Maximum likelihood tree of the Hexamitinae-enteromonad clade based on SSU rRNA genes (GTR + Γ + I), rooted as per Figure 1. Statistical support – ML bootstraps/RELL bootstraps/ML distance bootstraps/Bayesian posterior probability. Isolate PYX was identical in sequence with isolate PSEUD. Isolate PYX was therefore not included in the analysis but added to the tree by hand. Bootstrap support values <50% and posterior probabilities <0.7 are depicted by asterisks, or not shown.