This feeding pocket merged together with the flagellar pocket and formed a common subapical concavity in the cell or a “”vestibulum”" (Figure 2B, 5, 9A). A novel “”cytostomal funnel”" was positioned at the junction, and therefore demarcated the boundary, between the feeding pocket and the flagellar pocket (Figure 5, 6, 9A). The cytostomal funnel was an anterior extension of the posterior end of the accessory rod that eventually opened within the subapical
vestibulum (Figure 2B, 5, 6 and 9A). Some microtubules associated with the posterior end of the accessory rod also extended toward the ventral side of the cell and appeared to become continuous with the (ventral flagellar root) microtubules Ruxolitinib solubility dmso that reinforced the PF-02341066 in vivo flagellar pocket (not shown). Figure 9 Diagrams showing a reconstruction of the
ultrastructure of Bihospites bacati n. gen. et sp. Relationships between C-shaped rod apparatus, nucleus, cytostomal funnel, feeding pocket, flagellar pocket and vestibulum, as inferred from serial transmission electron microscopy (TEM), scanning electron microscopy (SEM), and light microscopy (LM). A. Cell viewed from the right side showing the positions of the nucleus (N), the C-shaped main rod (r), the accessory rod (ar), and the cytostomal funnel (cyt) in relation to the feeding pocket (FeP), the flagellar pocket (FP) and the vestibulum (vt); Vf = ventral flagellum; Df = dorsal flagellum; Db = dorsal basal body; Vb = ventral basal body. B. Diagram emphasizing the relationship between nucleus (N), main rod (r), and folded accessory rod (ar). The diagram is divided into three sections; and the nucleus removed from the top section for clarity. Posterior end of the main rod positioned at the
level of the vestibulum on the ventral side of the nucleus. This rod extends posteriorly and then encircles the posterior, dorsal and anterior ends of the nucleus before terminating on the ventral side of the nucleus just above the vestibulum; therefore, this rod is C-shaped. The folded accessory rod runs along the C-shaped oxyclozanide main rod for most of its length, terminating at the same point just above the vestibulum; however, on the ventral side of the nucleus, the posterior end of the accessory rod extends both anteriorly, defining the cytostomal funnel (cyt), and ventrally toward the ventral basal body. The posterior region of the feeding pocket also contained a “”congregated globular structure”" (CGS) that was associated with the posterior end of the main rod (Figure 6A-B). The posterior end of the folded accessory rod became more robust as the serial sections moved from the posterior end of the feeding pocket toward the posterior end of the cell (Figure 6, 9).