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Intha Umbilicalis
''Intha umbilicalis'' is a species of air-breathing freshwater snail, an aquatic pulmonate gastropod in the ram's horn snail family, Planorbidae. Distribution This species is found in: * Sri Lanka * India (Andhra Pradesh, Assam, Bihar, Delhi, Jammu-Kashmir, Madhya Pradesh, Maharashtra, Manipur, Orissa, Rajasthan, Uttaranchal, Uttar Pradesh, West Bengal) * Nepal * Bangladesh * China * Taiwan * Myanmar * Cambodia * Laos * Thailand * Vietnam * Malaysia * Indonesia * Philippines * Papua New Guinea Ecology Parasites of ''Intha umbilicalis'' include: * '' Fasciolopsis buski'' * ''Paragonimus westermani'' * ''Gastrodiscoides hominis ''Gastrodiscoides'' is genus of zoonotic trematode under the class Trematoda. It has only one species, ''Gastrodiscoides hominis''. It is a parasite of a variety of vertebrates, including humans. The first definitive specimen was described from ...'' * '' Cercaria helicorbisi'' References External links * Brandt R. A. M. (1974). "The non-marin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Henry Benson
William Henry Benson (1803, probably in Dublin - 27 January 1870) was a civil servant in British India and an amateur malacologist. He made large collections of molluscs and described numerous speciesNaggs F. (1997). "William Benson and the early study of land snails in British India and Ceylon". ''Archives of Natural History'' 24(1): 37-88PDF from the U.K., India and South Africa. He joined Haileybury College in 1819 and joined the East India Company at Bengal. He reached Calcutta on 30 October 1821 and worked in a number of positions including a District Collector and Officiating Judge in Meerut, Bareilly and other parts of northern India. During his stay in India he collected specimens of numerous land snails some of which he sent to Hugh Cuming in England. On the return from a trip to Mauritius he brought a couple of living ''Achatina fulica'' which he gave to a friend in Calcutta in April 1847 who subsequently released them in a garden at Chowringhee. The species is today a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freshwater Snail
Freshwater snails are gastropod mollusks which live in fresh water. There are many different families. They are found throughout the world in various habitats, ranging from ephemeral pools to the largest lakes, and from small seeps and springs to major rivers. The great majority of freshwater gastropods have a shell, with very few exceptions. Some groups of snails that live in freshwater respire using gills, whereas other groups need to reach the surface to breathe air. In addition, some are amphibious and have both gills and a lung (e.g. ''Ampullariidae''). Most feed on algae, but many are detritivores and some are filter feeders. According to a 2008 review of the taxonomy, there are about 4,000 species of freshwater gastropods (3,795–3,972). At least 33–38 independent lineages of gastropods have successfully colonized freshwater environments. It is not possible to quantify the exact number of these lineages yet, because they have yet to be clarified within the Cerit ... [...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] |
Pulmonate
Pulmonata or pulmonates, is an informal group (previously an order, and before that a subclass) of snails and slugs characterized by the ability to breathe air, by virtue of having a pallial lung instead of a gill, or gills. The group includes many land and freshwater families, and several marine families. The taxon Pulmonata as traditionally defined was found to be polyphyletic in a molecular study per Jörger ''et al.'', dating from 2010. Pulmonata are known from the Carboniferous Period to the present. Pulmonates have a single atrium and kidney, and a concentrated, symmetrical, nervous system. The mantle cavity is located on the right side of the body, and lacks gills, instead being converted into a vascularised lung. Most species have a shell, but no operculum, although the group does also include several shell-less slugs. Pulmonates are hermaphroditic, and some groups possess love darts. Linnean taxonomy The taxonomy of this group according to the taxonomy of the Ga ... [...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] |
Planorbidae
Planorbidae, common name the ramshorn snails or ram's horn snails, is a family of air-breathing freshwater snails, aquatic pulmonate gastropod molluscs. Unlike most molluscs, the blood of ram's horn snails contains iron-based hemoglobin instead of copper-based hemocyanin. As a result, planorbids are able to breathe oxygen more efficiently than other molluscs. The presence of hemoglobin gives the body a reddish colour. This is especially apparent in albino animals. Being air breathers like other ''Panpulmonata'', planorbids do not have gills, but instead have a lung. The foot and head of planorbids are rather small, while their thread-like tentacles are relatively long. Many of the species in this family have coiled shells that are planispiral, in other words, the shells are more or less coiled flat, rather than having an elevated spire as is the case in most gastropod shells. Although they carry their shell in a way that makes it appear to be dextral, the shell of coiled pl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Non-marine Molluscs Of India
