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Nephelomys Meridensis
''Nephelomys meridensis'', also known as the Mérida oryzomys,Musser and Carleton, 2005, p. 1151 is a species of rodent in the genus ''Nephelomys'' of family Cricetidae.Weksler et al., 2006, p. 18 It is found in cloud forest in the Sierra Nevada de Mérida of western Venezuela at elevations from 1100 to 4000 m. It is solitary, nocturnal and terrestrial, and has a varied diet. ''N. meridensis'' has thick fur, which is about 11 mm long at the back. The color of the upperparts is rufous, with brown on the head, and becomes lighter towards the sides. The coloration of the underparts, which is well demarcated from that of the upper parts, is greyish, with a pure white area at the chest. The very large ears are covered with thin dark hairs. The hand and feet, whitish in color, are sparsely haired. The tail is brown above and somewhat paler below, and is not well-furred. The incisive foramina, openings in the palate before the molars, are short. In the holotype, the head and body le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oldfield Thomas
Michael Rogers Oldfield Thomas (21 February 1858 – 16 June 1929) was a British zoologist. Career Thomas worked at the Natural History Museum on mammals, describing about 2,000 new species and subspecies for the first time. He was appointed to the museum secretary's office in 1876, transferring to the zoological department in 1878. In 1891, Thomas married Mary Kane, daughter of Sir Andrew Clark, heiress to a small fortune, which gave him the finances to hire mammal collectors and present their specimens to the museum. He also did field work himself in Western Europe and South America. His wife shared his interest in natural history, and accompanied him on collecting trips. In 1896, when William Henry Flower took control of the department, he hired Richard Lydekker Richard Lydekker (; 25 July 1849 – 16 April 1915) was an English naturalist, geologist and writer of numerous books on natural history. Biography Richard Lydekker was born at Tavistock Square in London. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hylaeamys Megacephalus
''Hylaeamys megacephalus'', also known as Azara's broad-headed oryzomys or the large-headed rice rat, is a species of rodent in the genus ''Hylaeamys'' of family Cricetidae, of which it is the type species. It is found mainly in lowland tropical rainforest from its type locality in Paraguay north through central Brazil, French Guiana, Guyana, Suriname, and Venezuela onto Trinidad and Tobago. To its west and east, other closely related species of ''Hylaeamys'' are found: '' H. perenensis'' in western Amazonia, '' H. acritus'' in Bolivia, and '' H. laticeps'' and '' H. oniscus'' in the Atlantic Forest of eastern Brazil. Taxonomy It was first described by Spanish naturalist Félix de Azara. Based on his description, several names were given to the animal, including ''Mus megacephalus'' Fischer, 1814 and ''Mus capito'' Olfers, 1818, both of which were largely forgotten for over a century. When ''capito'' was rediscovered in 1960, it came in use (as ''Oryzomys capito'') for a "sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mammals Of Venezuela
The fauna of Venezuela consists of a huge variety of animals. Venezuela's diverse wildlife includes manatees, Amazon river dolphins, and Orinoco crocodiles, which have been reported to reach up to in length. Some 23% of reptilian and 50% of amphibian species that inhabit the country are endemic to Venezuela. Overall, around 8,000 species (the world's 5th highest total) are endemic to the country. Venezuela hosts a total of 1,417 bird species, more than 351 mammals, 341 reptiles, 315 amphibians and more than 2,000 freshwater and marine fishes. Invertebrates groups have not been inventoried exhaustively, but among the well known groups there are around 900 species of marine molluscs, 1,600 butterflies, over 120 dung beetles species and 39 species of blowflies.Capelo, Juan C., Buitrago, Joaquín. 1998: Distribución geográfica de los moluscos marinos en el oriente de Venezuela. Memoria de la Sociedad de Ciencias Naturales La Salle, LXIII(150):109-160 Birds There are 1,416 bird s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Museum Of Natural History
The American Museum of Natural History (abbreviated as AMNH) is a natural history museum on the Upper West Side of Manhattan in New York City. In Theodore Roosevelt Park, across the street from Central Park, the museum complex comprises 26 interconnected buildings housing 45 permanent exhibition halls, in addition to a planetarium and a library. The museum collections contain over 34 million specimens of plants, animals, fossils, minerals, rocks, meteorites, human remains, and human cultural artifacts, as well as specialized collections for frozen tissue and genomic and astrophysical data, of which only a small fraction can be displayed at any given time. The museum occupies more than . AMNH has a full-time scientific staff of 225, sponsors over 120 special field expeditions each year, and averages about five million visits annually. The AMNH is a private 501(c)(3) organization. Its mission statement is: "To discover, interpret, and disseminate—through scientific research and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IUCN
The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of natural resources. It is involved in data gathering and analysis, research, field projects, advocacy, and education. IUCN's mission is to "influence, encourage and assist societies throughout the world to conserve nature and to ensure that any use of natural resources is equitable and ecologically sustainable". Over the past decades, IUCN has widened its focus beyond conservation ecology and now incorporates issues related to sustainable development in its projects. IUCN does not itself aim to mobilize the public in support of nature conservation. It tries to influence the actions of governments, business and other stakeholders by providing information and advice and through building partnerships. The organization is best known to the wider ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IUCN Red List Of Threatened Species
The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is the world's most comprehensive inventory of the global conservation status of biological species. It uses a set of precise criteria to evaluate the extinction risk of thousands of species and subspecies. These criteria are relevant to all species and all regions of the world. With its strong scientific base, the IUCN Red List is recognized as the most authoritative guide to the status of biological diversity. A series of Regional Red Lists are produced by countries or organizations, which assess the risk of extinction to species within a political management unit. The aim of the International Union for Conservation of Nature, IUCN Red List is to convey the urgency of conservation issues to the public and policy makers, as well as help the international community to reduce species extinction. According to International Unio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Táchira (state)
