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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)

Hantzschia cf. graciosa ssp.neotropica

Hantzschia cf. graciosa ssp.neotropica

Metzeltin & Lange-Bertalot
Metzeltin & Lange-Bertalot (1998). Tropical Diatoms of South America. in: Iconographia Diatomologica 5, pp. pp. 133-134; 646-647 [t.206:2-5]
Hantzschia graciosa Lange-Bertalot 1993; 15 likely Hantzschia amphioxys var. gracilis Hustedt in Lange-Bertalot 1993
Valve dimensions (length-to-width) and striae features are similar to Hantzschia graciosa Lange-Bertalot; the neotropis clan has more narrowly-spaced striae; fibulae are irregular, irregularly placed (11-15 in 10µm); length is 170-200µm, breadth is 10-11µm; striae count is 17-18 in 10µm
specimen recorded is slightly larger than described
  • Transect Project

  • Sample localities:
  • Shark River Slough (SRS)