prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   Domain "Bacteria" Woese et al. 1990
     Phylum "Proteobacteria" Garrity et al. 2005 see Superphylum Proteobacteria Craig et al. 2010
       Class Deltaproteobacteria Kuever et al. 2006
         Order Desulfuromonadales corrig. Kuever et al. 2006
           Family Geobacteraceae Holmes et al. 2004
             1 Genus Geoalkalibacter Zavarzina et al. 2007
             2 Genus Geobacter Lovley et al. 1995
             3 Genus Geopsychrobacter Holmes et al. 2005
             4 Genus Geothermobacter Kashefi et al. 2005
             5 Genus Trichlorobacter De Wever et al. 2001 see Genus Geobacter Lovley et al. 1995