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Porites Cylindrica
''Porites cylindrica'', commonly known as hump coral, is a stony coral of the subclass Hexacorallia. Description ''P. cylindrica'' is a hermatypic Hermatypic corals are those corals in the order Scleractinia which build reefs by depositing hard calcareous material for their skeletons, forming the stony framework of the reef. Corals that do not contribute to coral reef development are referred ... (reef-building) coral that can grow to a few square meters wide and form micro-atolls.Hoeksema, B. (2015). Porites cylindricaDana, 1846 Accessed throughWorld Register of Marine Species Retrieved 23 August 2018. They are typically cream colored, yellow, blue, pale brown or green. Distribution and habitat ''P. cylindrica'' is common to abundant in shallow water areas 1–11 meters deep.The Encyclopedia of Earth (2012)Coral reef zonation Retrieve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hexacorallia
Hexacorallia is a Class (biology), class of Anthozoa comprising approximately 4,300 species of aquatic organisms formed of polyp (zoology), polyps, generally with 6-fold symmetry. It includes all of the stony corals, most of which are Colony (biology), colonial and reef-forming, as well as all sea anemones, and zoanthids, arranged within five extant Order (biology), orders. The hexacorallia are distinguished from another class of Anthozoa, Octocorallia, in having six or fewer axes of symmetry in their body structure; the tentacles are simple and unbranched and normally number more than eight. These organisms are formed of individual soft polyps which in some species live in colonies and can secrete a calcite skeleton. As with all Cnidarians, these organisms have a complex life cycle including a motile planktonic phase and a later characteristic Sessility (zoology), sessile phase. Hexacorallia also include the significant extinct order of rugose corals. Phylogeny Hexacorallia is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hermatypic Coral
Hermatypic corals are those corals in the order Scleractinia which build reefs by depositing hard calcareous material for their skeletons, forming the stony framework of the reef. Corals that do not contribute to coral reef development are referred to as ahermatypic (non-reef-building) species. Many reef-forming corals contain symbiotic photosynthetic zooxanthella Zooxanthellae is a colloquial term for single-celled dinoflagellates that are able to live in symbiosis with diverse marine invertebrates including demosponges, corals, jellyfish, and nudibranchs. Most known zooxanthellae are in the genus '' Sym ...e, which contribute to their nutritional needs. The term "hermatypic" is sometimes misused, being assumed to apply to all zooxanthellate corals. However, there are zooxanthellae in many non reef-forming corals; and not all hermatypic corals in shallow water contain zooxanthellae. Further, some hermatypic corals live at depths to which light cannot penetrate; they form deep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microatoll
A microatoll is a circular colony of coral, dead on the top but living around the perimeter. Growth is mainly lateral, as upward growth is limited by exposure to air. Microatolls may be up to in diameter. They are named for their resemblance to island atolls formed during the subsidence of volcanic islands, as originally suggested by Darwin (1842). They act as natural recorders of sea level, which allows the monitoring of sea level changes in response to global warming. They have also been used to quantify and date changes in relative sea level in seismically active areas, and to provide information on changes in sea surface temperature using oxygen isotope values as a proxy. Terminology The term 'microatoll' was first used by Krempf in 1927, although his description lacks a precise definition. Kuenen defined it in 1933 as "a colony of corals" with "a raised rim, more or less completely surrounding a lower, dead surface". This definition has been extended to include similar st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poritidae
Poritidae is a family of stony corals. Members of the family are colonial hermatypic (reef-building) corals. They are variable in size and form but most are massive, laminar or ramose as well as branching and encrusting. The corallites are compact with very little coenosteum covering the skeleton. The walls of the corallites and the septa are porous. J.E.N. Veron considers the family is not a natural grouping but is a miscellaneous collection of genera that do not fit well elsewhere. Genera The World Register of Marine Species includes the following genera in the family: WetWebMedia.com. Retrieved 2011-12-18. * '' Bernardpora'' Kitano & Fukami, 2014 * '' |
