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 Prevotellaceae Krieg 2012
             1 Genus Alloprevotella Downes et al. 2013
             2 Genus Hallella Moore and Moore 1994
             3 Genus Paraprevotella Morotomi et al. 2009
             4 Genus Prevotella Shah and Collins 1990
             5 Genus Xylanibacter Ueki et al. 2006