novosphingobium rhizosphaerae novosphingobium rhizosphaerae novosphingobium rhizosphaerae is a gram-negative, non-spore-forming and rod-shaped bacterium from the genus novosphingobium which has been isolated from the rhizosphere of the corn plant zea mays in tallassee, alabama in the united states. novosphingobium rhizosphaerae scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: sphingomonadales family: erythrobacteraceae genus: novosphingobium species: n. rhizosphaerae binomial name novosphingobium rhizosphaeraekämpfer et al. 2015 type strain ccm 8547, lmg 28479, jm-1