FIGURES 16–26. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. SEM. 16–20 in Taxonomic revision of Eunotia luna var. aequalis f. paucistriata Frenguelli and E. luna var. aequalis f. major Frenguelli: analysis of type material, lectotypification and current taxonomic status

FIGURES 16–26. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. SEM. 16–20. Valves in external views. 16–18. General views 19. Detail of valve apex. 20. Valve slightly tilted showing the dorsal mantle with short striae. 21–25. Valves in internal view. 21–22. General views. 23. Detail of valve center showing the arrangement of striae. 24. Detail of the valve apex. 25. Detail of the striae in the valve center; note the areolae located in narrow troughs. 26. Tilted valve showing the raphe on the ventral mantle; note the different areolation pattern between the raphe and the valve margin (arrows). 16–20, 23–25. Specimens from Series 264. 21. Specimen from Series 261. 22. Specimen from Series 264. 26. Specimen from Series 268. Scale bars = 10 µm (Figs 16–18, 20–23, 26), 5 µm (Figs 19, 24), 2 µm (Fig. 25).