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 Epsilonproteobacteria Garrity et al. 2006
         Order Campylobacterales Garrity et al. 2006
           Family Campylobacteraceae Vandamme and De Ley 1991
             1 Genus Arcobacter Vandamme et al. 1991
             2 Genus Campylobacter Sebald and Véron 1963 (Approved Lists 1980)
             3 Genus Dehalospirillum Scholz-Muramatsu et al. 2002 see Genus Sulfurospirillum Schumacher et al. 1993
             4 Genus Sulfurospirillum Schumacher et al. 1993