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Title: $The complete mitochondrial genome sequence of <i>Triplophysa xiangxiensis</i> (Teleostei: Nemacheilidae)
Abstract: AbstractThe complete mitochondrial genome of the typical cave-dwelling nemacheilid loach species, Triplophysa xiangxiensis, was sequenced. The mitogenome of this blind fish, with 16 598 bp in length, composed of 13 protein-coding, 2 rRNA and 22 tRNA genes, and 2 non-coding regions (D-loop and OL). Its phylogenetic position within the Nemacheilidae was estimated. Phylogenetic tree inferred based on the complete mitogenome indicated that T. xiangxiensis was sister to T. rosa; both clustered with all other analyzed congeneric species to form the sister group of sampled species of Barbatula. The pairwise genetic distance between these two blind species was much lower than those between both and all other congeneric species. A further study on the taxonomic status of both within Triplophysa or the Nemacheilidae is warranted.Keywords: Blind cavefishmitochondrial genomeTriplophysa xiangxiensis AcknowledgementsOur sincere thanks are given to Ying Wang and Rui-Xia Xie for their technical assistance in molecular analysis, and to Sheng-Jie Ren and Zhong-Guan Jiang for helping with field work.Declaration of interestThe authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper. This study was supported by the grants from the Special Foundation of the Ministry of Science and Technology of the People's Republic of China (2014FY110100).