roseiarcaceae roseiarcaceae roseiarcaceae is a family of alphaproteobacteria. roseiarcaceae scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: roseiarcaceaekulichevskaya et al. 2014 genera rhodoblastus imhoff 2001 roseiarcus kulichevskaya et al. 2014