exiguobacterium antarcticum exiguobacterium antarcticum exiguobacterium antarcticum is a bacterium from the genus of exiguobacterium which has been isolated from a biofilm from the ginger lake from the king george island. exiguobacterium antarcticum scientific classification domain: bacteria phylum: bacillota class: bacilli order: bacillales family: bacillaceae genus: exiguobacterium species: e. antarcticum binomial name exiguobacterium antarcticumfrühling et al. 2002 synonyms exiguobacterium aff. acetylicum