Ultrastructure of ovarian follicular epithelium of the Amazonian fish Pseudotylosurus microps (Teleostei: Belonidae): morphological and histochemical characterization of the intercellular deposits

the present paper reports the presence of great quantities of electrondense intercellular material in the follicular epithelium of p. microps. the material apparently is uptaken from circulation and enter the follicle through the intercellular spaces accumulating in the epithelial median-apical intercellular spaces and in perioocytic space. the accumulation starts in the early growth of the primary oocyte and proceed until vitellogenesis. the possible chemical nature and function of the deposits are discussed.