Natura - nature actualia - actual entities Mundus Plinius - physical world naturalia - natural bodies [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020] Domain Bacteria Woese et al. 1990 [paraphyletic?] Phylum "Epsilonproteobacteria" Garrity et al., 2006 Class Epsilonproteobacteriaᵀ Garrity et al. 2006 Order Campylobacterales Garrity et al. 2006 Family Campylobacteraceaeᵀ Vandamme and De Ley 1991 Genus Campylobacterᵀ Sebald and Véron 1963 (Approved Lists 1980) Campylobacter mucosalis (Lawson et al. 1981) Roop et al. 1985