arthrobacter humicola arthrobacter humicola arthrobacter humicola is a gram-positive bacterium species from the genus arthrobacter which has been isolated from soil in japan. arthrobacter humicola scientific classification domain: bacteria phylum: actinomycetota class: actinomycetia order: micrococcales family: micrococcaceae genus: arthrobacter species: a. humicola binomial name arthrobacter humicolakageyama et al. 2008 type strain kv-653jcm 15921nbrc 102056nrrl b-24479