prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   Domain "Bacteria" Woese et al. 1990
     Phylum "Deferribacteres" Garrity and Holt 2001 [monotypic]
       Class Deferribacteres Huber and Stetter 2002 [monotypic]
         Order Deferribacterales Huber and Stetter 2002
           Family Deferribacteraceae Huber and Stetter 2002
             1 Genus Calditerrivibrio Iino et al. 2008
             2 Genus Deferribacter Greene et al. 1997
             3 Genus Denitrovibrio Myhr and Torsvik 2000
             4 Genus Flexistipes Fiala et al. 2000
             5 Genus Geovibrio Caccavo et al. 2000
             6 Genus Mucispirillum Robertson et al. 2005
             7 Genus Seleniivibrio Rauschenbach et al. 2013