FIGURE 9 in New and interesting aerial diatom assemblages from southwestern Iceland

FIGURE 9. Light (E–J) and SEM (A–D) microscopy images of aerial diatom populations of Humidophila gallica from southwestern Iceland. A–B. external view showing spine location and external expression of areolae, C–D. girdle view of two linked frustules showing side view of spines and presence of areolae on valve mantle and cingulum, E–F. valve view of longer form, G. tilted girdle view of a single frustule with visible spines, H. girdle view of a chain of cells. I–J. valve view of shorter form. LM scale bar = 10 μm, SEM scale bars as shown.