A novel Gram-stain-negative, facultatively anaerobic, oxidase-negative, catalase-positive bacillus, designated WD2A32T, was isolated from a marine solar saltern in the coast of Weihai, Shandong Province, PR China. Strain WD2A32T grew optimally at 37-40 °C (range, 20-45 °C) and pH 7.0-7.5 (range, 6.5-8.0) and was tolerant to 6-8 % (w/v) NaCl (range, 2-12 %). The 16S rDNA of strain WD2A32T was most similar (93.5 %) to that of Rhodovibrio salinarumDSM 9154T (the type species of the genus Rhodovibrio), followed by Limimonas halophilaDSM 25584T (92.4 %; the type species of the genus Limimonas). The similarities to the type strains of the genera Pelagibiusand Limibacilluswere less than 91.0 %. The draft genome sequence of strain WD2A32T contained 72 contigs (>507 bp) of 4 237 996 bp with a DNA G+C content of 65.5 mol%. The major polar lipids of strain WD2A32T were phosphatidylglycerol, phosphatidylcholine, phosphatidylethanolamine and unidentified aminolipids; major cellular fatty acids were summed feature 8 (C18 : 1ω7c/C18 : 1ω6c) and C19 : 0 cyclo ω8c; the major respiratory quinone was Q-10. On the basis of the results from chemotaxonomic, physiological and biochemical analyses, strain WD2A32T represents a novel species of a novel genus in the family Rhodospirillaceae, for which the name Ferruginivarius sediminum gen. nov., sp. nov. has been proposed. The type strain is WD2A32T (=KCTC 52888T=MCCC 1H00201T).
Keywords: 16S rRNA gene; Rhodospirillaceae; phylogenetic analysis..