FIGURES 59–62. Odontidium longiovalum. SEM. Fig. 59 in The genus Odontidium (Bacillariophyta) in the Himalaya-a preliminary account of some taxa and their distribution

FIGURES 59–62. Odontidium longiovalum. SEM. Fig. 59. Detail of valve surface. Fig. 60. Areolae with occlusions. Fig. 61. Frustule in girdle view. Fig. 62. Mantle with rows of spines, and two girdle bands. Figs 59–60. NMW.C.2007.006.K58. Figs 61–62. NMW. C.2007.009.2000.La.spr.3/2. Scale bars = 2 μm (Figs 61–62), 1 μm (Fig. 59), 200 nm (Fig. 60).