FIGURES 206–210, 213–219 in The genus Diploneis Ehrenberg ex Cleve (Bacillariophyta) from Lake Hövsgöl, Mongolia

FIGURES 206–210, 213–219. Diploneis aff. heteromorphiforma, LM and SEM valve views. Figs 211, 212. Diploneis dimorpha, type slide (O4/78) from Hustedt collection, the Friedrich Hustedt Study Centre for Diatoms in Bremerhaven, Germany. Figs 206–212. LM valve views. Fig. 213. Valve central area with proximal raphe endings. Fig. 214. View of the whole valve. Fig. 215. Close view of the external distal raphe endings. Fig. 216. Internal valve view. Fig. 217. Internal view of the central area with proximal raphe ends. Fig. 218. Showing the distal raphe endings from the interior. Fig. 219. View of the alveoli structure in a corroded specimen. Scale bars = 10 μm (Figs 206–212, 216); 5 μm (Figs 214, 219); 2 μm (Figs 213, 215, 217, 218).