Leptopharynx brasiliensis from life (9–12) and after protargol impregnation (13). 9, 10. Right side view at two focal planes. Note, inter alia, the enormous oral basket, the distinctly oblique and serrated preoral region, the cortical ridges right of kineties 2 and 3, the margin of a hyaline plate on the ventral side (9), and the countless lipid droplets in the cytoplasm (10). 11, 12. Left side view showing the furrows containing kinety 6 and the middle portion of kinety 7. Note the thick, exploded extrusome (arrowheads), shown at higher magnification in (12). Arrows denote the rod-shaped arms. 13. Right side view of oral region. Note the enormous oral basket, the widely spaced kinetids of kinety 1, the group A–C basal bodies, and the upper part of the oral primordium. A, group A basal bodies; B, group B granules; C, group C basal bodies; CL, cilium; CV, contractile vacuole; CY, cytopyge; E, extrusomes; F, furrows; K1–8, somatic kineties; LD, lipid droplets; M(1–3), adoral membranelles; MA, macronucleus; MC, membranellar cilia; NK, nasse kinetosomes; OB, oral basket; OP, oral primordium; P, margin of a hyaline plate; PC, postoral complex; PO, preoral kineties; R, cortical ridges. Scale bars 20 μm (9, 10, 12), 25 μm (11), and 10 μm (13).