The complete mitogenome of the wood-feeding cockroach <i>Cryptocercus kyebangensis</i> (Blattodea: Cryptocercidae) and phylogenetic relations among cockroach families

<div><p>The complete mitogenome of the subsocial wood-eating cockroach <i>Cryptocercus kyebangensis</i> was sequenced and compared with that of another Asian cockroach, <i>Cryptocercus relictus</i> and the primitive termite <i>Mastotermes darwiniensis</i>. The complete mitogenome of <i>C. kyebangensis</i> is a closed circular molecule of 15,720 bp, containing13 protein-coding genes, two ribosomal RNA genes (12S rRNA and 16S rRNA), 22 transfer RNA genes, and one D-loop region. Nucleotide composition of the <i>C. kyebangensis</i> mitogenome shows an AT bias (74.4%), in particular, 46.0% A, 28.4% T, 9.7% G, and 15.9% C. GC skews are similar among the mitogenomes of <i>C. kyebangensis</i>, <i>C. relictus</i>, and <i>M. darwiniensis</i>, but AT skew is stronger in <i>Cryptocercus</i> mitogenomes than in the <i>M. darwiniensis</i> mitogenome. The whole mitogenome of <i>C. kyebangensis</i> showed 88.8% nucleotide similarity to that of <i>C. relictus</i> but only 74.9% similarity to that of <i>M. darwiniensis</i>. Phylogenetic analyses, based on amino acid sequences of the 13 mitochondrial proteins, showed that the <i>Cryptocercus</i> clade has a sister relation with termites, including the primitive termite <i>M. darwiniensis</i>. Sister relations of Blattidae and Blattellidae, with the clade Cryptocercidae + Isoptera as a sister group, are also evident. Polyphagidae (<i>Eupolyphaga sinensis</i>) appears to be most basal in the phylogenetic trees, showing sister relations with the remaining cockroaches.</p>