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Oligoryzomys longicaudatus : ウィキペディア英語版 | Oligoryzomys longicaudatus
''Oligoryzomys longicaudatus'', also known as the long-tailed colilargo〔Musser and Carleton, 2005〕 or long-tailed pygmy rice rat,〔 is a species of rodent in the genus ''Oligoryzomys'' of the family Cricetidae. It is found in the southern Andes of Chile and Argentina, with an outlying population in eastern Argentina. As a common species with a wide range and a stable population, the International Union for Conservation of Nature has rated this rodent as being of "least concern".〔 ==Description== ''O. longicaudatus'' grows to a total length of , including a tail of , and weighs about . The ears are quite small and are scantily clad with hairs. The tail is also scantily haired and is dark above and pale on the underside. The fur on the back is buff with fine pale brown and black lines, the greyish base of the hairs sometimes being visible. The underparts are greyish-white. The tail is shorter at the southern end of the range, and in Argentina, the fur is tinted with ochre, especially on the flanks. Its karyotype has 2n = 58 and FNa = 74.
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