Procaryotic Genera
   Domain "Bacteria" Woese et al. 1990
     Phylum Bacteroidetes Garrity and Holt 2001 see Phylum Bacteroidetes Krieg et al. 2012
       Class "Bacteroidetes" Krieg et al., 2012 [monotypic] see Class Bacteroidia Krieg et al., 2012
         Order "Bacteroidales" Krieg 2012 see Order Bacteroidales Krieg 2012
           Family Bacteroidaceae Pribram 1933 (Approved Lists 1980)
             1 Genus Bacteroides Castellani and Chalmers 1919 (Approved Lists 1980)
             2 Genus Acetofilamentum Dietrich et al. 1989
             3 Genus Acetomicrobium Soutschek et al. 1985
             4 Genus Acetothermus Dietrich et al. 1988
             5 Genus Anaerorhabdus Shah and Collins 1986
             6 Genus Megamonas Shah and Collins 1983