FIGURES 37–40 in Ninastrelnikovia lateritica sp. nov., a new and rare freshwater diatom species from the rocky pools of the Western Ghats, India with a note on the genus Ninastrelnikovia Lange-Bertalot & A.Fuhrmann (Bacillariophyta)

FIGURES 37–40. Close up of internal valves of Ninastrelnikovia lateritica sp. nov. (SEM). 37. Curved proximal raphe end found in a intermediate valve as it bears spines (arrows). 38 & 39. Curved proximal raphe end found in a terminal valve which shows slender siliceous slats (arrows). 40. A broken apical part showing strut like structures which holds the mantle. (All scale bars represent 1 μm).