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Haloferax larsenii sp. nov., an extremely halophilic archaeon from a solar saltern

¹ College of Life Sciences, Zhejiang University, Hangzhou 310058, People's Republic of China
² Institute of Microbiology, Chinese Academy of Sciences, Beijing 100080, People's Republic of China
³ Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, People's Republic of China
⁴ Institute of Life Sciences and the Moshe Shilo Minerva Centre for Marine Biogeochemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel

Correspondence
Min Wu
wumin{at}zju.edu.cn

Three strains of Gram-negative, aerobic, neutrophilic, extremely halophilic archaea, designated ZJ206^T, ZJ203 and ZJ204, were isolated from a solar saltern in Zhe-Jiang Province, China. Phenotypically and on the basis of 16S rRNA gene sequences, the strains were very similar. Comparative 16S rRNA gene analysis revealed 96.4–97.4 % sequence similarity to members of the genus Haloferax. The major polar lipids were C₂₀C₂₀ derivatives of phosphatidylglycerol, phosphatidylglycerol phosphate methyl ester, diglycosyl glycerol diether and sulfated diglycosyl diether. The DNA G+C content of strain ZJ206^T was 62.2 mol%. The results of DNA–DNA hybridizations and physiological and biochemical tests allowed genotypic and phenotypic differentiation of the isolates from closely related species. Therefore the isolates should be classified as members of a novel species, for which the name Haloferax larsenii sp. nov. is proposed. The type strain is ZJ206^T (=CGMCC 1.5347^T=JCM 13917^T).

Phase-contrast photomicrographs and transmission electron photomicrographs of strain ZJ206^T are available as supplementary figures in IJSEM Online.

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