File:Sexypfiesteria.JPG

Illustration of the proposed sexual cycle of Pfiesteria shumwayae (gray ovals, nuclei; broken arrow indicates an inferred relationship). (1) Fusing gametes. (2) Planozygote. (3) Zygotic cyst with nuclear cyclosis. (4) Production of two flagellated offspring after nuclear cyclosis. (5) It was unknown whether these offspring required a second postzygotic division before reentry into mitotic interphase. (6) Production of two secondary cysts after nuclear cyclosis, with release of four flagellated offspring.

Photo belongs to M. Parrow and J. Burkholder Source and copyright is J. Phycol. 39,697–711 (2003)