Thomasomys
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Thomasomys
''Thomasomys'' is a genus of rodents 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'') * '' Thomasomys auricularis'' * Beady-eyed mouse (''Thomasomys baeops'') * Silky Oldfield mouse (''Thomasomys bombycinus'') * Burneo’s Oldfield mouse (''Thomasomys burneoi'') * White-tipped Oldfield mouse (''Thomasomys caudivarius'') * Ashy-bellied Oldfield mouse (''Thomasomys cinereiventer'') * Ash-colored Oldfield mouse (''Thomasomys cinereus'') * Cinnamon-colored Oldfield mouse (''Thomasomys cinnameus'') * Daphne's Oldfield mouse (''Thomasomys daphne'') * Peruvian Oldfield mouse (''Thomasomys eleusis'') * Wandering Oldfield mo ...
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Thomasomys Cinereus
The ash-colored Oldfield mouse (''Thomasomys cinereus'') is a species of rodent in the genus ''Thomasomys''. It is found in montane forests of the Department of Cajamarca in northern Peru, at elevations of . Until 2023, it was thought to be more widely distributed, ranging into southern Ecuador, but these populations are now identified as three separate, closely related species, '' T. lojapiuranus'', '' T. pagaibambensis'', and '' T. shallqukucha''. With a head-body length of , ''Thomasomys cinereus'' is a medium-sized species for the genus. Distinguishing characteristics compared to its close relatives include, among others: * Mystacial vibrissae (whiskers above the mouth) short (long in ''T. lojapiuranus'' and ''T. pagaibambensis'') * Tail shorter than or equal to head and body (longer in the other three species) * Tail slightly paler above than below (same color above and below in the other species; ''T. pagaibambensis'' additionally has a white tail tip) * Inci ...
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Thomasomys Auricularis
''Thomasomys auricularis'' commonly known as the red Andean thomasomys is a species of rodent in the genus ''Thomasomys'' found in the western Andes of southwestern Ecuador. Taxonomy Although described in 1923 by Harold Elmer Anthony, ''T. auricularis'' was treated as synonym or subspecies of '' Thomasomys pyrrhonotus'' until they were identified as a separate species in 2003 and officially recognized in Mammal Species of the World (2005). Description ''Thomasomys auricularis'' is medium in size for its genus, with a head-body length of . It is characterized by its relatively long tail, moderately long hindfoot, large skull, and large, inflated auditory bullae. Initially it was compared to the similar looking '' T. aureus'' and '' T. pyrrhonotus'' but has a few distinguishing characteristics. The skull is smaller than ''T. aureus.'' The tail is longer than ''T. pyrrhonotus''. The auditory bullae is larger ''T. aureus'' but comparatively smaller than ''T. pyrrhonotus''. Distribu ...
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Thomasomys Lojapiuranus
''Thomasomys lojapiuranus'' is a species of rodent in the genus ''Thomasomys'' known from Peru and Ecuador. It consists of populations that were identified as ''Thomasomys cinereus'' until they were identified as a new species in 2023. The species occurs in the Department of Piura in northern Peru and the adjacent Loja Province of southern Ecuador. The scientific name combines the names of these two administrative units. It occurs in montane forest Montane ecosystems are found on the slopes of mountains. The alpine climate in these regions strongly affects the ecosystem because temperatures lapse rate, fall as elevation increases, causing the ecosystem to stratify. This stratification is ... at an altitude of up to . The lowest elevation record is at , but this record is suspect as it is unusually low for ''Thomasomys'' and in an unusual habitat. The lowest secure record is at . Characteristic traits include brownish fur on the back, gray or brown fur on the lower side, and ...
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Thomasomys Cinnameus
The cinnamon-colored Oldfield mouse (''Thomasomys cinnameus''), also called the "cinnamon-colored Thomasomys", is a species of rodent in the family Cricetidae. It is present in the Cordillera Oriental of the Andes from north central Ecuador to southern Colombia, at elevations from . It has terrestrial habits, and has been found in cloud forest A cloud forest, also called a water forest, primas forest, or tropical montane cloud forest, is a generally tropical or subtropical, evergreen, Montane forest, montane, Tropical and subtropical moist broadleaf forests, moist forest characteri ... and mossy areas. It was formerly considered a subspecies of '' T. gracilis''. References Mammals of Ecuador Mammals of Colombia Thomasomys Mammals described in 1924 {{Thomasomys-stub ...
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Thomasomys Hudsoni
Hudson's Oldfield mouse (''Thomasomys hudsoni'') is a species of rodent in the family Cricetidae. It is known only from the Andes in southern Ecuador, where it has been found at an elevation of 3100 m. It was formerly considered a subspecies of '' T. gracilis''. It is named after American zoologist Wilfred Hudson Osgood Wilfred Hudson Osgood (December 8, 1875 – June 20, 1947) was an American zoologist. Biography Osgood was born in Rochester, New Hampshire, the oldest child of a family of watchmakers. The family moved to California in 1888 and he went to study .... References Mammals of Ecuador Thomasomys Mammals described in 1923 {{Thomasomys-stub ...
