Time-scaled Bayesian Maximum Clade Credibility tree of HBV/F full length genome sequences calibrated with the substitution rate of 1.0 × 10-5s/s/y. The branches are colored according to the most probable location of their parental node (see the color legend in the figure). The numbers on the internal nodes represent posterior probabilities (pp), and the branch lengths of the tree correspond to length of time (see the time scale bar at the bottom of the tree). The symbol “▲” indicates the nodes corresponding to the posterior root state probability (PRSP) values reported for HBV/F1b-BR, HBV/F2a-BR and HBV/F4-BR (0.91, 0.75, and 0.99, respectively). The two Brazilian HBV/F complete genome sequences previously available in GenBank are identified with *.