The complete mitochondrial genome of Butis koilomatodon (Bleeker, 1849) (Gobiiformes: Butidae) and its phylogenetic analysis.

Butis koilomatodon (Bleeker, 1849) is common in China, belongs to the family Butidae within the order Gobiiformes. The complete mitochondrial genome of B. koilomatodon was sequenced and characterized for the first time. The circular genome is 16,521 bp in length, comprising 13 protein-coding genes, 22 transfer RNA genes, two ribosomal RNA genes and one control region. The phylogenetic reconstruction based on the mitochondrial genome sequences revealed B. koilomatodon as sister to Butis melanostigma. This study could be beneficial for systematic studies on family Butidae.