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Abstract
The complete mitochondrial DNA sequence of Triplophysa venusta was determined using a PCR-based method in our present study. The genome is totally 16 574 bp in length and contains 13 protein-coding genes, 2 ribosomal RNA, 22 transfer RNA genes, and 1 non-coding control region. The overall base composition of T. venusta is A 27.8%, T 26.9%, C 26.9%, and G 18.4%, with an A + T bias of 54.7%. This complete mitogenome of T. venusta provides a basic data for studies on species identification, molecular systematics, and conservation genetics. The phylogenetic trees consistently showed that the Family Cobitidae was divided into three major clades: the subfamily Botiidae, the subfamily Nemaeheilidae, and the subfamily Cobitinae. Cobitinae and Nomaeheilidae formed a main Loach clade, with Botiidae clustered at the basal.