Characterization of the complete mitochondrial genome of (Gobiiformes: Gobiidae) and phylogenetic studies of Gobiiformes.

The environmental changes mainly caused by water pollution and human activities have dramatically threatened the survival of the small-scaled Wu's goby . In the present study, the complete mitogenome of was determined, which is 16,496 bp in length, containing 13 PCGs, two rRNA genes, 22 tRNA genes and a putative control region. The overall base composition is 28.6%, 29.0%, 26.7%, and 15.7% for A, T, C and G, respectively. The 13 PCGs encode 3,802 amino acids in total, twelve of which use the initiation codon ATG except , which uses GTG. In order to explore the systematic status of and further phylogenetic study of Gobiiformes, a maximum-likelihood tree was constructed based on the concatenated sequences of 12 PCGs. The result showed that , and clustered into a clade and then formed a sister-group with , suggesting the invalid former name of or .