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Diatoms of the United States is now known as Diatoms of North America.
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Lange-Bertalot, Witkowski and Metzeltin 1996      Category: Symmetrical biraphid
TYPE SPECIES: Hippodonta lueneburgensis (Grunow) Lange-Bertalot, Witkowski and Metzeltin




Image Credit: Marina Potapova

CLASS: Bacillariophyceae
  ORDER: Naviculales

  1. Striae distinct, broad
  2. Striae uniseriate or biseriate
  3. Valve termini with thickened silica

Species in Hippodonta possess thick, heavily silicified valves. Valves are generally lanceolate in valve outline with variously shaped poles. The striae are distinct, broad and may be uni-seriate or biseriate. The valve termini are thickened bands of silica.The raphe is straight and the proximal raphe ends are dilated. Two chloroplasts are present in living cells.

Hippodonta includes the former Navicula capitata Ehrenberg, N. hungarica Grunow and allies. Species of Hippodonta grow in a wide range of benthic habitats, particularly in mid to higher salinity inland and coastal waters.

Cite This Page:
Spaulding, S., and Edlund, M. (2008). Hippodonta. In Diatoms of the United States. Retrieved May 20, 2018, from

Contributor: Sarah Spaulding | Mark Edlund - December 2008
Reviewer: Sam Rushforth - May 2010