Multiple old differentiation centres around the Alps and complex range expansion patterns in a semi-aquatic insect: the phylogeny and biogeography of the Wormaldia occipitalis species complex (Trichoptera)

Heatmap presenting the pairwise genetic distances of the combined dataset of the Wormaldia occipitalis species complex, including one mitochondrial and two nuclear genes, with dendrogram. The colour codes of the genetic distances are shown in the legend. W. occ. occ. ‒ W. occipitalis occipitalis, W. occ. med. ‒ W. occipitalis meridionalis, W. occ. x sub. ‒ W. occipitalis x subterranea, W. sub. ‒ W. subterranea, W. sp. ‒ W. sp.