sp. nov., isolated from mangrove sediment.

A Gram-variable, aerobic, motile and irregular rod-shaped bacterium, designated HB172195, was isolated from a mangrove sediment sample collected from Bamen Bay mangrove forest, China. Cells of the strain were oxidase-negative but positive for catalase and nitrate reduction. Strain HB172195 was found to grow at 15-50 °C (optimum, 25-40 °C), pH 5.0-9.0 (optimum, pH 7.0) and in 1.0-11.0 % (w/v) NaCl (optimum, 3-6 %). Chemotaxonomic analysis indicated that the sole respiratory quinone was MK-7 and the cell-wall peptidoglycan was -diaminopimelic acid. The predominant cellular fatty acids were anteiso-C, anteiso-C and Cω alcohol. The major polar lipids consisted of phosphatidylglycerol, phosphatidylethanolamine, diphosphatidylglycerol and an unidentified phospholipid. The genomic DNA G+C content was 40.9 mol%. Phylogenetic analysis based on 16S rRNA gene sequences showed that the strain was closely related to SW-72 (96.3%), KMM 3737 (96.2 %) and JSM 076093 (95.5 %). Based on polyphasic taxonomic characterization, strain HB172195 is considered to represent a novel species, for which the name sp. nov. is proposed. The type strain is HB172195 (=CGMCC 1.16730=JCM 33411).