prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   Domain "Bacteria" Woese et al. 1990
     Phylum "Bacteroidetes" Krieg et al. 2012
       Class Bacteroidia Krieg 2012 [monotypic]
         Order Bacteroidales Krieg 2012
           Family Bacteroidaceae Pribram 1933 (Approved Lists 1980)
             1 Genus Acetofilamentum Dietrich et al. 1989
             2 Genus Acetomicrobium Soutschek et al. 1985
             3 Genus Acetothermus Dietrich et al. 1988
             4 Genus Anaerorhabdus Shah and Collins 1986
             5 Genus Bacteroides Castellani and Chalmers 1919 (Approved Lists 1980)
             6 Genus Capsularis Prévot 1938 (Approved Lists 1980) see Genus Prevotella Shah and Collins 1990