Phaeothamniophyceae
| Phaeothamniophyceae | ||||||||||||
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| Scientific name | ||||||||||||
| Phaeothamniophyceae | ||||||||||||
| Andersen & Bailey , 1998 |
The Phaeothamniophyceae are a taxon of unicellular or thread-like brown algae, which are counted among the stramenopiles .
features
The species are thread-like, capsoid, palmelloid or coccoid. The cells are surrounded by a one- or two-part cell wall. The chloroplast has a belt lamella. The outer membrane of this plastid is connected directly to the outer membrane of the nuclear envelope via the endoplasmic reticulum . The DNA of their plastids ( chloroplast DNA ) has a genophore of the ring type. The cells have eye spots. The plastid pigments are: chlorophyll a and c, fucoxanthin , heteroxanthin , diatoxanthin and diadinoxanthin .
Swarming cells have two flagella . The one pointing forward has three-part hair, the one behind not. The cells have four microtubules - kinetosome roots, but no rhizoplast .
Systematics
Within the group, a distinction is made between two sub-taxa based on molecular biological characteristics:
- Phaeothamniales Bourrelly
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Pleurochloridales Ettl
- Pleurochloridellaceae
literature
- Sina M. Adl, Alastair GB Simpson, Mark A. Farmer, Robert A. Andersen, O. Roger Anderson, John A. Barta, Samual S. Bowser, Guy Bragerolle, Robert A. Fensome, Suzanne Fredericq, Timothy Y. James, Sergei Karpov, Paul Kugrens, John Krug, Christopher E. Lane, Louise A. Lewis, Jean Lodge, Denis H. Lynn, David G. Mann, Richard M. McCourt, Leonel Mendoza, Øjvind Moestrup, Sharon E. Mozley-Standridge, Thomas A. Nerad, Carol A. Shearer, Alexey V. Smirnov, Frederick W. Spiegel, Max FJR Taylor: The New Higher Level Classification of Eukaryotes with Emphasis on the Taxonomy of Protists. In: The Journal of Eukaryotic Microbiology. 52 (5), 2005; Pages 399-451. doi : 10.1111 / j.1550-7408.2005.00053.x .