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Acanthastrea Subechinata
''Acanthastrea'' is a genus of large polyp stony corals in the family Lobophylliidae. The colonies are massive and usually flat. The corallite A corallite is the skeletal cup, formed by an individual stony coral polyp, in which the polyp sits and into which it can retract. The cup is composed of aragonite, a crystalline form of calcium carbonate, and is secreted by the polyp. Corallit ...s are either circular or angular in shape. The septa are thick near the wall of the corallite, becoming thin near the columella, and have tall teeth. The polyps are extended only at night. The genus contains the following species: * '' Acanthastrea brevis'' Milne Edwards & Haime, 1849 * '' Acanthastrea echinata'' (Dana, 1846) * '' Acanthastrea hemprichii'' (Ehrenberg, 1834) * '' Acanthastrea minuta'' Moll & Best, 1984 * '' Acanthastrea pachysepta'' (Chevalier, 1975) * '' Acanthastrea polygonalis''† Martin, 1880 * '' Acanthastrea rotundoflora'' Chevalier, 1975 * '' Acanthastrea subec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanthastrea Echinata
''Acanthastrea echinata'', commonly known as the starry cup coral, is a species of corals in the family Lobophylliidae. It is a wide-ranging species found from the western Indian Ocean, throughout the Pacific Ocean, and eastward to the southeastern Atlantic Ocean. It can inhabit any reef habitat to depths of 50 m. This species, which may become threatened with the global decline of coral reefs, is a popular coral used in aquariums. Description ''A. echinata'' colonies crustlike to very thick and reach up to about a meter across. The thick-walled, circular corallites are cerioid or subplocoid. The septa have large teeth. The skeleton is covered with a folded fleshy tissue. They are usually dull in color, coming in shades of gray, brown, or green, but some can be bright and colorful. They are a uniform color or mottled.''A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Columella (coral)
Lucius Junius Moderatus Columella (; Arabic: , 4 – ) was a prominent writer on agriculture in the Roman Empire. His ' in twelve volumes has been completely preserved and forms an important source on Roman agriculture, together with the works of Cato the Elder and Marcus Terentius Varro, both of which he occasionally cites. A smaller book on trees, ', is usually attributed to him. In 1794 the Spanish botanists José Antonio Pavón Jiménez and Hipólito Ruiz López named a genus of Peruvian asterid ''Columellia'' in his honour. Personal life Little is known of Columella's life. He was probably born in Gades, Hispania Baetica (modern Cádiz), possibly to Roman parents. After a career in the army (he was tribune in Syria in 35), he turned to farming his estates at Ardea, Carseoli, and Alba in Latium. ''De re rustica'' In ancient times, Columella's work "appears to have been but little read", cited only by Pliny the Elder, Servius, Cassiodorus, and Isidorus, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanthastrea Rotundoflora
''Acanthastrea rotundoflora'' is a species of coral found in Indo-Pacific waters from the Red Sea to Australia and the East China Sea. The species in uncommon throughout its range, and is threatened by the global loss of coral reef habitats. Description Colonies of ''Acanthastrea rotundoflora'' are either massive or encrusting. The corallites are plocoid and rather widely separated, and in small colonies there is a conspicuous central corallite. The septa have long pointed teeth. The general colour of this coral is rusty-brown, dark brown or green. Biology ''Acanthastrea rotundoflora'' is a zooxanthellate species of coral. It obtains most of its nutritional needs from the symbiotic dinoflagellates that live inside its soft tissues. These photosynthetic organisms provide the coral with organic carbon and nitrogen, sometimes providing up to 90% of their host's energy needs for metabolism and growth. Its remaining needs are met by the planktonic organisms caught by the tentac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanthastrea Polygonalis
''Acanthastrea'' is a genus of large polyp stony corals in the family Lobophylliidae. The colonies are massive and usually flat. The corallites are either circular or angular in shape. The septa are thick near the wall of the corallite, becoming thin near the columella, and have tall teeth. The polyps are extended only at night. The genus contains the following species: * '' Acanthastrea brevis'' Milne Edwards & Haime, 1849 * '' Acanthastrea echinata'' (Dana, 1846) * ''Acanthastrea hemprichii'' (Ehrenberg, 1834) * '' Acanthastrea minuta'' Moll & Best, 1984 * '' Acanthastrea pachysepta'' (Chevalier, 1975) * '' Acanthastrea polygonalis''† Martin, 1880 * '' Acanthastrea rotundoflora'' Chevalier, 1975 * ''Acanthastrea subechinata ''Acanthastrea'' is a genus of large polyp stony corals in the family Lobophylliidae. The colonies are massive and usually flat. The corallite A corallite is the skeletal cup, formed by an individual stony coral polyp, in which the polyp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanthastrea Brevis
