Domain Bacteria Woese et al. 1990
   Phylum Proteobacteria Garrity and Holt 2001 see Phylum Proteobacteria Garrity et al. 2005
     Class "Epsilonproteobacteria" nom. inval. see Class Epsilonproteobacteria Garrity et al. 2006
       Order "Campylobacterales" nom. inval. see Order Campylobacterales Garrity et al. 2006
         Family Campylobacteraceae Vandamme and De Ley 1991
           Genus Arcobacter Vandamme et al. 1991
           Genus Sulfurospirillum Schumacher et al. 1993
           Genus Thiovulum Hinze 1913 (Approved Lists 1980)
           1 Genus Campylobacter Sebald and Véron 1963 (Approved Lists 1980)