Figure 5: Standard dimorphic or trimorphic reproductive cycle in benthic, medium- to large-sized foraminifera according to, 1999. Schizogeny, eventually repeated several times, may be widespread in larger foraminifera from oligotrophic habitats. Planktic foraminifera seem to have no dimorphic life cycle. Life cycles are linked in various ways to seasonal cycles. Example: Heterostegina depressa d' , equatorial sections, Gulf of Aqaba, Red Sea (from , 1977).