A Gram-stain-negative, aerobic, non-flagellated, and coccoid, ovoid or rod-shaped bacterium, designated JDTF-65T, was isolated from a tidal flat on the south-western sea in Republic of Korea. Strain JDTF-65T grew optimally at 25°C, at pH 7.0– 8.0 and in the presence of 2.0% (w/v) NaCl. Strain JDTF-65T exhibited 16S rRNA gene sequence similarities of 97.1–97.6% to the type strains of ‘Aliisedimentitalea scapharcae’, Phaeo-bacter gallaeciensis, Phaeobacter inhibens, Leisingera aqui-marina, Tropicibacter litoreus, Sulfitobacter pseudonitzschiae, and Pseudoseohaeicola caenipelagi. Phylogenetic trees based on 16S rRNA gene sequences showed that strain JDTF-65T forms an independent lineage within the radiation enclosed by the family Rhodobacteraceae. Strain JDTF-65T contained Q-10 as the predominant ubiquinone and C18:1 ω7c as the major fatty acid. The major polar lipids of strain JDTF-65T were phosphatidylcholine, phosphatidylethanolamine, phos-phatidylglycerol, one unidentified aminolipid, and one un-identified lipid. The DNA G+C content of strain JDTF-65T was 56.8 mol% and its DNA-DNA relatedness values with the type strains of the phylogenetically related species were 13– 27%. Differential phenotypic properties revealed that strain JDTF-65T is separated from representatives of some phylo-genetically related taxa. On the basis of the data presented, strain JDTF-65T represents a new genus and species within the family Rhodobacteraceae, for which the name Jindonia aestuariivivens gen. nov., sp. nov. is proposed. The type strain of Jindonia aestuariivivens is JDTF-65T (=KCTC 52564T =NBRC 112534T).
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