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Rice Rat
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] |
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] |
Hylaeamys
''Hylaeamys'' is a genus of South American oryzomyine rodents found principally in humid forested areas east of the Andes. The species in this genus have historically been placed in ''Oryzomys''. They are most closely related to ''Euryoryzomys'', ''Transandinomys'', '' Nephelomys'', '' Oecomys'', and ''Handleyomys'', and most closely resemble species of the former two genera. They are distinguished from members of ''Euryoryzomys'' by all-dark or indistinct two-tone tail coloration (as opposed to the distinct two-tone tail coloration of ''Euryoryzomys''), from members of ''Transandinomys'' by having shorter whiskers above their eyes that do not extend posteriorly behind their ears, and in both cases by differences in carotid circulation. The genus is named after ''hylaea'' ("forest" in Greek), the term used by Humboldt for the lowland South American rainforests that are the main habitat of the genus. The genus currently comprises the following species: * '' Hylaeamys acritus'' * ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oecomys
''Oecomys'' is a genus of rodent within the tribe Oryzomyini of family Cricetidae. It contains about 17 species, which live in trees and are distributed across forested parts of South America, extending into Panama and Trinidad Trinidad is the larger and more populous of the two major islands of Trinidad and Tobago. The island lies off the northeastern coast of Venezuela and sits on the continental shelf of South America. It is often referred to as the southernmos .... References Literature cited *Carleton, M.D., Emmons, L.H. and Musser, G.G. 2009A new species of the rodent genus ''Oecomys'' (Cricetidae: Sigmodontinae: Oryzomyini) from eastern Bolivia, with emended definitions of ''O. concolor'' (Wagner) and ''O. mamorae'' (Thomas) ''American Museum Novitates'' 3661:1–32. Rodent genera Taxa named by Oldfield Thomas {{Oecomys-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Noronhomys
''Noronhomys vespuccii'', also known as Vespucci's rodent, is an extinct rat species from the islands of Fernando de Noronha off northeastern Brazil. Italian explorer Amerigo Vespucci may have seen it on a visit to Fernando de Noronha in 1503, but it subsequently became extinct, perhaps because of the exotic rats and mice introduced by the first explorers of the island. Numerous but fragmentary fossil remains of the animal, of uncertain but probably Holocene age, were discovered in 1973 and described in 1999. ''Noronhomys vespuccii'' was a fairly large rodent, larger than the black rat (''Rattus rattus''). A member of the family Cricetidae and subfamily Sigmodontinae, it shares several distinctive characters with ''Holochilus'' and related genera within the tribe Oryzomyini, including high-crowned molars with simplified crown features and the presence of several ridges on the skull which help anchor the chewing muscles. Although a suite of traits suggest that ''Holochilus'' is i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nesoryzomys
''Nesoryzomys'' is a genus of rodent in the tribe Oryzomyini of family Cricetidae, endemic to the Galápagos Islands. Five species have been described, with two of them considered extinct Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and .... Other rodents restricted to the Galápagos include '' Megaoryzomys curioi'' and '' Aegialomys galapagoensis''. References Castañeda-Rico, S., Johnson, S. A., Clement, S. A., Dowler, R. C., Maldonado, J. E., & Edwards, C. W. (2019). Insights into the evolutionary and demographic history of the extant endemic rodents of the Galápagos Islands. Therya, 10(3). https://doi.org/10.12933/therya-19-873 Endemic fauna of the Galápagos Islands Rodent genera Taxonomy articles created by Polbot {{Sigmodontinae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nephelomys
''Nephelomys'' is a genus of South American oryzomyine rodents found in the Andes from Bolivia to Venezuela, with a westward extension into the mountains of Costa Rica. Its generic name is derived from the Ancient Greek word ''nephelê'' "mist", referring to the cloud forest habitat of the members of the genus. The species in this genus have historically been placed in ''Oryzomys'', but in 2006, Brazilian zoologist Marcelo Weksler and coworkers described it as a separate genus, because it is not closely related to the type species of ''Oryzomys''.Weksler, 2006 They are most closely related to other members of clade B, including ''Euryoryzomys'', ''Transandinomys'', '' Hylaeamys'', '' Oecomys'', and ''Handleyomys'', with some weak evidence supporting a sister-group relationship to ''Transandinomys''.Weksler et al., 2006, p. 20 ''Oryzomys'' appears in a different part of the oryzomyine evolutionary radiation, perhaps close to ''Holochilus'' and related genera. ''Nephelomys'' spec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nectomys
''Nectomys'' is a genus of rodent in the tribe Oryzomyini of family Cricetidae. Musser and Carleton, 2005. It is closely related to ''Amphinectomys'' and was formerly considered congeneric with ''Sigmodontomys''. It consists of five species, which are allopatrically distributed across much of South America: ''Nectomys grandis'' in montane Colombia; ''Nectomys palmipes'' on Trinidad and in nearby Venezuela, ''Nectomys apicalis'' in the western margins of the Amazon biome, ''Nectomys rattus'' in much of Amazonia, and ''Nectomys squamipes'' in the Atlantic Forest of Brazil. These species are generally semiaquatic In biology, semiaquatic can refer to various types of animals that spend part of their time in water, or plants that naturally grow partially submerged in water. Examples are given below. Semiaquatic animals Semiaquatic animals include: * Verte ..., are normally found near water, and are commonly called water rats. Notes References Literature cited * Rodent g ... [...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 *''Neacom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mindomys
''Mindomys'' is a genus of sigmodontine rodents in the family Cricetidae. It includes two species known only from Ecuador, Hammond's rice rat ''Mindomys hammondi'', also known as Hammond's rice rat or Hammond's oryzomys,Musser and Carleton, 2005, p. 1149 is an endangered species of rodent in the tribe Oryzomyini of family Cricetidae. Formerly considered to be related with ''Nect ... (''Mindomys hammondi'') and the Kutukú rat (''Mindomys kutuku''). See also * List of mammals of Ecuador References Oryzomyini Rodent genera Endemic fauna of Ecuador Mammals of Ecuador {{Sigmodontinae-stub ... [...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] |
Microakodontomys
The transitional colilargo (''Microakodontomys transitorius'') also known as the intermediate lesser grass mouse, is a species of rodent in the tribe Oryzomyini known only from two individuals found in the Federal District of Brazil. Although described as a link between oryzomyine and akodontine rodents and placed in its own genus, ''Microakodontomys'', Weksler and coworkers dismissed it as an aberrant ''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 1 ...''.Weksler et al., 2006 References Literature cited *Musser, G.G. and Carleton, M.D. 2005. Superfamily Muroidea. Pp. 894–1531 in Wilson, D.E. and Reeder, D.M. (eds.)Mammal Species of the World: a taxonomic and geographic reference. 3rd ed Baltimore: The Johns Hopkins University Press, 2 vols., 2142 pp. * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Melanomys
''Melanomys'' is a genus of rodent in the tribe Oryzomyini of family Cricetidae, which is distributed in northern South America and adjacent Central America. It contains three species, two of which—'' Melanomys robustulus'' and '' Melanomys zunigae''—have limited distributions. The third, ''Melanomys caliginosus ''Melanomys caliginosus'', also known as the dusky melanomysMusser and Carleton, 2005 or dusky rice rat, is a species of rodent in the genus '' Melanomys'' of family Cricetidae. It is found from Central America, in Honduras, Nicaragua, Costa Rica ...'', is more widely distributed, but may be a species complex. References Rodent genera Taxa named by Oldfield Thomas Taxonomy articles created by Polbot {{Sigmodontinae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
