FIGURES 23–28 in Identity and typification of Diploneis ostracodarum, Diploneis budayana and Diploneis praeclara (Bacillariophyta)

FIGURES 23–28: Diploneis ostracodarum, SEM micrographs. Fig. 23. External view of the whole valve. Fig. 24. Distal raphe ending with terminal fissures. Fig. 25. Internal view of an entire valve. Fig. 26. External view of corroded valve. Fig. 27. External view of the central area with proximal raphe endings. Fig. 28. Internal view of the central area with proximal raphe endings, showing the structure of the alveoli. Scale bars = 10 µm (Figs 23, 25, 26); 5 µm (Figs 24, 27, 28).