MORPHOLOGY OF THE GAMETOCYSTS AND OOCYSTS OF GREGARINA-KOROGI HOSHIDE(APICOMPLEXA, EUGREGARINORIDA)

The ultrastructure of gametocysts and oocysts of Gregarina korogi Hosh ide, 1952 are described for the first time. The ultrastructure of the gametocyst change after they are eliminated from the host. Mature game tocysts were composed of five parts, a wall, homogeneous layer, spongi form layer, centrosphere and sporoduct. The oocysts were covered with thick homogeneous walls and there were three openings in the walls. Th e oocysts had numerous small projections on the surface and 14 to 15 c oncentric folds at both ends of the longitudinal axis. Eight sporozoit es were arranged longitudinally within the oocysts. The sporozoites us ually had one nucleus, but in some no nucleus but elongate strands wer e present.