rhodoblastus rhodoblastus rhodoblastus is a genus of bacteria from the order hyphomicrobiales. rhodoblastus scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: roseiarcaceae genus: rhodoblastusimhoff 2001 type species rhodoblastus acidophilus species r. acidophilus r. sphagnicola