FIGURES 45–53. Cocconeis sawensis, type material from Iraq. 45–50 SEM. 51–53 TEM. 45, 46 in Additional morphological features of the epiphytic diatom Cocconeis sawensis Al-Handal & Riaux-Gobin (Cocconeidaceae, Bacillariophyta) from a coastal lagoon, Southern Brazil

FIGURES 45–53. Cocconeis sawensis, type material from Iraq. 45–50 SEM. 51–53 TEM. 45, 46. External view of the valve raphe. 47–49. Internal view of the sternum valve. 50. External view of the sternum valve. 51. General view of the sternum valve. 52. Areolae with broken hymens. 53. Detail of the fimbriae of sternum valve valvocopula. Scale bars = 2 μm (Figs 45–47, 50, 51), 5 μm (Figs 48, 49), 0.5 μm (Fig. 52), 1 μm (Fig. 53).