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 .
You can also click on one of labeled areas on the map to browse by location.
Jensen, N.G.: F. Hustedt. The Pennate Diatoms. A translation of Hustedt's "Die Kieselalgen, 2. Teil", pg.413, fig.902;
Valve is elliptical to elliptical-lanceolate with somewhat drawn out, fairly sharp ends; raphe is straight or very narrow with small, somewhat transversely widened and irregular central area; cell wall is areolate, areolae forming a closed net arranged in three striae systems crossing each other and appearing noticeable transapically elongated (transapical rows are slightly radial, about 20 in 10µm, while sloping rows are regular, about 12 in 10µm); chamber ring is narrow, about 1.5µm wide; chambers are uniform, rectangular or square with convex or free margins, and occurring up to the drawn out ends (4-6 in 10µm); length is 23-40µm long, breadth is 9-17µm wide
specimen recorded is larger than type
23 - 40 µm
9 - 17 µm
4 - 6