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 Fibrobacteres-Chlorobi-Bacteroidetes (FCB) Gupta 2004 Phylum Fibrobacteres Garrity and Holt 2012 Class Fibrobacteriaᵀ Spain et al. 2012 [monotypic] Order Fibrobacteralesᵀ Spain et al. 2012 [monotypic] 1 Family Fibrobacteraceaeᵀ Spain et al. 2012 [monotypic]