Figure 4. Co-evolutionary relationships of simian foamy virus (SFV) polymerase (pol) (green branches and text) and primate cytochrome B (cytB) (brown branches and text) Bayesian-inferred phylogenetic trees based on reconciliation analysis.

One of nine potentially optimal reconciled trees with 12 cospeciations (black circles), three host switches (blue arrows with dashed lines), 1 duplication (black square), and 15 sorting events (truncated branches without corresponding taxa).