The external morphological, X-ray, and tomographic study of a frozen rodent mummy from the Upper Pleistocene Yedoma deposits on the Tirekhtyakh River (a Semyuelyakh River tributary, Abyi ulus, Republic of Sakha (Yakutia), Russia) showed its belonging to Lemmus sp. The radiocarbon age of the finding is 41 305-41 885 cal B.P. This is the first Pleistocene discovery of a frozen mummy of a genus Lemmus representative. In terms of the body and skull sizes, coat color, the lower incisor length, and the molar structure, the specimen studied is similar to the recent Lemmus sibiricus (Kerr, 1792). Comparison of the mitochondrial COB gene sequence with the DNA sequences presented in the GenBank database also testified to the maximum similarity with the Recent Siberian brown lemming.

中文翻译：

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在雅库特的上更新世发现一只冰冻的木乃伊（啮齿类，C科、,科）的木乃伊。

外部轮胎的形态学，X射线和断层扫描研究表明，来自俄罗斯提哈克河（俄罗斯萨哈共和国阿比乌鲁斯的Semyuelyakh河支流）上更新世Yedoma矿床的冷冻啮齿动物木乃伊属于Lemmus sp。 。该发现的放射性碳年龄为41 305-41 885 cal BP。这是首次更新世的发现是莱姆斯属的冷冻木乃伊。在身体和颅骨的大小，毛色，下门齿长度和臼齿结构方面，所研究的标本与最近的Lemmus sibiricus（Kerr，1792）相似。线粒体COB基因序列与GenBank数据库中显示的DNA序列的比较也证明与最近的西伯利亚棕鼠有最大的相似性。