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 Campylobacter Sebald and Véron 1963 (Approved Lists 1980)