methylorosula methylorosula methylorosula is a gram-negative genus of bacteria from the family of beijerinckiaceae, with one known species (methylorosula polaris). methylorosula scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: beijerinckiaceae genus: methylorosulaberestovskaya et al. 2012 type species methylorosula polaris species m. polaris