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Microryzomys
''Microryzomys'' is a genus of rodent in the tribe Oryzomyini of family Cricetidae. It is closely related to '' Oreoryzomys'', '' Oligoryzomys'', and ''Neacomys''.Weksler, 2006 It contains two species, both restricted to the Andes: '' M. altissimus'' and '' M. minutus''. Characteristics ''Microryzomys'' species are small members of the rodent tribe Oryzomyini, weighing in the region of , and characterised by their long soft fur and tail longer than their head-and-body-length. They have small hind feet with six fleshy pads on the under surface, and with the fifth toe nearly as long as the middle three. The four pairs of mammae are arranged in the typical fashion for members of the tribe. At one time, this genus was considered to be a subgenus of ''Oryzomys'', but Carleton and Musser (1989) raised it to full generic status on the basis of various anatomic details of skull and dentition and on certain morphological traits. Distribution ''Microryzomys'' is found in high mountainous a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microryzomys
''Microryzomys'' is a genus of rodent in the tribe Oryzomyini of family Cricetidae. It is closely related to '' Oreoryzomys'', '' Oligoryzomys'', and ''Neacomys''.Weksler, 2006 It contains two species, both restricted to the Andes: '' M. altissimus'' and '' M. minutus''. Characteristics ''Microryzomys'' species are small members of the rodent tribe Oryzomyini, weighing in the region of , and characterised by their long soft fur and tail longer than their head-and-body-length. They have small hind feet with six fleshy pads on the under surface, and with the fifth toe nearly as long as the middle three. The four pairs of mammae are arranged in the typical fashion for members of the tribe. At one time, this genus was considered to be a subgenus of ''Oryzomys'', but Carleton and Musser (1989) raised it to full generic status on the basis of various anatomic details of skull and dentition and on certain morphological traits. Distribution ''Microryzomys'' is found in high mountainous a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microryzomys Altissimus
''Microryzomys altissimus'', also known as the Páramo colilargo or highland small rice rat, is a species of rodent in the genus ''Microryzomys'' of family Cricetidae. It is found in Colombia, Ecuador, and Peru, but the Colombian segment may be a separate species. Description The Páramo colilargo has a greyish head, buffish upper parts and greyish-buff underparts and there is a clear demarcation between the dorsal and ventral colouring. The tail is dark above and pale below and is usually shorter than . The feet have whitish hairs on the upper surface, and the metatarsal pads on the soles are narrow. Compared to the closely related '' Microryzomys minutus'', the skull is wider and more robust, with longer incisive foramina and with longer rows of teeth. The diploid chromosomal count is 2n=57 and FN=58. Distribution and habitat This rodent is native to South America where it occurs in the high Andes of Ecuador, Peru and Bolivia. Its altitudinal range is between . Its range inclu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microryzomys Minutus
''Microryzomys minutus'', also known as the montane colilargo or the forest small rice rat, is a species of rodent in the genus ''Microryzomys'' of family Cricetidae. It is found in Bolivia, Colombia, Ecuador, Peru, and Venezuela, but these populations may represent more than one species. Description The montane colilargo is an ochraceous-tawny colour with very little contrast between the dorsal and ventral surfaces. The tail is unicoloured and is at least long in the adult animal. The upper surfaces of the feet have dark markings, and the hind feet are relatively wide, with large metatarsal pads. The skull is narrower, shorter and less robust than that of the closely related ''Microryzomys altissimus'', and all these characteristics help to distinguish between the two species. The karyotype is characterized as 2n=58. Distribution and habitat The species is native to the South American Andes where it is mostly present at altitudes of between , but exceptionally between . Its ran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oryzomyini
Oryzomyini is a tribe of rodents in the subfamily Sigmodontinae of the family Cricetidae. It includes about 120 species in about thirty genera,Weksler et al., 2006, table 1 distributed from the eastern United States to the southernmost parts of South America, including many offshore islands. It is part of the clade Oryzomyalia, which includes most of the South American Sigmodontinae. The name ''Oryzomyini'' derives from that of its type genus, '' Oryzomys'', which means "rice rat" or "rice mouse". Many species are also known as rice rats. Taxonomy Contents of Oryzomyini An oryzomyine group was first envisaged by Oldfield Thomas in the early 20th century. He defined it to include pentalophodont species, which have a mesoloph(id) on the upper and lower molars, with a long palate (extending past the third molars). Thomas included '' Oligoryzomys'', ''Oecomys'', and '' Oryzomys'' (which included many species now in other genera), as well as '' Rhagomys'', which is currently class ... [...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 to rearrange the exhibitions, allowing Thomas to concentrate on these new specimens. Thomas viewed his taxonomy efforts from the scope of British imperialism. "You and I in our scientific lives have seen th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oreoryzomys
''Oreoryzomys balneator'', also known as the Peruvian rice rat or Ecuadoran oryzomys, is a species of rodent in the tribe Oryzomyini of family Cricetidae. It is found in Ecuador and northern Peru in cloud forest at elevations from 1500 to 1800 m. It is the only species in the genus ''Oreoryzomys'', which was included in ''Oryzomys'' until 2006. The genus name ''Oreoryzomys'' is a combination of ορος the Greek word for "mountain" with the old genus name ''Oryzomys'' and refers to the mountainous habitat of ''O. balneator''. Recent research suggests that ''O. balneator'' is not closely related to ''Oryzomys'', but instead is probably related to ''Microryzomys'' within a clade also including ''Neacomys The genus ''Neacomys'', also known as bristly mice because of their spiny fur, includes several species of rodents in the tribe Oryzomyini of family Cricetidae. It is most closely related to ''Oligoryzomys'', ''Oreoryzomys'', and ''Microryzomys'' ...'' and '' Oligoryzomys''. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oligoryzomys
