methylibium petroleiphilum methylibium petroleiphilum methylibium petroleiphilum is a species of methyl tert-butyl ether-degrading methylotroph, the type species of its genus. it is a gram-negative, rod-shaped, motile, non-pigmented, facultative aerobe, with type strain pm1t (=atcc baa-1232t =lmg 22953t). methylibium petroleiphilum scientific classification domain: bacteria phylum: pseudomonadota class: betaproteobacteria order: burkholderiales family: incertae sedis genus: methylibium species: m. petroleiphilum binomial name methylibium petroleiphilumnakatsu et al. 2006