Eopharyngia

from Wikipedia, the free encyclopedia

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.

The Eopharyngia are a taxon of protists that was added to the Excavata . They comprised most of the Fornicata , their best-known representatives were the Giardia ( Giardia ).

features

The eopharyngia are a molecular-genetic defined taxon, there are hardly any clearly apomorphic characteristics to be found.

The kinetids usually have four, rarely three or two kinetosomes and flagella per kinetid. They usually have a cytopharynx or a channel-shaped structure through which food reaches the cytostome . Dictyosomes and structures homologous to the mitochondria are only temporarily recognizable or generally inconspicuous.

Systematics

The eopharyngia comprised almost all taxa of the Fornicata, with the exception of their sister taxon, the genus Carpediemonas and the monotypic genus Dysnectes, which was only newly described in 2007 and understood as incertae sedis .

In 2005, Adl et al. the eopharyngia as follows:

With the revision of the Fornicata by Adl et al. In 2012 the two sub-taxa were placed directly within the Fornicata, next to a third group, the Carpediemonas-like organisms , which included both Carpediemonas such as Dysnectes as well as genera that have now been newly described. The eopharyngia were omitted.

proof

Footnotes directly behind a statement cover the individual statement, footnotes directly behind a punctuation mark the entire preceding sentence. Footnotes after a space refer to the entire preceding paragraph.

  1. ^ Alastair GB Simpson: Cytoskeletal organization, phylogenetic affinities and systematics in the contentious taxon Excavata (Eukaryota) in: International Journal of Systematic and Evolutionary Microbiology (2003), 53, 1759-1777
  2. ↑ a b c Sina M. Adl, Alastair GB Simpson, Mark A. Farmer, Robert A. Andersen, O. Roger Anderson, John A. Barta, Samual S. Bowser, Guy Brugerolle, 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; Page 439
  3. ↑ Adl, SM, Simpson, AGB, Lane, CE, Lukeš, J., Bass, D., Bowser, SS, Brown, MW, Burki, F., Dunthorn, M., Hampl, V., Heiss, A. , Hoppenrath, M., Lara, E., le Gall, L., Lynn, DH, McManus, H., Mitchell, EAD, Mozley-Stanridge, SE, Parfrey, LW, Pawlowski, J., Rueckert, S., Shadwick, L., Schoch, CL, Smirnov, A. and Spiegel, FW: The Revised Classification of Eukaryotes. Journal of Eukaryotic Microbiology , 59: 429-514, 2012, PDF Online