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Tridacninae
Tridacnidae, common name the giant clams, is a taxonomic subfamily of very large saltwater clams, marine bivalve molluscs in the family Cardiidae, the cockles. Description This subfamily contains the largest living bivalve species, including ''Tridacna gigas'', the giant clam. They have heavy shells, fluted with 4–6 folds. The mantle is usually brightly colored. They inhabit coral reefs in warm seas in the Indo-Pacific region. Most of these clams live in symbiosis with photosynthetic dinoflagellates ( zooxanthellae), a type of photosymbiosis. Systematics Sometimes the giant clams are still treated as a separate family Tridacnidae, but modern phylogenetic analyses included them in the family Cardiidae as a subfamily. Two recent genera and eight species are known: * ''Hippopus''—2 species * ''Tridacna''—10 species Recent genetic evidence has shown them to be monophyletic sister taxa. Image:Hippopus hippopus Vanuatu 01.jpg, Live '' Hippopus hippopus'' (Vanuatu) Image: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hippopus Hippopus
''Hippopus hippopus'', also known as the Horse Hoof clam and Strawberry clam, is a species of giant clam in the Subfamily Tridacninae and the genus ''Hippopus''. ''Hippopus'' is a delicacy in many Southeast Asian countries due to its high quality meat. The scientific name ''hippopus'' comes from Ancient Greek for "horse foot" (ἵππος, hippos, "horse", and πούς, pous, "foot"). Distribution and habitat ''H. hippopus'' is found in tropical waters of the Indian and Pacific Oceans. It is commonly found on the coast of Indonesia and Palau. Its range extends as far as India in the Indian Ocean, and Kiribati in the Pacific Ocean. ''H. hippopus'' frequently inhabits the shallow waters of fringing, barrier reefs, and seagrass beds. Because ''H. hippopus'' inhabits the shallow water, its symbiotic inhabitants can use sunlight to perform photosynthesis for the clam. ''H. Hippopus'' does not attach to rocks in the reef, instead, they settle on sandy patches, detached from any ree ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hippopus
''Hippopus'' is a genus of large tropical saltwater clams, Marine (ocean), marine bivalve molluscs in the subfamily Tridacninae, the giant clam subfamily, of the family Cardiidae.MolluscaBase eds. (2021). MolluscaBase. Hippopus Lamarck, 1799. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=205218 on 2021-03-05 Species * ''Hippopus hippopus'' (Linnaeus, 1758)(Bear paw clam) * ''Hippopus porcellanus'' Rosewater, 1982 (China clam) ;Species brought into synonymy: * ''Hippopus brassica '' Bosc, 1801 accepted as ''Hippopus hippopus'' (Linnaeus, 1758) * ''Hippopus equinus'' Mörch, 1853 accepted as ''Hippopus hippopus'' (Linnaeus, 1758) * ''Hippopus maculatus'' Lamarck, 1801 accepted as ''Hippopus hippopus'' (Linnaeus, 1758) References * Neo M.L., Wabnitz C.C.C., Braley R.D., Heslinga G.A., Fauvelot C., Van Wynsberge S., Andrefouet S., Waters C., Shau-Hwai Tan A., Gomez E.D., Costello M.J. & Todd P.A. (2017). Giant Clams ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tridacna Gigas
''Tridacna gigas'', the giant clam, is the best-known species of the giant clam genus ''Tridacna''. Giant clams are the largest living bivalve molluscs. Several other species of "giant clam" in the genus ''Tridacna'' are often misidentified as ''Tridacna gigas''. These clams were known to indigenous peoples of East Asia for thousands of years and the Venetian scholar and explorer Antonio Pigafetta documented them in a journal as early as 1521. One of a number of large clam species native to the shallow coral reefs of the South Pacific and Indian oceans, they may weigh more than , measure as much as across, and have an average lifespan in the wild of more than 100 years. They also are found off the shores of the Philippines and in the South China Sea in the coral reefs of Malaysia. The giant clam lives in flat coral sand or broken coral and may be found at depths of as great as 20 m (66 ft). Its range covers the Indo-Pacific, but populations are diminishing quickly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tridacna
