FIGURES 2–22 in Cymatosirella Dąbek, Witkowski & Sabbe gen. nov., a new marine benthic diatom genus (Bacillariophyta) belonging to the family Cymatosiraceae

FIGURES 2–22: Cymatosirella capensis (Giffen) Dąbek, Witkowski & Archibald comb. nov., Langebaan Lagoon, South Africa. Following images originate from: slide G630/2 (figs 10–15, 17), G628 (figs 3,4), G629 (figs 5–9), SZCZ 17582 (figs 18–21), SZCZ 17589 (figs 16, 22). Fig. 2: Original drawings of Malcolm H. Giffen of Cymatosira capensis (Giffen 1975). Figs 3–13: LM images. Scale bar = 10 µm. Figs 14–22: SEM images. Figs 14, 15: Frustule in girdle view with distinctly undulated outline and spines (arrowhead). Figs 16, 17: Valve view, each elevation bearing an ocellulus (arrowhead) surrounded by unperforated rim. Note the areolae with external cribra. Fig. 18: External view of the mantle and cingulum. Girdle bands are perforated by the one row of poroids (arrowhead). Fig. 19: Internal view of the mantle and areolae. Figs 20, 21: External view of ocelluli composed of porelli with small spines (arrowhead). Fig. 22: Valve surface view with hollow spines and areolae with external cribra.