The dark-spotted frog (Pelophylax nigromaculatus) belongs to Ranidae. This species is known from the Russian Far East, central, northern and north-eastern China, the Democratic People's Republic of Korea, the Republic of Korea, and Japan. In this study, the complete mitochondrial genome of P. nigromaculatus was sequenced. The mitogenome was 17 567 bp in length, consisting of 13 protein-coding genes, 22 transfer RNA (tRNA) genes, 2 ribosomal RNA (rRNA) genes, and a non-coding control region. As in other vertebrates, most mitochondrial genes are encoded on the heavy strand, except for ND6 and eight tRNA genes which are encoded on the light strand. The overall base composition of the P. nigromaculatus is 29.2% A, 27.4% T, 28.4% C, and 15.0% G. Phylogenetic analysis showed P. nigromaculatus was closely related to P. plancyi and P. chosenicus. The complete mitogenome of P. nigromaculatus can provide important data for the studies on phylogenetic relationship and population genetics to further explore the taxonomic status of this species.
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