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Inferred ages and 95% credibility intervals for the Coleoptera clade (top panel) or a Coleoptera + Strepsiptera clade (bottom panel) based on the molecular clock analyses of amino acid sequence data of sperm individualization genes. The full overlap of age estimates of monophyletic Coleoptera identifies an interval (shaded area) consistent with the proposed age of the group based on fossil data and used here as age prior for the evolutionary rate analyses in beetles.
