Figure 4. Statistical haplotype networks for COI, 16S in Old lake versus young taxa: a comparative phylogeographic perspective on the evolution of Caspian Sea gastropods (Neritidae: Theodoxus )

Figure 4. Statistical haplotype networks for COI, 16S and ATPα sequence data for Pontocaspian and southern Iranian Theodoxus groups. The total number of sequences in each network is demarcated by 'n'. The circle sizes represent the relative frequency of sequences per haplotype. The number of site changes separating haplotypes is indicated by blank dots. Colours correspond to the sampling locations, as indicated in the key and in figure 2. Haplotype groupings are boxed and labelled according to the phylogroups determined through the dated phylogeny (I–VI; figure 3).