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Ceuthomantis Aracamuni
''Ceuthomantis aracamuni'', also known as the Cerro Aracamuni emerald-barred frog, is a species of frog in the family Ceuthomantidae. It is endemic to Cerro Aracamuni in southern Amazonas, Venezuela. Description The type series consists of two individuals. The holotype is a subadult male measuring in snout–vent length. The paratype is a juvenile measuring in snout–vent length. The head is wider than the body. The snout is subovoid in dorsal view and truncate in profile. The tympanum is distinct. The finger tips have broad discs. The toe discs are smaller than the finger ones. No lateral keels nor webbing are present. The dorsum is yellowish green with brown spots. The limbs are dorsally reddish brown with green. There is a brick red canthal stripe and an ochre supratympanic stripe. The belly is blackish brown with white spots. Distribution and habitat ''Ceuthomantis aracamuni'' is only known from the type series collected from Cerro Aracamuni at above sea level. It is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerro Aracamuni
Cerro Aracamuni is a granitic tepui in Amazonas state, Venezuela.Huber, O. (1995). Geographical and physical features. In: P.E. Berry, B.K. Holst & K. Yatskievych (eds.) '' Flora of the Venezuelan Guayana. Volume 1. Introduction.'' Missouri Botanical Garden Press, St. Louis. pp. 1–61. Part of the Neblina–Aracamuni Massif, it lies north of Cerro Avispa and the vast complex of Cerro de la Neblina. Cerro Aracamuni and Cerro Avispa share a common slope area; they have a combined summit area of and an estimated combined slope area of . Both of these cerro-plateaus have a maximum elevation of around . Cerro Aracamuni lies within the Serranía de la Neblina National Park. There is illegal mining activity at its base. Cerro Aracamuni emerald-barred frog, ''Ceuthomantis aracamuni ''Ceuthomantis aracamuni'', also known as the Cerro Aracamuni emerald-barred frog, is a species of frog in the family Ceuthomantidae. It is endemic to Cerro Aracamuni in southern Amazonas, Venezue ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerro Avispa
Cerro Avispa is a tepui in Amazonas state, Venezuela.Huber, O. (1995). Geographical and physical features. In: P.E. Berry, B.K. Holst & K. Yatskievych (eds.) '' Flora of the Venezuelan Guayana. Volume 1. Introduction.'' Missouri Botanical Garden Press, St. Louis. pp. 1–61. Part of the Neblina–Aracamuni Massif, it lies south of Cerro Aracamuni (with which it shares a common slope area) and north of Cerro de la Neblina Cerro de la Neblina (lit. "Mountain of the Mist"), also known as Serra da Neblina in Brazil and Sierra de la Neblina in Venezuela, is a sandstone massif located in the northern Amazon Basin. It is a tilted, heavily eroded plateau, with a deep can .... Cerro Avispa and Cerro Aracamuni have a combined summit area of and an estimated combined slope area of . Both of these cerro-plateaus have a maximum elevation of around . See also * Distribution of ''Heliamphora'' References Tepuis of Venezuela Mountains of Venezuela Geography of Amazonas (Venezu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphibians Of The Tepuis
Amphibians are four-limbed and ectothermic vertebrates of the class Amphibia. All living amphibians belong to the group Lissamphibia. They inhabit a wide variety of habitats, with most species living within terrestrial, fossorial, arboreal or freshwater aquatic ecosystems. Thus amphibians typically start out as larvae living in water, but some species have developed behavioural adaptations to bypass this. The young generally undergo metamorphosis from larva with gills to an adult air-breathing form with lungs. Amphibians use their skin as a secondary respiratory surface and some small terrestrial salamanders and frogs lack lungs and rely entirely on their skin. They are superficially similar to reptiles like lizards but, along with mammals and birds, reptiles are amniotes and do not require water bodies in which to breed. With their complex reproductive needs and permeable skins, amphibians are often ecological indicators; in recent decades there has been a dramatic decline ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphibians Of Venezuela
Amphibians are four-limbed and ectothermic vertebrates of the class Amphibia. All living amphibians belong to the group Lissamphibia. They inhabit a wide variety of habitats, with most species living within terrestrial, fossorial, arboreal or freshwater aquatic ecosystems. Thus amphibians typically start out as larvae living in water, but some species have developed behavioural adaptations to bypass this. The young generally undergo metamorphosis from larva with gills to an adult air-breathing form with lungs. Amphibians use their skin as a secondary respiratory surface and some small terrestrial salamanders and frogs lack lungs and rely entirely on their skin. They are superficially similar to reptiles like lizards but, along with mammals and birds, reptiles are amniotes and do not require water bodies in which to breed. With their complex reproductive needs and permeable skins, amphibians are often ecological indicators; in recent decades there has been a dramatic decline ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic Fauna Of Venezuela
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can be also be referred to as an ''endemism'' or in scientific literature as an ''endemite''. For example '' Cytisus aeolicus'' is an endemite of the Italian flora. '' Adzharia renschi'' was once believed to be an endemite of the Caucasus, but it was later discovered to be a non-indigenous species from South America belonging to a different genus. The extreme opposite of an endemic species is one with a cosmopolitan distribution, having a global or widespread range. A rare alternative term for a species that is endemic is "precinctive", which applies to s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceuthomantis
''Ceuthomantis'' is a small genus of craugastorid frogs, also treated as comprising their own monogeneric family Ceuthomantidae. They are found in the southern and eastern parts of the Guiana Highlands in Venezuela, Guyana, and Brazil. The generic name is derived from the Greek noun ''mantis'', which means treefrog, and adjective ''keuthos'', which means hidden, in allusion to the hidden existence of this genus in the tepuis of the Guiana Shield. Taxonomy ''Ceuthomantis'' was first described as the only genus in its own family Ceuthomantidae, but is now merged with Pristimantinae; the oldest name for this taxon is Ceuthomantinae. The AmphibiaWeb maintains Ceuthomantidae as a monogeneric family. ''Ceuthomantis'' is closely related to '' Dischidodactylus'', with which they share a synapomorphy: completely or almost completely divided ungual flaps. Both genera also have dorsal skin composed of small, flat, pliable (not keratinized) warts, and lack nuptial pads in adult males. They d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Serranía De La Neblina National Park