''Acanthastrea brevis'' is a vulnerable species of stony coral found in reef habitats at depths of 1–20 m. It is threatened by habitat loss and crown-of-thorns starfish predation. It is particularly susceptible to coral bleaching and ocean acidification. Distribution It is widespread and found from the waters of Madagascar and Saudi Arabia in the Indian Ocean to Micronesia and Samoa in the Pacific. Biology ''Acanthastrea brevis'' is a zooxanthellate species of coral. It obtains most of its nutritional needs from the symbiotic dinoflagellates that live inside its soft tissues. These photosynthetic Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities. Some of this chemical energy is stored in c ... organisms provide the coral with organic carbon and nitrogen, sometimes providing up to 90% of their host's energy needs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyp (zoology)
A polyp in zoology Zoology ()The pronunciation of zoology as is usually regarded as nonstandard, though it is not uncommon. is the branch of biology that studies the animal kingdom, including the structure, embryology, evolution, classification, habits, and ... is one of two forms found in the phylum Cnidaria, the other being the medusa (biology), medusa. Polyps are roughly cylindrical in shape and elongated at the axis of the vase-shaped body. In solitary polyps, the aboral (opposite to oral) end is attached to the substrate (biology), substrate by means of a disc-like holdfast (biology), holdfast called a pedal disc, while in colony (biology), colonies of polyps it is connected to other polyps, either directly or indirectly. The oral end contains the mouth, and is surrounded by a circlet of tentacles. Classes In the class (biology), class Anthozoa, comprising the sea anemones and corals, the individual is always a polyp; in the class Hydrozoa, however, the indi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Septum (coral)
In corals, a septum (plural septa) is one of the radiating vertical plates lying within the corallite wall. Outside the corallite wall these plates are known as costae In vertebrate anatomy, ribs ( la, costae) are the long curved bones which form the rib cage, part of the axial skeleton. In most tetrapods, ribs surround the chest, enabling the lungs to expand and thus facilitate breathing by expanding the c ... (singular costa). The septa may be thick, thin or vary in size. They may have teeth which range from needle-like to blade-like and are often characteristic of different genera. References {{reflist Cnidarian anatomy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Réunion
Réunion (; french: La Réunion, ; previously ''Île Bourbon''; rcf, label= Reunionese Creole, La Rényon) is an island in the Indian Ocean that is an overseas department and region of France. It is located approximately east of the island of Madagascar and southwest of the island of Mauritius. , it had a population of 868,846. Like the other four overseas departments, Réunion also holds the status of a region of France, and is an integral part of the French Republic. Réunion is an outermost region of the European Union and is part of the eurozone. Réunion and the fellow French overseas department of Mayotte are the only eurozone regions located in the Southern Hemisphere. As in the rest of France, the official language of Réunion is French. In addition, a majority of the region's population speaks Réunion Creole. Toponymy When France took possession of the island in the seventeenth century, it was named Bourbon, after the dynasty that then ruled France. To br ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corallite
A corallite is the skeletal cup, formed by an individual stony coral polyp, in which the polyp sits and into which it can retract. The cup is composed of aragonite, a crystalline form of calcium carbonate, and is secreted by the polyp. Corallites vary in size, but in most colonial corals they are less than in diameter. The inner surface of the corallite is known as the calyx. The vertical blades inside the calyx are known as septa and in some species, these ridges continue outside the corallite wall as costae In vertebrate anatomy, ribs ( la, costae) are the long curved bones which form the rib cage, part of the axial skeleton. In most tetrapods, ribs surround the chest, enabling the lungs to expand and thus facilitate breathing by expanding the c .... Where there is no corallite wall, the blades are known as septocostae. The septa, costae and septocostae may have ornamentation in the form of teeth and may be thick, thin or variable in size. Sometimes there are paliform l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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