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| The '''Rhizaria''' |
The '''Rhizaria''' are a major line of ]s. They vary considerably in form, but for the most part they are ]s with filose, reticulose, or microtubule-supported pseudopods. Many produce shells or skeletons, which may be quite complex in structure; these make up the vast majority of protozoan fossils. The main groups of Rhizaria are the ], ], and ]ns, considered close relatives based on genetic studies; they may be regarded as an extension of the Cercozoa, which are already a heterogenous group defined mainly by genetics. | ||
| ⚫ | The name Rhizaria was introduced by ] in 2002, treated as an infrakingdom. Originally the ]s and ]s were included, but they do not appear to be close relatives of the other groups. | ||
| * The ], including most protozoa with filose pseudopods; | |||
| * The ], which produce chambered shells and have reticulose pseudopods; | |||
| * The ]ns, several groups with complex skeletons and microtubule-supported axopods | |||
| == References == | |||
| ⚫ | The name Rhizaria was introduced by ] as an infrakingdom. Originally |
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| * Sergey I. Nikolaev ''et al.'' (2004). The twilight of the Heliozoa and rise of the Rhizaria, an emerging supergroup of amoeboid eukaryotes. ''Proceedings of the National Academy of Sciences'' '''101''': 8066-8071. | |||
| ] | ] | ||
Revision as of 16:48, 23 August 2004
The Rhizaria are a major line of protists. They vary considerably in form, but for the most part they are amoeboids with filose, reticulose, or microtubule-supported pseudopods. Many produce shells or skeletons, which may be quite complex in structure; these make up the vast majority of protozoan fossils. The main groups of Rhizaria are the Cercozoa, Foraminifera, and radiolarians, considered close relatives based on genetic studies; they may be regarded as an extension of the Cercozoa, which are already a heterogenous group defined mainly by genetics.
The name Rhizaria was introduced by Thomas Cavalier-Smith in 2002, treated as an infrakingdom. Originally the centrohelids and apusomonads were included, but they do not appear to be close relatives of the other groups.
References
- Sergey I. Nikolaev et al. (2004). The twilight of the Heliozoa and rise of the Rhizaria, an emerging supergroup of amoeboid eukaryotes. Proceedings of the National Academy of Sciences 101: 8066-8071.