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Gram-negative, aerobic, chemo-organotrophic and bacteriochlorophyll a-containing bacterial strains, KEBCLARHB70RT, KAMCLST3051 and KAMCLST3152, were isolated from the thalli of Cladonia arbuscula and Cladonia stellaris lichens. Cells from the strains were coccoid and reproduced by binary division. They were motile at the early stages of growth and utilized sugars and alcohols. All strains were psychrophilic and acidophilic, capable of growth between pH 3.5 and 7.5 (optimum, pH 5.5), and at 4–30 °C (optimum, 10–15 °C). The major fatty acids were C18 : 1 ω7c and C18 : 0; the lipids were phosphatidylcholines, phosphatidylethanolamines, phosphatidic acids, phosphatidylglycerol, glycolipids, diphosphatidylglycerol and polar lipids with an unknown structure. The quinone was Q-10. The DNA G+C content was 67.8 mol%. Comparative 16S rRNA gene analysis together with other data, supported that the strains, KEBCLARHB70RT, KAMCLST3051 and KAMCLST3152 belonged to the same species. Whole genome analysis of the strain KEBCLARHB70RT and average amino acid identity values confirmed its distinctive phylogenetic position within the family Acetobacteraceae . Phenotypic, ecological and genomic characteristics distinguished strains KEBCLARHB70RT, KAMCLST3051 and KAMCLST3152 from all genera in the family Acetobacteraceae . Therefore, we propose a novel genus and a novel species, Lichenicoccus roseus gen. nov., sp. nov., for these novel Acetobacteraceae members. Strain KEBCLARHB70RT (=KCTC 72321T=VKM B-3305T) has been designated as the type strain.
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