Fig. 1From: Deeply divergent sympatric mitochondrial lineages of the earthworm Lumbricus rubellus are not reproductively isolatedHaplotype network of mtDNA (COI + ATP6) sequences of Lumbricus rubellus. The network shows the divergent mtDNA lineages (A1, A2, A3, C2, and E). Circles represent distinct haplotypes, which are marked with the labels H1-H27 in the enlarged insertions. The size of each circle is proportional to the total number of individuals that showed that haplotype, and the haplotype distributions within the populations are indicated as pie charts. The smallest circle corresponds to n = 1Back to article page