Figure 6. Analyses of the cytochrome c oxidase subunit I haplotypes of Camponotus renggeri (yellow) and Camponotus rufipes (red). A, neighbour-joining tree constructed with Kimura two-parameter distances between C. renggeri and C. rufipes with bootstrap support values based on 10 000 replications indicated on each branch. B, median-joining network amongst the obtained haplotypes. Values on the branches represent the numbers of mutational steps distinguishing the haplotypes, represented as circles whose areas are proportional to the number of individuals with that haplotype.