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Labidiaster
''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 annulatus'', the Antarctic sun starfish or wolftrap starfish is a species of starfish in the Family (biology), family Heliasteridae. It is found in the cold waters around Antarctica and has a large number of slender, flexible rays. ...'' *'' Labidiaster radiosus'' References Heliasteridae Asteroidea genera {{asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Labidiaster Annulatus
''Labidiaster annulatus'', the Antarctic sun starfish or wolftrap starfish is a species of starfish in the Family (biology), 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 sma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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 and the two have even been considered to be the same species. However, they can be distinguished by closely examining the pedicellaria A pedicellaria (: 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). ... in the central ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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 nine species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ... within the family Heliasteridae: References * Echinoderm families {{Asteroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Echinoderm
An echinoderm () is any animal of the phylum Echinodermata (), which includes starfish, brittle stars, sea urchins, sand dollars and sea cucumbers, as well as the sessile sea lilies or "stone lilies". While bilaterally symmetrical as larvae, as adults echinoderms are recognisable by their usually five-pointed radial symmetry (pentamerous symmetry), and are found on the sea bed at every ocean depth from the intertidal zone to the abyssal zone. The phylum contains about 7,600 living species, making it the second-largest group of deuterostomes after the chordates, as well as the largest marine-only phylum. The first definitive echinoderms appeared near the start of the Cambrian. Echinoderms are important both ecologically and geologically. Ecologically, there are few other groupings so abundant in 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
