The Phyllotis xanthopygus complex (Rodentia, Cricetidae) in central Andes, systematics and description of a new species
The Phyllotis xanthopygus complex (Rodentia, Cricetidae) in central Andes, systematics and description of a new species
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DOI：
10.1111/zsc.12510
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发表时间：
2021-08
影响因子：
2.5
通讯作者：
J. P. Jayat;P. Teta;A. Ojeda;Scott J. Steppan;Jared M. Osland;P. Ortiz;A. Novillo;C. Lanzone;R. Ojeda
中科院分区：
文献类型：
--
作者：
J. P. Jayat;P. Teta;A. Ojeda;Scott J. Steppan;Jared M. Osland;P. Ortiz;A. Novillo;C. Lanzone;R. Ojeda
1837年是南美洲最受研究的啮齿动物之一。据目前了解，它包括20个以岩石生境为主的中小型物种。其中，黄臀叶耳鼠的种群，传统上被称为P. xanthopygus (Waterhouse 1837)，分布最广泛，从秘鲁中部延伸到智利南部和阿根廷。以往的研究主要基于分子证据，认为黄杉属构成了一个物种复合体，具有地理结构和遗传分化的特征。在这项工作中，我们使用单变量和多变量分析比较了分布在安第斯山脉中部东坡种群的分子系统发育假说和形态计量学证据。定量形态学和分子证据表明，从玻利维亚南部到阿根廷中西部，至少有四种近乎隐蔽的P. xanthopygus复合体。其中三个分类群有可用的名称；其中一种是caprinus，目前已被确认为种；另外两个是p.x . posticalis - P的分支。x. rupestris和P. vaccarum都被认为是P. xanthopygus的亚种。剩下的分类群代表了一个分布在阿根廷安第斯山脉中西部的新物种。我们根据其他证据来源（如定性和定量状态特征、遗传和系统发育研究以及细胞遗传学数据）讨论了形态学结果，并将新物种命名为P. pehuenche，以纪念历史上居住在阿根廷安第斯山脉中西部的原始土著人。
Phyllotis Waterhouse 1837 is one of the most studied genera of South American cricetid rodents. As currently understood, it includes 20 small to medium‐sized species of predominantly rocky habitats. Among them, populations of the yellow‐rumped leaf‐eared mouse, traditionally referred to P. xanthopygus (Waterhouse 1837), are the most widely distributed, extending from central Peru to southern Chile and Argentina. Based mostly on molecular evidence, previous studies suggested that P. xanthopygus constitutes a species complex, being characterized by geographically structured and genetically divergent clades. In this work, we compare the molecular phylogenetic hypothesis for populations distributed on the eastern slopes of the central Andes with morphometric evidence using univariate and multivariate analyses. Quantitative morphological and molecular evidence suggests that at least four nearly cryptic species of the P. xanthopygus complex occur from southern Bolivia to west‐central Argentina. Three of these taxa have available names; one of them, P. caprinus, is currently recognized to the species level; the other two, the clades of P. x. posticalis‐P. x. rupestris and P. vaccarum, are both recognized as subspecies of P. xanthopygus. The remaining taxon represents a new species distributed in the west‐central Andes of Argentina. We discuss our morphological results in the light of other sources of evidence (e.g. qualitative and quantitative state characters, genetic and phylogenetic studies, and cytogenetic data) and name the new species as P. pehuenche, honouring the original native people that historically inhabited west‐central Andes of Argentina.