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 Acidobacteria Thrash and Coates 2012 1 Class Blastocatellia Pascual et al. 2016 2 Genus Paludibaculum Kulichevskaya et al. 2014, incertae sedis [monotypic] 3 Class Acidobacteriaᵀ Cavalier-Smith 2002 4 Class Holophagae Fukunaga et al. 2008