Comparative analyses of the three complete mitochondrial genomes from forensic important beetle genus Dermestes with phylogenetic relationships

Necrophagous Dermestes species have high forensic importance in relation to the estimation of elapsed time since death or death season. To further supplement the genome-level features for related species, the complete mitochondrial genome (mitogenome) of Dermestes species D. essellatocollis, D. frischii and D. coarctatus are amplified, sequenced, annotated, analyzed, and compared with other twelve species of the infraorder Bostrichoidea. The mitochondrial genomes were typical circular molecules with 16,218, 15,873 and 15,873 bp in length, respectively. They included 13 protein coding genes, two rRNAs, and 22 tRNAs, as well as the putative control region. The gene orders and orientations are identical to those of other recorded bostrichiformian species and had the ancestral insect gene composition. Furthermore, phylogenetic analyses based on all the mitochondrial protein coding genes for 13 Bostrichoidea and 16 outgroup taxa were performed using Bayesian and Maximum Likelihood analyses. The inferred trees indicate that the genus Dermestes is monophyletic. The monophyly of infraorder Bostrichiformia is not supported. This study provides genomic data for mitochondrial genome library of the genus Dermestes to investigate evolutionary and systematic studies.