The complete mitochondrial genome characterization of Tridentiger obscurus (Gobiiformes: Gobiidae) and phylogenetic analyses of Gobionellinae

The dusky tripletooth goby, Tridentiger obscurus, is a good model organism for the small in size and reaching maturity within a single year. Previous studies mainly focused on the annual reproductive cycle, social behavior and life history, but little information is available of the mitochondrial genome and phylogenetic evolution of this gobioid fish. In this article, we described the complete mitogenome of T. obscurus and reconstructed the phylogenetic relationship of the relative species of Gobionellinae. The genome is 16,501 bp in length including 13 protein-coding, two ribosomal RNA, 22 transfer RNA genes, as well as a putative control region and an L-strand replication origin. The overall base composition is 28.1%, 27.0%, 28.0% and 16.9% for A, T, C and G, respectively. This result is expected for better understanding the systematic evolution of the genus Tridentiger and further phylogenetic study of Gobiiformes.