rubrobacter calidifluminis rubrobacter calidifluminis rubrobacter calidifluminis is a thermophilic and strictly aerobic bacterium from the genus of rubrobacter which has been isolated from the são miguel island in the azores. rubrobacter calidifluminis scientific classification domain: bacteria phylum: actinomycetota class: rubrobacteria order: rubrobacterales family: rubrobacteraceae genus: rubrobacter species: r. calidifluminis binomial name rubrobacter calidifluminisalbuquerque et al. 2014 type strain cect 8308, jcm 19154, rg-1t