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Thomasomys Burneoi
Burneo’s Oldfield mouse (''Thomasomys burneoi'') is a species of sigmodontine rodent in the family Cricetidae known from Sangay National Park in the eastern Andes, central Ecuador. The species is named after Ecuadorian mammalogist . See also * List of mammals of Ecuador This is a list of the mammal species recorded in Ecuador. There are 317 mammal species in Ecuador, of which two are critically endangered, ten are endangered, twenty-three are vulnerable, and seven are near threatened. Two of the species listed for ... References Thomasomys Endemic fauna of Ecuador Mammals of Ecuador Mammals described in 2022 {{Thomasomys-stub ...
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Thomasomys Erro
The wandering Oldfield mouse (''Thomasomys erro''), also called the wandering thomasomys, is a species of rodent in the family Cricetidae. It has been found in both the Cordillera Oriental and Cordillera Occidental of the Andes in central and north central Ecuador, at elevations from 2400 to 3600 m. It has terrestrial habits, and has been found in cloud forest A cloud forest, also called a water forest, primas forest, or tropical montane cloud forest, is a generally tropical or subtropical, evergreen, Montane forest, montane, Tropical and subtropical moist broadleaf forests, moist forest characteri ... and areas of secondary vegetation. It was formerly considered a subspecies of '' T. cinereiventer''. References Mammals of Ecuador Thomasomys Mammals described in 1926 {{Thomasomys-stub ...
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Thomasomys Andersoni
Anderson's Oldfield mouse (''Thomasomys andersoni'') is a species of rodent in the family Cricetidae The Cricetidae are a family of rodents in the large and complex superfamily Muroidea. It includes true hamsters, voles, lemmings, muskrats, and New World rats and mice. At over 870 species, it is either the largest or second-largest family .... References Thomasomys Mammals described in 2007 {{Thomasomys-stub ...
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Thomasomys Daphne
Daphne's Oldfield mouse (''Thomasomys daphne'') is a species of rodent in the family Cricetidae. It is found in Bolivia and Peru Peru, officially the Republic of Peru, is a country in western South America. It is bordered in the north by Ecuador and Colombia, in the east by Brazil, in the southeast by Bolivia, in the south by Chile, and in the south and west by the Pac .... References * Baillie, J. 1996.Thomasomys daphne 2006 IUCN Red List of Threatened Species. Downloaded on 20 July 2007. *Musser, G. G. and M. D. Carleton. 2005. Superfamily Muroidea. pp. 894–1531 ''in'' Mammal Species of the World a Taxonomic and Geographic Reference. D. E. Wilson and D. M. Reeder eds. Johns Hopkins University Press, Baltimore. Thomasomys Mammals described in 1917 Taxa named by Oldfield Thomas Taxonomy articles created by Polbot {{Thomasomys-stub ...
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Thomasomys Cinereiventer
The ashy-bellied Oldfield mouse (''Thomasomys cinereiventer'') is a species of rodent in the family Cricetidae. It is found in Colombia and Ecuador Ecuador, officially the Republic of Ecuador, is a country in northwestern South America, bordered by Colombia on the north, Peru on the east and south, and the Pacific Ocean on the west. It also includes the Galápagos Province which contain .... References * Baillie, J. 1996.Thomasomys cinereiventer 2006 IUCN Red List of Threatened Species. Downloaded on 9 July 2007. *Musser, G. G. and M. D. Carleton. 2005. Superfamily Muroidea. pp. 894–1531 ''in'' Mammal Species of the World a Taxonomic and Geographic Reference. D. E. Wilson and D. M. Reeder eds. Johns Hopkins University Press, Baltimore. Thomasomys Mammals of Colombia Mammals of Ecuador Mammals described in 1912 Taxonomy articles created by Polbot {{Thomasomys-stub ...
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Thomasomys Monochromos
The unicolored Oldfield mouse (''Thomasomys monochromos'') is a species of rodent in the family Cricetidae. It is found only in Colombia. References

*Musser, G. G. and M. D. Carleton. 2005. Superfamily Muroidea. pp. 894–1531 ''in'' Mammal Species of the World a Taxonomic and Geographic Reference. D. E. Wilson and D. M. Reeder eds. Johns Hopkins University Press, Baltimore. Thomasomys Endemic fauna of Colombia Mammals of Colombia Mammals described in 1900 Taxonomy articles created by Polbot Taxa named by Outram Bangs {{Thomasomys-stub ...
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Thomasomys Macrotis
The large-eared Oldfield mouse (''Thomasomys macrotis'') is a species of rodent in the family Cricetidae. It is known only from a single locality in the Andes in north central Peru (which includes Rio Abiseo National Park), in montane forest at an elevation of 3300 m. It has terrestrial habits and is sympatric In biology, two closely related species or populations are considered sympatric when they exist in the same geographic area and thus frequently encounter each other. An initially interbreeding population that splits into two or more distinct spe ... with '' T. apeco''. References Mammals of Peru Thomasomys Mammals described in 1993 {{Thomasomys-stub ...
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