FIGURES 12–18 in Morphology and phylogeny of Halamphora yongxingensis sp. nov. (Bacillariophyta), a new marine benthic diatom isolated from Yongxing Island, South China Sea

FIGURES 12–18. Halamphora yongxingensis sp. nov.,SEM micrographs. Fig. 12. Frustule in dorsal view. Note the valve mantles and the girdle bands. Scale bar = 2 μm. Fig. 13. Frustule in ventral view. Note the small central area, girdle bands and uniseriate areolae on the valve dorsal striae. Scale bar = 2 μm. Fig. 14. Valve in external view showing the uniseriate dorsal striae, continuous ventral striae, the narrow conopeum and the raphe. Scale bar = 2 μm. Fig. 15. Valve in external view showing the high mantle on dorsal side. Scale bar = 2 μm. Figs 16, 17. Central part of the valve in external view. Scale bar = 1 μm. Fig. 16. Note the proximal raphe fissures bent dorsally, teardrop-shaped central pores. Fig. 17. Note the dorsal striae composed of uniseriate areolae throughout (arrow). Fig. 18. Detail of the valve apex in external view. Note the distal raphe fissure bent dorsally (arrow a). Also note the conopeum broadens at the poles and then tapers abruptly, forming a V-shape at the ends (arrow b). Scale bar = 2 μm.