oharaeibacter oharaeibacter oharaeibacter is a genus of bacteria from the family of methylocystaceae with one known species (oharaeibacter diazotrophicus). oharaeibacter scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: pleomorphomonadaceae genus: oharaeibacterlv et al. 2017 species o. diazotrophicus