Táchira State ( es, Estado Táchira, ) is one of the 23 states of Venezuela. The state capital is San Cristóbal. Táchira State covers a total surface area of and as of the 2011 census, had a population of 1,168,908. At the end of the 19th century, Táchira State was where oil was discovered in Venezuela. Currently, its main economic revenues come from the production of coffee and pineapple. The cattle and agricultural activities play an important role in Táchira's economy. There is also a strong industrial sector which focuses on the processing of potato, sugar, milk, and cheese and the production of textiles. Táchira State is one of the three Venezuelan Andean states (the other two are Mérida and Trujillo). This state borders Zulia State to the north, Barinas and Mérida States to the east, Apure and Barinas States to the south, and Colombia (Norte de Santander Department) to the west. Etymology Possible origins have been identified for the word Táchira, so one ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nephelomys Caracolus
''Nephelomys caracolus'', also known as the Costa Central oryzomysMusser and Carleton, 2005, p. 1146 or caracol rice rat, is a species of rodent in the genus ''Nephelomys'' of family Cricetidae.Weksler et al., 2006, p. 18 It is found in cloud forest in the Cordillera de la Costa Central of Aragua, Miranda, and the Distrito Federal in north-central Venezuela at elevations from 1000 to 2500 m. It is nocturnal and terrestrial, and has a varied diet. In most ''Nephelomys'' species, the posterolateral palatal pits, perforations of the palate near the third molar, are conspicuous and receded into a fossa, but in ''N. caracolus'' and the Ecuadorian species '' N. nimbosus'', the pits are much smaller.Wekser et al., 2006, p. 19 Oldfield Thomas originally described the species, in 1914, as a member of ''Oryzomys'', ''Oryzomys caracolus''. From 1960 on, it was included in '' Oryzomys capito'', the current ''Hylaeamys megacephalus'', and subsequently in '' Oryzomys albigularis''. In the 1990 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Morphometrics
Morphometrics (from Greek μορϕή ''morphe'', "shape, form", and -μετρία ''metria'', "measurement") or morphometry refers to the quantitative analysis of ''form'', a concept that encompasses size and shape. Morphometric analyses are commonly performed on organisms, and are useful in analyzing their fossil record, the impact of mutations on shape, developmental changes in form, covariances between ecological factors and shape, as well for estimating quantitative-genetic parameters of shape. Morphometrics can be used to quantify a trait of evolutionary significance, and by detecting changes in the shape, deduce something of their ontogeny, function or evolutionary relationships. A major objective of morphometrics is to statistically test hypotheses about the factors that affect shape. "Morphometrics", in the broader sense, is also used to precisely locate certain areas of organs such as the brain, and in describing the shapes of other things. Forms Three general appro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karyotype
A karyotype is the general appearance of the complete set of metaphase chromosomes in the cells of a species or in an individual organism, mainly including their sizes, numbers, and shapes. Karyotyping is the process by which a karyotype is discerned by determining the chromosome complement of an individual, including the number of chromosomes and any abnormalities. A karyogram or idiogram is a graphical depiction of a karyotype, wherein chromosomes are organized in pairs, ordered by size and position of centromere for chromosomes of the same size. Karyotyping generally combines light microscopy and photography, and results in a photomicrographic (or simply micrographic) karyogram. In contrast, a schematic karyogram is a designed graphic representation of a karyotype. In schematic karyograms, just one of the sister chromatids of each chromosome is generally shown for brevity, and in reality they are generally so close together that they look as one on photomicrographs as well ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philip Hershkovitz
Philip Hershkovitz (12 October 1909 – 15 February 1997) was an American mammalogy, mammalogist. Born in Pittsburgh, he attended the Universities of Pittsburgh and Michigan and lived in South America collecting mammals. In 1947, he was appointed a curator at the Field Museum of Natural History in Chicago and he continued to work there until his death. He has published much on the mammals of the Neotropics, particularly primates and rodents, and described almost 70 new species and subspecies of mammals. About a dozen species have been named after him. Life Early life Philip Hershkovitz was born 12 October 1909 in Pittsburgh to parents Aba and Bertha (Halpern) Hershkovitz. He was the second child and only son among four siblings. He reported that his father died when he was nine years old. After graduating from Schenley High School in 1927, he attended the University of Pittsburgh from 1929 to 1931, majoring in zoology, before transferring to the University of Michigan at Ann Arb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nephelomys Albigularis
''Nephelomys albigularis'', also known as the white-throated oryzomys or Tomes's rice rat, is a species of rodent in the genus '' Nephelomys'' of family Cricetidae. Described in 1860, it was the first ''Nephelomys'' species to be discovered. It was originally described in the defunct genus '' Hesperomys'' as ''Hesperomys albigularis'' and considered related to the much smaller ''H. longicaudatus'' (currently ''Oligoryzomys longicaudatus''). By 1894, it was placed in ''Oryzomys'', as ''Oryzomys albigularis'', and associated with what is now '' Nephelomys meridensis''. In the early 1960s, the scope of the species was considerably expanded to include most of the species that are now in ''Nephelomys'', as well as a single name, ''boliviae'', that is currently a synonym of '' Euryoryzomys nitidus''. From 1976 on, several of these were reinstated as separate species.Musser and Carleton, 2005, p. 1145 In 2006, a phylogenetic analysis by Marcelo Weksler of the oryzomyine tribe, in which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
