Fulvivirga marina sp. nov. and Fulvivirga sediminis sp. nov., two novel Bacteroidetes isolated from the marine sediment

Two novel, designated strains 29W222 T and 2943 T , were isolated from the marine sediment from Aoshan Bay, Jimo, PR China. Growth was observed at pH 6.0–8.5 (optimum, pH 7.5) for strain 29W222 T , and pH 5.5–8.5 (pH 7.0) for strain 2943 T . Both strains displayed growth in 0.5–6 % NaCl with an optimum at 1 % for 29W222 T ; 0.5 % for 2943 T . Both strains grew optimally at 33 °C. The results of phylogenetic analyses based on 16S rRNA gene sequences indicated that 29W222 T and 2943 T represented members of the genus Fulvivirga and strain 29W222 T was most closely related to Fulvivirga kasyanovii KMM 6220 T (97.9 % sequence similarity) and Fulvivirga imtechensis AK7 T (95.0 %), and 2943 T to Fulvivirga imtechensis AK7 T (95.7 %) and Fulvivirga kasyanovii KMM 6220 T (94.8 %). The genomic DNA G+C contents of 29W222 T and 2943 T were 39.9 and 37.7 mol%, respectively. The results of chemotaxonomic analysis indicated that the sole respiratory quinone was menaquinone 7 (MK-7), and the major fatty acid was iso-C 15 : 0 for both strains. Average nucleotide identity and average amino acid identity values between strain 29W222 T and Fulvivirga kasyanovii KMM 6220 T were 78.9 and 83.6 %, respectively; the corresponding values between 2943 T and Fulvivirga imtechensis AK7 T were 69.8 and 63.6 %, respectively. Therefore, strains 29W222 T and 2943 T represent to two novel species of the genus Fulvivirga , for which the names Fulvivirga marina sp. nov. (29W222 T =KCTC 62848 T =MCCC 1K05194 T ) and Fulvivirga sediminis sp. nov. (2943 T =KCTC 62847 T = MCCC 1K05144 T ) are proposed, respectively.