virgibacillus salexigens virgibacillus salexigens virgibacillus salexigens is a species of gram-positive bacteria. virgibacillus salexigens scientific classification domain: bacteria phylum: bacillota class: bacilli order: bacillales family: bacillaceae genus: virgibacillus species: v. salexigens binomial name virgibacillus salexigensheyrman et al. 2003 taxonomy this species was formerly contained by the genus salibacillus and before that by bacillus. strains of this species were originally isolated from salterns and saline soil samples in spain. they are spore-forming, slightly aerobic, and moderately halophilic.