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 Oceanospirillaceaeᵀ Garrity et al. 2005 Genus Oceanospirillumᵀ Hylemon et al. 1973 (Approved Lists 1980) Oceanospirillum beijerinckii (Williams and Rittenberg 1957) Hylemon et al. 1973 (Approved Lists 1980) Oceanospirillum beijerinckii subsp. beijerinckiiᵀ (Williams and Rittenberg 1957) Pot et al. 1989