FIGURES 4A–E. SEM, valve interior. Fig. 4A in A new genus and species in the diatom family Eunotiaceae Kützing (Bacillariophyceae) from the Amazonian hydrographic region, Brazil

FIGURES 4A–E. SEM, valve interior. Fig. 4A. Valve view. Scale bar = 20 µm. Figs 4B-D showing apex of valve with raphe branch, helictoglossa and rimoportulae evident. Fig. 4E. Central portion of the valve with interruption of striae evident in the center of the valve. Scale bars = 2 µm for figures 4B–D.