FIGURE 8–15 in Description of two new Cymbella (Bacillariophyta) species from Sakarbaşı spring, Turkey

FIGURE 8–15. SEM micrographs of Cymbella balkii sp. nov. 8. External view of entire valve, 9. External view of central area, 10. External view of valve apex showing apical pore field. 11. External view of valve center showing striae composed of slit-like areolae, becoming round close to axial area, varied shapes of stigmata and the proximal raphe endings, 12. Internal view of entire valve. 13. Internal view of valve central area, 14. Internal view of valve ends with dorsally curved, knob-like helictoglossae, apical pore field and uniseriate striae, 15. Internal view of valve centre showing internal stigma openings. Scale bars 20 µm (Figs 8, 12), 5 µm (Figs 9, 13); 4 µm (Figs 10, 11, 15); 3 µm (Fig 14).