Figure 2
From: High mitochondrial DNA sequence diversity in the parthenogenetic earthworm Dendrobaena octaedra

Mismatch distributions: (top) showing a close match to expectations for a stable population with constant growth, observed for the total data set (shown) and most of the sample sites; (bottom) showing deviation from expectations characteristic of secondary contact as observed for the contaminated site in Imatra (similar results, not shown, were observed for the uncontaminated site in Imatra).