Crenalkalicoccus roseus gen. nov., sp. nov., a thermophilic bacterium isolated from alkaline hot springs

Two closely related thermophilic bacterial strains, designated YIM 78023T and YIM 78058, were isolated from samples collected from two alkaline hot springs in Tengchong county, Yunnan province, south-west China. The novel isolates were Gram-stain-negative, non-motile, aerobic ovoid- to coccoid-shaped and non-spore-forming. Strain YIM 78023T grew at 20-60 oC and pH 6.0-9.0 with optimal growth observed at 40-50 oC and pH 8.0, while strain YIM 78058 grew at 25-60 oC and pH 6.0-10.0 with optimal growth at 45-50 oC and pH 8.0. Phylogenetic analysis based on 16S rRNA gene sequences affiliated these two isolates within the family Acetobacteraceae with high sequence similarities to members of the genera Roseomonas and Belnapia (all sequence similarities