Complete Mitochondrial Genome and Phylogenetic Position of <italic>Nurudea zhengii</italic> Ren (Insecta, Hemiptera, Aphididae)

<italic>Nurudea zhengii</italic> Ren was identified by aphid morphological characteristics as well as the gall shape and host plant species, and placed in the tribe Fordini (Hemiptera, Aphididae, Eriosomatinae). Here, its whole genome was firstly sequenced by a genome-skimming method and its mitochondrial genome (mitogenome) was assembled to examine its genetic variation and phylogenetic position. The complete mitogenome of <italic>Nurudea zhengii</italic> is 15,392 bp in length, and consists of 13 protein-coding genes, 22 tRNAs, two rRNAs and one D-loop region. The gene order follows the mitogenomes of the other <italic>Rhus</italic> gall aphids, and similarly has an AT bias with the content of 83.9%. The majority strand is A-skewed and C-skewed, and shows opposite skewness for G-skewed in the minority strands. The ratios of nonsynonymous to synonymous substitution rates of protein-coding genes are lower than one except for ATP8, which indicated that ATP8 was undergoing positive selection. Phylogenetic analysis among the <italic>Rhus</italic> gall aphids based on 13 protein-coding genes and two rRNA genes showed that <italic>N</italic>. <italic>zhengii</italic> was sister to <italic>N</italic>. <italic>shiraii</italic>, and then clustered with <italic>N</italic>. <italic>yanoniella</italic> as a group with high support value. The two species, <italic>N. shiraii</italic> and <italic>N</italic>. <italic>yanoniella</italic>, share the same host plant <italic>Rhus chinensis</italic>, while the host of <italic>N</italic>. <italic>zhengii</italic> is <italic>R</italic>. <italic>hypoleuca</italic>. However, the phylogenetic relationship indicated that the taxa sharing the same host plant were not absolutely clustered as the closest taxa at least at species level. [ABSTRACT FROM AUTHOR]