The mandible shape of the common vole semi-species from the hybrid zone was studied for the first time using the methods of geometric morphometry. The hybrid specimens were found to display high morphological variability being closer to the parental Microtus obscurus than to M. arvalis form. The main trends of changes in the mandible shape were primarily observed in the horizontal plane.

中文翻译：

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杂种区常见田鼠田鼠（Rodentia，Arvicolidae）半物种下颌骨形态的形态变异。

首次利用几何形态学方法研究了杂种区常见田鼠的下颌骨形状。发现杂种标本显示出较高的形态变异性，与亲本暗纹天蛾相比，更接近于室脉分枝杆菌形式。下颌骨形状变化的主要趋势主要是在水平面观察到的。