FIGURES 28–33 in Morphology and ultrastructure of Hippodonta qinghainensis sp. nov. (Bacillariophyceae), a new diatom from Lake Qinghai, China

FIGURES 28–33. SEM images of Hippodonta qinghainensis. Fig. 28. External view of entire valve. Striae composed of simple lineolae throughout. Figs 29, 31. Close-up of apices. Terminal pores of raphe are weakly deflected towards one valve side. Two rows of apical areolae at the valve apices. Fig. 30. Close-up of central area. External central raphe endings weakly developed, teardrop-shaped depressions. Fig. 32. External view of complete frustules showing broad, unornamented girdle. Fig. 33. Detail of one apex in girdle view, showing two rows of apical areolae. Scale bars in Figs 28, 32, 33 = 2 µm; Figs 29, 30, 31 = 1 µm.