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 Oceanospirillales Garrity et al. 2005 Family Hahellaceae Garrity et al. 2005 Genus Hahellaᵀ Lee et al. 2001 1 Hahella antarctica Lee et al. 2008 2 Hahella chejuensisᵀ Lee et al. 2001 3 Hahella ganghwensis Baik et al. 2005