Luteirhabdus pelagi gen. nov., sp. nov., a novel member of the family Flavobacteriaceae, isolated from the West Pacific Ocean.

A Gram-stain-negative, aerobic, and yellow-pigmented bacterium, designated A3-108, was isolated from seawater of the West Pacific Ocean. Cells were non-motile and rod-shaped, with carotenoid-type pigments. Strain A3-108 grew at pH 6.0-8.5 (optimum 6.5) and 15-40 °C (optimum 28 °C), in the presence of 0.5-10% (w/v) NaCl (optimum 1.0%). It possessed the ability to produce HS. Based on the 16S rRNA gene analysis, strain A3-108 exhibited highest similarity with Aureisphaera salina A6D-50 (90.6%). Phylogenetic analysis shown that strain A3-108 affiliated with members of the family Flavobacteriaceae and represented an independent lineage. The principal fatty acids were iso-C, iso-C 3-OH, iso-C G, and summed feature 3 (Cω7c and/or Cω6c). The sole isoprenoid quinone was MK-6. The major polar lipids were phosphatidylethanolamine, one unidentified aminophospholipid, one unidentified aminolipid and one unidentified lipid. The ANIb, in silico DDH and AAI values among the genomes of strain A3-108 and three reference strains were 67.3-71.1%, 18.7-22.1%, and 58.8-71.4%, respectively. The G + C content was 41.0%. Distinctness of the phylogenetic position as well as differentiating chemotaxonomic and other phenotypic traits revealed that strain A3-108 represented a novel genus and species of the family Flavobacteriaceae, for which the name Luteirhabdus pelagi gen. nov., sp. nov. is proposed (type strain, A3-108 = CGMCC 1.18821 = KCTC 82563).