FIGURE 5 in New and interesting aerial diatom assemblages from southwestern Iceland

FIGURE 5. Light (A–F, K–L) and SEM (G–I) microscopy images of aerial diatom assemblages from southwestern Iceland, Eunotia species. A–F, H–I. Eunotia bigibba: A. two live frustules in girdle view, C–F, I. valve view, B–F. size diminution series, and B. girdle view showing raphe position, H. arrangement of the cingulum and areolae on the mantle, and I. valve view showing arrangement of punctate striae and raphe ends on the valve face. Note the appearance of the hyaline area on the ventral edge of the valve where the striae stop short (i); G, K–L. Eunotia bidens: all valve views, note the swellings along the ventral margin where the proximal raphe ends. Frustule K slightly tilted. LM scale bar = 10 μm, SEM scale bars as shown.