Welcome to the Diatom Image Database! The Periphyton Group at Florida International University created and maintains the Diatom Image Database, which includes over 980 diatom taxa found in the greater Everglades region of south Florida. Please send questions or comments about the Diatom Image Database to Franco Tobias .
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Mann, D.G. (1989b):"The diatiom genus Sellaphora separation from Navicula"
Navicula pupula Kütz. 1844
Valve is linear-lanceolate with broad, rostrate ends; axial area is narrow; central area is a transverse fascia which almost reaches the valve margins; terminal nodules are transversely widened, clearly marked by the end striae which are thicker than the other striae; terminal striae are parallel or slightly radiate, while those toward the valve centre are distinctly radiate, short and irregular in length about the central area; length is 20-40µm, breadth is 7-11µm; striae count is 13-17 in 10µm (centre) to 26 in 10µm (ends)