Figure 1.

SSU phylogeny of the Telonema-clade. Tree inferred with Bayesian inference by applying a covarion (G+I+COV) model of evolution. The numbers at the nodes represent Bayesian posterior probability and bootstrap values from distance analyses (G+I) above 50%. The undetermined lineage has previously been identified as phylotypes of uncertain taxonomic affiliation, and its grouping with the excavates may result from long-branch artefacts (Berney et al. 2004; Cavalier-Smith 2004a). For accession numbers of sequences used, see table S1 in electronic supplementary material.