[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   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
             Genus Campylobacter Sebald and Véron 1963 (Approved Lists 1980)
               01 [Campylobacter fetus] (Smith and Taylor 1919) Sebald and Véron 1963 (Approved Lists 1980)
               02 Campylobacter coli (Doyle 1948) Véron and Chatelain 1973 (Approved Lists 1980)
               03 Campylobacter concisus Tanner et al. 1981
               04 Campylobacter curvus (Tanner et al. 1984) Vandamme et al. 1991
               05 Campylobacter gracilis (Tanner et al. 1981) Vandamme et al. 1995
               06 Campylobacter helveticus Stanley et al. 1993
               07 Campylobacter hominis Lawson et al. 2001
               08 [Campylobacter hyointestinalis] Gebhart et al. 1985
               09 Campylobacter insulaenigrae Foster et al. 2004
               10 [Campylobacter jejuni] (Jones et al. 1931) Véron and Chatelain 1973 (Approved Lists 1980)
               11 Campylobacter lanienae Logan et al. 2000
               12 Campylobacter lari corrig. Benjamin et al. 1984
               13 Campylobacter mucosalis (Lawson et al. 1981) Roop et al. 1985
               14 Campylobacter rectus (Tanner et al. 1981) Vandamme et al. 1991
               15 Campylobacter showae Etoh et al. 1993
               16 [Campylobacter sputorum] (Prévot 1940) Véron and Chatelain 1973 (Approved Lists 1980)
               17 Campylobacter upsaliensis Sandstedt and Ursing 1991