arthrobacter psychrochitiniphilus arthrobacter psychrochitiniphilus arthrobacter psychrochitiniphilus is a psychrotrophic bacterium species from the genus arthrobacter which has been isolated from adélie penguins in antarctica. arthrobacter psychrochitiniphilus scientific classification domain: bacteria phylum: actinomycetota class: actinomycetia order: micrococcales family: micrococcaceae genus: arthrobacter species: a. psychrochitiniphilus binomial name arthrobacter psychrochitiniphiluswang et al. 2009 type strain cgmcc 1.6355jcm 13874gp3