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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)

Actinocyclus subtilis

(Gregory) Ralfs
Hustedt, F. (1930). Die Kieselalgen Deutschlands, Osterreich und der Schweiz unter Berucksichtigung der ubrigen Lander Europas sowie der angrenzenden Meeresgebiete. Vol.1. Pg.534, Fig. 304;
Eupodiscus subtilis (Gregory, 1857)
Ecological Preference:
Valves circular, 70-75µm in diameter, valve face flat with areole 7-10 in 10µm, aranged in more or less wavy, incomplite rows, the size of areole decrease towards the valve margin, central annulus distinct, irregular, pseudonoduls large located on the valve face.
  • Florida Bay Paleo Project

  • Sample localities: