Yang, C., Liu, A., Xu, Y., Xu, Y., Fan, X., Al-Farraj, S.A., Ni, B. & Gu, F. (2015) Phylogenetic positions of four hypotrichous ciliates (Protista, Ciliophora) based on SSU rRNA gene, with notes on their morphological characters . Zootaxa, 4000 (4), 451–463.