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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)

Navicula cryptocephala

Krammer K. & Lange-Bertalot H. (1997): "Susswaserflora von Mitteleuropa", Vol.1, pg.102,103, Fig.31:8-14; Krammer K. & Lange-Bertalot H. (1997): "Susswaserflora von Mitteleuropa", Vol.4, Fig.64:1-8; Guide methodologique pour la mise en oeuvre de I'Indice biologique diatomees"(2000), Pl.34; Patric R. & Ch.W. Reimer (1966):"The diatoms of the United States", Vol.1, p.503; Pl.48, fig.3;
Navicula exilis (Kutzing 1844)
Ecological Preference:
Valve is lanceolate with globose- to rostrate-capitate ends; axial area is narrow but slightly wider at the centre of the valve where it merges with a rounded, transverse central area that is often irregular in shape; striae are radiate throughout most of the valve, becoming parallel to slightly convergent at the ends; the nominate variety resembles N. rhynchocephala Kütz. Except for its smaller size and finer striation; length is 20-40µm, breadth is 5-7µm; striae count is 16-18 in 10µm
  • Southeast Florida Coastal Mangroves
  • Florida Bay Paleo Project
  • Dosing Project
  • Transect Project

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