Ehrenberg 1830      Category: Araphid
TYPE SPECIES: Synedra ulna (Nitzsch) Ehrenberg




CLASS: Fragilariophyceae
  ORDER: Fragilariales
    FAMILY: Fragilariaceae

  1. Cells robust, linear to lanceolate with rounded to capitate ends
  2. Striae parallel
  3. Apical porefield present at each pole
  4. Rimoportula present near each apex

Frustules are robust and typically needle-like. Cells typically form radiate colonies with cells attached by mucilage pads.

Synedra ulna was recently separated, with many other freshwater taxa, and is now considered to reside in the genus Ulnaria (Compere 2001).

Cite This Page:
Spaulding, S., and Edlund, M. (2008). Synedra. In Diatoms of the United States. Retrieved October 09, 2015, from

Contributor: Sarah Spaulding | Mark Edlund - December 2008