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Tchangmargarya
''Tchangmargarya'' is a genus of large operculate freshwater snails, aquatic gastropod mollusks in the family Viviparidae. Taxonomy ''Tchangmargarya'' originally was a subgenus of '' Margarya'', and is elevated to a full genus based on molecular phylogeny and comparative morphology study. Distribution This genus appear to be endemic to Yangzong Lake and lakes in Stone Forest in Yunnan Province in the China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and .... Species There are 3 extant species of ''Tchangmargarya'': * '' Tchangmargarya yangtsunghaiensis'' (Tchang & Tsi, 1949) -type species Di L., Jiang Y., Min W., Yeuing L., Aldridge D. & McIvor A. (2008)''Margarya yangtsunghaiensis'' In: IUCN 2010. IUCN Red List of Threatened Species. Version 2010.3. . Downloaded on 14 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tchangmargarya Ziyi
''Tchangmargarya'' is a genus of large operculate freshwater snails, aquatic gastropod mollusks in the family Viviparidae. Taxonomy ''Tchangmargarya'' originally was a subgenus of '' Margarya'', and is elevated to a full genus based on molecular phylogeny and comparative morphology study. Distribution This genus appear to be endemic to Yangzong Lake and lakes in Stone Forest in Yunnan Province in the China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and .... Species There are 3 extant species of ''Tchangmargarya'': * '' Tchangmargarya yangtsunghaiensis'' (Tchang & Tsi, 1949) -type species Di L., Jiang Y., Min W., Yeuing L., Aldridge D. & McIvor A. (2008)''Margarya yangtsunghaiensis'' In: IUCN 2010. IUCN Red List of Threatened Species. Version 2010.3. . Downloaded on 14 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Margarya Yangtsunghaiensis
''Tchangmargarya yangtsunghaiensis'' is a species of large operculate freshwater snail, an aquatic gastropod mollusk in the family Viviparidae, the river snails. This species used to be assigned to '' Margarya'', and is the type species of ''Tchangmargarya''. Distribution The distribution of ''Tchangmargarya yangtsunghaiensis'' includes Yangzong Lake in Yunnan Province, China. Description The diploid chromosome number of ''Tchangmargarya yangtsunghaiensis'' is 2n=24. Chen Y. X., Zhang N. G., Zhang W. & Li J. K. (1996). "The karyotype study of ''Margarya yaungtsunghaiensis'' and ''M. melanioides'' (Viviparidae)". ''Zoological Research'' 17: 94-96. (In Chinese with English abstract) Zhang et al. (2015) provided details about the shell and about the radula The radula (, ; plural radulae or radulas) is an anatomical structure used by molluscs for feeding, sometimes compared to a tongue. It is a minutely toothed, chitinous ribbon, which is typically used for scraping o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Margarya
''Margarya'' is a genus of large operculate freshwater snails, aquatic gastropod mollusks in the family Viviparidae.Bouchet, P. (2014). Margarya G. Nevill, 1877. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=758767 on 2014-12-10 Taxonomy The genus ''Margarya'' was described by Nevill (1877) based on shells of the type species collected by A.R. Margary from Lake Erhai, the type locality of ''Margarya melanioides''. Based on shell and radular morphology, Tchang & Tsi (1949) revised this genus for the first time and recognized seven distinct species. He created two subgenera of ''Margarya'' , viz ''Tchangmargarya'' and ''Mabillemargarya''. The first molecular phylogeny showed that the genus ''Margarya'' is polyphyletic and divided into three distinct clades. Combining study of comparative morphology and molecular phylogeny, Zhang ''et al''. revised the systematics of ''Margarya'' and recognized eight genuine extant sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tchangmargarya Multilabiata
''Tchangmargarya multilabiata'' is a species of large operculate freshwater snail, an aquatic gastropod mollusk in the family Viviparidae, the river snails. Distribution This species appear to be endemic to lakes in Stone Forest, e.g. Lake Changhu, Lake Yuehu and Lake Guangtangzi in Yunnan Province in the China. Description Zhang et al. (2015) provided details about the shell and about the radula The radula (, ; plural radulae or radulas) is an anatomical structure used by molluscs for feeding, sometimes compared to a tongue. It is a minutely toothed, chitinous ribbon, which is typically used for scraping or cutting food before the food .... References Viviparidae {{Viviparidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Viviparidae
Viviparidae, sometimes known as the river snails or mystery snails, are a family of large operculate freshwater snails, aquatic gastropod mollusks. This family is classified in the informal group Architaenioglossa according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005. Distribution This family occurs nearly worldwide in temperate and tropical regions, with the exception that they are absent from South America. There are two genera of Viviparidae in Africa: ''Bellamya'' and ''Neothauma''. The oldest known vivparid is ''Viviparus langtonensis'' from the Middle Jurassic of England. The oldest records from the Southern Hemisphere is from the Late Jurassic Talbragar fossil beds of Australia. Taxonomy The family Viviparidae contains 3 subfamilies (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005): * Viviparinae Gray, 1847 (1833) - synonyms: Paludinidae Fitzinger, 1833 (inv.); Kosoviinae Atanackovic, 1859 (n.a.) * Bellamyinae Rohrbach, 193 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aquatic Animal
