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Primnoa Bisquama
''Primnoa'' also known as red tree coral, is a genus of soft corals and the type genus of the family Primnoidae . They are sessile, benthic cnidarians that can be found in the North Pacific, North Atlantic, and Subantarctic South Pacific, and its members often play a vital ecological role as keystone species within their environment as a habitat and refuge for the megafauna that also inhabit those regions. This, in combination with their slow growth, makes the increasing disturbance to their habitats caused by fishing activities particularly impactful and difficult to recover from. Etymology The name ''Primnoa'' derives from the Greek word Πρυμνὼ (''Prymno''), the name of an Oceanid. The name itself is derived from πρυμνός (''prymnos''), meaning “last”, “lowest”, and by extension, “deepest”. Taxonomy The genus ''Primnoa'' was first described by Jean Vincent Félix Lamouroux in 1812. In the 19th and 20th century, several more species were propose ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greek Language
Greek (, ; , ) is an Indo-European languages, Indo-European language, constituting an independent Hellenic languages, Hellenic branch within the Indo-European language family. It is native to Greece, Cyprus, Italy (in Calabria and Salento), southern Albania, and other regions of the Balkans, Caucasus, the Black Sea coast, Asia Minor, and the Eastern Mediterranean. It has the list of languages by first written accounts, longest documented history of any Indo-European language, spanning at least 3,400 years of written records. Its writing system is the Greek alphabet, which has been used for approximately 2,800 years; previously, Greek was recorded in writing systems such as Linear B and the Cypriot syllabary. The Greek language holds a very important place in the history of the Western world. Beginning with the epics of Homer, ancient Greek literature includes many works of lasting importance in the European canon. Greek is also the language in which many of the foundational texts ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Symbiodinium
''Symbiodinium'' is a genus of dinoflagellates that encompasses the largest and most prevalent group of endosymbiotic dinoflagellates known and have photosymbiotic relationships with many species. These unicellular microalgae commonly reside in the endoderm of tropical cnidarians such as corals, sea anemones, and jellyfish, where the products of their photosynthesis, photosynthetic processing are exchanged in the host for inorganic molecules. They are also harbored by various species of demosponges, flatworms, mollusks such as the giant clams, foraminifera (Soritoidea, soritids), and some ciliates. Generally, these dinoflagellates enter the host cell through phagocytosis, persist as intracellular symbionts, reproduce, and disperse to the environment. The exception is in most mollusks, where these symbionts are intercellular (between the cells). Cnidarians that are associated with ''Symbiodinium'' occur mostly in warm oligotrophic (nutrient-poor), Marine habitats, marine environmen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calcite
Calcite is a Carbonate minerals, carbonate mineral and the most stable Polymorphism (materials science), polymorph of calcium carbonate (CaCO3). It is a very common mineral, particularly as a component of limestone. Calcite defines hardness 3 on the Mohs scale of mineral hardness, based on Scratch hardness, scratch hardness comparison. Large calcite crystals are used in optical equipment, and limestone composed mostly of calcite has numerous uses. Other polymorphs of calcium carbonate are the minerals aragonite and vaterite. Aragonite will change to calcite over timescales of days or less at temperatures exceeding 300 °C, and vaterite is even less stable. Etymology Calcite is derived from the German , a term from the 19th century that came from the Latin word for Lime (material), lime, (genitive ) with the suffix ''-ite'' used to name minerals. It is thus a Doublet (linguistics), doublet of the word ''wikt:chalk, chalk''. When applied by archaeology, archaeologists and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scleractinia
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 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 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 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 corals contain symbiont unicellular organis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aragonite
