Complete mitochondrial genome and phylogenetic analysis of Sinocyclocheilus microphthalmus (Cypriniformes: Cyprinidae)

Sinocyclocheilus microphthalmus is endemic to Youjiang River and Hongshuihe River systems in Guangxi, Southwestern China. In this study, the complete mitochondrial genome of S. microphthalmus was sequenced. It was determined to be 16,589 bases. The overall base composition was 31.87% A, 24.96% T, 27.19% C, 15.99% G with 43.17% GC content. The nucleotide sequence data of 12 heavy-strand protein-coding genes of S. microphthalmus and other 13 Sinocyclocheilus species were used for phylogenetic analyses. Trees constructed using Bayesian inference showed a topology demonstrating that Sinocyclocheilus species clustered as one monophyletic clade with strong supports.