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Karstarma Waigeo
''Karstarma'' is a genus of karst-dwelling crabs formerly included in '' Sesarmoides''. Description ''Karstarma'' is distinguished from the closely related '' Sesarmoides'' by the lack of a stridulatory structure on the cheliped which is present in the latter genus. Ecology & biogeography All species in the genus ''Karstarma'' are typically found in anchialine pools across the Indo-Pacific. Taxonomy The genus name ''Karstarma'' is derived from the word ''karst'', in arbitrary combination with the genus name '' Sesarma''. It has been frequently misspelt ''Karstama'', including in the original description. In the original description of the genus, 12 species were included. Three species have since been added. A new species, ''K. vulcan'', was also described from Réunion in 2018; this species is unique from all others as it is found in the western Indian Ocean rather than the eastern Indian or Pacific Oceans. *''Karstarma ardea'' Wowor & Ng, 2009 *''Karstarma balicum'' (Ng, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karstarma Ultrapes
''Karstarma'' is a genus of karst-dwelling crabs formerly included in '' Sesarmoides''. Description ''Karstarma'' is distinguished from the closely related '' Sesarmoides'' by the lack of a stridulatory structure on the cheliped which is present in the latter genus. Ecology & biogeography All species in the genus ''Karstarma'' are typically found in anchialine pools across the Indo-Pacific. Taxonomy The genus name ''Karstarma'' is derived from the word ''karst'', in arbitrary combination with the genus name '' Sesarma''. It has been frequently misspelt ''Karstama'', including in the original description. In the original description of the genus, 12 species were included. Three species have since been added. A new species, ''K. vulcan'', was also described from 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 lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crab
Crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting "tail" (abdomen) ( el, βραχύς , translit=brachys = short, / = tail), usually hidden entirely under the thorax. They live in all the world's oceans, in freshwater, and on land, are generally covered with a thick exoskeleton, and have a single pair of pincers. They first appeared during the Jurassic Period. Description Crabs are generally covered with a thick exoskeleton, composed primarily of highly mineralized chitin, and armed with a pair of chelae (claws). Crabs vary in size from the pea crab, a few millimeters wide, to the Japanese spider crab, with a leg span up to . Several other groups of crustaceans with similar appearances – such as king crabs and porcelain crabs – are not true crabs, but have evolved features similar to true crabs through a process known as carcinisation. Environment Crabs are found in all of the world's oceans, as well as in fresh w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karstarma Vulcan
''Karstarma'' is a genus of karst-dwelling crabs formerly included in '' Sesarmoides''. Description ''Karstarma'' is distinguished from the closely related '' Sesarmoides'' by the lack of a stridulatory structure on the cheliped which is present in the latter genus. Ecology & biogeography All species in the genus ''Karstarma'' are typically found in anchialine pools across the Indo-Pacific. Taxonomy The genus name ''Karstarma'' is derived from the word ''karst'', in arbitrary combination with the genus name '' Sesarma''. It has been frequently misspelt ''Karstama'', including in the original description. In the original description of the genus, 12 species were included. Three species have since been added. A new species, ''K. vulcan'', was also described from 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 lo ... [...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 break ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sesarma
''Sesarma'' is a genus of terrestrial crabs endemic to the Americas. Many species within this genus live in mangroves. They have evolved to be fully terrestrial, which means they do not have to return to the sea even to spawn. Several species initially placed here are now placed in other genera of the Sesarmidae, and in some cases even elsewhere in the Grapsoidea. ''Sesarma'' contains the following extant species: *'' Sesarma abeokuta'' Schubart & Santl, 2014 *'' Sesarma aequatoriale'' Ortmann, 1894 *'' Sesarma ayatum'' Reimer & Diesel, 1998 *'' Sesarma bidentatum'' Benedict, 1892 *'' Sesarma cookei'' Hartnoll, 1971 *''Sesarma crassipes'' Cano, 1889 *'' Sesarma curacaoense'' De Man, 1892 *'' Sesarma dolphinum'' Schubart & Diesel, 1998 *'' Sesarma fossarum'' Reimer, Diesel & Türkay, 1997 *''Sesarma jarvisi'' Rathbun, 1913 *''Sesarma meridies'' Schubart & Koller, 2005 *''Sesarma rectum'' Randall, 1840 *''Sesarma reticulatum'' (Say, 1817) *''Sesarma rhizophorae'' Rathbun, 1906 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indo-Pacific
