prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   Domain "Bacteria" Woese et al. 1990
     Phylum "Fusobacteria" Garrity and Holt 2012 [monotypic]
       Class Fusobacteriia Staley and Whitman 2012 [monotypic]
         Order Fusobacteriales Staley and Whitman 2012
           Family Fusobacteriaceae Staley and Whitman 2012
             1 Genus Cetobacterium Foster et al. 1996
             2 Genus Fusobacterium Knorr 1922 (Approved Lists 1980)
             3 Genus Ilyobacter Stieb and Schink 1985
             4 Genus Propionigenium Schink and Pfennig 1983
             5 Genus Psychrilyobacter Zhao et al. 2009