The mitochondrial genome of Chaeturichthys stigmatias provides novel insight into the interspecific difference with Amblychaeturichthys hexanema

Chaeturichthys stigmatias and Amblychaeturichthys hexanema belong to the family Gobiidae, which are offshore warm fish species and widely distribute in the western Pacific Ocean. In this study, the mitochondrial cytochrome c oxidase subunit I(COI) sequences and 12 S ribosomal RNA(12 S rRNA) sequences were used to analyze the interspecific differences between the two species. The phylogenetic analysis showed that the interspecific distance was significantly higher than the intraspecific genetic distance. The Neighbor-Joining tree showed two separate clusters, without sharing haplotype. The mitochondrial genome sequence of C. stigmatias was also reported. This genome was 17 134 bp in size, with a high A+T content of 55.9%. The phylogenetic analysis based on the tandem 13 coding protein genes nucleotide sequences indicated that C. stigmatias showed a close relationship with A. hexanema. This study can provide the basic genetic data for two species and will help for constructing the phylogeny of the Gobiiade.