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Nanorana Bourreti
''Nanorana yunnanensis'', commonly known as Yunnan paa frog, Yunnan spiny frog, Bourret's paa frog or Bourret's frog, is a species of frog in the family Dicroglossidae. It is found in southwestern China, Vietnam, Myanmar, northern Thailand, and likely in the intervening Laos. Its natural habitats are small and large streams in montane forests, scrub vegetation and grasslands, and it has also been found in ditches. It is threatened primarily by collection for human consumption, but also by habitat loss caused by agricultural development and infrastructure development. ''Nanorana yunnanensis'' are relatively large frogs: males grow to a snout–vent length Snout–vent length (SVL) is a morphometric measurement taken in herpetology from the tip of the snout to the most posterior opening of the cloacal slit (vent)."direct line distance from tip of snout to posterior margin of vent" It is the most c ... of about and females to . Tadpoles are up to in length. References ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Anderson (zoologist)
John Anderson (4 October 1833 – 15 August 1900) was a Scottish anatomist and zoologist who worked in India as the curator of the Indian Museum, Calcutta. Early life Anderson was born in Edinburgh, the second son of Thomas Anderson, who worked in the National Bank of Scotland, and his wife Jane Cleghorn. He took an interest in natural history at an early age as did his brother Thomas Anderson, who worked at the Royal Botanic Garden in Calcutta from 1861 to 1863. He went to school at George Square Academy and Hill Street Institution before joining work at the Bank of Scotland. He left the bank to study medicine, and graduated from the University of Edinburgh in 1861. He studied anatomy under John Goodsir and received his MD in 1862 with a gold medal for his thesis in zoology. He was also associated with the founding of the Royal Physical Society which grew out of the Wernerian Society over which he presided. He was appointed to the chair of natural history in the Free C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 in adult amphibians such as a lateral line, gills and swimming tails. As they undergo metamorphosis, they start to develop functional lungs for breathing air, and the diet of tadpoles changes drastically. A few amphibians, such as some members of the frog family Brevicipitidae, undergo direct development i.e., they do not undergo a free-living larval stage as tadpoles instead emerging from eggs as fully formed "froglet" miniatures of the adult morphology. Some other species hatch into tadpoles underneath the skin of the female adult or are kept in a pouch until after metamorphosis. Having no hard skeletons, it might be expected that tadpole fossils would not exist. However, traces of biofilms have been preserved and fossil tadpoles have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphibians Described In 1879
Amphibians are tetrapod, four-limbed and ectothermic vertebrates of the Class (biology), class Amphibia. All living amphibians belong to the group Lissamphibia. They inhabit a wide variety of habitats, with most species living within terrestrial animal, 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 re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphibians Of Vietnam
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 Thailand
The following is a list of amphibians of Thailand. There are more than 160 species recorded. Species list The following table is a checklist of amphibians of Thailand, with geographic ranges, citations, and Thai names included. Common species Amphibian species commonly found in anthropogenically modified environments include:Hartmann, Timo, et al. (2013)A Preliminary Annotated Checklist of the Amphibians and Reptiles of the Kulen Promtep Wildlife Sanctuary in Northern Cambodia Asian Herpetological Research 2013, 4(1): 36–55. DOI: 10.3724/SP.J.1245.2013.00036 Family Bufonidae (True toads) *''Duttaphrynus melanostictus'' Family Microhylidae (Narrow-mouthed frogs) *''Kaloula pulchra'' *''Microhyla butleri'' *''Microhyla fissipes'' (formerly classified as '' Microhyla ornata'') *''Microhyla heymonsi'' *'' Microhyla pulchra'' Family Dicroglossidae (Fork-tongued frogs) *''Fejervarya limnocharis'' *'' Hoplobatrachus rugulosus'' *'' Occidozyga lima'' *'' Occidozyga martensii'' Fami ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphibians Of Myanmar
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] |
Frogs Of China
