methylobacterium tarhaniae methylobacterium tarhaniae methylobacterium tarhaniae is a gram-negative, aerobic and facultatively methylotrophic bacteria from the genus of methylobacterium which has been isolated from arid soil in abuja in nigeria. methylobacterium tarhaniae scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: methylobacteriaceae genus: methylobacterium species: m. tarhaniae binomial name methylobacterium tarhaniaeveyisoglu et al. 2013 type strain dsm 25844, kctc 23615, n4211