Figure 1. Mitogenome maps of Chironomus tepperi (A), Potthastia sp. (B), Rheocricotopus villiculus (C), Rheocricotopus villiculus (D), Prodiamesa olivacea (E), Clinotanypus yani (F).

The names of PCGs and rRNAs are indicated by standard abbreviations, while names of tRNAs are represented by a single letter abbreviation. The first circle shows the gene map and arrows indicate the orientation of gene transcription. Blue arrows refer to PCGs, purple arrows refer to rRNAs, red arrows refer to tRNAs and grey arrow refers to control region. The second circle shows the GC content, which is plotted as the deviation from the average GC content of the entire sequence. The third circle shows the GC-skew, which is plotted as the deviation from the average GC-skew of the entire sequence. The innermost circle shows the sequence length.