Nucleohelea
Nucleohelea | ||||||||||||
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![]() Wagnerella borealis |
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Systematics | ||||||||||||
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Scientific name | ||||||||||||
Nucleohelea | ||||||||||||
Cavalier-Smith , 1993 |
The nucleohelea are a group of heterotrophic protists that were systematically regarded as sun animals for a long time, but are now part of the Cercozoa .
features
The nucleohelea are unicellular amoeboid organisms. Their characteristic features are an amorphous centrosome that lies against the nuclear envelope (axoplast); Mitochondria with tubular cristae; their axopods ( pseudopodia ) are reinforced by microtubules .
Systematics
Because of their morphology, the representatives of the nucleohelea were placed among the sun animals earlier . However, molecular genetic studies showed that they belong to the Cercozoa . Today they form part of the core Cercozoa .
The nucleohelea comprise two groups:
- Clathrulinidae (= Desmothoracida)
- Gymnosphaerida
There are 160 to 180 described species, the total number is estimated at around 200.
supporting documents
- 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 .
Individual evidence
- ^ 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)
- ↑ Adl, Sina M., Leander, Brian S., Simpson, Alastair GB, Archibald, John M., Anderson, O. Roger., Bass, David, Bowser, Samuel S., Brugerolle, Guy, Farmer, Mark A. , Karpov, Sergey, Kolisko, Martin, Lane, Christopher E., Lodge, Deborah J., Mann, David G., Meisterfeld, Ralf, Mendoza, Leonel, Moestrup, Øjvind, Mozley-Standridge, Sharon E., Smirnov, Alexey V. and Spiegel, Frederick: Diversity, Nomenclature, and Taxonomy of Protists. Systematic Biology, Vol. 56, 2007, pp. 684-689.