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 Methylococcales Bowman 2005 Family Methylococcaceaeᵀ Whittenbury and Krieg 1984 Genus Methylococcusᵀ Foster and Davis 1966 (Approved Lists 1980) Methylococcus mobilis Hazeu et al. 1980