alkalihalobacillus macyae alkalihalobacillus macyae alkalihalobacillus macyae is a gram-positive and motile bacterium from the genus of alkalihalobacillus which has been isolated from a gold mine in australia. alkalihalobacillus macyae scientific classification domain: bacteria phylum: bacillota class: bacilli order: bacillales family: bacillaceae genus: alkalihalobacillus species: a. macyae binomial name alkalihalobacillus macyae(santini et al. 2004) patel and gupta 2020 synonyms bacillus macyae