Fig. 1

Map of sampling locations of Hemiculter leucisculus. Localities are detailed in Additional file 1: Table S1 and populations are presented as pie charts with slice sizes proportional to the frequency of the three lineages (see Fig. 2), as identified by phylogenetic analysis. Colors correspond to the lineages (purple, lineage A; red, lineage B; green, lineage C). Localities 15 and 27 are sample sites without exact orientation. H, Hainan island; J, Jiulongjiang River; L, Lingjiang River; M, Minjiang River; N, Nanpanjiang River; Q, Qiangtangjiang River