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Fig. 2 | BMC Evolutionary Biology

Fig. 2

From: Comparative morphology of the postpharyngeal gland in the Philanthinae (Hymenoptera, Crabronidae) and the evolution of an antimicrobial brood protection mechanism

Fig. 2

Proportion of unsaturated hydrocarbons on provisioned and control bees. Arcsine-transformed proportion (+ standard deviation, SD) of unsaturated hydrocarbons (HCs) in extracts of provisioned bees (N = 6) taken from P. gibbosus brood cells and control bees (N = 9) which had no contact to the beewolves; closed circles show individual data points (open circle indicates outlier). Asterisk indicates a significance level of p < 0.05 according to a t test (including outlier)

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