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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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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 curvatulus

Janisch in A. Schmidt et al.
Witkowski et al. (2000). Iconographia Diatomologica (Vol.VII). Diatom flora of marine coast. Part 1. pg.20, Pl.6:2;
Coscinodiscus curvatulus var. subocellata (Grunow), Actinocyclus subocellatus (Rattay)
Ecological Preference:
Valves circular, 20-100µm in diameter, valve face slightly depressed in the middle with areola rows slightly curved, 8-10 in 10µm, decrease in size towards the margin. Central annulus irregular in shape, small irregular pseudonodulus positioned near the valve margin.
  • Southeast Florida Coastal Mangroves
  • Florida Bay Paleo Project

  • Sample localities: