Figure 9 in The search finds an end: the morphologically chimeric hysterocinetids belong to the subclass Hymenostomatia (Ciliophora: Oligohymenophorea)

Figure 9. Phylogenetic tree based on the nuclear 18S and 28S rRNA gene sequences, showing the phylogenetic position of hysterocinetids within the class Oligohymenophorea. The subclass Peniculia was used as an outgroup, following Gao et al. (2016). Posterior probabilities for Bayesian inference conducted in MrBayes and bootstrap values for maximum likelihood conducted in IQ-Tree were mapped onto the 50%-majority rule Bayesian consensus tree. Fully statistically supported nodes are marked with red solid circles. The scale bar denotes one substitution per ten nucleotide positions.