FIGURES 152–165 in The genus Diploneis Ehrenberg ex Cleve (Bacillariophyta) from Lake Hövsgöl, Mongolia

FIGURES 152–165. Diploneis exigua, LM and SEM valve views. Figs 152–159. LM valve views. Figs 153, 156, 158. Specimens from the holotype slide, M272A. Fig. 160. External view of the entire valve. Fig. 161. External distal raphe endings with short terminal fissure. Fig. 162. Broken valve, showing the external and internal opening of the alveolate striae. Fig. 163. Internal view of the distal raphe endings. Fig. 164. Showing the simple proximal raphe endings from the interior. Fig. 165. Internal view of the whole valve. Scale bars = 10 μm (Figs 152–160, 165); 3 μm (Fig. 161); 2 μm (Fig. 162); 1 μm (Figs 163, 164).