dyadobacter arcticus dyadobacter arcticus dyadobacter arcticus is a gram-negative, psychrotolerant, rod-shaped, aerobic and non-motile bacterium from the genus of dyadobacter which has been isolated from arctic soil from svalbard archipelago in norway. dyadobacter arcticus scientific classification domain: bacteria phylum: bacteroidota class: cytophagia order: cytophagales family: spirosomaceae genus: dyadobacter species: d. arcticus binomial name dyadobacter arcticuschen et al. 2013 type strain cctcc ab 2011022, r-s7-29, nrrl b-59659