Natura - nature actualia - actual entities Mundus Plinius - physical world naturalia - natural bodies [[crown] organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020] [Empire Prokaryota (Dougherty 1957) Allsopp 1969] see Domain Bacteria Woese et al. 1990 [Kingdom "Bacteria" (Cohn 1870) Cavalier-Smith 1983 - bacteria] see Kingdom Bacteria Cavalier-Smith 2002 [Subkingdom Eubacteria Cavalier-Smith 1981] see Domain Bacteria Woese et al. 1990 [Division Gracilicutes Gibbons and Murray 1978 (Approved Lists 1980)] see Phylum Gracilicutes [Phylum Spirochaetae (Ehrenberg 1855) Cavalier-Smith 1998] see Phylum Spirochaetes Garrity and Holt 2001 ["Spirochaetales"ᵀ Buchanan, 1917] see Order Spirochaetales Buchanan 1917 (Approved Lists 1980)