Nucleariid

Nucleariid
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Nucleariid".

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Nucleariids

Scientific classification

Domain:	Eukaryota
(unranked):	Opisthokonts
Phylum:	Choanozoa
Class:	Cristidiscoidea

The nucleariids are a small group of amoebae with filose pseudopods, known mostly from soils and freshwater. They are distinguished from the similar vampyrellids mainly by having mitochondria with discoid cristae. Genetic studies place them near the animals and fungi; some studies place them as a sister group to the fungi.¹

	Plantae

	Chromalveolata

Amoebozoa

Opisthokonts

	Choanozoa

	Animalia

	Nucleariids

	Fungi

The great kingdoms and their stem groups.²

Nucleariids are usually small, up to about 50 μm in size. Nuclearia and Vampyrellidium, which are respectively parasitic on and in algae, take the form of naked amorphous cells. The other genera, Rabdiophrys, Pinaciophora, and Pompholyxophrys, are freshwater forms with hollow siliceous scales or spines. These were formerly included among the heliozoa as the Rotosphaerida.

References

^ Steenkamp, E.T.; Wright, J.; Baldauf, S.L. (2006). "The Protistan Origins of Animals and Fungi". Molecular Biology and Evolution 23 (1): 93–106. doi:10.1093/molbev/msj011. PMID 16151185.
^ Phylogeny based on:
- Eichinger, L.; Pachebat, J.A.; Glöckner, G.; Rajandream, M.A.; Sucgang, R.; Berriman, M.; Song, J.; Olsen, R.; Szafranski, K.; Xu, Q.; Others, (2005). "The genome of the social amoeba Dictyostelium discoideum". Nature 435 (7038): 43-57. doi:10.1038/nature03481.
- Steenkamp, E.T.; Wright, J.; Baldauf, S.L. (2006). "The Protistan Origins of Animals and Fungi". Molecular Biology and Evolution 23 (1): 93-106. doi:10.1093/molbev/msj011.

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