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

Wocania indica gen. nov., sp. nov., isolated from deep sea hydrothermal sulfide in the northwest Indian Ocean, and proposal to reclassify Flaviramulus ichthyoenteri as Wocania ichthyoenteri comb. nov

A novel Gram-stain-negative, non-motile, strictly aerobic, rod-shaped bacterium was isolated from deep-sea hydrothermal sulfide in the northwest Indian Ocean Ridge and designated as strain IOP_32^T. Strain IOP_32^T could grow at 4-40 °C (optimum, 37 °C), pH 5-9 (optimum, pH 7-8) and salinity of 0-12 % NaCl (w/v; optimum, 2-3 %). The 16S rRNA gene sequence of strain IOP_32^T is most similar to Bizionia fulviae EM7^T, Bizionia berychis RA3-3-1^T, Bizionia paragorgiae KMM 6029^T and Oceanihabitans sediminis S9_10^T with 95.5-95.3 % similarity. The phylogenomic analysis indicated that strain IOP_32^T forms a distinct lineage with Flaviramulus ichthyoenteri Th78^T within the family Flavobacteriaceae. The average nucleotide identity, average amino acid identity and percentage of conserved protein values between strain IOP_32^T and the type strains of close genera were 72.3-78.5 %, 67.4-76.9 % and 56.3-61.6 %, respectively. The major cellular fatty acid was anteiso-C_15 : 0. The respiratory quinone was MK-6. The polar lipids were mainly composed of phosphatidylethanolamine, an unidentified aminophospholipid and five unidentified polar lipids. Strain IOP_32^T is significantly different from related genera, which is reflected by the wide adaptability to temperature and salinity levels, the composition of phospholipids and fatty acids, and the results of phylogenetic analyses. The phenotypic properties and phylogenetic data suggest that the lineage represents a novel genus and species within the family Flavobacteriaceae, for which the name Wocania indica gen. sp. nov. is proposed, with the type strain IOP_32^T (=MCCC 1A14017 ^T=KCTC 62660 ^T). We also propose the reclassification of Flaviramulus ichthyoenteri as Wocania ichthyoenteri comb. nov. (Th78^T=DSM 26285^T=JCM 18634^T=KCTC 32142^T).

Thalassorhabdus aurantiaca gen. nov., sp. nov., a new member of the family Flavobacteriaceae isolated from seawater in South Korea

A novel Gram-negative, orange pigmented, strictly aerobic bacterium, designated strain IP9^T, was isolated from seawater at the sea shore of Incheon Eulwang-ri beach, South Korea. Cells of strain IP9^T were observed to be straight or slightly curved rods and colonies to be round and convex. Strain IP9^T was found to be catalase and oxidase positive, and non-motile. Growth was observed in the temperature range of 10-37 °C (optimum at 30 °C), pH range of 6-10 (optimum at pH 7-8) and salt concentration range of 0-7% (w/v) NaCl (optimum at 0-1%). On the basis of 16S rRNA gene sequence similarity and phylogenetic analysis, strain IP9^T was found to be related to the members of the family Flavobacteriaceae, being closely related to Hwangdonia seohaensis KCTC 32177^T (95.3% sequence similarity). The DNA G + C content of the novel strain was determined to be 39.1 mol%. The major polar lipids were found to be phosphatidylethanolamine, three unidentified aminoglycolipids and two unidentified glycolipids. The major fatty acids (> 10%) were identified as iso-C_15:0 and iso-C_17:0 3-OH. The predominant quinone was found to be menaquinone 6 (MK-6). Based on the biochemical, phylogenetic and physiological data, we conclude that strain IP9^T (= KCTC 52523^T = JCM 31732^T) represents the type species of a novel genus of the family Flavobacteriaceae for which the name Thalassorhabdus aurantiaca gen. nov., sp. nov. is proposed.