ABSTRACT: Montane systems, formed by a series of climatic oscillations and temporal topographic metamorphoses, have broken up the contiguous distribution of widespread species and accelerated allopatric speciation. We used a partial fragment of the mitochondrial cytochrome b (cytb) gene to address speciation across the entire range of the Siberian ibex Capra sibirica. We demonstrated that the Siberian ibex is a polytypic species, plausibly formed by a combination of at least 2 species and/or 3 to 4 sub-species. Bayesian phylogeny showed that the Indian-Tajikistan (I-T) clade is adequately diverged from the other clades based on the mean intra-specific distance criterion, and warrants recognition as a distinct species. We provide pragmatic evidence for the endorsement of the I-T clade as a distinct species of Siberian ibex and urge prioritization of the conservation of this species at global and regional scales.

中文翻译：

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印度西伯利亚高地山羊Capra sibirica的异源物种形成的遗传证据

摘要：由一系列气候振荡和时间形变形成的Montane系统破坏了广泛物种的连续分布并加速了异源物种形成。我们使用线粒体细胞色素b（cytb）基因的部分片段来解决西伯利亚ibex Capra sibirica整个范围的物种形成。。我们证明了西伯利亚高地山羊是一种多型物种，可能是由至少2种和/或3至4个亚种的组合形成的。贝叶斯系统发育表明，根据平均种内距离标准，印度-塔吉克斯坦（IT）进化枝与其他进化枝有足够的差异，因此有必要将其识别为不同的物种。我们为支持IT进化枝作为西伯利亚ibex的独特物种提供了务实的证据，并敦促在全球和区域范围内优先保护该物种。