''Tridacna'' is a genus of large saltwater clams, Marine (ocean), marine bivalve molluscs in the subfamily Tridacninae, the giant clams. Many Tridacna species are threatened. They have heavy shells, fluted with 4 to 6 folds. The Mantle (mollusc), mantle is often brightly coloured. They inhabit shallow waters of coral reefs in warm seas of the Indo-Pacific region.Huelsken, T., Keyse, J., Liggins, L., Penny, S., Treml, E.A., Riginos, C. (2013) A Novel Widespread Cryptic Species and Phylogeographic Patterns within Several Giant Clam Species (Cardiidae: Tridacna) from the Indo-Pacific Ocean. PLoS ONEDOI: 10.1371/journal.pone.0080858 These clams are popular in marine aquarium, marine aquaria, and in some areas, such as the Philippines, members of the genus are farmed for the marine aquarium trade. They live in symbiosis with photosynthetic algae (zooxanthellae). Some species are eaten by humans. All species in the genus ''Tridacna'' are protected under CITES Appendix II. Etymology ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Giant Clam
''Tridacna gigas'', the giant clam, is the best-known species of the giant clam genus ''Tridacna''. Giant clams are the largest living bivalve molluscs. Several other species of "giant clam" in the genus ''Tridacna'' are often misidentified as ''Tridacna gigas''. These clams were known to indigenous peoples of East Asia for thousands of years and the Venetian scholar and explorer Antonio Pigafetta documented them in a journal as early as 1521. One of a number of large clam species native to the shallow coral reefs of the South Pacific and Indian oceans, they may weigh more than , measure as much as across, and have an average lifespan in the wild of more than 100 years. They also are found off the shores of the Philippines and in the South China Sea in the coral reefs of Malaysia. The giant clam lives in flat coral sand or broken coral and may be found at depths of as great as 20 m (66 ft). Its range covers the Indo-Pacific, but populations are diminishing quickly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tridacna Squamosa
''Tridacna squamosa'', known commonly as the fluted giant clam and scaly clam, is a species of bivalve in the family Cardiidae.MolluscaBase eds. (2022). MolluscaBase. Tridacna squamosa Lamarck, 1819. Accessed through: World Register of Marine Species at: https://marinespecies.org/aphia.php?p=taxdetails&id=207674 on 2022-10-13 It is one of a number of large clam species native to the shallow coral reefs of the South Pacific and Indian Oceans. It is distinguished by the large, leaf-like fluted edges on its shell called 'scutes' and a byssal opening that is small compared to those of other members of the subfamily Tridacninae. Normal coloration of the mantle ranges from browns and purples to greens and yellows arranged in elongated linear or spot-like patterns. ''Tridacna squamosa'' grows to across. Sessile in adulthood, the clam's mantle tissues act as a habitat for the symbiotic single-celled dinoflagellate algae (zooxanthellae) from which it gets a major portion of its nutri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photosymbiosis
Photosymbiosis is a type of symbiosis where one of the organisms is capable of photosynthesis. Examples of photosymbiotic relationships include those in lichens, plankton, ciliates, and many marine organisms including corals, fire corals, giant clams, and jellyfish. Photosymbiosis is important in the development, maintenance, and evolution of terrestrial and aquatic ecosystems, for example in biological soil crusts, soil formation, supporting highly diverse microbial populations in soil and water, and coral reef growth and maintenance. When one organism lives within another symbiotically it's called endosymbiosis. Photosymbiotic relationships where microalgae and/or cyanobacteria live within a heterotrophic host organism, are believed to have led to eukaryotes acquiring photosynthesis and to the evolution of plants. Occurrence Lichens Lichens represent an association between one or more fungal mycobionts and one or more photosynthetic algal or cyanobacterial photobio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cardiidae
A cockle is an edible marine bivalve mollusc. Although many small edible bivalves are loosely called cockles, true cockles are species in the family Cardiidae.>MolluscaBase eds. (2022). MolluscaBase. Cardiidae Lamarck, 1809. Accessed through: World Register of Marine Species on 2022-02-09/ref> True cockles live in sandy, sheltered beaches throughout the world. The distinctive rounded shells are bilaterally symmetrical, and are heart-shaped when viewed from the end. Numerous radial, evenly spaced ribs are a feature of the shell in most but not all genera (for an exception, see the genus '' Laevicardium'', the egg cockles, which have very smooth shells). The shell of a cockle is able to close completely (i.e., there is no "gap" at any point around the edge). Though the shell of a cockle may superficially resemble that of a scallop because of the ribs, cockles can be distinguished from scallops morphologically in that cockle shells lack "auricles" (triangular ear-shaped protrusio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monophyletic
