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 "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 2 [Family "Helicobacteraceae" nom. inval.] see Family Helicobacteraceae Garrity et al. 2006