FIGURES 91–96. Diploneis stoermeri morphotype 1 in The genus Diploneis Ehrenberg ex Cleve (Bacillariophyta) from Lake Hövsgöl, Mongolia

FIGURES 91–96. Diploneis stoermeri morphotype 1, SEM external and internal valve views. Fig. 91. External view of the whole valve. Fig. 92. External view of the distal raphe endings with short terminal fissure. Fig. 93. Internal view of the entire valve. Fig. 94. Close view of the external cribrate occlusions. Fig. 95. Detailed external view of the mid valve. Fig. 96. External view of the proximal raphe endings, bent to the same side of the valve. Scale bars = 5 μm (Figs 91, 93, 95); 2 μm (Figs 92, 94, 96).