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 "Gammaproteobacteria" Garrity et al., 2005 [monotypic] Class Gammaproteobacteriaᵀ Garrity et al. 2005 Order Legionellales Garrity et al. 2005 Family Legionellaceaeᵀ Brenner et al. 1979 (Approved Lists 1980) [monotypic] Genus Legionellaᵀ Brenner et al. 1979 (Approved Lists 1980) Legionella micdadei Hébert et al. 1980