sp. nov., isolated from a deep well with oil reservoir water.

A Gram-stain-negative, non-motile and ovoid bacterial strain, designated 4-2, was isolated from oil-contaminated water which was collected from Xinjiang Province, north-west PR China. The 16S rRNA gene sequence analysis showed that strain 4-2 belonged to the genus . The species with highest similarity to strain 4-2 was YIM 90738 (97.83 %), followed by '' M26 (97.83 %) and SYSUP0003 (97.25 %). The average nucleotide identity values between 4-2 and three type strains were 84.69, 77.88 and 74.07 %, respectively. The genomic DNA G+C content of strain 4-2 was 61.4 mol%. Chemotaxonomical characteristic results showed that the respiratory quinone was ubiquinone Q-10 and the major fatty acids were summed feature 8 (C 7 or C 6) and C cyclo 8. The polar lipid profile consisted of diphosphatidylglycerol, phosphatidylglycerol, phosphatidylcholine, unidentified phospholipids, an unidentified aminolipid and an unidentified polar lipid. The predominant polyamines were putrescine, cadaverine and spermidine. On the basis of phenotypic, chemotaxonomic and phylogenetic inferences, strain 4-2 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is 4-2 (=CGMCC 1.13669=LMG 30882).