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A bacterial strain, designated JN14-9T, was isolated from surface sediment of the Jiulong River and characterized in a taxonomic study using a polyphasic approach. Strain JN14-9T was Gram-stain-negative, non-motile, rod-shaped and orange-pigmented. It can grow at 15-37 °C (optimum 25-30 °C), at pH 7-8 (optimum pH 7) and in 2-6 % (w/v) NaCl (optimum 3-4 %). Phylogenetic analyses based on 16S rRNA gene sequences showed that strain JN14-9T formed an independent lineage related to the family Cytophagaceae with low 16S rRNA gene sequence similarities (&lt;92.5 %) to members of other genera with validly published names. The principal fatty acids of strain JN14-9T were summed feature 3 (C16:1ω6c/C16:1ω7c) and iso-C15:0. The isoprenoid quinone was identified as MK-7. The major polar lipids comprised diphosphatidylglycerol, phosphatidylethanolamine, three aminophospholipids and five unidentified phospholipids. The DNA G+C content was 41.6 mol%. Results of phenotypic, phylogenetic and chemotaxonomic analyses clearly indicate that strain JN14-9T represents a novel species of a new genus within the family Cytophagaceae, for which the name Jiulongibacter sediminis gen. nov., sp. nov. is proposed. The type strain of the type species is JN14-9T (=MCCC 1A00733T=KCTC 42153T).

international journal of systematic and evolutionary microbiology

Jiulongibacter sediminis gen. nov., sp. nov., a new member of the family Cytophagaceae, isolated from the surface sediment of the Jiulong River in China