FIGURES 7–13. Gomphonema wuyiensis, SEM. External views. Fig. 7 in Gomphonema wuyiensis sp. nov., a new freshwater species (Bacillariophyceae) from Wuyi Mountains, China

FIGURES 7–13. Gomphonema wuyiensis, SEM. External views. Fig. 7. External view of a whole valve. Figs 8,11. Headpole showing external distal raphe end extending onto the mantle. Fig. 9. Central area show stigma opening differentiated from the areolae. Central area is narrowly rectangular in shape. Fig. 10, 13. Footpole, with bilobed apical pore field restricted to the mantle, comprised of different-sized porelli that are physically removed and differentiated from areolae. Figs 12. Note the C-shaped or round openings of the areolae. Scale bars = 10 μm (Fig. 7), 2 μm (Figs 8, 9), 1 μm (Figs 10–12), 0.5 μm (Fig. 13)