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?] Superphylum "Proteobacteria" Craig et al. 2010 Phylum "Alphaproteobacteria" Garrity et al., 2006 [monotypic] Class Alphaproteobacteriaᵀ Garrity et al. 2006 Order Caulobacterales Henrici and Johnson 1935 (Approved Lists 1980) [Suborder Caulobacterineae Breed et al. 1944 (Approved Lists 1980)] see Order Caulobacterales Henrici and Johnson 1935 (Approved Lists 1980)