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 "Betaproteobacteria" Garrity et al., 2006 [monotypic] Class Betaproteobacteriaᵀ Garrity et al. 2006 Order Nitrosomonadales Garrity et al. 2006 Family Gallionellaceae Henrici and Johnson 1935 (Approved Lists 1980) Genus Gallionellaᵀ Ehrenberg 1838 (Approved Lists 1980) [monotypic] 1 Gallionella ferrugineaᵀ Ehrenberg 1838 (Approved Lists 1980)