The Serranía de la Neblina National Park is a national park of Venezuela. Location It is located in the State of Amazonas, southwest of the Parima Tapirapecó National Park. It covers the area of the Cerro de la Neblina, whose highest peak on the Venezuelan side is Pico 31 de Março, Phelps Peak at 2,992 meters above sea level. The massif extends towards Brazilian territory, where the highest point, Pico da Neblina (3,014m). On the Brazilian side there is also a national park, Pico da Neblina National Park, to preserve this ecosystem. Physical This mountainous massif is continuously covered with clouds, giving rise to its name "La Neblina" ("the mist"). Located in the middle of the Amazon, it is the highest elevation of the region. La Serrania La Neblina is the highest tepuy, and is cut in two by the Baría Grande Canyon, one of the deepest canyons in the world. The park, along with, the Parima Tapirapecó park, forms part of the Orinoco-Casiquiare biosphere reserve. Environme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tannic
Tannins (or tannoids) are a class of astringent, polyphenolic biomolecules that bind to and precipitate proteins and various other organic compounds including amino acids and alkaloids. The term ''tannin'' (from Anglo-Norman ''tanner'', from Medieval Latin ''tannāre'', from ''tannum'', oak bark) refers to the use of oak and other bark in tanning animal hides into leather. By extension, the term ''tannin'' is widely applied to any large polyphenolic compound containing sufficient hydroxyls and other suitable groups (such as carboxyls) to form strong complexes with various macromolecules. The tannin compounds are widely distributed in many species of plants, where they play a role in protection from predation (acting as pesticides) and might help in regulating plant growth. The astringency from the tannins is what causes the dry and puckery feeling in the mouth following the consumption of unripened fruit, red wine or tea. Likewise, the destruction or modific ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scree
Scree is a collection of broken rock fragments at the base of a cliff or other steep rocky mass that has accumulated through periodic rockfall. Landforms associated with these materials are often called talus deposits. Talus deposits typically have a concave upwards form, where the maximum inclination corresponds to the angle of repose of the mean debris particle size. The exact definition of scree in the primary literature is somewhat relaxed, and it often overlaps with both ''talus'' and ''colluvium''. The term ''scree'' comes from the Old Norse term for landslide, ''skriða'', while the term ''talus'' is a French word meaning a slope or embankment. In high-altitude arctic and subarctic regions, scree slopes and talus deposits are typically adjacent to hills and river valleys. These steep slopes usually originate from late-Pleistocene periglacial processes. Notable scree sites in Eastern North America include the Ice Caves at White Rocks National Recreation Area in southern Ve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tepui
A tepui , or tepuy (), is a table-top mountain or mesa found in South America, especially in Venezuela and western Guyana. The word tepui means "house of the gods" in the native tongue of the Pemon, the indigenous people who inhabit the Gran Sabana. Tepuis tend to be found as isolated entities rather than in connected ranges, which makes them the host of a unique array of endemic plant and animal species. Some of the most outstanding tepuis are Auyantepui, Autana, Neblina, and Mount Roraima. They are typically composed of sheer blocks of Precambrian quartz arenite sandstone that rise abruptly from the jungle, giving rise to spectacular natural scenery. Auyantepui is the source of Angel Falls, the world's tallest waterfall. Morphology These table-top mountains are the remains of a large sandstone plateau that once covered the granite basement complex between the north border of the Amazon Basin and the Orinoco, between the Atlantic coast and the Rio Negro. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sandstone
Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates) because they are the most resistant minerals to weathering processes at the Earth's surface. Like uncemented sand, sandstone may be any color due to impurities within the minerals, but the most common colors are tan, brown, yellow, red, grey, pink, white, and black. Since sandstone beds often form highly visible cliffs and other topographic features, certain colors of sandstone have been strongly identified with certain regions. Rock formations that are primarily composed of sandstone usually allow the percolation of water and other fluids and are porous enough to store large quantities, making them valuable aquifers and petroleum reservoirs. Quartz-bearing sandstone can be changed into quartzite through metamorphism, usually related to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Granitic
A granitoid is a generic term for a diverse category of coarse-grained igneous rocks that consist predominantly of quartz, plagioclase, and alkali feldspar. Granitoids range from plagioclase-rich tonalites to alkali-rich syenites and from quartz-poor monzonites to quartz-rich quartzolites. As only two of the three defining mineral groups (quartz, plagioclase, and alkali feldspar) need to be present for the rock to be called a granitoid, foid-bearing rocks, which predominantly contain feldspars but no quartz, are also granitoids. The terms ''granite'' and ''granitic rock'' are often used interchangeably for granitoids; however, granite is just one particular type of granitoid. Granitoids are diverse; no classification system for granitoids can give a complete and unique characterization of the origin, compositional evolution, and geodynamic environment for the genesis of a granitoid. Accordingly, multiple granitoid classification systems have been developed such as those based ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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