Cosmarium auriculatum var. bogoriense C. Bernard 1908

    Cells medium size measures 48-54 µm length and width 43-50 µm. Cells show shallow constriction at the center, sinus widely open outwards with rounded angles, isthmus 21-24 µm. Semicells elliptical with strongly arched and slightly truncated apex. Lateral margins broadly rounded and bearing widely placed 3-4 teeth and 5 undulations. Each tooth sharp and different length well developed teeth near the sinus; smooth cell wall.