New species of Akodon (Rodentia: Cricetidae: Sigmodontinae) from central Argentina

作者：Braun Janet K^*; Mares Michael A; Coyner Brandi S; Van den Bussche Ronald A

来源：Journal of Mammalogy, 2010, 91(2): 387-400.

DOI：10.1644/09-MAMM-A-048.1

• Akodon
• Argentina
• cytochrome b
• morphology
• new species
• phylogeny
• sigmodonotines
• South America
• systematics
• taxonomy

A new species of Akodon (sigmodontine rodents of the tribe Akodontini) is described from the Cordoba Montane Savanna Ecoregion in the eastern mountain ranges of the Sierras Centrales in central Argentina. Phylogenetic relationships among the new species and 11 other species of Akodon were examined using nucleotide sequence data from the entire 1,140 base pans of the mitochondrial cytochrome-b gene. Maximum-parsimony, maximum-likelihood, and Bayesian analyses found the new species to be distinct from other Akodon and sister to a clade composed of A spegazzum, A boliviensis. and A oenos. We present analyses of morphological data and descriptions of external, cranial, and dental morphology This species is relevant to the insular biogeography of the Sierras Centrales, the uniqueness of the ecoregion, and the level of plant and animal endemism in isolated montane regions of central Argentina DOI. 10 1644/09-MAMM-A-048 1

• 出版日期2010-4-16