The non-marine molluscs of India are a part of the molluscan fauna of India. There are 5070 species of marine and non-marine molluscs living in the wild in India. There are 3371 species of marine molluscs in India.Aravind N. A., Rajshekhar K. P. & Madhaystha N. A''Patterns of Land Snail Distribution in the Western Ghats'' last change 10 October 2006, accessed 1 March 2009. There are 1671 species of non-marine molluscs living in the wild in India. This includes 1488 terrestrial species in 140 genera and 183 freshwater species in 53 genera. There are a total of species of gastropods, which breaks down to ?? species of freshwater gastropods, and 1488 species of land gastropods, plus ?? species of bivalves living in the wild. ;Summary table of number of species Freshwater gastropods Neritidae * '' Neripteron auriculatum'' (Lamarck, 1816)'' * '' Neripteron violaceum'' (Gmelin, 1791) * '' Neritina pulligera'' (Linnaeus, 1767)(file created 29 July 2010FRESH WATER MOLLUSCAN SP ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fasciolopsis Buski
''Fasciolopsis'' () is a genus of trematodes. They are also known as giant intestinal flukes. Only one species is recognised: ''Fasciolopsis buski''. It is a notable parasite of medical importance in humans and veterinary importance in pigs. It is prevalent in Southern and Eastern Asia. The term for infestation with ''Fasciolopsis'' is fasciolopsiasis. ''Fasciolopsis buski'' ''Fasciolopsis buski'' is commonly called the giant intestinal fluke, because it is an exceptionally large parasitic fluke, and the largest known to parasitise humans. Its size is variable and a mature specimen might be as little as 2 cm long, but the body may grow to a length of 7.5 cm and a width of 2.5 cm. It is a common parasite of humans and pigs and is most prevalent in Southern and Southeastern Asia. It is a member of the family Fasciolidae in the order Plagiorchiida. The Echinostomida are members of the class Trematoda, the flukes. The fluke differs from most species that parasitis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paragonimus Westermani
''Paragonimus westermani'' (Japanese lung fluke or oriental lung fluke) is the most common species of lung fluke that infects humans, causing paragonimiasis. Human infections are most common in eastern Asia and in South America. Paragonimiasis may present as a sub-acute to chronic inflammatory disease of the lung. It was discovered by Coenraad Kerbert (1849–1927) in 1878. Causative agent More than 30 species of trematodes (flukes) of the genus ''Paragonimus'' have been reported to infect animals and humans. Among the more than 10 species reported to infect humans, the most common is ''Paragonimus westermani'', the oriental lung fluke. Morphology In size, shape, and color, ''Paragonimus westermani'' resembles a coffee bean when alive. Adult worms are 7.5 mm to 12 mm long and 4 mm to 6 mm wide. The thickness ranges from 3.5 mm to 5 mm. The skin of the worm ( tegument) is thickly covered with scalelike spines. The oral and ventral suckers are simil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastrodiscoides Hominis
''Gastrodiscoides'' is genus of zoonotic trematode under the class Trematoda. It has only one species, ''Gastrodiscoides hominis''. It is a parasite of a variety of vertebrates, including humans. The first definitive specimen was described from a human subject in 1876. It is prevalent in Bangladesh, India, Burma, China, Kazakhstan, Philippines, Thailand, Vietnam, and the Volga Delta of Russia, with isolated cases from Africa, such as Nigeria. It is especially notable in the Assam, Bengal, Bihar, Madhya Pradesh, Orissa and Uttar Pradesh regions of India. It is also known as the colonic fluke, particularly when infecting other animals. Its natural habitat is the colon of pigs, and has also been found in rhesus monkeys, orang-utans, fish, field rats and Napu mouse-deer. In humans the habitat is on the wall of the caecum. Humans are considered an accidental host, as the parasite can survive without humans. It causes a helminthic disease called gastrodiscoidiasis. History of disc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cercaria Helicorbisi
A cercaria (plural cercariae) is the larval form of the trematode class of parasites. It develops within the germinal cells of the sporocyst or redia. A cercaria has a tapering head with large penetration glands. It may or may not have a long swimming "tail", depending on the species. The motile cercaria finds and settles in a host where it will become either an adult, or a mesocercaria, or a metacercaria, according to species. Rotifers ('' Rotaria rotatoria'') produce a chemical, Schistosome Paralysis Factor, suppressing cercaria swimming and reducing infections.{{cite journal , editor1-last=Khosla , editor1-first=Chaitan , last1=Gao, first1=Jiarong, last2=Yang, first2=Ning, last3=Lewis, first3=Fred A., last4=Yau, first4=Peter, last5=Collins, first5=James J., last6=Sweedler, first6=Jonathan V., last7=Newmark, first7=Phillip A., title=A rotifer-derived paralytic compound prevents transmission of schistosomiasis to a mammalian host, journal=PLOS Biology, volume=17, issue=10, year ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
