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Stylaster Nobilis
''Stylaster nobilis'', the noble coral, is a branching colonial hydroid in the family Stylasteridae. Description Noble corals are pink or orange and tree-like with paler tips to the colony's branches. The calcareous colonies may grow to over 25 cm in total height, while individual polyps are 0.1 cm in diameter.Branch, G.M., Branch, M.L, Griffiths, C.L. and Beckley, L.E. 2010. ''Two Oceans: a guide to the marine life of southern Africa'' There is no free medusa stage. The polyps project from star-shaped cavities in the rigid calcareous skeleton. Growth occurs at the tips and on the outside surface, which gradually thickens and which may show concentric rings in section. Colour and shape variation File:Noble corals at Mushroom Pinnacle DSC06533.jpg, Two colour morphs at Oudekraal, on the Cape Peninsula File:Noble coral at Vulcan Rock DSC00860.jpg, Occasionally ''S. nobilis'' will develop a more encrusting structure File:Two colour morphs of noble coral at Middle Bank ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrozoa
Hydrozoa (hydrozoans; ) are a taxonomic class of individually very small, predatory animals, some solitary and some colonial, most of which inhabit saline water. The colonies of the colonial species can be large, and in some cases the specialized individual animals cannot survive outside the colony. A few genera within this class live in freshwater habitats. Hydrozoans are related to jellyfish and corals and belong to the phylum Cnidaria. Some examples of hydrozoans are the freshwater jelly (''Craspedacusta sowerbyi''), freshwater polyps ('' Hydra''), ''Obelia'', Portuguese man o' war (''Physalia physalis''), chondrophores (Porpitidae), "air fern" (''Sertularia argentea''), and pink-hearted hydroids (''Tubularia''). Anatomy Most hydrozoan species include both a polyp (zoology), polypoid and a medusa (biology), medusoid stage in their lifecycles, although a number of them have only one or the other. For example, ''Hydra'' has no medusoid stage, while ''Liriope tetraphylla, Lir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Family (biology)
Family ( la, familia, plural ') is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as the "walnut family". What belongs to a family—or if a described family should be recognized at all—are proposed and determined by practicing taxonomists. There are no hard rules for describing or recognizing a family, but in plants, they can be characterized on the basis of both vegetative and reproductive features of plant species. Taxonomists often take different positions about descriptions, and there may be no broad consensus across the scientific community for some time. The publishing of new data and opini ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stylasteridae
Stylasteridae is a family of hydrozoans. Genera According to the World Register of Marine Species, the following genera Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclat ... belong to this family: *'' Adelopora'' Cairns, 1982 *'' Astya'' Stechow, 1921d *'' Axoporella'' † *'' Calyptopora'' Boschma, 1968 *'' Cheiloporidion'' Cairns, 1983 *'' Congregopora'' Nielsen, 1919 † *'' Conopora'' Moseley, 1879 *'' Crypthelia'' Milne Edwards & Haime, 1849 *'' Cyclohelia'' Cairns, 1991 *'' Distichopora'' Lamarck, 1816 *'' Errina'' Gray, 1835 *'' Errinopora'' Fisher, 1938 *'' Errinopsis'' Broch, 1951 *'' Gyropora'' Boschma, 1960 *'' Inferiolabiata'' Broch, 1951 *'' Lepidopora'' Pourtalès, 1871 *'' Lepidotheca'' Cairns, 1983 *'' Leptohelia'' Lindner, Cairns & Zibrowius, 2014 *'' Paraerrina'' Bro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stylaster Nobilis PC132990
''Stylaster'' is a genus of hydroids in the family Stylasteridae. Species The following species are classed in this genus: * '' Stylaster alaskanus'' Fisher, 1938 * '' Stylaster amphiheloides'' Kent, 1871 * '' Stylaster antillarum'' Zibrowius & Cairns, 1982 * †'' Stylaster antiquus'' Sismondi, 1871 * '' Stylaster asper'' Kent, 1871 * '' Stylaster atlanticus'' Broch, 1936 * '' Stylaster aurantiacus'' Cairns, 1986 * '' Stylaster bellus'' (Dana, 1848) * '' Stylaster bilobatus'' Hickson & England, 1909 * '' Stylaster bithalamus'' Broch, 1936 * '' Stylaster blatteus'' (Boschma, 1961) * ''Stylaster bocki'' Broch, 1936 * '' Stylaster boreopacificus'' Broch, 1932 * '' Stylaster boschmai'' (Eguchi, 1965) * ''Stylaster brochi'' (Fisher, 1938) * ''Stylaster brunneus'' Boschma, 1970 * ''Stylaster californicus'' (Verrill, 1866) * ''Stylaster campylecus'' (Fisher, 1938) * ''Stylaster carinatus'' Broch, 1936 * †''Stylaster chibaensis'' Eguchi, 1954 * ''Stylaster cocosensis'' Cairns, 1991 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemism
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can be also be referred to as an ''endemism'' or in scientific literature as an ''endemite''. For example '' Cytisus aeolicus'' is an endemite of the Italian flora. '' Adzharia renschi'' was once believed to be an endemite of the Caucasus, but it was later discovered to be a non-indigenous species from South America belonging to a different genus. The extreme opposite of an endemic species is one with a cosmopolitan distribution, having a global or widespread range. A rare alternative term for a species that is endemic is "precinctive", which applies to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hard Coral
Scleractinia, also called stony corals or hard corals, are marine animals in the phylum Cnidaria that build themselves a hard skeleton. The individual animals are known as polyp (zoology), polyps and have a cylindrical body crowned by an oral disc in which a mouth is fringed with tentacles. Although some species are solitary, most are Colony (biology), colonial. The founding polyp settles and starts to secrete calcium carbonate to protect its soft body. Solitary corals can be as much as across but in colonial species the polyps are usually only a few millimetres in diameter. These polyps reproduce asexually by budding, but remain attached to each other, forming a multi-polyp colony of cloning, clones with a common skeleton, which may be up to several metres in diameter or height according to species. The shape and appearance of each coral colony depends not only on the species, but also on its location, depth, the amount of water movement and other factors. Many shallow-water co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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