Eocercomonas ramosa
| Eocercomonas ramosa | ||||||||||||
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| Scientific name of the genus | ||||||||||||
| Eocercomonas | ||||||||||||
| Karpov, Bass, Mylnikov & Cavalier-Smith, 2006 | ||||||||||||
| Scientific name of the species | ||||||||||||
| Eocercomonas ramosa | ||||||||||||
| Karpov , Bass , Mylnikov & Cavalier-Smith , 2006 |
Eocercomonas ramosa is a heterotrophic living flagellate from the group of Cercomonadida . It is the only species in the genus Eocercomonas .
Characteristics of the genus
They are sliding, usually spindle-shaped cercomonades , with the rear flagella pointing backwards and dragging. The genus differs from the closely related genera Cercomonas and Paracercomonas by the following features: it has a dorsal, posterior microtubule band and a nuclear, fibrous, striped root. It distinguishes from Cercomonas the lack of a nucleus enlargement towards the centrioles , cartwheels are missing on both centrioles , and both centrioles have a proximal transverse plate. A long, fibrous, striped root extends from the anterior centriole to the nucleus. The mitochondria have cristae in the form of round tubules. The genus is also defined by three diagnostic sequence segments in the 18S rRNA.
Features of the species
Eocercomonas ramosa forms sliding, spindle-shaped cells 5 to 15 micrometers in length. The proximal part of the anterior flagella is surrounded by a cytoplasmic sheath. It is usually more than twice as long as the cell body when it is sliding. The posterior flagella is usually not visible and only protrudes slightly beyond the cell. The contractile vacuole is located in the front of the cell. In the food intake stage they form highly branched, very slim pseudopodia . They can join together to form consortia. In the flagellum apparatus, the dorsal, anterior root attaches laterally to the anterior centriole.
distribution
The strain on which the first description is based was taken from a freshwater lake in Antarctica.
Systematics
The genus Eocercomonas was separated from the genus Cercomonas in 2006 and forms its sister group :
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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