arthrobacter ruber arthrobacter ruber arthrobacter ruber is a gram-positive bacterium from the genus arthrobacter has been isolated from ice from the midui glacier from tibet. arthrobacter ruber scientific classification domain: bacteria phylum: actinomycetota class: actinomycetia order: micrococcales family: micrococcaceae genus: arthrobacter species: a. ruber binomial name arthrobacter ruberliu et al. 2018 type strain cgmcc 1.9772nbrc 113088mdb1-42