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Phylogeography of Oligoryzomys longicaudatus (Rodentia : Sigmodontinae) in temperate South America

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2005-02
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Palma, R. Eduardo
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Phylogeography of Oligoryzomys longicaudatus (Rodentia : Sigmodontinae) in temperate South America
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  • Palma, R. Eduardo;
  • Rivera Milla, Eric;
  • Salazar Bravo, Jorge;
  • Torres Pérez, Fernando;
  • Pardiñas, Ulyses F. J.;
  • Marquet, Pablo A.;
  • Spotorno Oyarzún, Ángel;
  • Meynard, Andrés P.;
  • Yates, Terry L.;
Abstract
Phylogeographic relationships were evaluated at the intraspecific level using nucleotide sequence data from the mitochondrial cytochrome b gene of representative specimens of ‘‘colilargo’’ (Oligoryzomys longicaudatus) from 31 localities, along its distributional range over a large part of the western Andes and southern Argentina. Based on approximately 1,000 base pairs (bp), we recognized a single species on both the Chilean and the Argentinean side as far as at least latitude 518S, rejecting the subspecific distinctiveness of longicaudatus and philippi. We thus placed the latter in full synonymy with O. longicaudatus as earlier studies proposed, and enlarged its range as far as Torres del Paine, about 518S. The occurrence of subspecies in this range is doubtful given the low sequence divergence values and the absence of significant associations between haplotypes and their geography. Additionally, we hypothesized that the entrance of this species into the Chilean side of the Andes mountains occurred through the Patagonian forests of southern Argentina, with further dispersal to the north from the south.
Patrocinador
We greatly appreciate financial support from grants ‘‘Hantavirus ecology and disease in Chile’’ (National Institute of Health—ICIDR 1 U19 AI45452–01 to The University of New Mexico, USA, and to the Pontificia Universidad Cato´ lica de Chile, Chile), CONACYT (Argentina), and FONDECYT 1030488 (Chile).
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URI: https://repositorio.uchile.cl/handle/2250/128417
ISSN: 0022-2372
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JOURNAL OF MAMMALOGY, Volume: 86, Issue: 1, Pages: 191-200, 2005
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