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

An orange-pigmented, short-rod-shaped, aerobic and non-motile bacterial strain, designated TK008, was isolated from the shallow-sea hydrothermal systems off Kueishantao Island in Taiwan, China, and it was studied by using a polyphasic taxonomic approach. Cells were Gram-stain-negative, and catalase- and oxidase-positive. Strain TK008 exhibited highest 16S rRNA gene sequence similarity of 97.1 % to F14. The phylogenetic trees based on 16S rRNA gene sequences showed that strain TK008 was a member of the genus . Digital DNA-DNA hybridization values between strain TK008 and two closely related species ( and ) were 20.6 and 20.9 %. The average nucleotide identity values of strain TK008 compared with and were 75.2 and 74.6 % respectively. The major isoprenoid quinone was ubiquinone-10. The predominant fatty acids (>10 %) were summed feature 8 (Cω6 and/or Cω7). The polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, three unidentified phospholipids, two unidentified lipids and an unidentified glycolipid. The DNA G+C content of strain TK008 from genomic sequence data was 62.54 mol%. On the basis of polyphasic analysis, strain TK008 represents a novel species, for which the name sp. nov. is proposed. The type strain is TK008 (=CGMCC 1.13898=JCM 33630).