Summary tree showing relationships among major lineages obtained by a maximum likelihood (ML) partitioned analysis of the concatenated dataset. A series of three numbers (e.g., 1/100/87) at each of the main nodes represents the posterior probability for that split obtained in Bayesian analysis (B), percentage of bootstrap support obtained by ML, and percentage of bootstrap support obtained by MP analysis, respectively (1000 bootstrap replicates). Dashes represent values lower than 0.5 (B) or 50% (ML, MP). Nodes not supported by values higher than 0.5 (B) or 50% (ML, MP) were collapsed. Asterisks represent nodes that were not obtained by B or MP analyses. Clades labelled with numbers within ovals are discussed in the text and shown in subsequent figures.