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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 cf. minutissima gracillima

Achnanthes cf. minutissima gracillima

(Meister) Lange-Bertalot in Krammer & Lange-Bertalot
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. 314-315 [t.33:2,4]
Microneis gracillima Meister 1912; Achnanthes microcephala var. gracillima (Meister) Cleve-Euler 1953; Achnanthes microcephala Kützing sensu auct. nonnull. (excl. lectotype)
Valve is linear to linear-lanceolate, the smallest specimens becoming elliptical-lanceolate, with rounded ends (more or less capitate in larger specimens); striae are less conspicuously radial on the raphe valve compared to other varieties, parallel on the pseudoraphe valve; length is 8-44µm, breadth is 3.4-4.5µm; striae count is 22-25 in 10µm
  • Dosing Project

  • Sample localities:
  • Shark River Slough (SRS)