RT Journal Article SR Electronic(1) A1 Choi, Won-Chan A1 Kang, So-Jung A1 Jung, Yong-Taek A1 Oh, Tae-Kwang A1 Yoon, Jung-HoonYR 2011 T1 Oceanisphaera ostreae sp. nov., isolated from seawater of an oyster farm, and emended description of the genus Oceanisphaera Romanenko et al. 2003 JF International Journal of Systematic and Evolutionary Microbiology, VO 61 IS 12 SP 2880 OP 2884 DO https://doi.org/10.1099/ijs.0.029496-0 PB Microbiology Society, SN 1466-5034, AB A Gram-stain-negative, motile, non-spore-forming and short rod- or rod-shaped bacterial strain, T-w6T, was isolated from seawater of an oyster farm in the South Sea, Korea. Strain T-w6T grew optimally at 25 °C and in the presence of 2 % (w/v) NaCl. Phylogenetic analyses based on 16S rRNA gene sequences revealed that strain T-w6T joined the cluster comprising Oceanisphaera species with a bootstrap resampling value of 90.8 %, and this cluster joined the clade comprising members of the genera Oceanimonas and Zobellella with a bootstrap resampling value of 100 %. Strain T-w6T exhibited 16S rRNA gene sequence similarity of 95.9 and 96.6 % to the type strains of Oceanisphaera litoralis and Oceanisphaera donghaensis, respectively. Strain T-w6T and the type strains of Oceanisphaera litoralis and Oceanisphaera donghaensis had Q-8 as the predominant ubiquinone and iso-C15 : 0 2-OH and/or C16 : 1ω7c, C18 : 1ω7c and C16 : 0 as the major fatty acids. The major polar lipids were phosphatidylglycerol and phosphatidylethanolamine. The DNA G+C content of strain T-w6T was 56.6 mol%. Mean DNA–DNA relatedness of strain T-w6T with Oceanisphaera litoralis DSM 15406T and Oceanisphaera donghaensis KCTC 12522T was 13 and 10 %, respectively. Phenotypic properties of strain T-w6T demonstrated that this strain could be distinguished from the other Oceanisphaera species. On the basis of the data presented, strain T-w6T is considered to represent a novel species of the genus Oceanisphaera, for which the name Oceanisphaera ostreae sp. nov. is proposed; the type strain is T-w6T ( = KCTC 23422T  = CCUG 60525T). An emended description of the genus Oceanisphaera is also presented., UL https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/ijs.0.029496-0