Visit us at

Diatoms of the United States is now known as Diatoms of North America.
This site has been redesigned and updated, and will be closing soon.


Krammer 2003      Category: Asymmetrical biraphid
TYPE SPECIES: Navicymbula pusilla Krammer




Image Credit: Marina Potapova

CLASS: Bacillariophyceae

  1. Asymmetry to apical axis slight
  2. Distal raphe ends dorsally deflected
  3. Striae lineate

The valve outline is very slightly asymmetric to the apical axis, valves are nearly naviculoid in appearance. The raphe is positioned in a nearly central position on valve. The distal raphe ends are deflected dorsally. Striae are lineate. Valves lack apical pore fields.

The genus is more closely allied with Navicula than Cymbella. Navicymbula pusilla, one of the brackish to saline taxa, is found in endorheic lakes of the Northern Great Plains.

Cite This Page:
Spaulding, S., and Edlund, M. (2008). Navicymbula. In Diatoms of the United States. Retrieved May 22, 2018, from

Contributor: Sarah Spaulding | Mark Edlund - December 2008