Maribacter arenosus sp. nov., isolated from marine sediment.

A Gram-staining-negative, non-spore-forming, non-gliding, aerobic bacterial strain, designated CAU 1321T was isolated from marine sediment in Incheon, South Korea. The strain's taxonomic position was investigated using a polyphasic approach. CAU 1321T grew optimally at 30 °C and at pH 8 in the presence of 1 % (w/v) NaCl. Phylogenetic analysis based on the 16S rRNA gene sequence revealed that CAU 1321T represented a member of the genus Maribacter, closely related to Maribacter polysiphoniae KCTC 22021T (similarity 98.0 %). The strain contained MK-6 as the predominant menaquinone and iso-C15 : 0, iso-C17 : 0 3-OH, and iso-C15 : 1 G as the major fatty acids. The polar lipids of CAU 1321T consisted of phosphatidylethanolamine, one unidentified aminoglycolipid, five unidentified aminolipids, two unidentified aminophospholipids, two unidentified glycolipids and three unidentified lipids. The DNA G+C content was 40.6 mol% and the level of DNA-DNA relatedness between CAU 1321T and the most closely related strain, M. polysiphoniae KCTC 22021T was 25.2 %. On the basis of phenotypic and chemotaxonomic properties, and phylogenetic inference, CAU 1321T is considered to represent a novel species of the genus Maribacter, for which the name Maribacter arenosus sp. nov. is proposed. The type strain is CAU 1321T (=KCTC 52191T=NBRC 111990T).