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. 2011 Dec 8;6(12):e28161. doi: 10.1371/journal.pone.0028161

Figure 4. Divergence time chronogram focusing on Parmeliaceae.

Figure 4

The chronogram was estimated as described in the legend for figure 3. Two calibration points based on fossil assignation are marked as C2 (crown node of Parmelia) and C3 (crown node of Alectoria). C3* is the alternative calibration with the Alectoria fossil assigned to the alectorioid crown. The Parmelioid group is highlighted by the grey box. Numbers inside circles refer to divergence nodes between the main clades. Grey bars show the 95% highest posterior density intervals (HPD). Detailed ages are given in Table 2.