Phylogenetic tree based on the SSU rDNA sequences of ciliates. The ML tree was implemented by MEGA6 using the Tamura 3-parameter model, and Bayesian Inference by Mrbayes 3.2 with the GTR + G + I model. Two Plasmodium spp. were used as outgroups. The scale bar corresponds to 0.02 expected substitutions per site. The sequence extracted from the present transcriptome is in red script with yellow shading.