arthrobacter psychrolactophilus arthrobacter psychrolactophilus arthrobacter psychrolactophilus is a psychrotrophic bacterium species from the genus arthrobacter which has been isolated from soil in the united states. arthrobacter psychrolactophilus produces amylase. arthrobacter psychrolactophilus scientific classification domain: bacteria phylum: actinomycetota class: actinomycetia order: micrococcales family: micrococcaceae genus: arthrobacter species: a. psychrolactophilus binomial name arthrobacter psychrolactophilusloveland-curtze et al. 2000 type strain atcc 700733jcm 12399b7