methylobacterium variabile methylobacterium variabile methylobacterium variabile is a bacterium from the genus of methylobacterium which has been isolated from drinking water in spain. methylobacterium variabile scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: methylobacteriaceae genus: methylobacterium species: m. variabile binomial name methylobacterium variabilewellner et al. 2013 type strain ccm 7281, cect 7045, dsm 16961, gr3, lmg 28247, ncimb 14628, willems r-52863 synonyms methylobacterium variabilis