Abstract
Two mitochondrial genomes of the dynastine beetles, Oryctes rhinoceros (Linnaeus, 1758) and Eophileurus chinensis (Faldermann, 1835), were assembled via high-throughput sequencing (HTS). Each of the mitogenomes has 37 genes, showing standard gene order and annotation as the other insects, except for the transfer genes, presenting tQ-tI-tM order. To examine their phylogenetic positions, 118 public mitogenomes of Scarabaeidae were used to infer a ML tree. Overall, our scarabaeid phylogeny reveals clear relationships with high nodal supports, and the two rhinoceros beetles are both grouped with the subfamily Dynastinae. The feeding habit of the two clades seems to represent coprophagous and phytophagous types. However, polyphyletic relationships were observed in the subfamily Melolothinae and in the tribes of Onthophagini and Oniticellini. Further systematic revision is needed.
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