Fig. 20 in The genus Andrena in Belgium: revisions, clarifications, and a key for their identification (Hymenoptera: Andrenidae)

Fig. 20. Phylogenetic tree (neighbour joining) of Andrena subgenera Melanapis, Suandrena, and Plastandrena based on the mitochondrial COI gene with A. relata Warncke, 1975 as an outgroup. Numbers adjacent to branches represent posterior probabilities (values of <0.5 are omitted). All members of the pilipes/nigrospina complex are labelled as 'pilipes', with the date of capture indicated. Specimens captured from March-August correspond to the bivoltine taxon A. pilipes Fabricius, 1781 and those captured in the middle of the season (May, June, early July) correspond to the univoltine taxon A. nigrospina Thomson, 1872.