Fig. 6From: Molecular phylogeny and timing of diversification in Alpine Rhithrogena (Ephemeroptera: Heptageniidae)Coalescent-based chronogram (*BEAST maximum clade credibility tree) of the alpestris species group extracted from the global five-gene species tree, with ancestral altitudes reconstructed using the REML method. The altitudes and the color gradient are indicated as in Fig. 5 Back to article page