The complete mitogenome of Smith’s shrew (Chodsigoa smithii)

Abstract

The Smith’s shrew (Chodsigoa smithii) belongs to subfamily Soricinae, which is an endemic shrew to China. In this study, we obtained the complete mitochondrial genome of the C. smithii. This mitogenome is a circular molecule with 17,108 bp in length, containing 13 protein-coding genes, 22 transfer RNA genes, two ribosome RNA genes, one light strand replication origin (OL), one non-coding region, and with a base composition of 32.5% A, 29.3% T, 24.8% C, and 13.4% G. The nucleotide sequence data of 13 protein-coding genes of C. smithii and other 19 Soricomorpha species were used for phylogenetic analyses. Phylogenetic tree shows that Soricinae includes two major phylogenetic lineages. Chodsigoa smithii is located as a basal position in tribe Nectogalini.

Keywords

• soricomorpha
• phylogenetic analysis
• evolution