Fig. 4

Topologies from analyses of datasets under homogeneous models (BI-PCG12-codon partition, BI-PCG13RY, ML-PCG12-codon partition and ML-PCG13RY). Partitioning schemes and models are listed in Additional file 10. Values at nodes represent BPP and ML support values. Asterisks above branches indicate that BPP or ML support values are 1 or 100. A dash is shown if topology is not shown in BI-PCG12-codon partition. Scale bar represents number of expected substitutions per site. Histogram at right is posterior predictive analyses of compositional homogeneity. Z-score > 2 indicates taxa were significantly compositionally heterogeneous