Kinetom peculiarities of Sonderia vorax from silver nitrate impregnated specimens (A, B) and under fluorescent microscopy after FISH reaction (C, D). A. Ventral kinetom consists of two parts: the central ventro-frontal part, where kineties interrupt posteriorly (arrows), and the left ventro-lateral part consisting of continuous kineties (larger arrows). The border between the first and the second part at the left side of oral opening is indicated by the double arrowhead. B. Dorso-lateral kinetom. The striated band (arrow) reaches the last third of ciliate body. C. Ventral view of a cell after FISH (probe EUB338), highlighting the covering of ectosymbionts. D. Right part of ciliate ventro-lateral surface after FISH (probe EUB338) with numerous ectosymbiotic bacteria distributed along kineties. Arrow points at striated band uncovered by ectosymbiotic bacteria. Scale bars = 25 μm (A--C), 10 μm (D).