FIGURES 19‒37. Adlafia drouetiana. Figs 19‒32 in Morphology of Adlafia taxa (Bacillariophyta, Cymbellaceae), with proposition of two new species from Brazil

FIGURES 19‒37. Adlafia drouetiana. Figs 19‒32. Valve view, LM. Scale bar = 10 μm. Figs 33, 34. External valve view, SEM. Scale bars = 2 and 2.5 μm, respectively. Fig. 35. Median region of valve showing the striation pattern and proximal raphe ends, SEM. Scale bar = 1 μm. Figs 36, 37. External view of valve apices and distal raphe end, SEM. Scale bars = 1 μm.