A bacterial strain, designated MS4, was isolated from soil in the Ryukyu Archipelago, Japan. The bacterium grew with 3-methyl sulfolane as sole sulfur source. Phylogenetic analysis based on 16S rRNA gene sequences suggested that strain MS4 belonged to the genus ; it was closely related to the type strains of and (16S rRNA gene sequence similarities of 98.2 and 96.7 %, respectively). Strain MS4 was a Gram-negative, non-motile, rod-shaped, aerobic bacterium. The major respiratory quinone was ubiquinone-10 and the predominant cellular fatty acid was C 7. The DNA G+C content was 66.4 mol%. Based on phylogenetic and phenotypic traits, it was concluded that the organism represents a novel species in the genus for which the name sp. nov. is proposed; the type strain is MS4 (=NBRC 102122=DSM 18801).


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