Abstract The José María Arguedas’ grass mouse, Akodon josemariarguedasi, is currently known from the central Yungas of Peru, ranging from the right (south) side of the Río Huallaga in Huánuco Department (in the north) to Junín Department (in the south); its phylogenetic affinities are unknown. We collected four specimens from Quintao, Tayacaja, Huancavelica Department allocated to this species, extending the species range 144 km farther south from its previous known distribution; and inferred the phylogenetic relationships of this species within the aerosus species group based on molecular analyses of the mitochondrial cytochrome b gene. We confirm that A. josemariarguedasi is a member of the aerosus species group and it is a sister taxon to Akodon mollis “Ancash” and then to Akodon torques. Also, we found that Akodon kotosh is closely related to Akodon orophilus, and not A. josemariarguedasi. Finally, we confirm that Akodon budini and Akodon siberiae are also members of the aerosus species group.

中文翻译：

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Akodon josemariarguedasi (Rodentia: Cricetidae) 的范围扩展和系统发育关系以及对 aerosus 物种组的评论

摘要 José María Arguedas 的草鼠 Akodon josemariarguedasi 目前生活在秘鲁中部的永加斯，分布范围从瓦努科省（北部）的 Río Huallaga 的右侧（南）到胡宁省（南部） ; 它的系统发育亲和性是未知的。我们从 Quintao、Tayacaja、Huancavelica 部门收集了分配给该物种的四个标本，将物种范围从其先前已知分布向南扩展了 144 公里；并根据线粒体细胞色素 b 基因的分子分析推断该物种在 aerosus 物种组中的系统发育关系。我们确认 A. josemariarguedasi 是 aerosus 物种组的成员，它是 Akodon mollis “Ancash”的姊妹分类单元，然后是 Akodon 扭矩。还，我们发现 Akodon kotosh 与 Akodon orophilus 密切相关，而不是 A. josemariarguedasi。最后，我们确认 Akodon budini 和 Akodon siberiae 也是 aerosus 物种组的成员。