Rhizaria
Ammonia tepida, a foraminifer with fang prepare pseudopodia
The Rhizaria are a group of unicellular organisms that are provided to the eukaryotes ( organisms with nuclei ). They comprise about 12,000 species.
The classification of eukaryotes by Adl et al. 2005 introduces the Rhizaria as one of the six taxa of this domain. Some groups of Rhizaria, in particular the two largest groups, the foraminifera ( Foraminifera ) and radiolarians ( Radiolaria ), have developed fossil preservation enabled hard shells and are in the geological strata client ( stratigraphy ) as index fossils of great importance.
Features
All members of the Rhizaria have as a characteristic feature of fine pseudopodia, called pseudopodia. These can be simple or branched and over anastomoses linked. In some groups, there is also a stiffening of cytoskeletal microtubules, which the pseudopodia are formed spike- like and form filopodia.
The Chlorarachniophyta within the Cercozoa have chloroplasts and are thus capable of photosynthesis.
System
Adl et al. affiliated 2005 Rhizaria into five groups with no classic ranks.
- Cercozoa
- Haplosporidia
- Foraminifera ( Foraminifera )
- Gromia
- Radiolarians ( Radiolaria )
Pawlowski has 2008 Rhizaria taking into account the findings from the work of Adl et al. subdivided as follows:
Core Cercozoa ( Filosa )
Ascetosporea ( Haplosporida Paramyxida )
Foraminifera
Gromiida
Corallomyxa
Radiozoa