FIGURES 9–15. Figs. 9–10. Biddulphia tridens, Fig. 9 in Diatoms (Bacillariophyta) From Artificial Substrates And Sediments In The Caribbean Sea Off Yucatan, Mexico

FIGURES 9–15. Figs. 9–10. Biddulphia tridens, Fig. 9. SEM of whole frustule in girdle view. A pseudocellus is present at each elevated apex. Fig. 9a. Details of areolae of the girdle band. Fig. 9b. Details of striation of the girdle band. Fig. 9c. Several spines project from the elevations. Fig. 10. LM view of external valve face. Figs. 11–12. Odontella aurita. Fig. 11. SEM of whole frustule in girdle view. Fig. 12. LM in girdle view. Fig. 13. Biddulphia biddulphiana, Figs. 14–15. Eunotogramma laeve. Fig. 14. SEM view of internal valve face. Scale bar: fig. 9, 11, 14 = 1μm, figs. 10, 12, 13, 15 = 10 μm.