gen. nov., sp. nov., a marine bacterium from coralline algae sp.

A Gram-stain-negative, non-spore-forming, aerobic, curved rod-shaped bacterium, designed strain R142, was isolated from a coralline algae sp. in the Beibu Gulf, China. Optimal growth occurred with 0-0.5 % (w/v) NaCl, at 25 °C and at pH 8. Global alignment based on 16S rRNA gene sequences indicated that strain R142 shared 93.8 % similarity with its closest type strain, KU14G. Phylogenetic analyses showed that strain R142 forms a distinct branch alongside KU41E, SW-11, KU14G, MEBiC06469 and SM-6. The major polar lipids of strain R142 were phosphatidylethanolamine and phosphatidylglycerol. The primary cellular fatty acids were C, Cω7, Cω7, C and C. The genome DNA G+C ratio was 56.4 mol%. The only detected respiratory quinone was ubiquinone 8. The low 16S rRNA gene sequence similarity and differences in cellular fatty acids readily distinguished strain R142 from all validly published type strains. Strain R142 is therefore suggested to represent a novel species of a new genus, for which the name gen. nov., sp. nov. is proposed. The type strain of is R142 (=MCCC 1K03816=KCTC 72138).