Median-joining network of Rattus tanezumi cytochrome b (cyt b ) haplotypes based on partial (1077 bp) gene sequences. Haplotype colour coding is consistent with that used in Figure 1, viz. Yellow = south Africa (This study), Grey = Outside Africa (Genbank). Each of the mutational steps separating haplotypes is indicated in blue and corresponds to the relevant position in the cyt b gene, whilst black nodes correspond to median vectors. Haplotype numbers are the same as those provided in Table 1. Additional haplotype numbers correspond to the laboratory numbers assigned in the Pagès et al.  study.