ULTRASTRUCTURE OF TUZETIA-CORYNIFORMIS (PROTOZOA, MICROSPORIDIA) WITHTHE GENUS REVISION OF THE SPECIES

The ultrastructure of Tuzetia coryniformis Voronin, 1968, a parasite o f the copepode Macrocyclops albidus Jur., is described with emphasis o n the sporophorous vesicle and mature spore. The sporogonial plasmodiu m is divided by a rosette-like budding, producing 4-8 sporoblasts. Sta ges of sporogony are limited by a thin and fragile envelope of the spo rophorous vesicle. The lageniform, 7-8.5 mum long uninucleate spores h ave a heterofilar polar filament arranged in 16-17 coils. The polaropl ast consists of three lamellar parts. Young spores have the exosporal coat which is transformed into the individual episporal envelope in ma ture spores. On the basis of the ultrastructural cytology the microspo ridium is transferred from the genus Tuzetia to the genus Cougourdella .