novosphingobium nitrogenifigens novosphingobium nitrogenifigens novosphingobium nitrogenifigens is a gram-negative, diazotroph and rod-shaped bacterium from the genus novosphingobium which has been isolated from pulp and paper wastewater in new zealand. novosphingobium nitrogenifigens scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: sphingomonadales family: erythrobacteraceae genus: novosphingobium species: n. nitrogenifigens binomial name novosphingobium nitrogenifigensaddison et al. 2007 type strain dsm 19370, icmp 16470, y88