Umboniibacter caenipelagi sp. nov., isolated from a tidal flat

A Gram-stain-negative, non-motile, aerobic and ovoid or rod-shaped bacterium, designated SCTF-16^T, was isolated from a tidal flat on the Yellow Sea, South Korea. Strain SCTF-16^T grew optimally at 30 ºC, at pH 7.0–7.5 and in the presence of 2.0% (w/v) NaCl. In the neighbour-joining, maximum-likelihood and maximum-parsimony phylogenetic trees based on 16S rRNA gene sequences, strain SCTF-16^T clustered with the type strains of two species of the genus Umboniibacter. Strain SCTF-16T exhibited 16S rRNA gene sequence similarities of 99.6 and 97.1% to the type strains of Umboniibacter roseus and Umboniibacter marinipuniceus, respectively, and of less than 93.4% to the type strains of the other recognized species. Strain SCTF-16^T contained Q-7 as the predominant ubiquinone and summed feature 3 (C_{16: 1}ω7c and/or_{C16: 1}ω6c) and C_{13: 0} as the major fatty acids. The major polar lipids detected in strain SCTF-16^T were phosphatidylethanolamine and phosphatidylglycerol. The DNA G+C content of strain SCTF-16^T was 50.0 mol%, and its mean DNA–DNA relatedness values with the type strains of U. roseus and U. marinipuniceus were 31 and 9 %, respectively. The differential phenotypic properties, together with the phylogenetic and genetic distinctiveness, revealed that strain SCTF-16^T is separated from the two recognized species of the genus Umboniibacter. On the basis of the data presented, strain SCTF-16^T is considered to represent a novel species of the genus Umboniibacter, for which the name Umboniibacter caenipelagi sp. nov. is proposed. The type strain is SCTF-16^T (=KCTC 52628^T=NBRC 112760^T).