Aragonite is a carbonate mineral and one of the three most common naturally occurring crystal forms of calcium carbonate (), the others being calcite and vaterite. It is formed by biological and physical processes, including precipitation from marine and freshwater environments. The crystal lattice of aragonite differs from that of calcite, resulting in a different crystal shape, an orthorhombic crystal system with acicular crystal. Repeated twinning results in pseudo-hexagonal forms. Aragonite may be columnar or fibrous, occasionally in branching helictitic forms called ''flos-ferri'' ("flowers of iron") from their association with the ores at the Carinthian iron mines. Occurrence The type location for aragonite is Molina de Aragón in the Province of Guadalajara in Castilla-La Mancha, Spain, for which it was named in 1797. Aragonite is found in this locality as cyclic twins inside gypsum and marls of the Keuper facies of the Triassic. This type of aragoni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Close Up Of Primnoa Pacifica
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Primnoa Wingi Specimen
''Primnoa'' also known as red tree coral, is a genus of soft corals and the type genus of the family Primnoidae . They are sessile, benthic cnidarians that can be found in the North Pacific, North Atlantic, and Subantarctic South Pacific, and its members often play a vital ecological role as keystone species within their environment as a habitat and refuge for the megafauna that also inhabit those regions. This, in combination with their slow growth, makes the increasing disturbance to their habitats caused by fishing activities particularly impactful and difficult to recover from. Etymology The name ''Primnoa'' derives from the Greek word Πρυμνὼ (''Prymno''), the name of an Oceanid. The name itself is derived from πρυμνός (''prymnos''), meaning “last”, “lowest”, and by extension, “deepest”. Taxonomy The genus ''Primnoa'' was first described by Jean Vincent Félix Lamouroux in 1812. In the 19th and 20th century, several more species were proposed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Primnoa Pacifica With Crab
''Primnoa'' also known as red tree coral, is a genus of soft corals and the type genus of the family Primnoidae . They are sessile, benthic cnidarians that can be found in the North Pacific, North Atlantic, and Subantarctic South Pacific, and its members often play a vital ecological role as keystone species within their environment as a habitat and refuge for the megafauna that also inhabit those regions. This, in combination with their slow growth, makes the increasing disturbance to their habitats caused by fishing activities particularly impactful and difficult to recover from. Etymology The name ''Primnoa'' derives from the Greek word Πρυμνὼ (''Prymno''), the name of an Oceanid. The name itself is derived from πρυμνός (''prymnos''), meaning “last”, “lowest”, and by extension, “deepest”. Taxonomy The genus ''Primnoa'' was first described by Jean Vincent Félix Lamouroux in 1812. In the 19th and 20th century, several more species were proposed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Narella
''Narella'' (Gray, 1870) is a genus of deep-sea Alcyonacea, soft corals in the family Primnoidae (Milne Edwards, 1857). They are Sessility (motility), sessile, Benthic zone, bottom-dwelling organisms that can be found in all ocean basins, having cosmopolitan distribution. They have a branching appearance. History Etymology The name ''Narella'' is believed to be derived from the latin ''nares,'' meaning nostril, due to the resemblance of the rows of polyps to small noses. Discovery The present understanding of ''Narella'' and its members was only established in the late 20th century. Prior to that, many members of ''Narella'' were categorized into other genera. While the genus itself was described in 1870 by John Edward Gray, the first species in the genus was described in 1860, ''Primnoa regularis'' (now recognized as ''Narella regularis''). In 1887 several new species of ''Narella'' were discovered by Edward Percival WEdward Wright and Théophile Rudolphe Studer, Théophi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valid Name (zoology)
In zoological nomenclature, the valid name of a taxon is the correct scientific name for that taxon. The valid name must be used for that taxon, regardless of any other name that may currently be used for that taxon, or may previously have been used. A name can only be valid (or invalid) when it is an available name under the International Code of Zoological Nomenclature (ICZN); if a name is unavailable, then it cannot be considered either valid or invalid. In contrast, a name which is available but not the correct name for a taxon is known as an invalid name. There are two categories of invalid names. Subjectively invalid names Subjectively invalid names are names that have been rendered invalid by individual scientific judgement or opinion. Taxonomists may differ in their opinion, and names considered invalid by one researcher may be considered valid by another. They include: :* Junior subjective synonyms – synonyms described from different types, which were previousl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