''Oligoryzomys'' is a genus of rodents in the tribe Oryzomyini of family Cricetidae. Many species are known as pygmy rice rats or colilargos.Musser and Carleton, 2005 The genus is found from Mexico to Tierra del Fuego and includes approximately 17 species. In Argentina and Chile, ''Oligoryzomys longicaudatus'' and other members of the genus represent the reservoir for the hantavirus strain Andes virus (ANDV) (Wells et al., 1997; Levis et al., 1998; Cantoni et al., 2001). Taxonomy The genus ''Oligoryzomys'' is included in the subfamily Sigmodontinae of the family Cricetidae. The genus is placed in the Oryzomyini tribe, first proposed by Oldfield Thomas in the early 20th century. It includes genera that have certain dental features of the upper and lower molars and a long palate which extends past the third molars. More recently, molecular analysis and morphological data has placed the genus in Clade C, alongside ''Neacomys'', ''Microryzomys'' and ''Oreoryzomys''. Characteristics ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neacomys
The genus ''Neacomys'', also known as bristly mice because of their spiny fur, includes several species of rodents in the tribe Oryzomyini of family Cricetidae. It is most closely related to ''Oligoryzomys'', ''Oreoryzomys'', and ''Microryzomys''. ''Neacomys'' species are mainly found in the Amazon basin, but '' N. pictus'' occurs in Panama and '' N. tenuipes'' in montane Colombia.Musser and Carleton, 2005 Species There are currently about 19 described species in the genus. *''Neacomys aletheia'' — upper Juruá bristly mouse *''Neacomys amoenus'' — pleasant bristly mouse *'' Neacomys dubosti'' — Dubost's bristly mouse *'' Neacomys guianae'' — Guiana bristly mouse *''Neacomys elieceri'' — Eliecer's bristly mouse *''Neacomys jau'' — Jaú bristly mouse *''Neacomys macedoruizi'' — Macedo Ruiz's bristly mouse *''Neacomys marajoara'' — Marajó bristly mouse *'' Neacomys minutus'' — small bristly mouse *'' Neacomys musseri'' — Musser's bristly mouse *'' Neacomys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oryzomys
''Oryzomys'' is a genus of semiaquatic rodents in the tribe Oryzomyini living in southern North America and far northern South America. It includes eight species, two of which—the marsh rice rat (''O. palustris'') of the United States and '' O. couesi'' of Mexico and Central America—are widespread; the six others have more restricted distributions. The species have had eventful taxonomic histories, and most species were at one time included in the marsh rice rat; additional species may be recognized in the future. The name ''Oryzomys'' was established in 1857 by Spencer Fullerton Baird for the marsh rice rat and was soon applied to over a hundred species of American rodents. Subsequently, the genus gradually became more narrowly defined until its current contents were established in 2006, when ten new genera were established for species previously placed in ''Oryzomys''. Species of ''Oryzomys'' are medium-sized rats with long, coarse fur. The upperparts are gray ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cordillera Central (Colombia)
The Cordillera Central ( en, Central Ranges) is the highest of the three branches of the Colombian Andes. The range extends from south to north dividing from the Colombian Massif in Cauca Department to the Serranía de San Lucas in Bolivar Departments. The highest peak is Nevado del Huila at . Geography The range is bounded by the Cauca and Magdalena river valleys to the west and east, respectively. Highest Peaks * Nevado del Huila - - Cauca, Huila & Tolima * Nevado del Ruiz - - Caldas & Tolima * Nevado del Tolima - - Tolima * Nevado de Santa Isabel - - Risaralda, Tolima & Caldas * Nevado del Quindio - - Quindio, Tolima & Risaralda * Cerro Pan de Azucar - - Cauca & Huila * Puracé - - Cauca & Huila Protected Areas * PNN Los Nevados * PNN Nevado del Huila * PNN Puracé * PNN Las Hermosas * PNN Selva de Florencia * SFF Otún Quimbaya * SFF Serranía de las Minas - proposed See also * Geography of Colombia * Andean Region, Colombia * Cordillera Occidental (Colom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rodent Genera
Rodents (from Latin , 'to gnaw') are mammals of the order Rodentia (), which are characterized by a single pair of continuously growing incisors in each of the upper and lower jaws. About 40% of all mammal species are rodents. They are native to all major land masses except for New Zealand, Antarctica, and several oceanic islands, though they have subsequently been introduced to most of these land masses by human activity. Rodents are extremely diverse in their ecology and lifestyles and can be found in almost every terrestrial habitat, including human-made environments. Species can be arboreal, fossorial (burrowing), saltatorial/richochetal (leaping on their hind legs), or semiaquatic. However, all rodents share several morphological features, including having only a single upper and lower pair of ever-growing incisors. Well-known rodents include mice, rats, squirrels, prairie dogs, porcupines, beavers, guinea pigs, and hamsters. Rabbits, hares, and pikas, whose ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Páramo Fauna
Páramo () can refer to a variety of alpine tundra ecosystems located in the Andes Mountain Range, South America. Some ecologists describe the páramo broadly as "all high, tropical, montane vegetation above the continuous timberline". A narrower term classifies the páramo according to its regional placement in the northern Andes of South America and adjacent southern Central America. The páramo is the ecosystem of the regions above the continuous forest line, yet below the permanent snowline. It is a "Neotropical high mountain biome with a vegetation composed mainly of giant rosette plants, shrubs and grasses". According to scientists, páramos may be "evolutionary hot spots", that meaning that it's among the fastest evolving regions on Earth. Location The Northern Andean Páramo global ecoregion includes the Cordillera Central páramo (Ecuador, Peru), Santa Marta páramo (Colombia), Cordillera de Merida páramo (Venezuela) and Northern Andean páramo (Colombia, Ecuador) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
