Decussata

(Patrick) Lange-Bertalot 2000      Category: Symmetrical biraphid
TYPE SPECIES: Decussata placenta (Patrick) Lange-Bertalot and Metzeltin in Lange-Bertalot

Cymbopleura

 

Delicata

Image Credit: Pat Kociolek

CLASS: Bacillariophyceae
  ORDER: Naviculales
    FAMILY:

  1. Valves linear to linear-lanceolate
  2. Striae punctate
  3. Striae decussate

Decussata valves are linear to linear-lanceolate, with slightly rostrate ends. The striae are punctate, comprised of distinct, round areolae. The striae are decussate, meaning they appear to be organized into rows - a transapical row and two oblique rows.

Decussata includes two species, including the former Navicula placenta. Decussata placenta grows in low nutrient, slightly acidic seeps in Iowa. It is also known from moss and aerophilic habitats.

Cite This Page:
Spaulding, S., and Edlund, M. (2008). Decussata. In Diatoms of the United States. Retrieved August 29, 2015, from http://westerndiatoms.colorado.edu/taxa/genus/Decussata

Contributor: Sarah Spaulding | Mark Edlund - December 2008

 

April 17th, 2012 - Correction of authorship

The authorship of the genus Decussata was previously given as (Patrick) Lange-Bertalot. It was corrected to (Patrick) Lange-Bertalot and Metzeltin in Lange-Bertalot. - S. Spaulding