Cortex organisation in <i>Siedleckia nematoides</i>.

<p><b>A.</b> Apical end of a parasite attached to the host enterocyte. Note the well-developed layer of glycocalyx. <b>B.</b> A detail of parasite apical end focusing on organisation of subpellicular microtubules. <b>C.</b> General view of parasite cross-sectioned in the anterior region. <b>D.</b> General view of a parasite cross-sectioned in the middle region. <b>E.</b> The cross-sectioned pellicle with well-preserved and adjacent cortical cytomembranes. <b>F.</b> Longitudinally-sectioned pellicle with obviously separated cortical cytomembranes. <b>G.</b> Cortex of parasite cross-sectioned in the middle region. <b>H.</b> Protoplasmic fracture face of the plasma membrane with pores. <b>I.</b> Fractured plasma membrane and cortical cytomembranes. A, C, G: RR TEM; B, D-F: TEM; H-I: FE TEM. <i>black arrowhead</i>–plasma membrane, <i>black asterisk</i>–rhoptry, <i>black circle</i>–pore, <i>double/paired black arrowhead</i>–IMC, <i>ei</i>–EF of the internal cytomembrane, <i>ep–</i>EF of the plasma membrane, <i>g</i>–glycocalyx, <i>h–</i>host tissue, <i>mi–</i>mitochondria, <i>mv</i>–mucronal vacuole, <i>n–</i>nucleus, <i>pe</i>–PF of the external cytomembrane, <i>pp</i>–PF of the plasma membrane, <i>white arrowhead</i>–subpellicular microtubule, <i>white arrows</i>–pores, <i>x—</i>micronemes.