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 Rhizobiales Kuykendall 2006 Family Rhodobiaceae Garrity et al. 2006 Genus Rhodobiumᵀ Hiraishi et al. 1995 1 Rhodobium gokarnense Srinivas et al. 2007 2 Rhodobium orientis Hiraishi et al. 1995 n1 [Rhodobium marinum (Imhoff 1984) Hiraishi et al. 1995] see Afifella marina (Imhoff 1984) Urdiain et al. 2009 n2 [Rhodobium pfennigii Caumette et al. 2007] see Afifella pfennigii (Caumette et al. 2007) Urdiain et al. 2009