procaryotes
   Domain Bacteria Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024
     Phylum Deferribacteres Garrity and Holt 2001 nom. inval. [monotypic] see Phylum Deferribacteres Garrity and Holt 2002 stat. inval.
       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
           Genus Synergistes Allison et al. 1993, incertae sedis