The Indo-Pacific is a vast biogeographic region of Earth. In a narrow sense, sometimes known as the Indo-West Pacific or Indo-Pacific Asia, it comprises the tropical waters of the Indian Ocean, the western and central Pacific Ocean, and the seas connecting the two in the general area of Indonesia. It does not include the temperate and polar regions of the Indian and Pacific oceans, nor the Tropical Eastern Pacific, along the Pacific coast of the Americas, which is also a distinct marine realm. The term is especially useful in marine biology, ichthyology, and similar fields, since many marine habitats are continuously connected from Madagascar to Japan and Oceania, and a number of species occur over that range, but are not found in the Atlantic Ocean. The region has an exceptionally high species richness, with the world's highest species richness being found in at its heart in the Coral Triangle, and a remarkable gradient of decreasing species richness radiating outward in al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anchialine Pool
An anchialine system (, from Greek ''ankhialos'', "near the sea") is a landlocked body of water with a subterranean connection to the ocean. Depending on its formation, these systems can exist in one of two primary forms: pools or caves. The primary differentiating characteristics between pools and caves is the availability of light; cave systems are generally aphotic while pools are euphotic. The difference in light availability has a large influence on the biology of a given system. Anchialine systems are a feature of coastal aquifers which are density stratified, with water near the surface being fresh or brackish, and saline water intruding from the coast at depth. Depending on the site, it is sometimes possible to access the deeper saline water directly in the anchialine pool, or sometimes it may be accessible by cave diving. Anchialine systems are extremely common worldwide especially along neotropical coastlines where the geology and aquifer systems are relatively young, and t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cheliped
A chela ()also called a claw, nipper, or pinceris a pincer-like organ at the end of certain limbs of some arthropods. The name comes from Ancient Greek , through New Latin '. The plural form is chelae. Legs bearing a chela are called chelipeds. Another name is ''claw'' because most chelae are curved and have a sharp point like a claw. Chelae can be present at the tips of arthropod legs as well as their pedipalps. Chelae are distinct from spider chelicerae in that they do not contain venomous glands and cannot distribute venom. See also * Pincer (biology) * Pincer (tool) Pincers are a hand tool used in many situations where a mechanical advantage is required to pinch, cut or pull an object. Pincers are first-class levers, but differ from pliers in that the concentration of force is either to a point, or to an ... References Arthropod anatomy {{Arthropod-anatomy-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stridulation
Stridulation is the act of producing sound by rubbing together certain body parts. This behavior is mostly associated with insects, but other animals are known to do this as well, such as a number of species of fish, snakes and spiders. The mechanism is typically that of one structure with a well-defined lip, ridge, or nodules (the "scraper" or ''plectrum'') being moved across a finely-ridged surface (the "file" or ''stridulitrum''—sometimes called the ''pars stridens'') or vice versa, and vibrating as it does so, like the dragging of a phonograph needle across a vinyl record. Sometimes it is the structure bearing the file which resonates to produce the sound, but in other cases it is the structure bearing the scraper, with both variants possible in related groups. Common onomatopoeic words for the sounds produced by stridulation include ''chirp'' and ''chirrup''. Arthropod stridulation Insects and other arthropods stridulate by rubbing together two parts of the body. These a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karst
Karst is a topography formed from the dissolution of soluble rocks such as limestone, dolomite, and gypsum. It is characterized by underground drainage systems with sinkholes and caves. It has also been documented for more weathering-resistant rocks, such as quartzite, given the right conditions. Subterranean drainage may limit surface water, with few to no rivers or lakes. However, in regions where the dissolved bedrock is covered (perhaps by debris) or confined by one or more superimposed non-soluble rock strata, distinctive karst features may occur only at subsurface levels and can be totally missing above ground. The study of ''paleokarst'' (buried karst in the stratigraphic column) is important in petroleum geology because as much as 50% of the world's hydrocarbon reserves are hosted in carbonate rock, and much of this is found in porous karst systems. Etymology The English word ''karst'' was borrowed from German in the late 19th century, which entered German much earlier ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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