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Rhagomys
''Rhagomys'' is a genus of South American rodents in the tribe Thomasomyini of the family Cricetidae. Two species separated by about 3100 km are known, from southeast Peru and Bolivia east of the Andes, and in the Atlantic Forest of southeast Brazil. An undetermined species of ''Rhagomys'' has also been reported from Mato Grosso in central Brazil. The species are as follows: * Long-tongued arboreal mouse (''Rhagomys longilingua'') * Brazilian arboreal mouse (''Rhagomys rufescens'') This genus is distinguished from other sigmodontine rodents by the presence of a nail on the hallux. Nuclear DNA sequence analysis has indicated that it is a sister taxon to ''Thomasomys''. The geographic distribution may reflect a formerly continuous distribution made disjunct by extinctions, or may reflect limited sampling of the intervening areas. While no other mammal taxa have a similar geographic distribution, a group of hylid frogs does. ''Juscelinomys'' is an example of another sigmodo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhagomys
''Rhagomys'' is a genus of South American rodents in the tribe Thomasomyini of the family Cricetidae. Two species separated by about 3100 km are known, from southeast Peru and Bolivia east of the Andes, and in the Atlantic Forest of southeast Brazil. An undetermined species of ''Rhagomys'' has also been reported from Mato Grosso in central Brazil. The species are as follows: * Long-tongued arboreal mouse (''Rhagomys longilingua'') * Brazilian arboreal mouse (''Rhagomys rufescens'') This genus is distinguished from other sigmodontine rodents by the presence of a nail on the hallux. Nuclear DNA sequence analysis has indicated that it is a sister taxon to ''Thomasomys''. The geographic distribution may reflect a formerly continuous distribution made disjunct by extinctions, or may reflect limited sampling of the intervening areas. While no other mammal taxa have a similar geographic distribution, a group of hylid frogs does. ''Juscelinomys'' is an example of another sigmodo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhagomys Rufescens
The Brazilian arboreal mouse (''Rhagomys rufescens'') is a South American rodent species of the family Cricetidae. It is found in the Atlantic Forest of southeast Brazil, often close to bamboo thickets. It can be distinguished from '' Rhagomys longilingua'', the only other species in its genus, by the absence of spines among the hair. Formerly believed to be extinct after no sightings were recorded for over 100 years, the species has since been found in four localities. However, it is nowhere common, and all of these are forest fragments, and ongoing deforestation threatens the species' survival. For these reasons, the International Union for Conservation of Nature has assessed its conservation status as being " vulnerable". Description The Brazilian arboreal mouse is a small mouse with small rounded ears and vibrissae (whiskers) long enough to reach the ears. The dorsal fur is reddish-brown which gradually fades to reddish-grey on the ventral surface. The hair is soft, and this d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brazilian Arboreal Mouse
The Brazilian arboreal mouse (''Rhagomys rufescens'') is a South American rodent species of the family Cricetidae. It is found in the Atlantic Forest of southeast Brazil, often close to bamboo thickets. It can be distinguished from '' Rhagomys longilingua'', the only other species in its genus, by the absence of spines among the hair. Formerly believed to be extinct after no sightings were recorded for over 100 years, the species has since been found in four localities. However, it is nowhere common, and all of these are forest fragments, and ongoing deforestation threatens the species' survival. For these reasons, the International Union for Conservation of Nature has assessed its conservation status as being " vulnerable". Description The Brazilian arboreal mouse is a small mouse with small rounded ears and vibrissae (whiskers) long enough to reach the ears. The dorsal fur is reddish-brown which gradually fades to reddish-grey on the ventral surface. The hair is soft, and this d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Long-tongued Arboreal Mouse
The long-tongued arboreal mouse (''Rhagomys longilingua'') is a South American rodent species of the family Cricetidae. It is found in a variety of habitats, including dense forest, in Bolivia and Peru at elevations from on the eastern side of the Andes. The species is at least partly arboreal. It is distinguished from the Brazilian arboreal mouse (''R. rufescens''), the only other known member of ''Rhagomys'', by spiny fur and certain skull features such as the presence of beading in the interorbital region. Description The adult long-tongued arboreal mouse weighs in the range and has a tail that is nearly as long as the head-and-body length. The fur is short and dense, and consists of a mixture of long slender hairs and spines, giving the mouse a bristly appearance. The upper parts are olive-brown and the underparts are buffish ochre with fewer spines. The tail is dark above and slightly paler below, with rings of scales, and hairs increasing in length towards the tip and endi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhagomys Longilingua
The long-tongued arboreal mouse (''Rhagomys longilingua'') is a South American rodent species of the family Cricetidae. It is found in a variety of habitats, including dense forest, in Bolivia and Peru at elevations from on the eastern side of the Andes. The species is at least partly arboreal. It is distinguished from the Brazilian arboreal mouse (''R. rufescens''), the only other known member of ''Rhagomys'', by spiny fur and certain skull features such as the presence of beading in the interorbital region. Description The adult long-tongued arboreal mouse weighs in the range and has a tail that is nearly as long as the head-and-body length. The fur is short and dense, and consists of a mixture of long slender hairs and spines, giving the mouse a bristly appearance. The upper parts are olive-brown and the underparts are buffish ochre with fewer spines. The tail is dark above and slightly paler below, with rings of scales, and hairs increasing in length towards the tip and endi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sigmodontine
