FIGURES 12–19 in Delicata chongqingensis sp. nov., a new cymbelloid diatom species (Bacillariophyceae) from Daning River, Chongqing, China

FIGURES 12–19. Delicata chongqingensis, SEM, external views. 12, 13. External view of the whole valve. 14–17. External view of the central part of the valve showing the dorsal semifascia, three to four isolated, rounded or slite-like areolae (arrows), and the shortened striae in the valve centre on the dorsal side. 18, 19. Valve apices and tilde-shaped areolae forming distinct undulate striae. Scale bars = 5 μm (Figs 12, 13), 4 μm (Figs 14, 15), 2 μm (Figs 16–18) and 3 μm (Fig. 19).