FIGURES 57–60 in Morphological and molecular characterization of twenty-five new Diploneis species (Bacillariophyta) from Lake Tanganyika and its surrounding areas

FIGURES 57–60. Diploneis cristata sp. nov., SEM internal valve views, Lake Tanganyika, Isanga Bay. 57. Whole valve. 58. Central area with simple and slightly elevated proximal raphe ends. 59. Mid-valve, showing proximal raphe ends and alveolate openings covered by a thin silica layer. 60. Close view of alveoli and valvocopula with serrated advalvar edges. Scale bars = 10 μm (Fig. 57), 5 μm (Figs 58–60).