(Ehrenberg) Ralfs in Pritchard 1861      Category: Eunotioid
TYPE SPECIES: Amphicampa alata (Ehrenberg) Ralfs in Pritchard




CLASS: Bacillariophyceae
  ORDER: Eunotiales
    FAMILY: Eunotiaceae

  1. Valve asymmetrical to the apical axis, symmetrical to transapical axis
  2. Dorsal and ventral margins distinctly undulate
  3. Raphe short, restricted to the valve ends

Amphicampa is asymmetrical to the apical axis and symmetrical to transapical axis. Both the dorsal and ventral margins of the valves are undulate. The raphe is very short and may only be visible through the thickening of the helictoglossa.

A single species, A. eruca Ehrenberg, is found in circumneutral to alkaline waters in the midwest and western United States. This species has also been found in subfossil pothole deposits in Iowa (Julius, unpublished data).

Cite This Page:
Spaulding, S., and Edlund, M. (2009). Amphicampa. In Diatoms of the United States. Retrieved September 05, 2015, from

Contributor: Sarah Spaulding | Mark Edlund - January 2009