The rodent subfamily Sigmodontinae includes New World rats and mice, with at least 376 species. Many authorities include the Neotominae and Tylomyinae as part of a larger definition of Sigmodontinae. When those genera are included, the species count numbers at least 508. Their distribution includes much of the New World, but the genera are predominantly South American, such as brucies. They invaded South America from Central America as part of the Great American Interchange near the end of the Miocene, about 5 million years ago. Sigmodontines proceeded to diversify explosively in the formerly isolated continent. They inhabit many of the same ecological niches that the Murinae occupy in the Old World. The "Thomasomyini" from the Atlantic Forest of Brazil are generally thought to be not especially related to the "real" Thomasomyini from the northern Andes and the Amazon rainforest. The genera '' Wiedomys'' and '' Sigmodon'' are generally placed in their own tribe, and the "phyllot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomasomys
''Thomasomys'' is a genus of rodent in the family Cricetidae, named after British zoologist Oldfield Thomas. Nuclear DNA sequence analysis has indicated that it is a sister taxon to '' Rhagomys''. It contains the following species: * Anderson's Oldfield mouse (''Thomasomys andersoni'') * Antonio Brack's Oldfield mouse (''Thomasomys antoniobracki'') * Apeco Oldfield mouse (''Thomasomys apeco'') * Golden Oldfield mouse (''Thomasomys aureus'') * Beady-eyed mouse (''Thomasomys baeops'') * Silky Oldfield mouse The silky Oldfield mouse (''Thomasomys bombycinus'') is a species of rodent in the family Cricetidae. It is found only in Colombia Colombia (, ; ), officially the Republic of Colombia, is a country in South America with insular regions ... (''Thomasomys bombycinus'') * Burneo’s Oldfield mouse (''Thomasomys burneoi'') * White-tipped Oldfield mouse (''Thomasomys caudivarius'') * Ashy-bellied Oldfield mouse (''Thomasomys cinereiventer'') * Ash-colored Oldfie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ocelot
The ocelot (''Leopardus pardalis'') is a medium-sized spotted wild cat that reaches at the shoulders and weighs between on average. It was first described by Carl Linnaeus in 1758. Two subspecies are recognized. It is native to the southwestern United States, Mexico, Central and South America, and to the Caribbean islands of Trinidad and Margarita. It prefers areas close to water sources with dense vegetation cover and high prey availability. Typically active during twilight and at night, the ocelot tends to be solitary and territorial. It is efficient at climbing, leaping and swimming. It preys on small terrestrial mammals, such as armadillos, opossums, and lagomorphs. Both sexes become sexually mature at around two years of age and can breed throughout the year; peak mating season varies geographically. After a gestation period of two to three months the female gives birth to a litter of one to three kittens. They stay with their mother for up to two years, after which the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ice Age
An ice age is a long period of reduction in the temperature of Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers. Earth's climate alternates between ice ages and greenhouse periods, during which there are no glaciers on the planet. Earth is currently in the Quaternary glaciation. Individual pulses of cold climate within an ice age are termed ''glacial periods'' (or, alternatively, ''glacials, glaciations, glacial stages, stadials, stades'', or colloquially, ''ice ages''), and intermittent warm periods within an ice age are called '' interglacials'' or ''interstadials''. In glaciology, ''ice age'' implies the presence of extensive ice sheets in both northern and southern hemispheres. By this definition, Earth is currently in an interglacial period—the Holocene. The amount of anthropogenic greenhouse gases emitted into Earth's oceans and atmosphere is predicted to prevent the next glacial period for th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleistocene
The Pleistocene ( , often referred to as the ''Ice age'') is the geological Epoch (geology), epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was finally confirmed in 2009 by the International Union of Geological Sciences, the cutoff of the Pleistocene and the preceding Pliocene was regarded as being 1.806 million years Before Present (BP). Publications from earlier years may use either definition of the period. The end of the Pleistocene corresponds with the end of the last glacial period and also with the end of the Paleolithic age used in archaeology. The name is a combination of Ancient Greek grc, label=none, πλεῖστος, pleīstos, most and grc, label=none, καινός, kainós (latinized as ), 'new'. At the end of the preceding Pliocene, the previously isolated North and South American continents were joined by the Isthmus of Panama, causing Great American Interchang ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Juscelinomys
''Juscelinomys'' is a genus of burrowing mice. The name is derived from Brazilian president Juscelino Kubitschek who created the city of Brasilia where the Brasilia burrowing mouse was discovered. There are two living species: * †''J. candango'' Candango mouse * ''J. guaporensis'' Rio Guaporé mouse * ''J. huanchacae'' Huanchaca mouse A fourth species, ''J. talpinus'', is known only from subfossil A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in ... remains. Some authorities treat it as a distinct species or a senior synonym for one or all species in ''Juscelinomys''. References * {{Taxonbar, from=Q910254 Rodent genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fieldiana Zoology
The Field Museum of Natural History (FMNH), also known as The Field Museum, is a natural history museum in Chicago, Illinois, and is one of the largest such museums in the world. The museum is popular for the size and quality of its educational and scientific programs, and its extensive scientific-specimen and artifact collections. The permanent exhibitions, which attract up to two million visitors annually, include fossils, current cultures from around the world, and interactive programming demonstrating today's urgent conservation needs. The museum is named in honor of its first major benefactor, Marshall Field, the department-store magnate. The museum and its collections originated from the 1893 World's Columbian Exposition and the artifacts displayed at the fair. The museum maintains a temporary exhibition program of traveling shows as well as in-house produced topical exhibitions. The professional staff maintains collections of over 24 million specimens and objects tha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
