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. 2021 Jan 5;11:574285. doi: 10.3389/fmicb.2020.574285

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Copyright © 2021 Mukhtar, Wu, Wei, Chen, Cheng, Liang and Chen.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The phylogenetic position of species within the genus Spirostomum. The topology of the tree is inferred from SSU sequences using the Maximum likelihood (ML) method according to the similarity of sequences, and the results were obtained with “one click” option in the server http://www.phylogeny.fr. Obtained SSU rDNA sequences from (■) S. ambiguum (MT640275), (▲) S. subtilis (MT640276), and (◆) S. teres (MT640277) in this study are positioned within their expected clade according to literature (Chi et al., 2020).