Figure 8 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 8 ML phylogenetic tree of P.litoralis based on the mitochondrial COI gene (658 bp) with Pontodriluslongissimus as the outgroup. Only bootstrap values >70% are indicated at each node. Scale bar represents the number of nucleotide substitutions per site. The sample names correspond to those in Table 5. Photograph on the top left shows comparative size of the shortest and the longest samples in this molecular study. The longest population (JP2) is shown in red and the shortest population (VT2) is shown in blue.