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.
Heiden & Colbe
Simonsen, R. (1992). The diatom types of Heinrich Heiden in Heiden & Kolbe 1928. Bibliotheca Diatomologica, Band. 24, pg. 73, Pl. 66, Fig. 7-9;
Valves semi-lanceolate strongly constricted at the center with protracted rostrate to semi-capitate ends deflected dorsally. Dorsal margin biundulate; ventral margin straight. Raphe branches straight; proximal and distal ends deflected dorsally. Conopeum well visible under LM. Dorsal striae parallel at the center becoming radiate towards the ends, crossed by longitudinal costae well visible under LM. Ventral striae short hardly visible under LM.