leifsonia leifsonia leifsonia is a gram-positive genus of bacteria from the family microbacteriaceae. leifsonia scientific classification domain: bacteria phylum: actinomycetota class: actinomycetia order: micrococcales family: microbacteriaceae genus: leifsoniaevtushenko et al. 2000 type species leifsonia aquatica(ex leifson 1962) evtushenko et al. 2000 species l. antarctica pindi et al. 2009 l. aquatica (ex leifson 1962) evtushenko et al. 2000 l. bigeumensis dastager et al. 2008 "l. flava" cai et al. 2018 l. kafniensis pindi et al. 2009 l. lichenia an et al. 2010 l. naganoensis suzuki et al. 2000 l. poae evtushenko et al. 2000 l. psychrotolerans ganzert et al. 2011 l. rubra reddy et al. 2003 l. shinshuensis suzuki et al. 2000 l. soli madhaiyan et al. 2010 l. xyli (davis et al. 1984) evtushenko et al. 2000