desulfococcus desulfococcus desulfococcus is a gram-negative, anaerobic and motile bacteria genus from the family of desulfococcaceae. desulfococcus scientific classification domain: bacteria phylum: thermodesulfobacteriota class: desulfobacteria order: desulfobacterales family: desulfococcaceae genus: desulfococcuswiddel 1981 type species desulfococcus multivorans species d. biacutus d. oleovorans d. multivorans