[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Bacteria Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024
     Phylum "Fibrobacteres" Garrity and Holt 2001 nom. inval. see Phylum Fibrobacteres Garrity and Holt 2012 stat. inval.
       Class "Fibrobacteres" "Garrity and Holt 2001" nom. nud. see Class Fibrobacteria Spain et al. 2012
         Order "Fibrobacterales" "Garrity and Holt 2001" nom. nud. see Order Fibrobacterales Spain et al. 2012
           Family "Fibrobacteraceae" "Garrity and Holt 2001" nom. nud. see Family Fibrobacteraceae Spain et al. 2012
             Genus Fibrobacter Montgomery et al. 1988
               [Fibrobacter succinogenes] (Hungate 1950) Montgomery et al. 1988
                 1 Fibrobacter succinogenes subsp. succinogenesᵀ (Hungate 1950) Montgomery et al. 1988
                 2 Fibrobacter succinogenes subsp. elongatus corrig. Montgomery et al. 1988