roseovarius tolerans roseovarius tolerans roseovarius tolerans is a species of bacteria, the type species of its genus. it is a budding bacterium with variable bacteriochlorophyll a production. it is gram-negative, aerobic, contains storage granules and can be motile. the type strain is el-172t (= dsm 11457t). roseovarius tolerans scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodobacterales family: rhodobacteraceae genus: roseovarius species: r. toleranslabrenz et al. 1999 binomial name roseovarius tolerans