oxidase subunit I (COI) distribution of
from mainland Southeast Asia. The shapes of the symbols correspond to the defined clades in Figure 9. Black symbols are sequences from particular localities of the current study whereas gray symbols are sequences from GenBank (HN = Hunan, HS = Hoang Lien Son, QN = Quang Nam, GX = Guangxi, LC = Lao Cai, LD = Lam Dong, SH = Shan, VT = Vientiane, XK = Xiangkhouang). Gray solid line (Ithmus of Kra) and dashed lines (Kangar-Pattani Line) are the biota transition zones proposed in the peninsular. The arrows indicate the approximate localities of subspecific forms in the research area.