A Gram-negative, pleomorphic, extremely halophilic archaeon, designated strain XH-70, was isolated from the saline Lake Xilinhot, in Inner Mongolia, China. It formed small (0.9–1.5 mm), red-pigmented, elevated colonies on agar medium. The strain required at least 2.5 M NaCl and 5 mM Mg for growth. The 16S rRNA gene sequence analysis indicated that strain XH-70 belongs to the family , showing 99.5 % similarity to the type strain of and 94.7 and 94.6 % similarity, respectively, to the type strains of and . Polar lipid analysis supported the placement of strain XH-70 in the genus . DNA–DNA hybridization studies (32 % with CGMCC 1.4248), as well as biochemical and physiological characterization, allowed strain XH-70 to be differentiated from . A novel species, sp. nov., is therefore proposed to accommodate this strain. The type strain is XH-70 (=CGMCC 1.6204=DSM 18193=JCM 13892).


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