FIGURES 9–14. Gomphonema shanghaiensis W in Gomphonema shanghaiensis sp. nov., a new diatom species (Bacillariophyta) from a river in Shanghai, China

FIGURES 9–14. Gomphonema shanghaiensis W. Zhang & Kociolek, SEM. External and internal views. 9–11. Exterior view of a whole valve, showing the valve variability, straight raphe with rounded proximal ends, gibbous center portion, round foot pole and rostrate to narrow round headpole. 12–14. Interior view of differently shaped whole valves, showing pseudosepta at both ends and offset helictoglossae. Scale bars = 10 μm.