Decussata
(Patrick) Lange-Bertalot 2000 Category: Symmetrical biraphid
TYPE SPECIES: Decussata placenta (Patrick) Lange-Bertalot & Metzeltin in Lange-Bertalot
CLASS: Bacillariophyceae
ORDER: Naviculales
FAMILY:
- Striae punctate
- Striae appear to form an "X" pattern
- Valves linear to linear-lanceolate
Decussata valves are linear to linear-lanceolate, with slightly rostrate ends. The striae are punctate, comprised of evident areolae which cross at an oblique angle, forming a characteristic "X" pattern.
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. (2009). Decussata. In Diatoms of the United States. Retrieved May 23, 2013, from http://westerndiatoms.colorado.edu/taxa/genus/Decussata
Contributor: Sarah Spaulding | Mark Edlund - January 2009
Reviewer: Sam Rushforth
Citations
Edlund, M.B., Brant, L.A., Levkov, Z. and Nakov, T. (2006). An emended description of Decussata (Patrick) Lange-Bertalot & Metzeltin that includes protoplast organization and detailed valve and cingulum ultrastructure. Diatom Research 21: 269-280.
Lange-Bertalot, H. (2000). Transfer to the generic rank of Decussata Patrick as a subgenus of Navicula Bory. Iconographia Diatomologica 9: 670-673.
Lange-Bertalot, H. (2001). Navicula sensu stricto, 10 genera separated from Navicula sensu lato, Frustulia. Diatoms of Europe 2: 1-526.
Patrick, R.M. and Reimer, C.W. (1966). The Diatoms of the United States exclusive of Alaska and Hawaii, V. 1. Monographs of the Academy of Natural Sciences of Philadelphia 13.
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 & Metzeltin in Lange-Bertalot. S. Spaulding