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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)

Achnanthes caledonica

Achnanthes caledonica

Krammer, K. and Lange-Bertalot, H. (1991). Baccilariophyceae: Achnanthaceae. in: Süßwasserflora von Mitteleuropa (H. Ettl, G. Gärtner, J. Gerloff, H. Heynig & D. Mollenhauer, eds), 2(4), pp. 60; 316-317 [t.34:1-6]
Achnanthes microcephala f. scotica Carter in Carter & Bailey-Watts 1981; Achnanthes minutissima var. scotica (Carter) Lange-Bertalot in Lange-Bertalot & Krammer 1989; Achnanthes scotica (Carter) Lange-Bertalot 1993 (invalid, homonym for Achnanthes scotica Flower & Jones 1989)
Valve is linear to linear-lanceolate with rostrate to capitate ends; striae are slightly radiate from the centre to very slightly convergent at the ends; axial area is slightly expanded at the centre, narrowing to valve ends; raphe is simple; valve in girdle view is reflexed; length is 10-35µm, breadth is 2.7-3.8µm
some specimens recorded have slightly longer lengths, smaller breadths than as described
  • Dosing Project
  • CERP
  • Transect Project

  • Sample localities:
  • Water Conservation Areas (WCAs)