microvirga lupini microvirga lupini microvirga lupini is a nitrogen-fixing, gram-negative, aerobic rod-shaped and non-spore-forming bacteria from the genus of microvirga. microvirga lupini scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: methylobacteriaceae genus: microvirga species: m. lupini binomial name microvirga lupiniardley et al. 2012 type strain hambi 3236, lmg 26460, lut6, willems r-41057 synonyms microvirga texensis, rhizobiales bacterium