sp. nov., a marine bacterium isolated from intertidal sand of the Yellow Sea.

A novel rod-shaped and Gram-stain-negative bacterium, designated strain RZ05, was isolated from a sand sample collected from the intertidal zone of the Yellow Sea, PR China. Results of phylogenetic analysis based on 16S rRNA gene sequences revealed that strain RZ05 clusters within the genus , a member of the family , and has the highest sequence similarity to KCTC 22021 (97.8 %), followed by KCTC 52191 (97.2 %). Cells of this strain were observed to be aerobic, oxidase- and catalase-positive, motile by gliding and formed yellow colonies. Growth occurred at 7-40 °C (optimum, 30 °C), at pH 6.5-9.5 (optimum, pH 7.0) and with 0.5-6 % (optimum, 2 %) NaCl. Its polar lipid profile included phosphatidylethanolamine, two unidentified glycolipids, one unidentified aminolipid and four unidentified lipids. The major cellular fatty acids were iso-C, iso-C G, iso-C 3-OH, iso-C 3-OH, iso-C 3-OH, summed feature 9 (10-methyl C/iso-C ω9) and summed feature 3 (iso-C 2-OH/C ω7/C ω6). The only respiratory quinone was menaquinone 6 (MK-6). The genome of strain RZ05 was 4.65 Mbp with a G+C content of 38.9 mol%. The average nucleotide identity and DNA-DNA hybridization values between strain RZ05 and its most closely related type strain KCTC 22021 were 80.3 and 26.3  %, respectively. The results of phylogenetic, phenotypic and chemotaxonomic analyses indicated that strain RZ05 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is RZ05 (=KCTC 62834=MCCC 1K03617).