sporoblast

sporoblast /spôr″əblast′/ [Gk, sporos + blastos, germ] , any cell that gives rise to a sporozoite or spore during the sexual reproductive phase of the life cycle of a sporozoon. It refers specifically to the cells resulting from the multiple fission of the encysted zygote of the malarial parasite Plasmodium, from which the sporozoites develop.