FIGURES 11–15 in Typification and taxonomy of Gyrosigma tenuissimum (W. Sm.) J.W. Griffith & Henfr., comparison with Gyrosigma coelophilum N. Okamoto & Nagumo and description of two new taxa: Gyrosigma tenuissimum var. gundulae var. nov. and Gyrosigma baculum sp. nov. (Pleurosigmataceae, Bacillariophyta)

FIGURES 11–15. Gyrosigma tenuissimum, additional populations, LM images. Fig. 11. Specimen from BRM ZU8/73, Sicily. Stitch of 3 stacks of 9, 6, and 9 images respectively. Bar = 10 µm. Fig. 12. Another specimen from BRM ZU 8/73, stitch of 2 stacks of 6 and 7 images respectively. Bar = 10 µm. Fig. 13. LM specimen from BRM ZU 8/35, Sardinia. Stitch of 3 stacks of 14, 12 and 9 images respectively. Bar = 20 µm. Inset: detail of striation, bar = 2 µm. Fig. 14. LM of another specimen from BRM ZU 8/35, Sardinia. Stitch of 2 stacks of 17 and 16 images respectively. Bar = 20 µm. Fig. 15. LM of specimen from Hvar, Adriatic Sea. Stitch of 3 stacks of 14, 10 and 12 images respectively. Bar = 20 µm.