Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 2024
             Kingdom Fusobacteriati Battistuzzi and Hedges 2024 [monotypic]
               Phylum Fusobacteriotaᵀ Garrity and Holt 2021 [monotypic]
                 Class Fusobacteriiaᵀ Staley and Whitman 2012 [monotypic]
                   Order Fusobacterialesᵀ Staley and Whitman 2012
                     Family Fusobacteriaceaeᵀ Staley and Whitman 2012
                       1 Genus Cetobacterium Foster et al. 1996
                       2 Genus Fusobacteriumᵀ Knorr 1922 (Approved Lists 1980)
                       3 Genus Hypnocyclicus Roalkvam et al. 2015
                       4 Genus Ilyobacter Stieb and Schink 1985
                       5 Genus Piscibacter Takeuchi and Sugahara 2025
                       6 Genus Propionigenium Schink and Pfennig 1983
                       7 Genus Psychrilyobacter Zhao et al. 2009 [monotypic]