gen. nov., sp. nov., a novel bacterium within the family .

A novel aerobic, Gram-negative bacterial strain, RR3-28, was isolated from a seawater recirculating aquaculture system in Busan, Republic of Korea. Cells were rod-shaped, non-motile, oxidase-positive, catalase-negative and grew optimally at 25-30 °C, pH 8.5 and 3 % (w/v) NaCl. Based on the results of phylogenetic analysis, strain RR3-28 was most closely related to X9-2-2 within the family with 95.97 % 16S rRNA gene sequence similarity. The major cellular fatty acids were summed feature 8 (Cω7 and/or Cω6, 71.1 %) and 11-methyl Cω7 (14.4 %). The major polar lipids were phosphatidylglycerol, phosphatidylethanolamine, phosphatidylmonomethylethanolamine, phosphatidylcholine and unidentified aminolipids. The predominant quinone was ubiquinone Q-10 and the DNA G+C content was 58.6 mol%. On the basis of its phenotypic and genotypic characteristics, strain RR3-28 represents a novel genus and species belonging to the family , for which the name gen. nov., sp. nov. is proposed. The type strain of the species is RR3-28 (=KCTC 52649=DSM 107947).