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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Diploneis parma 01
Krammer, K. and Lange-Bertalot, H. (1991). Baccilariophyceae: Naviculaceae. in: Süßwasserflora von Mitteleuropa (H. Ettl, J. Gerloff, H. Heynig & D. Mollenhauer, eds), 2(1), pp. 287-288; 660-661 [fig.109:1-7]
Diploneis parma Cl. 1891
Valve is broadly elliptical in shape, with broadly rounded apices; raphe is filiform, with broad to rounded proximal ends; central area formed by raphe and axial area is "H-shaped"; axial area wide in the middle (convex), tapering towards valve ends and variable in breadth; distinctly punctate on edge of axial area, with some populations having two rows of punctae; punctate striae more or less parallel in the middle, becoming more radiate towards valve ends; length is 20-50µm, breadth is 12-23µm; striae count is 14-17 in 10µm (20-28 punctae in 10µm)
some specimens have larger length and breadth values than type