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
           1 Family Bacteroidaceae Pribram 1933 (Approved Lists 1980)
           2 Family Marinilabiliaceae Ludwig et al. 2012
           3 Family Porphyromonadaceae Krieg 2012
           4 Family Prevotellaceae Krieg 2012
           5 Family Prolixibacteraceae Huang et al. 2014
           6 Family Rikenellaceae Krieg et al. 2012
           7 Genus Phocaeicola Al Masalma et al. 2009, incertae sedis
           8 Genus Sunxiuqinia Qu et al. 2011, incertae sedis