Molecular systematics of Abrothrix longipilis (Rodentia: Cricetidae: Sigmodontinae) in Chile

We evaluated systematic relationships among most of the subspecies of the long-haired sigmodontine mouse Abrothrix longipilis in Chile. We sequenced the complete cytochrome-b gene and 634 base pairs of intron 7 of the β-fibrinogen gene from specimens from 17 localities along the distributional range...

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Bibliographic Details
Published in:Journal of mammalogy 2010-10, Vol.91 (5), p.1102-1111
Main Authors: Palma, R. Eduardo, Cancino, Ricardo A., Rodríguez-Serrano, Enrique
Format: Article
Language:English
Subjects:
Abrothrix longipilis
Biological and medical sciences
Chile
Cricetidae
Cytochrome b
cytochrome-b gene
Differentiation
FEATURE ARTICLES
Forests
Fundamental and applied biological sciences. Psychology
Geographic regions
glaciation
Introns
Mammalia
Mammalogy
Mammals
Natural history
Parsimony
Phylogenetics
Phylogeny
Races
Rodentia
Sigmodontinae
subspecies
Systematics
Taxa
Temperate forests
Temperate regions
Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution
β-fibrinogen
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Summary:We evaluated systematic relationships among most of the subspecies of the long-haired sigmodontine mouse Abrothrix longipilis in Chile. We sequenced the complete cytochrome-b gene and 634 base pairs of intron 7 of the β-fibrinogen gene from specimens from 17 localities along the distributional range of A. longipilis. Phylogenetic analyses confirm Abrothrix sanborni, once considered a subspecies of A. longipilis, as a valid species. In the latter taxon we obtained a structured phylogenetic pattern that recovered most of the geographic races traditionally recognized for this mouse. However, strong differentiation was found between A. l. longipilis from Mediterranean Chile and subspecies from the Temperate and Patagonian Forests in the south, suggesting that the former could constitute a different species. We concluded that historical events (glaciations), coupled with local selection pressures (different ecogeographic zones), might account for the current geographic pattern of variation in A. longipilis.
ISSN:0022-2372
1545-1542
DOI:10.1644/10-MAMM-A-031.1