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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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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)

Gomphonema contraturris

Gomphonema contraturris

Lange-Bertalot & Reichardt
Lange-Bertalot, H. (1993). 85 New Taxa and much more than 100 taxonomic clarifications supplementary to Süßwasserflora von Mitteleuropa 2(1-4). Bibliotheca Diatomologica, 27, pp. 57, 58, 320, 321 [t.78:2-8]
Ecological Preference:

Valves have clavate shape consistent over a wide range of lengths; some overlap with G. neonasutum can be seen where they co-occur
  • Transect Project

  • Sample localities:
  • Water Conservation Area 2A (WCA 2A)