Figure 6 from: Seesamut T, Jirapatrasilp P, Chanabun R, Oba Y, Panha S (2019) Size variation and geographical distribution of the luminous earthworm Pontodrilus litoralis (Grube, 1855) (Clitellata, Megascolecidae) in Southeast Asia and Japan. ZooKeys 862: 23-43. https://doi.org/10.3897/zookeys.862.35727

Figure 6 Cluster analysis based on the Euclidean distances among the 14 populations of P.litoralis. Sampling sites codes are given in Table 1.