Mitochondrial genome of Heterotoma planicornis. Abbreviations of each gene were documented in Table 3. GC contents were indicated as a black circular graph, and GC-skew was indicated as green(+) or purple(-) in a circular graph. GC contents and GC skew were plotted as the deviation from the mean GC value of the full sequence. The innermost side of the circular graph shows sequence length, numerically marked with a 2 kbp interval. The circular map of the mitochondrial genome was visualized by the web server Proksee and annotated by MITOS2.