(A) Basins of attraction for the three topologies T1, T2, and T3. The gray area shows the region where the probability for tree T1 is largest. In the center c = (1/3, 1/3, 1/3) all trees are equally likely, at the points x12 = (1/2, 1/2, 0), x13 = (1/2, 0, 1/2), and x23 = (0, 1/2, 1/2) two trees have the same likelihood whereas the remaining one has probability zero. (B) The seven basins of attraction allowing not only fully resolved trees but also the star phylogeny and three regions where it is not possible to decide between two topologies. The dots indicate the corresponding seven attractors. A1, A2, A3 show the tree-like regions. A12, A13, A23represent the net-like regions and A∗ displays the star-like area.