An aquatic animal is any animal, whether invertebrate or vertebrate, that lives in water for most or all of its lifetime. Many insects such as mosquitoes, mayflies, dragonflies and caddisflies have aquatic larvae, with winged adults. Aquatic animals may breathe air or extract oxygen from water through specialised organs called gills, or directly through the skin. Natural environments and the animals that live in them can be categorized as aquatic (water) or terrestrial (land). This designation is polyphyletic. Description The term aquatic can be applied to animals that live in either fresh water or salt water. However, the adjective marine is most commonly used for animals that live in saltwater, i.e. in oceans, seas, etc. Aquatic animals (especially freshwater animals) are often of special concern to conservationists because of the fragility of their environments. Aquatic animals are subject to pressure from overfishing, destructive fishing, marine pollution, hunting, and cli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People's Republic Of China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and borders fourteen countries by land, the most of any country in the world, tied with Russia. Covering an area of approximately , it is the world's third largest country by total land area. The country consists of 22 provinces, five autonomous regions, four municipalities, and two Special Administrative Regions (Hong Kong and Macau). The national capital is Beijing, and the most populous city and financial center is Shanghai. Modern Chinese trace their origins to a cradle of civilization in the fertile basin of the Yellow River in the North China Plain. The semi-legendary Xia dynasty in the 21st century BCE and the well-attested Shang and Zhou dynasties developed a bureaucratic political system to serve hereditary monarchies, or dyna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yunnan Province
Yunnan , () is a landlocked province in the southwest of the People's Republic of China. The province spans approximately and has a population of 48.3 million (as of 2018). The capital of the province is Kunming. The province borders the Chinese provinces of Guizhou, Sichuan, autonomous regions of Guangxi, and Tibet Autonomous Region, Tibet as well as Southeast Asian countries: Vietnam, Laos, and Myanmar. Yunnan is China's fourth least developed province based on disposable income per capita in 2014. Yunnan is situated in a mountainous area, with high elevations in the northwest and low elevations in the southeast. Most of the population lives in the eastern part of the province. In the west, the altitude can vary from the mountain peaks to river valleys by as much as . Yunnan is rich in natural resources and has the largest diversity of plant life in China. Of the approximately 30,000 species of Vascular plant, higher plants in China, Yunnan has perhaps 17,000 or more. Yun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stone Forest
The Stone Forest or Shilin () is a notable set of limestone formations about 500 km2 located in Shilin Yi Autonomous County, Yunnan Province, People's Republic of China, near Shilin approximately from the provincial capital Kunming. The tall rocks seem to arise from the ground in a manner somewhat reminiscent of stalagmites, or with many looking like petrified trees, thereby creating the illusion of a forest made of stone. Since 2007, two parts of the site, the Naigu Stone Forest () and Suogeyi Village (), have been UNESCO World Heritage Sites as part of the South China Karst. The site is classified as a AAAAA-class tourist site. Features Shilin National Scenic Area () covers an area of and is divided into seven scenic areas as follows: * Greater & Lesser Stone Forests () - also known as the Lizijing Stone Forest () * Naigu Stone Forest () * Zhiyun Cave () * Lake Chang (长湖 literally ''Long Lake'') * Lake Yue (月湖 literally ''Moon Lake'') * Dadieshui Waterfall ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yangzong Lake
Yangzonghai Lake () (given on some maps as Yangzong Sea, though it is fresh water) is located between Yiliang County, Chenggong District and Chengjiang County, 45 kilometers east of Kunming City in Yunnan Province, China. About 30,000 people rely on the Lake as their drinking water. Yangzonghai Lake is noted for its underwater springs and is one of several scenic areas in Yunnan province, which is known for its biodiversity. The lake is a popular resort destination for people living in the nearby provincial capital of Kunming, which itself borders Dianchi Lake, one of China's biggest freshwater lakes but also one of its most polluted. Pollution As recently as 2002, Yangzonghai had been noted for having water clean enough for drinking and swimming. But as of September 2008, it was officially considered unfit for drinking, swimming in or fishing in, when the provincial government announced high levels of arsenic in its waters. The arsenic contamination was discovered (in June 20 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mollusk
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is estimated between 60,000 and 100,000 additional species. The proportion of undescribed species is very high. Many taxa remain poorly studied. Molluscs are the largest marine phylum, comprising about 23% of all the named marine organisms. Numerous molluscs also live in freshwater and terrestrial habitats. They are highly diverse, not just in size and anatomical structure, but also in behaviour and habitat. The phylum is typically divided into 7 or 8 taxonomic classes, of which two are entirely extinct. Cephalopod molluscs, such as squid, cuttlefish, and octopuses, are among the most neurologically advanced of all invertebrates—and either the giant squid or the colossal squid is the largest known invertebrate species. The gas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastropod
The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. There are many thousands of species of sea snails and slugs, as well as freshwater snails, freshwater limpets, and land snails and slugs. The class Gastropoda contains a vast total of named species, second only to the insects in overall number. The fossil history of this class goes back to the Late Cambrian. , 721 families of gastropods are known, of which 245 are extinct and appear only in the fossil record, while 476 are currently extant with or without a fossil record. Gastropoda (previously known as univalves and sometimes spelled "Gasteropoda") are a major part of the phylum Mollusca, and are the most highly diversified class in the phylum, with 65,000 to 80,000 living snail and slug species. The anatomy, behavior, feeding, and re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
