Figure 3 | Scientific Reports

Figure 3

From: Simonsenia aveniformis sp. nov. (Bacillariophyceae), molecular phylogeny and systematics of the genus and a new type of canal raphe system

Figure 3

Simonsenia spp.

in EM. (A–D) Simonsenia aveniformis. (A) S. aveniformis internal view of the whole specimen, note the internal openings of the portulae = alar canals (arrow) and the place where the two transapical ribs are formed (arrowhead). (B) Close up of the apical part of the valve interior, note the presence of the portulae openings (white arrowhead), perforated fibulae (arrow) and of the apical raphe ending terminating in a helictoglossa (black arrowhead). (C,D) S. aveniformis in TEM. (C), Valve apical part showing the tube with raphe elevated on braces. Note the elevated raphe bearing tube (arrowhead). (D) Close up of the raphe bearing tube with supporting braces composed of solid silica (black arrow), the raphe bearing tube (black arrowhead) and projection of the portulae opening into the raphe bearing tube (white arrowhead). (E), S. delognei ssp. rossii close up of the valve interior, note the perforated fibulae (arrow) and the openings of the portulae (arrowhead). (F) S. delognei close up of the valve interior showing perforated fibulae (arrow) and openings of the portulae (arrowhead).

Back to article page