Cercomonas longicauda
| Cercomonas longicauda | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Cercomonas longicauda | ||||||||||||
| Dujardin |
Cercomonas longicauda is a heterotrophic living flagellate from the group of Cercomonadida .
features
The protozoa are 8 to 12 micrometers long and 3 to 7 micrometers wide. The rear end of the cell is drawn out long. The front flagellum is 10 to 15 micrometers long, the rear 14 to 15 micrometers. They have one or two contractile vacuoles . There are no cysts . The plasmodia are unbranched. As Extrusomen come osmiophilic body before.
The type culture is described by Karpov et al. described as follows: The cells are 8 to 10 micrometers long and often amoeboid . The posterior flagella is firmly attached to the cell body and extends about one body length beyond the cell. Their total length is around 15 to 20 micrometers. It is always clearly visible in the sliding movement of the cell. The anterior flagella is around twice as long as the cell, mostly 15 to 17 micrometers. Cysts are spherical and smooth-walled. There is a contractile vacuole. The pseudopodia are broad, flat and lobed. The cell nucleus is located in the front of the cell. The plasmodia are compact and rounded.
Diet and Occurrence
They feed on bacteria and take up dissolved substances. They occur in feces and over digested sludge .
Systematics
Cercomonas longicauda is the type species of the genus Cercomonas . Since the first description of Dujardin in 1841, the name has been applied to morphologically very different forms; a type for the species was only created. For the division of the genus Cercomonas into several genera, however, the exact assignment of the type species to one of the groups was important, since the Cercomonas name remains. Therefore, a neotype was defined for the genus in 2006 after a 2004 neotyping was deemed invalid.
supporting documents
- Serguei A. Karpov, David Bass, Alexander P. Mylnikov, Thomas Cavalier-Smith: Molecular Phylogeny of Cercomonadidae and Kinetid Patterns of Cercomonas and Eocercomonas gen. Nov. (Cercomonadida, Cercozoa) . Protist, Volume 157, 2006, pp. 125-158, doi : 10.1016 / j.protis.2006.01.001
- Alexander P. Myl'nikov, Serguei A. Karpov: Review of diversity and taxonomy of cercomonads. In: Protistology. Vol. 3, No. 4, 2004, ISSN 1680-0826 , pp. 201-217, online (PDF; 249 kB) .
Individual evidence
- ↑ Heinz Streble , Dieter Krauter : Life in the water drop. Microflora and microfauna of freshwater. An identification book. 10th edition. Kosmos, Stuttgart 2006, ISBN 3-440-10807-4 , p. 224.