FIGURES 245–257. Figs. 245–246. Psammodictyon panduriforme var. panduriforme. Fig. 245. SEM valve view and cingular bands. Fig. 246 in Diatoms (Bacillariophyta) From Artificial Substrates And Sediments In The Caribbean Sea Off Yucatan, Mexico

FIGURES 245–257. Figs. 245–246. Psammodictyon panduriforme var. panduriforme. Fig. 245. SEM valve view and cingular bands. Fig. 246. LM valve view. Fig. 247. P. rudum. Fig. 248. P. panduriforme var. continuum. Fig. 249. P. cf. panduriforme var. panduriforme. Fig. 250. Nitzschia amabilis. Figs. 251. N. panduriforme var. minor. Fig. 252. Tryblionella coarctata. Figs. 253–256. Nitzschia panduriformis var. continua. Fig. 253. SEM valve view. Figs.254–256 LM valve view. Fig. 257. Nitzschia persuadens. Scale bar: figs. 248–250, 253–257 = 1 μm, figs. 245–247, 251, 252 = 10 μm.