FIGURES 439–441 in Morphological and molecular characterization of twenty-five new Diploneis species (Bacillariophyta) from Lake Tanganyika and its surrounding areas

FIGURES 439–441. Diploneis cocquytiana sp. nov., SEM internal valve views, Lake Tanganyika, Mutondwe Island. 439. A whole valve. 440. Detail valve apices, showing simple and slightly elevated distal raphe ends and openings of the alveoli covered by thin silica layer. 441. Central area with simple and slightly elevated proximal raphe ends. Scale bars = 10 μm (Fig. 439), 5 μm (Figs 440, 441).