arthrobacter castelli arthrobacter castelli arthrobacter castelli is a bacterium species from the genus arthrobacter which has been isolated from biofilm from mural paintings in the saint-catherine chapel in herberstein, austria. arthrobacter castelli scientific classification domain: bacteria phylum: actinomycetota class: actinomycetia order: micrococcales family: micrococcaceae genus: arthrobacter species: a. castelli binomial name arthrobacter castelliheyrman et al. 2005 type strain dsm 16402dsm 16402 t1dsm 16402 t2heyrman r-5102iam 15349jcm 21794lmg 22283mcha6085