Skip to Main Content

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 .

Search the Diatom Image Database

View a list of all species

You can also click on one of labeled areas on the map to browse by location.
Map of south Florida Loxahatchee (LOX) WCA 2A WCA 3A Biscayne Bay Shark River Slough (SRS) Taylor Slough (TS) Florida Bay Everglades National Park (ENP) Everglades National Park (ENP)

Nitzschia cf. semirobusta

Nitzschia cf. semirobusta

Lange-bertalot, H. (1993). 85 New Taxa and much more than 100 taxonomic clarifications supplementary to Süßwasserflora von Mitteleuropa 2(1-4). in: Bibliotheca Diatomologica 27, pp. 149-151; 406-407 [t.120:7-8;14-19]
(?) Nitzschia robusta Hustedt 1949; Nitzschia denticula Grunow sensu Podzorski 1985 et sensu auct. nonnull.; 16 Nitzschia amphibioides Hustedt (1956 in Gessner, excl. type)
Frustule is rectangular in girdle view, moderately convex midvalve; valve is linear to lanceolate, slightly curved in the middle, with acutely rounded apices; 5-9 moderately elongate fibulae in 10µm; transapical striae are coarsely punctate; length is 12-15µm, breadth is 4-6µm; striae count is 13-17 in 10µm
specimens recorded have been larger than as described
  • Dosing Project
  • Transect Project

  • Sample localities:
  • Water Conservation Areas (WCAs)