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 Alteromonadales Bowman and McMeekin 2005 Family Pseudoalteromonadaceae Ivanova et al. 2004 Genus Pseudoalteromonasᵀ Gauthier et al. 1995 Pseudoalteromonas undina (Chan et al. 1978) Gauthier et al. 1995