FIGURE 13 in Taxonomy of epilithic diatoms and teratological forms under the presence of metals in surface sediment

FIGURE 13. Epilithic diatoms from Cascavel River micro-watershed in SEM. A. Eunotia bilunaris, teratological valve with constriction in the median portion of the valve (arrow). B–C. E. botulitropica. C. Girdle view. D–E. E. rhomboidea. E. Internal view. F–G. E. desmogonioides, internal views. H. E. georgii. I. Geissleria punctifera. J. Gomphonema lagenula, teratological valve with bent apex (arrow). K–L. G. pumilum. K. Internal view. Scale bars: 2 µm (Figs A–G, I–K), 5 µm (Fig. H), 1 µm (Fig. L).