Gelatiniphilus marinus gen. nov., sp nov., a bacterium from the culture broth of a microalga, Picochlorum sp 122, and emended description of the genus Hwangdonia

Gram-stain-negative, non-motile, non-spore-forming, rod-shaped bacterium, designated strain GYP-24(T), was isolated from the culture broth of a marine microalga, Picochlorum sp. 122. Phylogenetic analyses based on 16S rRNA gene sequences indicated that strain GYP-24(T) forms a robust cluster with H. wangdonia seohaensis KCTC 32177(T) (95.8% sequence similarity) in the family Flavobacteriaceae. Growth of strain GYP-24(T) was observed at 15, 22, 28, 30, 33 and 37 degrees C (optimal 30-33 degrees C), pH 6.0-10.0 (optimal pH 7.0-8.0) and in the presence of 0.5-4% (w/v) NaCl (optimal 2-3 %). The only menaquinone of strain GYP-24(T) was MK-6, and the G+C content of the genomic DNA was 36.9 mol%. The major fatty acid profile comprised iso-C-17:0 3-OH, summed feature 3 (C-16:1 omega 7c/omega 6c), iso-C-15:1 G and iso-C-15:0. The major polar lipids of strain GYP-24(T) were phosphatidylethanolamine, one unidentified phospholipid, three unidentified aminolipids and three unidentified lipids. Comprehensive analyses based on polyphasic characterization of GYP-24(T) indicated that it represents a novel species of a new genus, for which the name Gelatiniphilus marinus gen. nov., sp. nov. is proposed. The type strain is GYP-24(T) (= KCTC 42903(T) = MCCC 1K01730(T)). An emended description of the genus Hwangdonia is also given.