A Gram-negative, aerobic, pink-pigmented, and bacteriochlorophyll -containing bacterial strain, designated B14, was isolated from the macroalga sampled from the southern North Sea, Germany. Based on 16S rRNA gene sequences, species of the genera and were most closely related to strain B14 with sequence identities ranging from 98.15 % ( Och 114) to 99.11 % ( Och 149), whereas CH-B427 exhibited 98.52 % sequence identity. Digital DNA-DNA hybridization and average nucleotide identity values between the genome of the novel strain and that of closely related and type strains were <20 % and <77 %, respectively. The novel strain contained ubiquinone-10 as the only respiratory quinone and C ω7, C, C, C ω7, C ω7,13, and C 3-OH as the major cellular fatty acids. The predominant polar lipids of strain B14 were phosphatidylcholine, phosphatidylethanolamine, and phosphatidylglycerol. The genome of strain B14 comprises a chromosome with a size of 4.5 Mbp, one chromid, and four plasmids. The genome contains the complete gene cluster for aerobic anoxygenic photosynthesis required for a photoheterotrophic lifestyle. The results of this study indicate that strain B14 (=DSM 116946=LMG 33352) represents a novel species of the genus for which the name sp. nov. is proposed.
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