microbacterium fluvii microbacterium fluvii microbacterium fluvii is a gram-positive bacterium from the genus microbacterium which has been isolated from driftwood from the maera river from japan's iriomote island. microbacterium fluvii scientific classification domain: bacteria phylum: actinomycetota class: actinomycetia order: micrococcales family: microbacteriaceae genus: microbacterium species: m. fluvii binomial name microbacterium fluviikageyama et al. 2008 type strain dsm 18908jcm 16545mbic08277ysl3-15