Chrysandrena Hedicke, 1933

Wood, Thomas James, 2023, Revisions to the Andrena fauna of north-western Africa with a focus on Morocco (Hymenoptera: Andrenidae), European Journal of Taxonomy 916 (1), pp. 1-85 : 5

Subgenus Chrysandrena Hedicke, 1933

Members of the subgenus Chrysandrena are principally separated from the subgenus Euandrena Hedicke, 1933 in the female sex by the presence of plumose scopal hairs, since all known Chrysandrena species are specialists of Asteraceae , with Asteraceae-specialised bees often displaying dense, finely plumose, or branched scopal hairs (e.g., Linsley 1958; Linsley & MacSwain 1958; Moldenke 1979; pers. obs. for the genus Andrena ), whereas Euandrena are not (either polylectic or specialists on other botanical families). The statuses of these two subgenera were recently confirmed as reciprocally monophyletic in the Old World ( Pisanty et al. 2022b). This result was also found with a simple COI analysis ( Fig. 2 ). The placement of A. testaceipes is also notable, as it was previously included in the subgenus Margandrena Warncke, 1968 . The confusion surrounding its placement is discussed below in the new synonymies section; it can now be confidently placed in Chrysandrena based on morphology and this genetic result.

Figures

Fig. 2. Phylogenetic tree (maximum likelihood) of Andrena subgenera Chrysandrena Hedicke, 1933 and Euandrena Hedicke, 1933 based on the mitochondrial COI gene. Numbers adjacent to branches represent bootstrap support (values of <75 are omitted).