ULTRASTRUCTURAL OBSERVATIONS ON SPOROGENESIS OF MYXOBOLUS KWANGSIENSIS HSIEH, GONG & XIAO FROM THE KIDNEY OF DACE LABEO ROHITA

The early stages and capsulogenetic stages of sporogenesis of Myxobolus kwangsiensis were studied indetail by electron microscopy. M. kwangsiensis is an intrasellular myxsporen infecting the epithelial cellsof kidney tubules of young dace Labeo rohita. The M. kwangsiensis sporogenesis presents the typical featuresof myxosporea. The initial stages are multinuceate primary cells, with one primary cell typicallyenclosing one secondary cell. The secondary cells are formed directly by cytokinesis inside the primary cells. Theprimary cell participates in the formation of the secondary cell nucleus. The nuclear division of primarycell is asynchronous by amitosis. The parasitic organisms may degenerate inside the epithelial cells at anystage. The modes of sporoblast formation , the typical features of myxosporea and the cause of its degradationare discussed.     

南海鱼类寄生粘孢子虫四囊科—新属,新种

本文对粘孢子虫四囊科一新属,新种进行了描述,这种粘孢子虫1982年4月发现于南海北部湾蓝圆鲹的肌肉中,其孢子的背面观呈十字形,具有4块长度不等的棘状壳瓣和4个不同大小的极囊,本新属,新种被定名为四棘虫新属Tetraspina gcn.now.,鲹四棘虫新种Tetraspina decapterus sp.nov。