Fig. 1.

Schematic distribution of identified internal transcribed spacers in the LSU rDNA of euglenozoans. The 5.8S and 28S rRNA gene structure has been shown for Diplonemea, Euglenida, two main clades of Kinetoplastea, and Heterolobosea as an outgroup. Additional ITSs have been numbered within euglenids (eITS) and kinetoplastids (kITS), with ITSs present in homologous positions marked (eITS10/kITS5, eITS11/kITS6 and eITS13/kITS7). On the left, phylogeny of Euglenozoa has been shown. For comparison, phylogeny presented in Kostygov et al. (2021) has been shown on the right. In both cases additional ITSs cannot be traced to the common ancestor, indicating their independent origin