Figure 1.

Sampling sites and mitochondrial haplotype distributions of P. nigromaculata populations. The numbers indicate local populations (see Table 1 for details). KR and JP stand for haplotypes from Korea and Japan, respectively. Lower case letters "a" to "d" indicate distinct but geographically proximate locales within the Dongliao area.

Zhang et al. BMC Evolutionary Biology 2008 8:21   doi:10.1186/1471-2148-8-21
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