Giardiinae

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Giardiinae
Giardia intestinalis, cyst (left) and adults

Giardia intestinalis , cyst (left) and adults

Systematics
Classification : Creature
Domain : Eukaryotes (eukaryota)
without rank: Excavata
without rank: Fornicata
without rank: Diplomonadida
without rank: Giardiinae
Scientific name
Giardiinae
Kulda & Nohynkova , 1978

The Giardiinae are a subgroup of unicellular flagellates of the Diplomonadida . This includes 44 species in three genera, all of which live parasitically in vertebrates. Giardia intestinalis , the causative agent of Giardiasis, is of particular importance for humans .

Features and way of life

A distinguishing (diagnostic) feature from the sister group, the Hexamitinae , is the lack of a cell mouth . A flagella emerges from each kinetide at the rear end , which previously runs through the cell along its entire length in the cytoplasm .

All species of the Giardiinae are parasites and live as endobionts in amphibians , rodents , birds and mammals .

Systematics

The group was first described in 1978 as a subfamily of a family Hexamitidae by Eva Nohynkova and Jaroslav Kulda . Adl et al. lead them - like all taxa - as without rank, but place them directly as a subgroup of the Diplomonadida without the superordinate Hexamitidae. The internal system is undisputed, the group comprises three genera with a total of 44 species, of which 41 are Giardia species:

proof

  1. ^ A b c Guy Brugerolle, John J. Lee: Order Diplomonadida , in: John J. Lee, GF Leedale, P. Bradbury (Eds.): An Illustrated Guide to the Protozoa . tape 2 . Allen, Lawrence 2000, ISBN 1-891276-23-9 , pp. 1132-1133 .
  2. ↑ See the pages on Giardia Kunstler and Octomitus Prowazek , in: The Tree of Life Web Project, http://tolweb.org/ , Tree of Life Web Project, 2008, accessed on October 22, 2009
  3. ↑ 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; Pp. 399-451, PMID 16248873 . doi : 10.1111 / j.1550-7408.2005.00053.x