Figure 7
Transmission electron micrographs (TEM) of non-consecutive serial sections through the anterior part of the nucleus of Bihospites bacati n. gen. et sp. Figures 7A-F are presented from anterior to posterior. A. TEM showing the nucleus (N) and the accessory rod (ar) surrounded by electron-dense material (Images are viewed from the anterior side of the cell: D, dorsal; L, left side of the cell; R, right side of the cell; V, ventral). B-C. TEMs showing the main rod (r) near the striated fibres (SF) of the accessory rod (arrow). D. TEM showing the left side of the nucleus (N) appearing behind the rod (r) and accessory rod (ar). The white arrow shows the presence of bacteria near the rod. E. TEMs showing the main rod (r) and the accessory rod (arrowheads) on the dorsal and ventral sides of the nucleus. F. Transverse TEM at the level of the vestibulum showing the disappearance of the ventral side of the main rod (r) and the drastic reduction of the accessory rod (arrowhead). Note the indentations in the nucleus for accommodating the main rod and accessory rod (A bar = 500 nm; B-F bar = 2 μm).