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A. main figure: purple bars are 95%HPD of node age estimates. D. variabilis calibration = (1.3 my SD = 0.15), D. jacobus calibration = (1.9 my, SD = 0.15); B. Inset: figure is a closeup of the ingroup, showing the disparity in branch lengths among Clade 1 and Clade 2; C. Inset: a comparison of branch length distributions between Clade 1 and Clade 2.
