methylobacterium tardum methylobacterium tardum methylobacterium tardum is a bacterium from the genus of methylobacterium which has been isolated from water from a food factory in japan. methylobacterium tardum scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: methylobacteriaceae genus: methylobacterium species: m. tardum binomial name methylobacterium tardumkato et al. 2008 type strain dsm 19566, nbrc 103632, ncimb 14380, rb677