China's vast and diverse landscape is home to a profound variety and abundance of wildlife. As of one of 17 megadiverse countries in the world, China has, according to one measure, 7,516 species of vertebrates including 4,936 fish, 1,269 bird, 562 mammal, 403 reptile and 346 amphibian species. In terms of the number of species, China ranks third in the world in mammals,IUCN Initiatives – Mammals – Analysis of Data – Geographic Patterns 2012 IUCN. Retrieved 24 April 2013. Data does not include species in Taiwan. eighth in birds, seventh in reptiles and seventh in amphibians. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nanorana
''Nanorana'' is a genus of dicroglossid frogs. They are found in Asia, from the Himalayan region of northern Pakistan and northern India, Nepal, and western China east to montane southern China and southeast to Myanmar, Thailand, Laos, and northern Vietnam. Common names of these frogs reflect the complex taxonomic history of the genus (see below) and include Yunnan slow frogs (or simply slow frogs) and High Himalaya frogs (for the now-synonymized genus ''Altirana''). Taxonomy The taxonomy of true frogs and their allies has been subject to numerous changes during the last decade and is not yet fully settled. ''Nanorana'' in particular has seen big changes. As currently delineated, ''Nanorana'' is a quite large genus with 28 species, resulting from considering ''Chaparana'', ''Paa'', and ''Feirana'' as junior synonyms. Currently these taxa may be recognized as subgenera In biology, a subgenus (plural: subgenera) is a taxonomic rank directly below genus. In the Internatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snout–vent Length
Snout–vent length (SVL) is a morphometric measurement taken in herpetology from the tip of the snout to the most posterior opening of the cloacal slit (vent)."direct line distance from tip of snout to posterior margin of vent" It is the most common measurement taken in herpetology, being used for all amphibians, lepidosaurs, and crocodilians (for turtles, carapace length (CL) and plastral length (PL) are used instead). The SVL differs depending on whether the animal is struggling or relaxed (if alive), or various other factors if it is a preserved specimen. For fossils, an osteological correlate Osteological correlates are marks on the bones of animals that are made from the causal interactions of the soft-tissue Soft tissue is all the tissue in the body that is not hardened by the processes of ossification or calcification such as bo ... such as precaudal length must be used. When combined with weight and body condition, SVL can help deduce age and sex. Advantages Bec ... [...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] |
Habitat Loss
Habitat destruction (also termed habitat loss and habitat reduction) is the process by which a natural habitat becomes incapable of supporting its native species. The organisms that previously inhabited the site are displaced or dead, thereby reducing biodiversity and species abundance. Habitat destruction is the leading cause of biodiversity loss. Fragmentation and loss of habitat have become one of the most important topics of research in ecology as they are major threats to the survival of endangered species. Activities such as harvesting natural resources, industrial production and urbanization are human contributions to habitat destruction. Pressure from agriculture is the principal human cause. Some others include mining, logging, trawling, and urban sprawl. Habitat destruction is currently considered the primary cause of species extinction worldwide. Environmental factors can contribute to habitat destruction more indirectly. Geological processes, climate change, introdu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grassland
A grassland is an area where the vegetation is dominated by grasses (Poaceae). However, sedge (Cyperaceae) and rush (Juncaceae) can also be found along with variable proportions of legumes, like clover, and other herbs. Grasslands occur naturally on all continents except Antarctica and are found in most ecoregions of the Earth. Furthermore, grasslands are one of the largest biomes on earth and dominate the landscape worldwide. There are different types of grasslands: natural grasslands, semi-natural grasslands, and agricultural grasslands. They cover 31–69% of the Earth's land area. Definitions Included among the variety of definitions for grasslands are: * "...any plant community, including harvested forages, in which grasses and/or legumes make up the dominant vegetation." * "...terrestrial ecosystems dominated by herbaceous and shrub vegetation, and maintained by fire, grazing, drought and/or freezing temperatures." (Pilot Assessment of Global Ecosystems, 2000) * "A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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