sp. nov., isolated from a marine alga [ (L.) Gaillon].

A novel bacterial strain, C3212, was isolated from a marine alga collected from the sea shore of Yantai, China. The strain was Gram-stain-negative, rod-shaped, aerobic, non-motile, and oxidase- and catalase-positive. Growth was observed at 8-37 °C (optimum, 28 °C), at pH 6.0-9.0 (optimum, pH 7.0) and in the presence of 1.0-7.0 % (w/v) NaCl (optimum, 4.0 %). The major respiratory quinone was ubiquinone-8 (Q-8). The polar lipids of strain C3212 consisted of diphosphatidylglycerol (cardiolipin), phosphatidylglycerol, phosphatidylethanolamine, an unidentified aminophospholipid, an unidentified phospholipid and an unidentified polar lipid. The major fatty acids were Cω and/or Cω, and Cω and/or Cω. The DNA G+C content of strain C3212 was 44.3 mol%. Phylogenetic analysis based on 16S rRNA gene sequences showed that the novel strain was related most closely to XH122, IMCC 9719 and DSM 2157 with similarities of 98.0, 97.5 and 94.3 %, respectively. Estimated DNA-DNA hybridization values were 14.2, 20.7 and 13.9 % between strain C3212 and XH122, IMCC 9719 and DSM 2157, respectively. Phenotypic, phylogenetic and genomic analyses revealed that strain C3212 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is C3212 (=MCCC 1K03600=KCTC 72121).