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Stefania Percristata
''Stefania percristata'' ( es, rana stefania de Jaua) is a species of frog in the family Hemiphractidae. It is endemic to Venezuela and only known from its type locality, Cerro Jaua in Bolívar State. It occurs along streams at the top of the tepui. It is a nocturnal species found on branches of vegetation above the ground. Conservation status The tepui is within the Jaua-Sarisariñama National Park Jaua-Sarisariñama National Park (Spanish: ''Parque nacional Jaua-Sarisariñama'') was located in the Guayana Highlands, within Bolívar State of southeastern Venezuela.BirdLife International (2015Important Bird and Biodiversity Area factsheet: ..., and no major threats to this species have been identified. References percristata Amphibians of Venezuela Endemic fauna of Venezuela Taxonomy articles created by Polbot Amphibians described in 1997 Amphibians of the Tepuis {{Hemiphractidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frog
A frog is any member of a diverse and largely Carnivore, carnivorous group of short-bodied, tailless amphibians composing the order (biology), order Anura (ανοὐρά, literally ''without tail'' in Ancient Greek). The oldest fossil "proto-frog" ''Triadobatrachus'' is known from the Early Triassic of Madagascar, but molecular clock, molecular clock dating suggests their split from other amphibians may extend further back to the Permian, 265 Myr, million years ago. Frogs are widely distributed, ranging from the tropics to subarctic regions, but the greatest concentration of species diversity is in tropical rainforest. Frogs account for around 88% of extant amphibian species. They are also one of the five most diverse vertebrate orders. Warty frog species tend to be called toads, but the distinction between frogs and toads is informal, not from Taxonomy (biology), taxonomy or evolutionary history. An adult frog has a stout body, protruding eyes, anteriorly-attached tongue, limb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hemiphractidae
The Hemiphractidae are a family (biology), family of frogs from South America, South and Central America. Previously, this group had been classified as a subfamily (Hemiphractinae) under family Hylidae. More recent research classifies these genera into their own family, or sometimes into three separate families: Amphignathodontidae (''Flectonotus'' and ''Gastrotheca''), Cryptobatrachidae (''Cryptobatrachus'' and ''Stefania''), and Hemiphractidae (''Hemiphractus''). An active question still exists as to which of these groupings is more accurate. Breeding behavior An unusual and unique adaptation in this family is the breeding behavior where the eggs are carried on the female's back; the eggs may develop into froglets on the back of the female without free-swimming tadpole stage, be released after hatching as tadpoles, or be deposited in water to complete their development there. In some species (genus ''Gastrotheca'' and some ''Flectonotus''), this goes as far as to enclose th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic
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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Venezuela
Venezuela (; ), officially the Bolivarian Republic of Venezuela ( es, link=no, República Bolivariana de Venezuela), is a country on the northern coast of South America, consisting of a continental landmass and many islands and islets in the Caribbean Sea. It has a territorial extension of , and its population was estimated at 29 million in 2022. The capital and largest urban agglomeration is the city of Caracas. The continental territory is bordered on the north by the Caribbean Sea and the Atlantic Ocean, on the west by Colombia, Brazil on the south, Trinidad and Tobago to the north-east and on the east by Guyana. The Venezuelan government maintains a claim against Guyana to Guayana Esequiba. Venezuela is a federal presidential republic consisting of 23 states, the Capital District and federal dependencies covering Venezuela's offshore islands. Venezuela is among the most urbanized countries in Latin America; the vast majority of Venezuelans live in the cities of the n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type Locality (biology)
In biology, a type is a particular specimen (or in some cases a group of specimens) of an organism to which the scientific name of that organism is formally attached. In other words, a type is an example that serves to anchor or centralizes the defining features of that particular taxon. In older usage (pre-1900 in botany), a type was a taxon rather than a specimen. A taxon is a scientifically named grouping of organisms with other like organisms, a set that includes some organisms and excludes others, based on a detailed published description (for example a species description) and on the provision of type material, which is usually available to scientists for examination in a major museum research collection, or similar institution. Type specimen According to a precise set of rules laid down in the International Code of Zoological Nomenclature (ICZN) and the International Code of Nomenclature for algae, fungi, and plants (ICN), the scientific name of every taxon is almost a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerro Jaua
