FIGURES 3A–C. SEM, valve exterior. Figs 3A, 3B in A new genus and species in the diatom family Eunotiaceae Kützing (Bacillariophyceae) from the Amazonian hydrographic region, Brazil

FIGURES 3A–C. SEM, valve exterior. Figs 3A, 3B are of the valve apex showing the raphe, presence of siliceouis nodules and spinules on the valve face and external openings of rimoportulae. Fig. 3C. Valve center showing sternum positioned about at the center of the valve. Areolae are small, round. Scale bars = 2 µm for all figures.