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Korarchaeota
In taxonomy, the Korarchaeota are a phylum of the Archaea.〔See the NCBI (webpage on Korarchaeota ). Data extracted from the (【引用サイトリンク】 title=NCBI taxonomy resources )〕 The name is derived from the Greek noun koros or kore, meaning ‘‘young man’’ or ‘‘young woman,’’ and the Greek adjective archaios which means ‘‘ancient.’’〔James G. Elkins et al., A korarchaeal genome reveals insights into the evolution of the Archaea, Harvard University, PNAS, June 10, 2008, Vol. 105, no. 23, www.pnas.org/cgi/doi/10.1073/pnas.0801980105〕 They are also known as Xenarchaeota.
Analysis of their 16S rRNA gene sequences suggests that they are a deeply branching lineage that does not belong to the main archaeal groups, Crenarchaeota and Euryarchaeota. Analysis of the genome of one korarchaeote that was enriched from a mixed culture revealed a number of both Crenarchaeota- and Euryarchaeota-like features and supports the hypothesis of a deep-branching ancestry.
==Ecology==
The Korarchaeota have only been found in high temperature hydrothermal environments. They appear to have diversified at different phylogenetic levels according to temperature, salinity (freshwater or seawater), and/or geography. Korarchaeota have been found in nature in only low abundance.〔〔Auchtung Thomas A. (2007) Ecology of the hydrothermal candidate archaeal
division, ''Korarchaeota''. PhD thesis, Harvard University.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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