sp. nov., isolated from the shallow-sea hydrothermal system off Kueishantao Island.

Strain designated TK19116 was isolated from the shallow-sea hydrothermal systems off Kueishantao Island in Taiwan, China. The bacterium was Gram-stain-negative, aerobic, oxidase-positive and catalase-positive. Cells of the strain TK19116 were short-rod-shaped and non-motile. The results of phylogenetic analysis of 16S rRNA gene sequences indicated that strain TK19116 belonged to the genus , with the highest sequence similarity to 4-2 (97.1 %). The average nucleotide identity values between the strain TK19116 with 4-2, J6, M26 and BM15 were 75.3, 76.7, 76.7 and 75.8%, respectively. The digital DNA-DNA hybridization value between the strain TK19116 with 4-2, J6, M26 and BM15 were 19.7, 20.3, 20.5 and 20.0%, respectively. The main respiratory quinone of strain TK19116 was ubiquinone 10. The polar lipids include aminolipid, phosphatidylcholine, diphosphatidylglycerol, glycolipid, phosphatidylglycerol and phospholipid. The principal fatty acid of strain TK19116 was summed feature 8 (C 6 and/or C 7). The G+C content of the chromosomal DNA was 64.2 %. The combination of the results of the phylogenetic, phenotypic and chemotaxonomic analysis, strain TK19116 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is TK19116 (= MCCC 1K08025=JCM 35527).