Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 1990 [paraphyletic?]
             Superphylum Fibrobacteres-Chlorobi-Bacteroidetes (FCB) Gupta 2004
               Phylum Bacteroidetes Krieg et al. 2012
                 Class Bacteroidiaᵀ Krieg 2012 [monotypic]
                   Order Bacteroidalesᵀ Krieg 2012
                     Family Bacteroidaceaeᵀ Pribram 1933 (Approved Lists 1980)
                       1 Genus Acetofilamentum Dietrich et al. 1989 [monotypic]
                       2 Genus Acetomicrobium Soutschek et al. 1985
                       3 Genus Acetothermus Dietrich et al. 1988 [monotypic]
                       4 Genus Bacteroidesᵀ Castellani and Chalmers 1919 (Approved Lists 1980)
                       5 Genus Anaerorhabdus Shah and Collins 1986 [monotypic]