster radiosus ''Labidiaster radiosus'', the fragile sticky ray star, is a large species of starfish in the family Heliasteridae and was first described by Lütken in 1871. It is found in the w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Labidiaster Annulatus
''Labidiaster annulatus'', the Antarctic sun starfish or wolftrap starfish is a species of starfish in the family Heliasteridae. It is found in the cold waters around Antarctica and has a large number of slender, flexible rays. Description ''Labidiaster annulatus'' has a wide central disc and 40 to 45 long narrow rays and can reach a diameter of . The disc is slightly inflated and is raised above the base of the rays. The madreporite is large and near the edge of the disc. The aboral or upper surface is covered in a meshed network of small slightly overlapping plates. These are covered by a membrane with numerous raised projections called papulae, some small spines and a few large triangular pedicellariae, wrench-like organs that can grasp objects. The rays are crowded together where they join the disc and their aboral surface is similarly clad in overlapping scales in a quadrangular mesh pattern. There are also short spines and many papulae and a number of small pedicellari ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 Echinoidea). Each pedicellaria is an effector organ with its own set of muscles, neuropils, and sensory receptors and is therefore capable of reflex responses to the environment. Pedicellariae are poorly understood but in some taxa, they are thought to keep the body surface clear of algae, encrusting organisms, and other debris in conjunction with the ciliated epidermis present in all echinoderms. In sea stars Types There are two major types of pedicellaria in sea stars: straight and crossed. Straight pedicellaria are typically larger and located on the body surface, whereas crossed pedicellaria are smaller and found more commonly on stalks, raised above the body surface or in clumps circling the spines. The crossed type is connected to th ... [...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 surfa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
