THE MICROSPORIDIUM TOXOSPORA-VOLGAE GEN-N , SP-N FROM CHIRONOMIDAE LARVAE OF THE GENUS CORYNONEURA

The ultrastructure of the octosporous microsporidium Toxospora volgae gen. n., sp. n. is studied. In the beginning of sporogony there is dip locaryon. Stages of sporogony are limited by thin and fragile envelope of the sporophorous vesicle. The C-from, 0.7-0.8X6-8 mm long spores h ave one elongated nucleus, a layered exospore and a polar tube of unus ual construction. The polaroplast consists of two parts - anterior clo sely paked lamellae and posterior tube/chambered. The microsporidium i s compared to Toxoglugea microsporidia. The taxonomic relations betwee n the genera Toxoglugea and Toxospora are discussed.