methylophaga sulfidovorans methylophaga sulfidovorans methylophaga sulfidovorans is an obligately methylotrophic, aerobic, dimethylsulfide-oxidizing bacterium. it is gram-negative, oval, with strain rb-1. methylophaga sulfidovorans scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: thiotrichales family: piscirickettsiaceae genus: methylophaga species: m. sulfidovorans binomial name methylophaga sulfidovoransde zwart et al. 1998