In biological cladistics for the classification of organisms, monophyly is the condition of a taxonomic grouping being a clade – that is, a grouping of organisms which meets these criteria: # the grouping contains its own most recent common ancestor (or more precisely an ancestral population), i.e. excludes non-descendants of that common ancestor # the grouping contains all the descendants of that common ancestor, without exception Monophyly is contrasted with paraphyly and polyphyly as shown in the second diagram. A ''paraphyletic'' grouping meets 1. but not 2., thus consisting of the descendants of a common ancestor, excepting one or more monophyletic subgroups. A '' polyphyletic'' grouping meets neither criterion, and instead serves to characterize convergent relationships of biological features rather than genetic relationships – for example, night-active primates, fruit trees, or aquatic insects. As such, these characteristic features of a polyphyletic grouping ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sister Taxa
In phylogenetics, a sister group or sister taxon, also called an adelphotaxon, comprises the closest relative(s) of another given unit in an evolutionary tree. Definition The expression is most easily illustrated by a cladogram: Taxon A and taxon B are sister groups to each other. Taxa A and B, together with any other extant or extinct descendants of their most recent common ancestor (MRCA), form a monophyletic group, the clade AB. Clade AB and taxon C are also sister groups. Taxa A, B, and C, together with all other descendants of their MRCA form the clade ABC. The whole clade ABC is itself a subtree of a larger tree which offers yet more sister group relationships, both among the leaves and among larger, more deeply rooted clades. The tree structure shown connects through its root to the rest of the universal tree of life. In cladistic standards, taxa A, B, and C may represent specimens, species, genera, or any other taxonomic units. If A and B are at the same taxonomic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vanuatu
Vanuatu ( or ; ), officially the Republic of Vanuatu (; ), is an island country in Melanesia located in the South Pacific Ocean. The archipelago, which is of volcanic origin, is east of northern Australia, northeast of New Caledonia, east of New Guinea, southeast of Solomon Islands, and west of Fiji. Vanuatu was first inhabited by Melanesians, Melanesian people. The first Europeans to visit the islands were a Spanish expedition led by Portuguese navigator Pedro Fernandes de Queirós, Fernandes de Queirós, who arrived on the largest island, Espíritu Santo, in 1606. Queirós claimed the archipelago for Spain, as part of the colonial Spanish East Indies and named it . In the 1880s, France and the United Kingdom of Great Britain and Ireland, United Kingdom claimed parts of the archipelago, and in 1906, they agreed on a framework for jointly managing the archipelago as the New Hebrides through an Anglo-French condominium (international law), condominium. An independence movem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eocene
The Eocene ( ) is a geological epoch (geology), epoch that lasted from about 56 to 33.9 million years ago (Ma). It is the second epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name ''Eocene'' comes from the Ancient Greek (''Ēṓs'', 'Eos, Dawn') and (''kainós'', "new") and refers to the "dawn" of modern ('new') fauna that appeared during the epoch.See: *Letter from William Whewell to Charles Lyell dated 31 January 1831 in: * From p. 55: "The period next antecedent we shall call Eocene, from ήως, aurora, and χαινος, recens, because the extremely small proportion of living species contained in these strata, indicates what may be considered the first commencement, or ''dawn'', of the existing state of the animate creation." The Eocene spans the time from the end of the Paleocene Epoch to the beginning of the Oligocene Epoch. The start of the Eocene is marked by a brief period in which the concentration of the carbon isoto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
