Figure 5 in Mitogenomic phylogeny and fossil-calibrated mutation rates for all F- and M-type mtDNA genes of the largest freshwater mussel family, the Unionidae (Bivalvia)

Figure 5. Fossil-calibrated ultrametric chronogram of the Unionidae calculated under a lognormal relaxed clock model and a Yule process speciation implemented in BEAST v.1.10.1 and obtained for the complete F-type mitogenome data set. The newly sequenced tribe-level taxa are coloured red. An outgroup sample (Margaritiferidae) has been removed for better visualization (but see original BEAST tree in Supporting Information, Fig. S1A). Bars indicate 95% confidence intervals of the estimated divergence times between lineages (Mya). Black numbers near nodes are mean ages (Mya). Colour labels indicate the F-mtDNA gene order (UF1, UF2, and UF3). Stratigraphic chart according to the International Commission on Stratigraphy v.2018/08 (www.stratigraphy.org). Abbreviations: J, Jurassic; K, Cretaceous; N, Neogene; Pg, Palaeogene; Q, Quaternary.