Figure 4. Median-joining haplotype network based on mitochondrial gene COI. The four ellipses represent four clades in Figure 3, respectively. Each circle represents a haplotype, the area of the circle is proportional to the frequency of haplotypes, and black dots represent hypothetical unobserved haplotypes. Different populations are shown in different colors.

Published as part of Zhang, Hecai, Hu, Tiange, Shi, Changying, Chen, Guangwen & Liu, Dezeng, 2021, Genetic diversity, population structure and demographic history of Dugesia japonica in Taihang Mountains, pp. 153-162 in Zoological Systematics 46 (2) on page 159, DOI: 10.11865/zs.2021202, http://zenodo.org/record/5365381