FIGURES 16–20. Figs. 16–18. Paralia sulcata var. coronata, Fig. 16 in Diatoms (Bacillariophyta) From Artificial Substrates And Sediments In The Caribbean Sea Off Yucatan, Mexico

FIGURES 16–20. Figs. 16–18. Paralia sulcata var. coronata, Fig. 16. LM view of external valve face. Fig. 17. SEM view of external valve face. Fig. 18. SEM of whole frustule in girdle view. Figs. 19–20. P. fenestrata, Fig. 19. LM view of external valve face. Fig. 20. SEM of whole frustule in girdle view. Scale bar: figs. 17, 19 = 1 μm, figs. 16, 18, 20 = 10 μm.