PLATE 8. Eunotia pseudoambivalens Q. Liu, S. L in New and Interesting Diatoms from the Shiwan Wetwalls, Yunnan Province, China. III. Valve ultrastructure of four new species of Eunotia (Bacillariophyceae: Eunotiales)

PLATE 8. Eunotia pseudoambivalens Q. Liu, S. L. Xie & Kociolek, sp. nov. Figures 60–65. Scanning electron microscope images. Figures 60–62, external views. Fig. 60. Whole valve view. A single, thick spine is present at each apex. Fig. 61. Apex of the valve showing spine with thick base, distal raphe end curving from the ventral mantle to the dorsal mantle. Areolae are occluded. Fig. 61. Mid-valve showing uniseriate striae with occlusions. Figs 63–65, internal views. Fig. 63. Whole valve with a pseudoseptum present at each apex. Fig. 64. Valve apex showing pseudoseptum, thickened rimoportula and helictoglossa. Fig. 65. Mid-valve with striae in trough-like openings.