1887

Abstract

Strains 1.15.5, 2.27.5, 5.24.4 and 6.14.5 were isolated from a solar saltern. They have flattened, rod-shaped cells and are aerobic, extremely halophilic members of the domain and family . Cells stained Gram-negative and grew optimally in media around neutral pH and containing 20–24 % (w/v) (strains 1.15.5 and 2.27.5) or 22–24 % (w/v) (5.24.4 and 6.14.5) salts. Mg was not required. The DNA G+C contents of these isolates were all close to 58 mol%, and DNA–DNA cross-hybridization showed a mean relatedness of 77 %. Their 16S rRNA gene sequences differed by no more than 1.6 % from each other. Phylogenetic tree reconstructions with other recognized members of the indicated that they formed a distinct clade, with the closest relative being (86.6–87.6 % 16S rRNA gene sequence similarity to the type strain). The only major polar lipid of all four isolates was the sulfated diglycosyl diether lipid S-DGD-1. By phase-contrast microscopy, the long, flattened cells of these strains often displayed a ‘wing-like’ shape. The phenotypic and phylogenetic data support the placement of these isolates into a novel species in a new genus within the , for which we propose the name gen. nov., sp. nov. The type strain of is 1.15.5 (=JCM 14355 =CECT 7525 =DSM 18729), with the additional reference strains 2.27.5 (=JCM 14356 =DSM 18671), 5.24.4 (=JCM 14357 =DSM 18673) and 6.14.5 (=JCM 14358 =DSM 18692).

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2010-05-01
2020-01-27
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