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. 2021 Oct 20;12:743920. doi: 10.3389/fmicb.2021.743920

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Copyright © 2021 Liang, Wang, Dong, Mukhtar, Wang 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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Protocruzia marianaensis sp. n. in vivo (A,B,E–H), after protargol impregnation (C,D,I–L). (A,E–H) Right lateral view of a representative individual. (A,G) Note the longitudinal furrows with the ciliary rows (arrows). (B) Macronucleus view. (F) Endoplasm of a squeezed cell; arrow points to a food vacuole. (H) Left lateral view shows the cortical granules (arrow). (C,D,I–L) Right (C,I,K) and left (D,J,L) lateral view of the holotype specimen, showing the ciliary pattern. Arrows in (C,I) mark postoral dikinetids. (I) Right anterior cell portion. Arrowheads point to adoral membranelles, the double arrow points to the paroral membrane, and the double arrowheads denote a dikinetid bearing two cilia. (J) Left anterior cell portion. The arrow denotes a monokinetid bearing two cilia. AM, adoral membranelles; MA, macronucleus; PM, paroral membrane; SK, somatic kinety; Scale bars = 5 μm.