Figure 3: Species tree for the Rhizoplaca melanophthalma species group inferred from a dataset comprised of loci ‘51’–‘100’ from the ‘100, 1 Kb’ dataset using the program *BEAST.

Species tree analyses of the ‘CEGMA’ and ‘100, 1 Kb’ datasets using ASTRAL-II and SVDquartets + PAUP* resulted in identical topologies with 100% support, with the exception of relationships among closely related taxa within the ‘porterii clade’. Internode certainty (IC) on each branch and the relative tree certainty (TCA), estimated from individual gene trees, are reported from ML analyses of ‘CEGMA’ and ‘100, 1 Kb loci’ datasets. The IC value of a given internode reflects its specific degree of incongruence; and the TCA values characterize the global degree of incongruence between trees.