Fig. 2

Shown are two (tube-like) species trees with reconciled gene trees. The reconciliation map \(\mu\) for T and S is given implicitly by drawing the gene tree (upper right to the respective species tree) within the species tree. In the left example, the map \(\mu\) is unique. However, \(\mu\) is not time-consistent and thus, there is no time consistent reconciliation for T and S. In the example on the right hand side, \(\mu\) is time-consistent