microbacterium pygmaeum microbacterium pygmaeum microbacterium pygmaeum is a gram-positive, aerobic and non-motile bacterium from the genus microbacterium which has been isolated from soil from the aoyama cemetery in tokyo, japan. microbacterium pygmaeum scientific classification domain: bacteria phylum: actinomycetota class: actinomycetia order: micrococcales family: microbacteriaceae genus: microbacterium species: m. pygmaeum binomial name microbacterium pygmaeumkageyama et al. 2008 type strain jcm 15925nbrc 101800nrrl b-24469kv-490