Procaryotic Genera Domain "Bacteria" Woese et al. 1990 Phylum Proteobacteria Garrity and Holt 2001 see Phylum Proteobacteria Garrity et al. 2005 Class "Epsilonproteobacteria" nom. inval. [monotypic] 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 1 Genus Campylobacter Sebald and VĂ©ron 1963 (Approved Lists 1980) 2 Genus Arcobacter Vandamme et al. 1991 3 Genus Sulfurospirillum Schumacher et al. 1993 4 Genus Thiovulum Hinze 1913 (Approved Lists 1980)