Figure 6. Combined evidence estimate of the avian tree of life. A partitioned ML analysis was conducted using the *75,īPRGHOIRUWKHQXFOHRWLGHSDUWLWLRQDQG the &)1Yī model for the gap partition. Arrows indicate nodes defining supra-ordinal clades where bootstrap support increased or decreased by more than 10% relative to the nucleotide analysis (Figure 1). The combined evidence topology for Columbiformes was congruent with the gap topology instead of the nucleotide topology (inset; bootstrap values are reported for combined analysis [above branches] and for gap characters [below branches]).