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''Oligoryzomys nigripes'', also known as the black-footed colilargo〔Musser and Carleton, 2005〕 or the black-footed pygmy rice rat,〔 is a rodent in the genus ''Oligoryzomys'' of family Cricetidae. It is found from Pernambuco in northeastern Brazil through the Atlantic Forest and Cerrado into Paraguay, Uruguay, and Argentina, where it occurs in the provinces of Chaco, Misiones, and Buenos Aires.〔Weksler and Bonvicino, 2005, p. 119〕 Two other species, ''Oligoryzomys delticola'' (also known as the delta pygmy rice rat〔Pardinas and D'Elia, 2008〕 or the large colilargo)〔 and ''Oligoryzomys eliurus'' (also known as the Brazilian pygmy rice rat〔Leite and Patterson, 2008〕 or the Brazilian colilargo)〔 have been recognized as synonyms of ''O. nigripes'' since 2005; they cannot be distinguished on the basis of morphology, karyotype, or morphometrics.〔Weksler and Bonvicino, 2005, p. 120〕 It is a large species with long ears, dark yellow to dark brown upperparts, sharply delimited from the whitish underparts, and often a pink girdle on the chest. The karyotype is 2n = 62, FNa = 78–82.〔 ==References== ==Literature cited== *Leite, Y. and Patterson, B. 2008. . In IUCN. IUCN Red List of Threatened Species. Version 2009.2. <(www.iucnredlist.org )>. Downloaded on November 28, 2009. * *Pardinas, U. and D'Elia, G. 2008. . In IUCN. IUCN Red List of Threatened Species. Version 2009.2. <(www.iucnredlist.org )>. Downloaded on November 28, 2009. *Weksler, M. & Bonvicino, C.R. 2005. Taxonomy of pygmy rice rats genus ''Oligoryzomys'' Bangs, 1900 (Rodentia, Sigmodontinae) of the Brazilian Cerrado, with the description of two new species. Arquivos do Museu Nacional 63(1):113–130. *Weksler, M., Bonvicino, C., D'Elia, G. and Teta, P. 2008. . In IUCN. IUCN Red List of Threatened Species. Version 2009.2. <(www.iucnredlist.org )>. Downloaded on November 28, 2009. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Oligoryzomys nigripes」の詳細全文を読む スポンサード リンク
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