Table 2 Summary of Bayes factor tests showing the effect of changing substitution model components. Entries are twice the log of the Bayes factor in the comparison between models M1 and M2 (2logB12). The row models are arbitrarily labeled M1; thus, positive values indicate support for the column model over the row model. A dash (-) indicates which partitions that have linked topology parameters. Asterisks (*) indicate models where the rates are assumed to be equal.