Figure 2

Split support spectrum for the data used in Fig. 1. Each column represents the number of sequence positions (indicated by the height of the column) that provide support for a given split, showing how many positions have conserved character states for each partition of a split (above and below the horizontal axis). Splits are sorted according to column height. Blue columns represent splits that are not compatible with a binary topology constructed with the strongest and further compatible splits. The four strongest splits at the left of the spectrum are the same seen in Fig 1. The right tail of the spectrum consists of random combinations of taxa.