Chromalveolata

The division of living beings into systematics is a continuous subject of research. Different systematic classifications exist side by side and one after the other. The taxon treated here has become obsolete due to new research or is not part of the group systematics presented in the German-language Wikipedia.

Gephyrocapsa oceanica

The Chromalveolata were one of six groups of eukaryotes , i.e. living beings with cell nuclei that were classified according to the systematics of the eukaryotes by Adl u. a. 2005 gave. Above all, they include various photosynthetically active groups, which are commonly referred to as algae .

features

The Chromalveolata have plastids that originate from a secondary endosymbiosis with a representative of the Archaeplastida . This means that they have ingested a eukaryotic unicellular organism with plastids as endosymbionts and reduced the primary host to such an extent that only the plastid remained. In some groups, the plastids can be lost or reduced in a secondary manner. Some of these species can, in turn, tertiary regain plastids.

Systematics

The Chromalveolata were first described in 2005 by a working group around Sina Adl . It divided the chromium alveolata into four groups without classical ranks:

• Cryptophyceae
• Calcareous algae (Haptophyta)
• Stramenopiles (stramenopiles)
• Alveolata

In 2012, as part of a revision by the same working group, stramenopiles and alveolata were placed together with the rhizaria in the taxon Sar , and the chromalveolata were smashed in the process.

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. The Journal of Eukaryotic Microbiology 52 (5), 2005; Pages 399-451. PMID 16248873 . doi : 10.1111 / j.1550-7408.2005.00053.x