Figure 4From: Phylogeography and Demographic History of Chinese Black-Spotted Frog Populations (Pelophylax nigromaculata): Evidence for Independent Refugia Expansion and Secondary ContactNested-clade design on Cyt b haplotype parsimony network of P. nigromaculata clade B. Each line represents a single mutational change, irrespective of length. Black circles represent unsampled or extinct haplotypes. Numbers in italic identify clade-groups on each nesting level.Back to article page