Kufferath 1956      Category: Symmetrical biraphid
TYPE SPECIES: Capartogramma jeanii Kufferath




Image Credit: Marina Potapova

CLASS: Bacillariophyceae
  ORDER: Naviculales

  1. Central region X-shaped
  2. Pseudosepta present
  3. Axial area narrow
  4. Striae uniseriate, punctate

Capartogramma is characterized by a very distinctive “x-shaped” thickening of silica near the central part of the valve. Frustules are generally lanceolate in valve outline. Pseudosepta are present at the valve apices. The raphe is positioned within a narrow axial area. Striae are uniseriate and punctate.

Capartogramma is monotypic in North America (C. crucicula [Grunow ex Cleve] Ross). This species is found in rivers of varying conductance in the eastern and southern US. It is also common in tropical areas, particularly oceanic islands.

Cite This Page:
Spaulding, S., and Edlund, M. (2009). Capartogramma. In Diatoms of the United States. Retrieved April 23, 2018, from

Contributor: Sarah Spaulding | Mark Edlund - January 2009
Reviewer: Sam Rushforth - April 2010