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 "Betaproteobacteria" Garrity et al., 2006 [monotypic] Class Betaproteobacteriaᵀ Garrity et al. 2006 Order Burkholderiales Garrity et al. 2006 Family Comamonadaceae Willems et al. 1991 Genus Simplicispira Grabovich et al. 2006 Simplicispira psychrophila (Terasaki 1973) Grabovich et al. 2006