Vol. 1, Issue 6 (2016)
Cytology studies of spermatogenesis of Paryphostomum bubulcusi
Author(s): Dr. Mamata Tiwari
Abstract: Cytology of spermatogenesis in the digenea has attracted much attention of various investigators, but most accounts are restricted to the routine features of processes. The mitochondria and other cytoplasmic components of the male and the female germ cells have received less attention. However, recently, the utilization of the electron microscope and other advanced techniques have led the scientists to investigate the ultra-structure and biology of various components involving gametogenesis. A number of previous workers have observed a great similarly in the general pattern of spermatogenesis in the digenetic trematodes. In this process the three spermatogenesis division and two subsequent mitotic divisions result in the formation of the clusters of 2, 4, 8, 16 and 32 spermatids. These spermatids along with centrosomal granules and flagella finally form the sperms. After the liberation of fully mature sperms, the residual mass of cytoplasm is left behind. In the membrane of residual cytoplasm many holes are seen through which the nuclei of the sperms come out. The general pattern of the dividing male germ cells during gametogenesis are diagramatically.