sp. nov., isolated from the Haima cold seep, South China Sea.

A Gram-stain-negative, orange-yellow, rod-shaped bacterium, designated strain SCSIO 19198, was isolated from sediment of the Haima cold seep in the South China Sea, PR China. The strain was aerobic and non-motile. Growth of strain SCSIO 19198 occurred at pH 7-9 (optimum, pH 7), 15-37 °C (optimum, 25-32 °C) and with 3-8 % (w/v) NaCl (optimum, 3-6 % NaCl). Phylogenetic analyses based on 16S rRNA sequences revealed that strain SCSIO 19198 belonged to the genus , having the highest similarity to HD-3 (98.35 %), followed by KYW589 (95.17 %) and GYP-24 (94.89 %). The DNA G+C content was 35.92 mol%. The average nucleotide identity value between the genome of strain SCSIO 19198 and that of HD-3 was 88.49 %. The digital DNA-DNA hybridization value between strain SCSIO 19198 and HD-3 was 36 %. The major fatty acids (>10 %) of strain SCSIO 19198 were iso-C, iso-C G, summed feature 3 (C 6/C ω7) and anteiso-C. MK-6 was the only detected respiratory quinone. The polar lipids of strain SCSIO 19198 included phosphatidylethanolamine, two aminolipids, glycolipid and two unidentified lipids. The phenotypic, phylogenetic, chemotaxonomic and genomic data clearly suggest that strain SCSIO 19198 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is SCSIO 19198 (=MCCC 1K08674=KCTC 102078).