THE ULTRASTRUCTURE OF THE MICROSPORIDIUM NOSEMA-MELIGETHI AND ESTABLISHMENT OF THE NEW GENUS ANNCALIIA

The ultrastructure study of the microsporidium Nosema meligethi from M eligethes aenus (Coleoptera) revealed some peculiarities of its organi zation. This species is a disporous, all stages of its development hav e a diplocaryon. The cytoplasm of invaded host cells contains numerous secretory tubular products. There are some essential distinctions bet ween N. meligethi and the type species of the genus Nosema - N. bombyc is. N. meligethi is characterized by: 1) the plasma membrane of prespo rial stages is covered with a coat of tubular and granular structures, 2) the exospore is covered with tubular structures directing into the host cell cytoplasm, 3) the polar filament is slightly anosofilar, 4) the polaroplast consists of the anterior small lamellar part and post erior most tubular part, 5) the host cell cytoplasm is heavy destroied around parasite cells. As a result the new Anncaliia has been establi shed. The former Nosema meligethi has been transfered to that genus.