prosthecomicrobium hirschii prosthecomicrobium hirschii prosthecomicrobium hirschii is a bacterium from the genus of prosthecomicrobium with a polar or subpolar flagella. prosthecomicrobium hirschii has been isolated from a muskrat pond in north carolina in the united states. prosthecomicrobium hirschii scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: hyphomicrobiaceae genus: prosthecomicrobium species: p. hirschii binomial name prosthecomicrobium hirschiistaley 1984 type strain atcc 27832, dsm 8907