Bayesian inference (BI) method-based phylogenetic tree for order Odonata obtained using concatenated sequences of 13 PCGs and 2 rRNAs. The numbers at each node indicate Bayesian posterior probabilities (BPP). The scale bar indicates the number of substitutions per site. Two species belonging to order Ephemeroptera were used as outgroups. GenBank accession numbers are as follows: B. contaminata, KM658172 (Yu et al. 2016); H. croceus, KM244659 (Tang et al. 2014); N. pygmaea, KY402222 (Jeong et al. 2017); O. chrysis, KU361233 (Yong et al. 2016); O. glaucum, KU361232 (Yong et al. 2016); O. Sabina, KU361234 (Yong et al. 2016); O. testaceum, KU361235 (Yong et al. 2016); Ictinogomphus sp., KM244673 (Tang et al. 2014); D. lunatus, EU591677 (Lee et al. 2009); A. imperator, KX161841 (Herzog et al. 2016); P. mirabilis, FJ606784 (unpublished); E. formosa, HM126547 (Lin et al. 2010); E. ornata, KF718295 (unpublished); E. decorata, KF718294 (unpublished); E. yayeyamana, KF718293 (unpublished); V. melania, JX050224 (Chen et al. 2015); A. atrata, KP233805 (unpublished); M. costalis, KU871065 (Lorenzo-Carballa et al. 2016); I. pumilio, KC878732 (Lorenzo-Carballa et al. 2014); I. elegans, KU958378 (Feindt et al. 2016a); P. foliacea, KP233804 (unpublished); M. caerulatus, KU958377 (Feindt et al. 2016b); E. superstes, JX050223 (Wang et al. 2015); E. orientalis, EU591678 (Lee et al. 2009); and I. ignota, HM143892 (unpublished).