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Neighbour-joining tree, K2P distance model, for Cotesia spp. from Canada and Alaska. The tree is cut in two sections to allow its display in a single page. The red square shows the complex of species related to Cotesia xylina and Cotesia yakutatensis (see explanation in the text, Checklist section). The number of specimens per species and its Sample IDs are detailed in the Supplementary Appendix 2.
