Figure 6

Pellicle architecture in Gregarina polymorpha gamonts. A. Gamonts associated in syzygy; primite (p), satellite (s). SEM. B. Higher magnification of the junction between the posterior end of the primite deutomerite (d) and apical part of the satellite protomerite (p). SEM. C. Detailed view of the junction (arrows) between folded pellicles covering the primite deutomerite (def) and the satellite protomerite (pef). SEM. D. Organisation of undulated epicytic folds covering the deutomerite. SEM. E. Higher magnification of deutomerite epicytic folds (ef); grooves (g) between folds. SEM. F. Cross section of the deutomerite pellicle; epicytic folds (ef), grooves (g), internal lamina (double arrowhead), rib-like myonemes (arrowhead). TEM. G. Cross section of deutomerite epicytic folds; 12-nm filaments (arrowhead), inner membrane complex (imc), internal lamina (double arrowhead), plasma membrane (pm), rippled dense structures (white arrowhead), unknown dense structure (arrow). TEM. H. Detailed view of epicytic folds in cross section revealing filamentous connections (arrowheads) localised between the plasma membrane (pm) and inner membrane complex (imc). TEM. I. Pellicle organisation revealed in a mechanically ruptured gamont; cytoplasm (c) with ectoplasmic network, epicytic folds (ef). SEM. J. The view of an ectoplasmic face (*) of a pellicle separated from the gamont cytoplasm; epicytic folds (ef). SEM. K. The septum (arrow) separating the protomerite (p) from the deutomerite (d); epicytic folds (ef). TEM.