FIGURES 11–17 in Halamphora minima (Catenulaceae, Bacillariophyta), new brackish diatom species from the mudflat in Hampyeong Bay, Korea

FIGURES 11–17. SEM micrographs of Halamphora minima sp. nov. Fig. 11. External whole valve view, with central area (asterisk), and dorsal raphe ledge (arrow). Fig. 12. Internal whole valve view. Fig. 13. Detail of external valve apex,with dorsal raphe ledge (arrow) Fig. 14. Detail of internal valve apex showing tongue-like proximal helictoglossae (double asterisk), poorly developed distal helictoglossae (arrowhead), and internal longitudinal rib (arrow). Fig. 15. Detail of internal dorsal areolae occluded by hymens (arrows). Fig. 16. Dorsal girdle bands with two rows of poroids. Fig. 17. frustules showing the ventral girdle bands with dorsal raphe ledge (arrow). Scale bars: Figs 11—14, 16, 17 = 1 μm, Fig. 15 = 0.5 μm.