Cryomonadida
| Cryomonadida | ||||||||||||
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| Scientific name | ||||||||||||
| Cryomonadida | ||||||||||||
| Cavalier-Smith , 1993 |
The Cryomonadida are a group of heterotrophic protists belonging to the Cercozoa .
features
The Cryomonadida are single-cell organisms that are surrounded by a multilayered shell made of organic material. They have two flagella of unequal length and a single nucleus with a conspicuous nucleolus . The transition zone of the flagella has a helix; axial rods in the region of the flagella are absent. They have a lateral cell mouth (cytostome), from which the pseudopodia are formed. Your mitochondria have tubular cristae. The representatives have long extrusomes .
Systematics
The Cryomonadida were established in 1993 for the genus Cryothecomonas . Adl et al. did not lead the group in their system in 2005, but instead placed the genus as incertae sedis with the Cercozoa . It turned out, however, that besides Cryothecomonas also other genera and previously undescribed environmental DNA samples belong to this group. Therefore, the Cryomonadida von Pawlowski 2008 are listed as one of the groups of the core Cercozoa.
Within the Cercozoa, the Ebriacea are the sister group of the Cryomonadida, and Pseudodifflugia is also closely related.
The following genera are included in the group:
supporting documents
- Thomas Cavalier-Smith: The Protozoan Phylum Opalozoa . Journal of Eukaryotic Microbiology, Volume 40, 1993, pp. 609-615.
- Mona Hoppenrath, Brian S. Leander: Ebriid Phylogeny and the Expansion of the Cercozoa . Protist, Volume 157, 2006, pp. 279-290, doi : 10.1016 / j.protis.2006.03.002
Individual evidence
- ↑ Sina M. Adl et al .: The New Higher Level Classification of Eukaryotes with Emphasis on the Taxonomy of Protists. The Journal of Eukaryotic Microbiology, Vol. 52, 2005, pp. 399-451. doi : 10.1111 / j.1550-7408.2005.00053.x .
- ^ Jan Pawlowski: The twilight of Sarcodina: a molecular perspective on the polyphyletic origin of amoeboid protists . Protistology, Vol. 5, 2008, pp. 281-302. (pdf, 570 kB)
- ↑ a b c Mona Hoppenrath, Brian S. Leander: Ebriid Phylogeny and the Expansion of the Cercozoa . Protist, Volume 157, 2006, pp. 279-290, doi : 10.1016 / j.protis.2006.03.002
- ^ SI Nikolaev, C. Berney, J. Fahrni, AP Mylnikov, VV Aleshin, NB Petrov, J. Pawlowski: Gymnophrys cometa and Lecythium sp. are core Cercozoa: Evolutionary implications . Acta Protozoologica, Volume 42, 2003, pp. 183-190. (pdf; 121 kB) ( page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.
