Although Hepialus xiaojinensis is important as the host of Ophiocordyceps sinensis, it remains poorly known especially in genetic structure and phylogeny status. To get a better understanding of it, the complete mitochondrial genome sequence of H. xiaojinensis was sequenced for the first time. The genome was 15 397 bp in size and contained 13 protein-coding genes, 2 rRNA genes, 22 tRNA genes, and an AT-rich region, and the gene composition and the arrangement of which were consistent with other insects of Hepialidae. The base composition of the genome was A (41.44%), T (39.68%), C (11.52%), and G (7.36%), with an AT content of 81.13%. Moreover, we have performed phylogenetic analysis of H. xiaojinensis and other 11 Lepidoptera species.
Keywords: AT-rich region; Hepialus xiaojinensis; mitogenome; phylogenetic tree.