FIGURES 29–34. Cymbella pamirensis SEM. 29 in Cymbella pamirensis sp. nov. (Bacillariophyceae) from an alpine lake in the Pamir Mountains, Northwestern China

FIGURES 29–34. Cymbella pamirensis SEM. 29. Valve in external view. 30. Close-up on apex in external view. 31. Close-up on proximal raphe endings in external view. 32. Valve in internal view. 33. Close-up on central area in internal view, note the three stigmata visible as elongated furrows connected to the striae (arrows) and the discontinuous stria interposed at mid-valve. 34. Close-up on apex in internal view showing the distal raphe fissure ending in helictoglossae and the apical pore field. Scale bars: 10 μm in Figs 29 and 32; 3 μm in Figs 30, 31 and 33; 2 μm in Fig. 34.