Two bacterial isolates, designated strains 5420S-26 and 5516S-1, were recovered from air samples collected in Suwon, Korea. Cells of both strains were aerobic, Gram-negative, motile rods. Phylogenetically, these strains were positioned within the radius of the genus . 16S rRNA gene sequence analysis showed that the strains shared 97.3 % sequence similarity and had sequence similarities of 94.9–98.1 % with respect to type strains of species belonging to the genus . In DNA–DNA hybridization tests, the two strains showed <39 % relatedness with respect to strains of closely related species of the genus and 27 % relatedness to each other. Both strains contained Q-8 as the predominant isoprenoid quinone and possessed summed feature 3 (comprising C 7 and/or iso-C 2-OH) as the major fatty acid. Strain 5516S-1 was found to contain the fatty acid C (in small amounts), a feature that served to distinguish it from both 5420S-26 and recognized members of the genus . The DNA G+C contents of 5420S-26 and 5516S-1 were 67.8 and 66.6 mol%, respectively. Phylogenetic, phenotypic and chemotaxonomic data accumulated in this study revealed that 5420S-26 and 5516S-1 represent novel species of the genus , for which the names sp. nov. (type strain 5420S-26 =KACC 12632 =DSM 21312) and sp. nov. (type strain 5516S-1 =KACC 12599 =DSM 21313) are proposed, respectively.


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