microbacterium invictum microbacterium invictum microbacterium invictum is a gram-positive and facultatively aerobic bacterium from the genus microbacterium which has been isolated from compost in portugal. microbacterium invictum scientific classification domain: bacteria phylum: actinomycetota class: actinomycetia order: micrococcales family: microbacteriaceae genus: microbacterium species: m. invictum binomial name microbacterium invictumvaz-moreira et al. 2009 type strain cip 110032dc-200dsm 19600jcm 17023lmg 24557