Cerro Jaua is a tepui in Bolivar State, Venezuela. The mountain has a height of 2395 meters, It was included in Jaua-Sarisariñama National Park which has been subsumed within Caura National Park. Wildlife Cerro Jaua, like some other tepuis, has endemic frog species. These include '' Anomaloglossus ayarzaguenai'' (La Marca 1996), ''Stefania oculosa'' (Señaris, Ayarzagüena, and Gorzula, 1997) and ''Stefania percristata ''Stefania percristata'' ( es, rana stefania de Jaua) is a species of frog in the family Hemiphractidae. It is endemic to Venezuela and only known from its type locality, Cerro Jaua in Bolívar State. It occurs along streams at the top of the t ...'' (Señaris, Ayarzagüena, and Gorzula, 1997). References Mountains of Bolívar (state) Tepuis of Venezuela {{venezuela-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bolívar (state)
Bolívar ( es, Estado Bolívar, ) is one of the 23 states of Venezuela. The state capital city is Ciudad Bolívar, but the largest city is Ciudad Guayana. Bolívar State covers a total surface area of and as of the 2011 census, had a population of 1,410,964. The state contains Angel Falls. History Spanish Colonization During the time of the Spanish Empire, it was part of the province of Nueva Andalucía and later it was annexed to the province of Guayana from 1777 when King Charles III created the Captaincy General of Venezuela. The capital of the state, Ciudad Bolivar was founded on December 21, 1595 by Antonio de Berrío, who had come from Nueva Granada (present-day Colombia) with the mission of populating Guyana. The town, originally called Santo Tomás de Guayana, was a fortified port that had to move three times, since it was the target of constant assaults by Caribbean Indians and European corsairs, among whom Sir Walter Raleigh stood out in 1617. In 1764 it foun ... [...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] |
Nocturnal
Nocturnality is an animal behavior characterized by being active during the night and sleeping during the day. The common adjective is "nocturnal", versus diurnal meaning the opposite. Nocturnal creatures generally have highly developed senses of hearing, smell, and specially adapted eyesight. Some animals, such as cats and ferrets, have eyes that can adapt to both low-level and bright day levels of illumination (see metaturnal). Others, such as bushbabies and (some) bats, can function only at night. Many nocturnal creatures including tarsiers and some owls have large eyes in comparison with their body size to compensate for the lower light levels at night. More specifically, they have been found to have a larger cornea relative to their eye size than diurnal creatures to increase their : in the low-light conditions. Nocturnality helps wasps, such as ''Apoica flavissima'', avoid hunting in intense sunlight. Diurnal animals, including squirrels and songbirds, are active du ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jaua-Sarisariñama National Park
Jaua-Sarisariñama National Park (Spanish: ''Parque nacional Jaua-Sarisariñama'') was located in the Guayana Highlands, within Bolívar State of southeastern Venezuela.BirdLife International (2015Important Bird and Biodiversity Area factsheet: Parque Nacional Jaua-SarisariñamaDownloaded on 11/11/2015 It was established in 1978. It has been subsumed within Caura National Park, which was established in 2017. The landscape of the park is notable for three sandstone tepuis, Jaua, Sarisariñama and Guanacoco. The top of Sarisariñama is forested and has sinkholes. Ecology The park is an Important Bird Area. Resident bird species include Tepui parrotlet (''Nannopsittaca panychlora''). Amphibians of interest include three species of ''stefania'' (carrying frogs) which appear to be endemic to the park: * ''Stefania oculosa'' (Spanish: ''Rana Stefania De Ojos Grandes'') * ''Stefania percristata'' * ''Stefania riae ''Stefania riae'' (common name: Sarisarinama carrying frog, es ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stefania
''Stefania'' is a genus of frogs in the family Hemiphractidae. They are native to the highlands of the Guiana Shield in southern Venezuela, Guyana, and adjacent far northern Brazil. Most are restricted to the tepui highlands, but '' S. evansi'' also occurs in lowlands. On most mountains there are only 1–2 species from this genus, but five are known from Mount Ayanganna and the neighbouring Mount Wokomung has six species. They are usually found near streams at low levels on branches/leaves or on the ground among vegetation/rocks. They are famous for their breeding strategy where the development from eggs to froglets is completed on the back of the female (the eggs hatch to froglets; there is no free-swimming tadpole A tadpole is the larval stage in the biological life cycle of an amphibian. Most tadpoles are fully aquatic, though some species of amphibians have tadpoles that are terrestrial. Tadpoles have some fish-like features that may not be found i ... stage). The c ... [...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] |
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