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?] Phylum "Deltaproteobacteria" Kuever et al., 2006 [polyphyletic] Class Deltaproteobacteriaᵀ Kuever et al. 2006 Order Desulfovibrionales Kuever et al. 2006 1 Family Desulfovibrionaceaeᵀ Kuever et al. 2006 2 Family Desulfomicrobiaceae Kuever et al. 2006 3 Family Desulfohalobiaceae Kuever et al. 2006 4 Family Desulfonatronaceae corrig. Kuever et al. 2006 [monotypic]