The complete mitochondrial genome of the Hainan Island Shrew, <i>Crocidura wuchihensis</i>

The Hainan Island Shrew <i>Crocidura wuchihensis</i> is a small-bodied insectivore species belonging to the Soricidae family. In this study, we determined its the complete mitochondrial genome. The whole mitochondrial genome was found to be 17,253 bp in length and comprises 13 protein-coding genes, 22 tRNAs, 2 rRNAs and a control region. The base composition of the <i>C. wuchihensis</i> total mitogenome as follows: A, 32.8%; G, 13.0%; T, 32.1%; and C, 22.1%, with an A + T content of 64.9%. Notably, a tandem repeat sequence (5′-CAC ACG TGT ACA-3′) was identified in the control region with 24 copy numbers. Additionally, phylogenetic analysis indicated that <i>C. wuchihensis</i> is closely related to <i>Crocidura tanakae</i> and <i>Crocidura dongyangjiangensis</i> based on the concatenated sequences of the 13 protein-coding genes. The characterization of the shrew’s mitogenome will provide the foundation for its use in population genomics and systematic studies of Soricidae.五指山麝鼩（*Crocidura wuchihensis*）是隶属于麝鼩科（Soricidae）的小型食虫动物。本研究测定了其完整线粒体基因组。该线粒体基因组全长17253 bp，包含13个蛋白质编码基因、22个转运RNA（transfer RNA, tRNA）基因、2个核糖体RNA（ribosomal RNA, rRNA）基因以及1个控制区。五指山麝鼩线粒体全基因组的碱基组成如下：腺嘌呤（A）占32.8%、鸟嘌呤（G）占13.0%、胸腺嘧啶（T）占32.1%、胞嘧啶（C）占22.1%，A+T总含量为64.9%。值得注意的是，研究人员在其控制区中发现了一段拷贝数为24的串联重复序列（5′-CAC ACG TGT ACA-3′）。此外，基于13个蛋白质编码基因的串联序列开展的系统发育分析显示，五指山麝鼩与台湾麝鼩（*Crocidura tanakae*）、东阳江麝鼩（*Crocidura dongyangjiangensis*）亲缘关系密切。该麝鼩线粒体基因组的解析将为麝鼩科的种群基因组学与系统学研究奠定基础。