Procaryotic Genera
   Domain "Bacteria" Woese et al. 1990
     Phylum Deferribacteres Garrity and Holt 2001 [monotypic]
       Class Deferribacteres Huber and Stetter 2001 nom. inval. [monotypic] see Class Deferribacteres Huber and Stetter 2002
         Order Deferribacteralesᵀ Huber and Stetter 2001 nom. inval. see Order Deferribacterales Huber and Stetter 2002
           1 Family Deferribacteraceae Huber and Stetter 2001 nom. inval. see Family Deferribacteraceae Huber and Stetter 2002
           2 Genus Synergistes Allison et al. 1993, incertae sedis