FIGURE 2 in New and interesting aerial diatom assemblages from southwestern Iceland

FIGURE 2. Light (B–T) and SEM (A, U–V) microscopy images of diatom assemblages from aerial sites in southwestern Iceland. A–G. Staurosirella neopinnata: A. external, girdle view of two linked frustules, left frustule shows the completed synthesis of new valves within the frustule, B–D. size series in valve and E–G. girdle view, F and G. two linked frustules; H. Fragilaria nitzschioides: valve view; I–J. Meridion circulare var. constrictum: I. 2 frustules in girdle view, J. valve view; K. Fragilaria perminuta: valve view; L–M. Aulacoseira alpigena: L. girdle view and M. valve view; N, S–T. Orthoseira roeseana: N. girdle view with irregular linking spines and longitudinal areolae on the valve mantle, S–T. Valve view with 3 to 4 carinoportulae; O–P. Stauroforma atomus: valve views; Q, R, U–V. Hygropetra balfouriana: Q–R. valve view, U. SEM of a tilted frustule with both valve and girdle views visible, U. shows the nature of the striae, and raphe, V. internal view. LM scale bar = 10 μm, SEM scale bars as shown.