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. 2023 Apr 8;15(4):evad058. doi: 10.1093/gbe/evad058

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© The Author(s) 2023. Published by Oxford University Press on behalf of Society for Molecular Biology and Evolution.

This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (https://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Fig. 3. — Transmission electron micrographs of Agogonia voluta gen. et sp. nov. (A) Longitudinal sagittal section showing the general cell structure. (B) Right posterior edge of the groove with composite fiber with a striated appearance. (C) Longitudinal frontal section of the anterior part of a cell showing the orientation of basal bodies, dorsal fan, and singlet microtubular root. (D) Basal body of posterior flagellum. (E and F) Basal body of anterior flagellum and dorsal fan of microtubules with fan-associated sheet. (G) Oblique sections showing the left side of the cell with basal bodies, left root with associated “C” fiber, and dorsal fan of microtubules with fan-associated sheet. (H) Mitochondrion with sac-shaped cristae. (I and J) Two serial oblique sections showing the right side of the cell with the right root and associated fibers. (K) Cartwheel structure of the posterior basal body. (L) Posterior flagellum with dorsal and ventral vanes. (M and N) Two serial transversal sections showing the origin of roots with associated fibers. (O and P) Two serial transversal sections showing the orientation of roots at the level of posterior flagellum emergence. (Q) Transversal section showing the orientation of the roots at the level of the middle part of the cell. Scale bars: A: 1 µm; С–Q: 300 nm. Af – “A” fiber; AF = anterior flagellum; ax = axosome; b1 = basal body of the posterior flagellum; b2 = basal body of the anterior flagellum; Bf = “B” fiber; Cf = “C” fiber; cv = contractile vacuole; cw = cartwheel structure; dv = dorsal vane of the posterior flagellum; ga = Golgi apparatus; f = dorsal fan of microtubules; fa = fan-associated fiber; If = “I” fiber; m = mitochondrion; n = nucleus; PF = posterior flagellum; r1 = left root; r2 = right root; sa = singlet-root-associated fiber; sg = singlet root; sb = striated band connecting basal bodies; tp = transversal plate; vg = ventral groove; vv = ventral vane of the posterior flagellum.